(1)

Debt is comprised of amounts outstanding under our credit facilities and our unsecured subordinated promissory notes. In June 2010, we replaced our revolving credit facility and our term loan with a new credit facility. As a result of the refinancing, we expensed $2.3 million, including the unamortized portion of the previously deferred financing costs and early termination fees. See "Management's Discussion and Analysis of Financial Condition and Results of Operations—Description of Indebtedness."

(2)

Other income (expense) for the year ended December 31, 2008 includes a $4.3 million net gain related to an insurance settlement with respect to an Aircrane accident; and for the 2010 period includes a net gain related to an Aircrane accident in Malaysia of $6.3 million, after accounting for insurance proceeds, and $10.0 million in litigation settlement expenses.

(3)

Dividends on Series A Redeemable Preferred Stock represent non-cash accruals. No cash dividends have been paid or will be paid to holders of Series A Redeemable Preferred Stock. The Series A Redeemable Preferred Stock and the Class A common stock will be converted into 7,405,436 shares of a single class of common stock in connection with this offering. See "Explanatory Note Regarding Recapitalization."

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(4)

Pro forma amounts give effect to our recapitalization in connection with this offering, including the conversion of Series A Redeemable Preferred Stock into common stock. The pro forma weighted diluted share amounts also include 643,951 shares of restricted common stock, or rights to receive common stock, of which we intend to issue             shares, or rights to receive shares, concurrently with this offering under our 2012 Stock Incentive Plan (except for the year ended December 31, 2010 because the effect of including these shares would be anti-dilutive). See "Explanatory Note Regarding Recapitalization" and "Executive Compensation—2012 Stock Incentive Plan."

(5)

Working capital is calculated as our current assets less our current liabilities.

(6)

Represents Series A Redeemable Preferred Stock which will be converted into common stock in connection with this offering. See "Explanatory Note Regarding Recapitalization" and note 3 above.

(7)

We define EBITDA as net income (loss) before interest expense, net, provision for (benefit from) income taxes, and depreciation and amortization.

To provide investors with additional information regarding our financial results, we have disclosed in the table below and elsewhere in this prospectus EBITDA, a non-GAAP financial measure. We have provided a reconciliation below of EBITDA to net income (loss), the most directly comparable GAAP financial measure. EBITDA is not a financial measurement prepared in accordance with GAAP and should not be considered as an alternative to revenue, net income (loss) as a measure of operating performance or to cash flows from operating activities as a measure of liquidity or any other measure of financial performance presented in accordance with GAAP. We present EBITDA because we believe it is an important measure of our operating performance and provides more comparability between our historical results by taking into account our capital structure including (i) changes in our asset base (depreciation and amortization) from acquisitions and from capital expenditures, and (ii) changes in interest expense and amortization of financing costs. Because not all companies use identical calculations, our presentation of EBITDA may not be comparable to similarly titled measures of other companies.

The following table presents a reconciliation of net income (loss) to EBITDA for each of the periods indicated:

(8)

We use an adjusted EBITDA ("Bank EBITDA") to monitor compliance with various financial covenants under the credit agreement dated June 24, 2010, by and among us, Wells Fargo Bank, National Association, Wells Fargo Securities, LLC, Keybank National Association and Bank of the West (as amended, the "Credit Agreement") and in connection with measuring performance for management incentive compensation. In addition to adjusting net income (loss) to exclude interest expense, net, provision for (benefit from) income taxes, and depreciation and amortization, Bank

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EBITDA also adjusts net income by excluding non-cash mark-to-market foreign exchange gains (losses), specified litigation expenses up to a maximum of $2.0 million for any 12-month period, certain management fees, gains from sale of equipment, non-cash charges arising from awards to employees relating to equity interests, non-cash charges relating to financings, initial public offering-related non-capitalized expenses up to a maximum of $2.0 million, certain fourth quarter 2010 charges up to $11.6 million and other unusual, extraordinary, non-recurring, non-cash costs. For each calculation of Bank EBITDA made as of the end of the quarters ending June, September, and December, 2011 and March, 2012, Bank EBITDA also includes an amount equal to the $10.0 million in new unsecured subordinated promissory notes dated June 30, 2011 and any additional subordinated debt issued in connection with an equity cure under the Credit Agreement. Such amounts have been excluded from this table for presentation purposes. Bank EBITDA also assists us in monitoring our ability to undertake key investing and financing functions such as making investments and incurring additional indebtedness, which may be prohibited by the covenants under our credit facilities unless we meet certain financial ratios and tests. Bank EBITDA, as presented herein, is a supplemental measure of our performance that is not required by or presented in accordance with GAAP. Bank EBITDA is not a measurement of our financial performance under GAAP and should not be considered as an alternative to revenue, net income (loss), cash flow, or any other performance measure derived in accordance with GAAP. Our presentation of Bank EBITDA may not be comparable to similarly titled measures of other companies. See "Management's Discussion and Analysis of Financial Condition and Results of Operations—Description of Indebtedness—Bank EBITDA."

  The following table presents a reconciliation of EBITDA to Bank EBITDA for the periods indicated:

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RISK FACTORS

    Investing in our common stock involves a high degree of risk. You should carefully consider the risks described below and the other information in this prospectus before making a decision to invest in our common stock. If the events described below actually occur, our business, operating results, or financial condition could be materially adversely affected. In those cases, the trading price of our common stock could decline and you may lose all or part of your investment.

Risks Related to Our Business

Our helicopter operations involve significant risks, which may result in hazards that may not be covered by our insurance or may increase the cost of our insurance.

    The operation of helicopters inherently involves a high degree of risk. Hazards such as aircraft accidents, mechanical failures, collisions, fire, and adverse weather may result in loss of life, serious injury to employees and other persons, damage to property, losses of equipment and revenues, and suspension or reduction of operations. The aerial services we provide and the missions we fly, which include firefighting and timber harvesting in confined spaces, can be hazardous. Since 2003, we have experienced an average of 6.7 incidents per 1,000 flight hours and 0.07 accidents per 1,000 flight hours. An "incident" is an occurrence, other than an accident, which affects or could affect the safety of operations; an "accident" is an occurrence associated with the operation of an aircraft, which takes place between the time any person boards the aircraft with the intention of flight and all such persons have disembarked, and in which any person suffers death or serious injury, or in which the aircraft receives substantial damage. Since 2003, we had seven accidents that resulted in the loss or hangar rebuild of aircraft, injuries to pilots and crew, and four fatalities, including an accident in June 2010 that resulted in the loss of an aircraft and the death of a pilot. In addition, we ship our helicopters to various locations, which exposes them to risks, including risks relating to piracy and inclement weather, when in transit.

    We maintain hull and liability insurance on our aircraft, which insures us against physical loss of, or damage to, our aircraft and against certain legal liabilities to others. In addition, we carry war risk, expropriation, confiscation, and nationalization insurance for our aircraft involved in international operations. In some instances, we are covered by indemnity agreements from our customers in lieu of, or in addition to, our insurance. In addition, we maintain product liability insurance for aircraft and aircraft components we manufacture. We do not currently maintain business interruption insurance, which would cover the loss of revenue during extended periods, such as those that occur during unscheduled extended maintenance or due to damage to aircraft from accidents. In addition, our insurance will not cover any losses incurred pursuant to any performance provisions under agreements with our customers.

    Our insurance and indemnification arrangements may not cover all potential losses and are subject to deductibles, retentions, coverage limits, and coverage exceptions and, as a result, severe casualty losses or the expropriation or confiscation of significant assets could materially and adversely affect our financial condition or results of operations. The insured value of one of our aircraft is typically lower than its replacement cost, and our aircraft are not insured for loss of use. The occurrence of an event that is not fully covered by insurance could have a material adverse impact on our financial condition, results of operations, and cash flows. The loss of an aircraft, which we believe would take us approximately six months to replace, could negatively impact our operations.

Failure to maintain our safety record would seriously harm our ability to attract new customers and maintain our existing customers, and would increase our insurance costs.

    A favorable safety record is one of the primary factors a customer reviews in selecting an aviation provider. If we fail to maintain our safety and reliability record, our ability to attract new customers and maintain our current customers will be materially and adversely affected. In addition, safety violations could lead to increased regulatory scrutiny; increase our insurance rates, which is a significant operating cost; or increase the difficulty of maintaining our existing insurance coverage in the future, which would adversely affect our operations. Because of the inherent risks in our helicopter operations, no safety

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program can guarantee accidents will not occur. Since 2003, we have experienced an average of 6.7 incidents per 1,000 flight hours and 0.07 accidents per 1,000 flight hours. An "incident" is an occurrence, other than an accident, which affects or could affect the safety of operations; an "accident" is an occurrence associated with the operation of an aircraft, which takes place between the time any person boards the aircraft with the intention of flight and all such persons have disembarked, and in which any person suffers death or serious injury, or in which the aircraft receives substantial damage. Since June 2003, we had seven accidents that resulted in the loss or hangar rebuild of aircraft, injuries to pilots and crew, and four fatalities, including an accident in June 2010 that resulted in the loss of an aircraft and the death of a pilot.

Our indebtedness could adversely affect our financial condition and impair our ability to operate our business.

    We are a highly leveraged company and, as a result, have significant debt service obligations. As of September 30, 2011, our total indebtedness, excluding letters of credit, was $122.0 million, consisting of $45.6 million borrowed under our revolving credit facility, $56.9 million borrowed under our term loan facility and $19.5 million borrowed under unsecured subordinated promissory notes. At September 30, 2011, we had maximum availability for borrowings under our revolving credit facility of approximately $21.8 million.

    Our substantial indebtedness could have significant negative consequences to us that you should consider. For example, it could:

•

require us to dedicate a substantial portion of our cash flow from operations to pay principal of, and interest on, our indebtedness, thereby reducing the availability of our cash flow to fund working capital, capital expenditures, or other general corporate purposes, or to carry out other aspects of our business plan;



•

increase our vulnerability to general adverse economic and industry conditions and limit our ability to withstand competitive pressures;



•

limit our flexibility in planning for, or reacting to, changes in our business and future business opportunities;



•

place us at a competitive disadvantage compared to our competitors that have less debt; and



•

limit our ability to obtain additional financing for working capital, capital expenditures, and other aspects of our business plan.

    Our ability to meet our debt obligations and other expenses will depend on our future performance, which will be affected by financial, business, economic, regulatory, and other factors, many of which we are unable to control. See "Management's Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Estimates—Revenue Recognition."

    We amended the Credit Agreement effective December 31, 2010. An initial amendment removed the requirement to comply with existing financial covenants as of December 31, 2010, added a net income covenant calculation for fiscal 2010, and adjusted certain amounts related to the determination of Bank EBITDA and tangible net worth. In addition, the interest rate matrix was modified to add an additional pricing tier. Subsequent amendments waived our non-compliance with certain requirements and financial covenants under the Credit Agreement for both the fourth quarter of 2010 and the first quarter of 2011, and modified the financial covenants for future periods. These amendments modified the interest rate matrix and adjusted our financial reporting requirements. In connection with these amendments we issued new unsecured subordinated promissory notes in the amount of $10.0 million to ZM Private Equity Fund I, L.P. and ZM Private Equity Fund II, L.P., which were funded on June 30, 2011. Absent these amendments, we would not have been in compliance with the covenants in the Credit Agreement at December 31, 2010 and March 31, 2011. We were in compliance with our Credit Agreement covenants at June 30, 2011 and September 30, 2011. See "Management's Discussion and Analysis of Financial Condition and Results of Operations—Description of Indebtedness."

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    Our indebtedness is secured by liens on substantially all of our assets, including our interests in our subsidiaries, against which our lenders could proceed if we default on our obligations. When our term loan and revolving loan come due in 2013, we will likely need to enter into new financing arrangements to repay those loans. We may be unable to obtain financing on favorable terms or at all, which could adversely affect our business, financial condition, and results of operations. For more information on our indebtedness, please see our financial statements included elsewhere in this prospectus and our description of indebtedness in "Management's Discussion and Analysis of Financial Condition and Results of Operations—Description of Indebtedness."

We make estimates in accounting for revenues and costs, and any changes in these estimates may have significant impacts on our earnings.

    We sell Aircranes under long-term contracts with our customers. We have historically, including in the periods presented in this prospectus, recognized revenues on Aircrane sales when the aircraft is delivered to a customer. We expect to account for Aircrane sales using the percentage of completion method of accounting, when all of the requirements are met. Revenue on contracts using the percentage of completion method is recognized as work progresses toward completion and is based on estimates, including estimated labor hours. See "Management's Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Estimates—Revenue Recognition."

    Our Aircranes are normally manufactured under long-term construction contracts, and we expect to recognize revenues for Aircrane sales over several fiscal periods. Changes in estimates affecting sales, costs, and profits are recognized in the period in which the change becomes known using the cumulative catch-up method of accounting, resulting in the cumulative effect of changes reflected in the period. A significant change in an estimate on one or more contracts could have a material effect on our results of operations.

    We also offer cost per hour contracts to customers under which we provide components and expendable supplies for a customer's aircraft at a fixed cost per flight hour. If actual costs vary materially from our estimates, our operating results could be materially and adversely affected.

The helicopter services business is highly competitive.

    Each of our segments faces significant competition. We compete for most of our work with other helicopter operators and, for some operations, with fixed-wing operators and ground-based alternatives. Many of our contracts are awarded after competitive bidding, and competition for those contracts is generally intense. The principal aspects of competition are safety, price, reliability, availability, and service.

    We have several major competitors and numerous small competitors operating in our aerial services markets. In the firefighting market, we compete heavily with both helicopter and fixed-wing operators. Our competitors may at times undercut our prices, especially if they are at risk of having too many idle aircraft. In the timber harvesting market, we compete with other heavy-lift helicopter operators, medium-lift helicopter operators, and ground-based solutions. The cyclical supply/demand for timber may at times drive down commodity prices, which in turn can make lower cost/productivity solutions more attractive. A competitor could develop, or acquire (including from the military) and adapt, an aircraft with heavy-lift capability that directly competes with one of our aircraft and diminishes its competitive advantages; while we are not aware of current development of a competitive aircraft or any competitor's plan to acquire and convert a military helicopter to civilian uses that would compete with our services, such a development could adversely affect our results of operations. The conversion of a military aircraft for civilian use would take time and expense and would typically be subject to an extended FAA approval process, which mitigates the short-term risk to our business of such a conversion.

    In the manufacturing and MRO market, our competitors may have more extensive or more specialized engineering, manufacturing, and marketing capabilities than we do in some areas. In addition, some of our largest customers could develop the capability to manufacture products or provide services similar to products that we manufacture or services that we provide. This could result in these customers supplying

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their own products or services and competing directly with us for sales of these products or services, all of which could significantly reduce our revenues. Furthermore, we are facing increased international competition and cross-border consolidation of competition.

    We cannot assure you that we will be able to compete successfully against our current or future competitors or that the competitive pressures we face will not result in reduced revenues and market share. If we are unable to adjust our costs relative to our pricing, our profitability will suffer. In addition, some of our competitors may have greater financial and other resources than we do, and may therefore be able to react to market conditions and compete more effectively than we do.

Factors beyond our control, including weather and seasonal fluctuations, may reduce aircraft flight hours, which would affect our revenues and operations.

    A significant portion of our operating revenue is dependent on actual flight hours, and a substantial portion of our direct costs is fixed. Flight hours could be negatively impacted by factors beyond our control and fluctuate depending on cyclical weather-related and seasonal limitations, which would affect our revenues and operations. These factors include:

•

poor weather conditions;



•

unexpected maintenance or repairs; and



•

unexpectedly calm fire seasons.

    From November through February, heavy snow in North America and significant rainfall in Asia Pacific can impede timber harvesting operations. Our aircraft are not currently equipped to fly at night, reinforcing the seasonality of our business with more activity in the Northern Hemisphere during the summer months and less activity during the winter months. Also, firefighting activity is dependent on fires in dry conditions during summer months. In addition, there is variability in the number and extent of fires from year to year, and these patterns are not predictable.

    The missions that we fly can be flown safely only if weather conditions permit. Poor visibility, high winds, and heavy precipitation can restrict the operation of helicopters and significantly reduce our flight hours. Reduced flight hours can have a material adverse effect on our business, financial condition, and results of operations. We budget for our operations based on historical weather information, but worse than expected weather could materially affect our results of operations.

We depend on a small number of large customers for a significant portion of our revenues.

    We expect to derive a significant amount of our revenue from a small number of major customers, including the U.S. Forest Service, the Hellenic Fire Brigade, the Italian Ministry of Civil Protection, and Samling Global. Approximately 61.5% of our 2010 revenues were attributable to these customers. Approximately 57.2% of revenues for the nine months ended September 30, 2011 were attributable to these customers. Several of our largest customers are governmental agencies or entities that may be subject to budget or other financial constraints. The economies of Greece and Italy in particular have been adversely affected by global financial pressures. We may suffer delays in payment, payment defaults or termination of contracts of governmental agencies or entities as a result of such financial difficulties, which would adversely affect our results of operations. Some of our customer contracts, including those with the U.S. Forest Service and the Australia Fire Service, include "call when needed" provisions, and therefore the precise amounts we will ultimately earn under these agreements are not known. Contracts with the majority of our significant customers are multi-year contracts; however, these contracts are periodically up for renewal or rebid. Renewal, or a successful rebid, is not guaranteed. Should we lose one of our significant customers, we cannot assure you that we will be able to offset the loss with revenues from new or other existing customers. Reduced revenues would have a material adverse effect on our business and operations. If one or more of these customers is disproportionately impacted by factors that affect its ability to pay us or to enter into new contracts, including general economic factors, our operations could be materially and adversely affected.

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    In the past, several of our larger contracts have not been renewed for reasons unrelated to our performance, such as the financial condition of our customers or their decision to move the services we provided to them in-house. For example, in 2007 we were not awarded any long-term contracts by the U.S. Forest Service. Accordingly, we cannot assure you that in any given year we will be able to generate similar revenues from our customers as we did in the previous year. Our current contract with the U.S. Forest Service ends at the end of 2011 and, though we submitted a bid pursuant to our new tender for service in 2012, with three one-year extensions, there is no guarantee that this contract will be renewed.

Some of our backlog may be deferred or may not be entirely realized.

    Backlog represents the amount of revenue that we expect to derive from signed contracts, including oral contracts that have been subsequently memorialized in writing, or anticipated contract extensions. As of September 30, 2011, we had approximately $133.1 million of backlog, of which $103.4 million was from signed contracts and $29.8 million was from anticipated contract extensions. We expect that approximately $111.8 million of the backlog will not be filled within the current fiscal year. For contracts that include both a daily and hourly rate component, only the daily component of revenue is included in backlog and an estimate of the expected hourly revenue is not included. For contracts that include a guaranteed number of hours, the value of the guaranteed hours is included in backlog. For cost per hour contracts, which depend on hours flown by our customers, we calculate the contribution to backlog based on contracted minimum hours. When a binding aircraft sale contract has been signed with a customer, the purchase price of the aircraft is included in backlog. When we sign a contract giving a potential purchaser an option to purchase an aircraft which only becomes binding on a non-refundable payment of a material option fee, we do not include the purchase price of the aircraft in backlog until the non-refundable payment has been made and the contract is a binding purchase contract. A customer may default on a purchase contract that has become binding, and we may not be able to convert sales contract backlog into revenue. We calculate the contribution to backlog for some timber harvesting contracts based on our estimate of the cubic meters of high grade timber we expect to deliver under the contract based on our experience. As a result, our estimates of backlog for some of our timber harvesting contracts could be affected by variables beyond our control and may not be entirely realized, if at all.

    In addition, given the nature of our customers and our industry, there is a risk that our backlog may not be fully realized in the future. For example, the terms of contracts with the U.S. Government, such as our contract with the U.S. Forest Service, generally permit the U.S. Government to terminate the contract, partially or completely, without cause, at the end of each annual period of the contract. Our contracts with other customers may contain similar provisions. A large portion of our operating expenses are relatively fixed and cancellations, reductions or delays in orders by a customer could have a material adverse effect on our business, financial condition and results of operations. Any unexpected termination of a significant government contract could have a material adverse effect on our results of operations. Failure to realize sales from our existing or future backlog would negatively impact our financial results.

Cancellations, reductions or delays in customer orders, delays in delivery of Aircranes, or customer breaches of purchase agreements may adversely affect our results of operations and our ability to comply with covenants under our Credit Agreement.

    Operating results in our Manufacturing / MRO segment are affected by many factors, including the timing of orders from large customers and the timing of expenditures to manufacture parts and purchase inventory in anticipation of future sales of products and services. The sale of Aircranes has a material effect on our financial results, and Aircrane sales have been a dominant factor in fluctuations in our year-over-year results.

    As we have expanded internationally and sought to make Aircrane sales in the difficult economic environment in the last few years, several potential customers have defaulted or not completed anticipated Aircrane sales. In September 2010, we entered into an Aircrane purchase agreement with a potential Brazilian purchaser which required staged payments beginning in September 2010 based on set conditions, but was subject to financing being arranged by the purchaser. Although we substantially completed the

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Aircrane for delivery, no payments were made by the purchaser and we terminated the agreement in December 2010. Subsequently, we have entered into non-binding letters of intent for several Aircrane sales that have not resulted in sales as the potential customers could not obtain financing or did not make required deposits. Accordingly, we have incurred significant costs in building Aircranes for sale but have been unable to sell any in 2010 or 2011. In the past, failures to make sales of an Aircrane have resulted in financial performance below our expectations, and we have obtained waivers from our lenders and have amended our Credit Agreement in order to meet our financial and reporting covenants.

    On August 1, 2011, we entered into an Aircraft Lease and Purchase Option Agreement with HRT, which agreement was amended on October 11, 2011. Pursuant to the terms of the agreement, as amended, HRT has an option to purchase one Aircrane on or prior to January 15, 2012. If HRT does not exercise its purchase option, or does not otherwise purchase the Aircrane, there is a risk that we may fail to meet certain covenants under our Credit Agreement in 2012. See "—Our indebtedness could adversely affect our financial condition and impair our ability to operate our business."

Some of our arrangements with customers are short-term, ad hoc or "call when needed." As a result, we cannot assure you that we will be able to continue to generate similar revenues from these arrangements.

    We generate a large portion of our revenues from arrangements with customers with terms of less than one year, ad hoc arrangements, and "call when needed" contracts. In 2010, for example, approximately 24% of our revenues were derived from such arrangements. There is a risk that customers may not continue to seek the same level of services from us as they have in the past or that they will not renew these arrangements or terminate them at short notice. Under "call when needed" contracts, we pre-negotiate rates for providing services that customers may request that we perform (but which we are not typically obligated to perform) depending on their needs. The rates we charge for these contingent services are higher than the rates under stand-by arrangements, and we attempt to schedule our aircraft to maximize our revenue from these types of contracts. The ultimate value we derive from such contracts is subject to factors beyond our control, such as the severity and duration of fire seasons. In the past, several of our larger contracts have not been renewed for reasons unrelated to our performance, such as the financial condition of our customers or their decision to move the services we provided to them in-house. For example, in 2007 we were not awarded any long-term contracts by the U.S. Forest Service. Accordingly, we cannot assure you that in any given year we will be able to generate similar revenues from our customers as we did in the previous year. Our current contract with the U.S. Forest Service ends at the end of 2011 and, though we submitted a bid pursuant to our new tender for service in 2012 with three one-year extensions, there is no guarantee that this contract will be renewed.

Our Aerial Services revenues depend on the availability and size of our Aircrane fleet.

    We currently have 17 Aircranes that we employ in providing Aerial Services. An accident could make an Aircrane unavailable to us temporarily or permanently. A sale of an Aircrane that is part of our fleet would also reduce the number of Aircranes available to provide Aerial Services. The Aircrane that is subject to the Aircraft Lease and Purchase Option Agreement with HRT is one of the 17 Aircranes in our Aerial Services fleet. If HRT exercises its purchase option, we will have 16 Aircranes in our fleet. Although we expect to be able to maintain the level of our operations through more efficient scheduling of our fleet or by allocating Aircranes held for sale to Aerial Services operations in 2012, we may not always have the ability to maintain our desired level of Aerial Services operations with a reduced fleet and our results of operations could be adversely affected.

Aircrane production rates could change.

    The market for Aircranes is variable and we have historically manufactured a limited number of Aircranes in any year. Production rate reductions could cause us to incur disruption and other costs, which could reduce our profitability. Higher orders for Aircranes could lead to production rate increases in order to meet customers' delivery schedules. If customer demand increases significantly, we anticipate being able to meet such demand by rapidly expanding our manufacturing capacity and related resources. While we

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believe our manufacturing operations are scalable, we may encounter difficulties in any period during which we seek to expand our manufacturing capacity and related resources. Failure to successfully implement any production rate changes could lead to extended delivery commitments, and depending on the length of any delay in meeting delivery commitments, additional costs and customers rescheduling their deliveries or terminating their related contract with us.

Foreign, domestic, federal, and local government spending and mission priorities may change in a manner that materially and adversely affects our future revenues and limits our growth prospects.

    Our business depends upon continued government expenditures on programs that we support. These expenditures have not remained constant over time. For example, the overall U.S. Forest Service budget declined for periods of time in the late 1980s and the early 1990s, resulting in a slowing of new program starts, program delays, and program cancellations. These reductions caused many Forest Service related government contractors to experience declining revenues, increased pressure on operating margins, and, in some cases, net losses. While spending authorizations for Forest Service programs by the U.S. Government have increased in recent years, future levels of expenditures, mission priorities, and authorizations for these programs may decrease, remain constant, or shift to program areas in which we do not currently provide services. Current foreign and domestic government spending levels on programs that we support may not be sustainable as a result of changes in government leadership, policies, or priorities. In addition, the economies of Greece and Italy in particular have been adversely affected by global financial pressures. Additionally, our business, prospects, financial condition, or operating results could be materially harmed by the following:

•

budgetary constraints affecting government spending generally, or specific departments or agencies in particular, and changes in fiscal policies or available funding;



•

changes in government programs or requirements;



•

realignment of funds to changed government priorities;



•

government shutdowns (such as that which occurred during the U.S. Government's 1996 fiscal year) and other potential delays in government appropriations processes;



•

delays in the payment of our invoices by government authorities;



•

adoption of new laws or regulations; and



•

general economic conditions.

    These or other factors could cause government agencies and departments to reduce their purchases under contracts, exercise their right to terminate contracts, or not exercise options to renew contracts, any of which could cause us to lose revenue. A significant decline in overall government spending or a shift in expenditures away from agencies or programs that we support could cause a material decline in our revenues and harm our financial results.

Product liability and product warranty risks could adversely affect our operating results.

    We produce, repair, and overhaul complex aircraft and critical parts for aircraft. Failure of our aircraft or parts could give rise to substantial product liability and other damage claims. We maintain insurance to address this risk, but our insurance coverage may not be adequate for some claims and there is no guarantee that insurance will continue to be available on terms acceptable to us, if at all.

    Additionally, aircraft and parts we manufacture for sale are subject to strict contractually established specifications using complex manufacturing processes. If we fail to meet the contractual requirements for a part, we may be subject to warranty costs to repair or replace the part itself and additional costs related to the investigation and inspection of non-complying parts. These costs are generally not insured. For example, in June 2011 we encountered an issue associated with an accessory failure on a customer's Aircrane that resulted in warranty cost to us of approximately $0.9 million in excess of amounts previously accrued.

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    We establish warranty reserves that represent our estimate of the costs we expect to incur to fulfill our warranty requirements. We base our estimate for warranty reserves based on our historical experience and other assumptions. If actual results materially differ from these estimates, our results of operations could be materially affected.

    Because we own the S-64 Type Certificate, we are obligated to issue directives to operators of our aircraft and to identify defects or required replacements to our aircraft. We could be liable to operators of our aircraft if we fail to fulfill our obligation to issue directives, even if our aircraft or components of our aircraft are no longer under warranty.

Our failure to attract and retain qualified personnel could adversely affect us.

    Our pilots and maintenance and manufacturing personnel are highly trained and qualified. Our ability to attract and retain qualified pilots, mechanics, and other highly trained personnel will be an important factor in determining our future success. Our aircraft, and the aerial services we provide, require pilots with high levels of flight experience. The market for these experienced and highly trained personnel is extremely competitive. Accordingly, we cannot assure you that we will be successful in our efforts to attract and retain such persons. Some of our pilots and mechanics, and those of our competitors, are members of the U.S. military reserves and could be called to active duty. If significant numbers of such persons were called to active duty, it would reduce the supply of such workers, possibly curtailing our operations and likely increasing our labor costs. Because of our small size relative to many of our competitors, we may be unable to attract qualified personnel as easily as our competitors.

The loss of key managers could negatively affect our business.

    We are dependent upon a number of key managers, including our CEO, Udo Rieder, our CFO, Charles Ryan, our Vice President of Aerial Services, H.E. "Mac" McClaren, our Senior Vice President of Global Sales and Marketing, David Valaer, and our Vice President of Manufacturing and MRO, David Ford. We have employment agreements with each of these key executive officers and intend to encourage their retention, in part, through the award of time-vesting equity grants. See "Management—Employment Agreements." If we were to lose the services of one or more of our key team members, our operations could be materially impacted. We do not maintain key person insurance on any team member.

The outcome of litigation in which we may be named as a defendant and of government inquiries and investigations involving our business is unpredictable, and an adverse decision in any such matter could result in significant monetary payments and have a material adverse affect on our financial position and results of operations.

    We may be a defendant in future litigation matters. These claims may divert financial and management resources that would otherwise be used to benefit our operations. We cannot assure you that the results of these matters will be favorable to us. An adverse resolution of any of these lawsuits could have a material adverse affect on our financial position and results of operations. In addition, we are sometimes subject to government inquiries and investigations of our business due to, among other things, our business relationships with the U.S. Government, the heavily regulated nature of our industry, and, in the case of environmental proceedings, our ownership of certain property. Any such inquiry or investigation could potentially result in an adverse ruling against us, which could result in significant monetary payments (including possible environmental remediation costs) and a material adverse effect on our financial position and operating results. See "Business—Legal Proceedings."

We are subject to FAA regulation and similar international regulation, and our failure to comply with these regulations, or the adoption of any new laws, policies, or regulations, may have a material adverse effect on our business.

    The aerial services business is heavily regulated by governmental entities in the United States and in other countries in which we operate. We operate in the United States under laws and regulations

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administered by the Department of Transportation, principally through the FAA. The FAA promulgates rules relating to the general operation of our aircraft, the process by which our aircraft are maintained, the components and systems that are installed in our aircraft, the qualification of our flight crews and maintenance personnel, and the specialized operations that we undertake, including the carrying of loads and the use of various chemicals. We are regularly inspected by FAA personnel to ensure compliance. Compliance with these rules is complex and costly, and the failure to comply could result in the imposition of fines, the grounding of our aircraft, or other consequences detrimental to our operations and operating results. Our operations in other countries are similarly regulated under equivalent local laws and regulations.

    Our aircraft manufacturing and MRO operations are also subject to regulation by the FAA and other governmental authorities. The FAA promulgates regulations applicable to the design and manufacture of aircraft and aircraft systems and components. It also sets and enforces standards for the repair of aircraft, systems, and components and for the qualification of personnel performing such functions. It regularly conducts inspections to ensure compliance and has the power to impose fines or other penalties for non-compliance or to shut down non-compliant operations. Our manufacturing and MRO operations are also subject to complex environmental, safety, and other regulations. Failure to comply with applicable regulations could result in the imposition of fines or other penalties or in the shutting down of our operations, which could impair our ability to fulfill our contracts or otherwise negatively impact our reputation for safety and dependability.

    The FAA approves major changes in aircraft design such as fuel control systems or new rotor blades. Such approvals take time, require investment, and are not assured. Similar regulatory bodies in other countries may accept FAA certification or may impose their own individual requirements. The failure to obtain FAA or other required approval for such changes, or the imposition of unanticipated restrictions as a condition of approval, could increase our production costs or reduce the effectiveness of the system in question and could render our development effort less valuable or, in an extreme case, worthless.

    The laws and regulations affecting our business are subject to change at any time and, because we operate under numerous jurisdictions, we are particularly exposed to the possibility of such changes. Any change in laws or regulations applicable to our business could restrict our operations, increase our costs, or have other effects detrimental to our results of operations or competitive position.

Our business is affected by federal rules, regulations, and orders applicable to government contractors, and the award of government contracts may be challenged.

    Some of our services are sold under U.S. or foreign government contracts or subcontracts. Consequently, we are directly and indirectly subject to various federal rules, regulations and orders applicable to government contractors. From time to time, we are also subject to government inquiries and investigations of our business practices due to our participation in government programs. These inquiries and investigations are costly and consume internal resources. Violation of applicable government rules and regulations could result in civil liability, the cancellation or suspension of existing contracts, or the ineligibility for future contracts or subcontracts funded in whole or in part with federal funds, any of which could have a material adverse effect on our business.

    Governmental contracts typically require a competitive bid process, and the award of a contract may be subject to challenge by bid participants. For example, a competitor challenged the U.S. Forest Service contract we were awarded in 2008. As a result, we provided services to the U.S. Forest Service without a contract for a period of time, pending resolution of the challenge. See "Business—Legal Proceedings" for additional information.

Environmental and other regulation and liability may increase our costs and adversely affect us.

    We are subject to a variety of laws and regulations, including environmental and health and safety regulations. Because our operations are inherently hazardous, compliance with these regulations is

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challenging and requires constant attention and focus. We are subject to federal, state, and foreign environmental laws and regulations concerning, among other things, water discharges, air emissions, hazardous material and waste management, and environmental cleanup. Environmental laws and regulations continue to evolve, and we may become subject to increasingly stringent environmental standards in the future, particularly under air quality and water quality laws and standards related to climate change issues, such as reporting greenhouse gas emissions. We are required to comply with environmental laws and with the terms and conditions of multiple environmental permits. Our failure to comply with these regulations could subject us to fines and other penalties administered by the agencies responsible for environmental and safety compliance or by the FAA or other aviation-related agencies.

The occurrence of events for which the risk is allocated to us under our contracts could negatively impact our results of operations.

    Many of our contracts are fixed price contracts which could subject us to losses if we have cost overruns. Under these contracts, we typically are responsible for normal maintenance, repair, and fuel costs. In addition, some of our Aerial Services contracts have performance penalty provisions, subjecting us to the risk of unexpected down time caused by mechanical failures or otherwise, which could cause our net income to suffer. Risks associated with estimating our costs and revenues are exacerbated for long-term contracts, which include most of our material contracts.

    Our contracts to manufacture aircraft and major overhauls or components typically contain penalty provisions that require us to make payments to customers, or provide interim aerial services to them at no cost, if we are unable to timely deliver aircraft or components. Such contracts may also include a repurchase obligation by us if certain performance or other criteria are not met.

We may be required to provide components or services to owners or operators of the S-64 or the CH-54, which could limit our operational flexibility and divert resources from more productive uses.

    Because we own the S-64 Type Certificate, we may be required to supply components or provide MRO services to customers who own or operate the S-64 or the CH-54, the military version of the S-64. This could limit our operational flexibility, divert resources from more productive uses, and adversely affect our ability to execute on our growth plans.

Our dependence on a small number of manufacturers for some of our aircraft components and the costs associated with the purchase or manufacture of new components pose significant risks to our business.

    We rely on approximately 120 supplier business units or locations for significant or critical components. A small number of manufacturers make some of the key components for our aircraft, and in some instances there is only a single manufacturer. If these manufacturers experience production delays, or if the cost of components increases, our operations could suffer. If a manufacturer ceases production of a required component, we could incur significant costs in purchasing the right to manufacture those components or in developing and certifying a suitable replacement, and in manufacturing those components.

    Many key components and parts on the Aircrane have not been manufactured since originally introduced. A significant portion of our inventory was acquired in bulk on the surplus market. For some aviation components, our operating cost includes the overhaul and repair of these components but does not include the purchase of a new component. It may be difficult to locate a supplier willing to manufacture replacement components at a reasonable cost or at all. As we exhaust our inventory, the purchase of any new components, or the manufacture by us of new components, could materially increase our operating cost or delay our operations; we routinely monitor levels of out-of-production parts and design and certify replacement parts to mitigate this risk.

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Our reliance on the Aircrane could harm our business and financial results if technical difficulties specific to the Aircrane occur.

    We exclusively fly and manufacture Aircranes and related components. If the Aircrane encounters technical or other difficulties, it may be grounded or lose value and we may be unable to sell the aircraft or parts or provide aerial services on favorable terms or at all. The inability to sell or contract out the Aircrane would virtually eliminate our ability to operate.

If we are unable to continue to develop new technologies and to protect existing technologies, we may be unable to execute on our growth and development plans.

    Our success has resulted in part from our development of new applications for our aircraft, such as our fire tank and snorkel for firefighting services, and we believe our growth will continue to depend on the development of new products or applications. Competitors may develop similar applications for their aircraft, which would increase our competition in providing aerial services. In addition, our growth strategy depends, in part, on our ability to develop new products and applications. A number of factors, including FAA certifications, could result in our being unable to capitalize on the development costs for such products or applications. For example, we have devoted significant resources to our program to develop composite-material main rotor blades. If they are not certified by the FAA, we will be unable to recover our research and development costs and will need to expend additional resources to develop an alternative blade.

    Not all of our products and applications have been, or may be, patented or otherwise legally protected. If we are not able to adequately protect the inventions and intellectual property we have developed, in the U.S. and in foreign countries, we may face increased competition from those who duplicate our products, and our results of operations and growth opportunities could suffer.

Failure to adequately protect our intellectual property rights could adversely affect our operations.

    We rely upon intellectual property law, trade secret protection, and confidentiality and license agreements with our employees, clients, consultants, partners, and others to protect our intellectual property rights. Any of these parties may breach these agreements and we may not have adequate remedies for any specific breach. In addition, our competitors may independently develop equivalent knowledge, methods, and know-how, and we would not be able to prevent their use. To the extent that employees, partners, and consultants use intellectual property owned by others in their work for us, disputes may arise as to the rights in the related or resulting know-how and inventions. If any of our trade secrets, know-how, or other technologies were to be disclosed to or independently developed by a competitor, our business, financial condition, and results of operations could be materially adversely affected.

    We may have to engage in litigation to defend our trademarks, trade secrets, and other intellectual property rights. Even if we are successful, such litigation could result in substantial costs and be a distraction to management. If we are not successful in such litigation, we may lose valuable intellectual property rights.

    Any of our patents may be challenged, invalidated, circumvented, or rendered unenforceable. Our patents may be subject to reexamination proceedings affecting their scope. We cannot assure you that we will be successful should one or more of our patents be challenged for any reason. If our patent claims are rendered invalid or unenforceable, or narrowed in scope, the patent coverage afforded our products could be impaired, which could significantly impede our ability to market our products, negatively affect our competitive position, and harm our business and operating results.

    Further, we are a party to licenses that grant us rights to intellectual property, including trade secrets, that is necessary or useful to our business. One or more of our licensors may allege that we have breached

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our license agreement with them, and accordingly seek to terminate our license. If successful, this could result in our loss of the right to use the licensed intellectual property, which could adversely affect our ability to commercialize our technologies, products, or services, as well as harm our competitive business position and our business prospects.

Success within our Maintenance, Repair, and Overhaul business is dependent upon fleet utilization and continued outsourcing by helicopter operating companies.

    We currently conduct MRO services at facilities in Central Point, Oregon. Revenues at these facilities fluctuate based on demand for maintenance which, in turn, is driven by the number of helicopters operating and the extent of outsourcing of maintenance activities by helicopter operating and OEM companies. If the number of helicopters operating globally declines or outsourcing of maintenance and OEM activities declines, our results of operations and financial condition could be adversely affected.

Our business is subject to risks associated with international operations, including operations in emerging markets.

    We purchase products from and supply products to businesses located outside of the United States. We also have significant operations outside the United States. For the year ended December 31, 2010 and the nine months ended September 30, 2011, approximately 62.5% and 55.9%, respectively, of our total revenues were attributable to operations in non-U.S. countries. A number of risks inherent in international operations could have a material adverse effect on our international operations and, consequently, on our results of operations, including:

•

the uncertain ability of select non-U.S. customers to finance purchases and our inability as a result of lesser transparency in certain jurisdictions to evaluate the credit of potential customers accurately;



•

currency fluctuations, which can reduce our revenues for transactions denominated in non-U.S. currency or make our services relatively more expensive if denominated in U.S. currency;



•

difficulties in staffing and managing multi-national operations;



•

risks associated with transporting our aircraft, including risks associated with piracy and adverse weather;



•

fluctuations in the costs associated with transporting our aircraft, pilots, and crews, which are significant operating costs for us;



•

limitations on our ability to enforce legal rights and remedies;



•

uncertainties regarding required approvals or legal structures necessary to operate aircraft or provide our products and services in a given jurisdiction;



•

restrictions on the repatriation of funds from our foreign operations;



•

changes in regulatory structures or trade policies;



•

tariff and tax regulations;



•

ensuring compliance with the Foreign Corrupt Practices Act;



•

difficulties in obtaining export and import licenses;



•

the risk of government-financed competition; and



•

political instability.

    Part of our growth strategy is to enter new markets, including emerging market countries such as China and in South America. Emerging market countries have less developed economies that are more vulnerable to economic and political problems and may experience significant fluctuations in gross

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domestic product, interest rates, and currency exchange rates, as well as civil disturbances, government instability, nationalization and expropriation of private assets, and the imposition of taxes or other charges by government authorities. The occurrence of any of these events and the resulting economic instability that may arise could adversely affect our operations in those countries, or the ability of our customers in those countries to meet their obligations. As a result, customers that operate in emerging market countries may be more likely to default than customers that operate in developed countries. In addition, legal systems in emerging market countries may be less developed, which could make it more difficult for us to enforce our legal rights in those countries. In particular, we have focused on expanding our presences in developing markets such as China and Malaysia, and the laws and regulations governing aviation sales and services may require approvals that are uncertain and enforcement of joint venture or other contractual relationships may be uncertain. For these and other reasons, our growth plans may be materially and adversely affected by adverse economic and political developments in emerging market countries.

If our employees unionize, our expenses could increase and our results of operations would suffer.

    Except for statutory protections for our 11 Italian pilots, none of our employees work under collective bargaining, union, or similar agreements. Unionization efforts have been made from time to time within our industry, with varying degrees of success. If our employees unionize, our expenses could increase and our results of operations would suffer.

The cost of fuel is a major operating expense, and fuel shortages and fluctuations in the price of fuel could adversely affect our operations.

    Our aerial operations depend on the use of jet fuel. Fuel costs have historically been subject to wide price fluctuations, and fuel availability is subject to shortage and is affected by demand for heating oil, gasoline, and other petroleum products. Fuel shortages and increases in the price of fuel, or decreases in the price of fuel when we have entered into hedging agreements, could adversely affect our operations.

We may not realize the anticipated benefits of acquisitions, joint ventures, strategic alliances, or divestitures.

    As part of our business strategy, we may acquire businesses or specific assets, form joint ventures or strategic alliances, and divest operations. Whether we realize the anticipated benefits from these transactions depends, in part, upon the integration between the businesses or assets involved; the performance of the underlying products, capabilities, or technologies; and the management of the transacted operations. We have had limited experience with such integrations. Accordingly, our financial results could be adversely affected by unanticipated performance issues, transaction-related charges, amortization of expenses related to intangibles, charges for impairment of long-term assets, credit guarantees, partner performance, and indemnifications. Consolidations of joint ventures could also impact our results of operations or financial position. Divestitures may result in continued financial involvement in the divested businesses, such as through guarantees or other financial arrangements, following the transaction. Nonperformance by those divested businesses could affect our future financial results.

We may be unable to access public or private debt markets to fund our operations and contractual commitments at competitive rates, on commercially reasonable terms, or in sufficient amounts.

    We depend, in part, upon borrowings under our credit facilities to fund our operations and contractual commitments. If we were called upon to fund all outstanding commitments, we may not have sufficient funds to do so. A number of factors could cause us to incur increased borrowing costs and to have greater difficulty accessing public and private markets for debt. These factors include general economic conditions, disruptions or declines in the global capital markets, and our financial performance, outlook, or credit ratings. An adverse change in any or all of these factors may materially adversely affect our ability to fund our operations and contractual or financing commitments.

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    Our senior credit facilities require us, among other obligations, to meet four significant financial covenants on a quarterly basis, including:

•

a minimum tangible net worth amount;



•

a minimum fixed charge coverage ratio;



•

a maximum leverage ratio; and



•

a minimum net income.

    If we do not meet our financial covenants and we do not obtain a waiver or amendment, our lenders may accelerate payment of all amounts outstanding which would immediately become due and payable, together with accrued interest. Any default may require us to seek additional capital or modifications to our credit facilities which may not be available or which may be costly. Additionally, our suppliers may require us to pay cash in advance or obtain letters of credit as a condition to selling us their products and services. Any of these risks and uncertainties could have a material adverse effect on our financial position, results of operations or cash flow.

    In addition, a significant customer holds the right to exercise a put option that would, if exercised, require us to repurchase on July 31, 2013 the Aircrane we sold to the customer in 2009. The put option was an important term to the purchaser when the sale agreement was negotiated. The exercise price would be the fair market value of the Aircrane, determined by independent appraisers at the time of exercise. The fair market value of the Aircrane at July 31, 2013 will be highly dependent upon the hours of usage and the customer use profile for the Aircrane, which makes it difficult to estimate a fair value at this time. However, management believes an anticipated range of fair value, based upon our experience and industry knowledge, may be approximately between $10.0 million and $18.0 million. Because our existing credit facility terminates on June 24, 2013, our ability to finance the repurchase of this Aircrane may depend on our ability to obtain new financing.

    On August 1, 2011, we entered into an Aircraft Lease and Purchase Option Agreement with HRT, which agreement was amended on October 11, 2011. Pursuant to the terms of the agreement, as amended, HRT has an option to purchase one Aircrane on or prior to January 15, 2012. If HRT does not exercise its purchase option, or does not otherwise purchase the Aircrane, there is a risk that we may fail to meet certain covenants under our Credit Agreement in 2012. See "—Our indebtedness could adversely affect our financial condition and impair our ability to operate our business."

Our expected growth and new obligations as a public company will require us to add additional personnel, infrastructure, and internal systems with which we have limited experience.

    Our management is continuing to implement enhancements to a number of our internal systems, including inventory administration, human resources, and internal controls. We believe that these enhancements will be necessary to support our expected growth as well as our new status as a public company. Following the closing of this offering, we will be subject to various requirements of the SEC and NASDAQ, including record keeping, financial reporting, and corporate governance rules and regulations. Our management team has limited experience in managing a public company. In addition, historically, we have not had some of the internal systems typically found in a public company. Implementing new systems and procedures is always challenging, and we are subject to the risk that our new systems will not function as anticipated or that we will initially fail to understand or properly administer them. Our business could be adversely affected if our internal infrastructure is inadequate to ensure compliance with federal, state, and local laws and regulations.

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Our business is subject to laws limiting ownership or control of aircraft companies, which may increase our costs and adversely affect us.

    Most of the countries in which we operate have laws requiring local ownership or control, or both, of certain kinds of companies that operate aircraft. We use various strategies to comply with these laws, including the formation of local subsidiaries that we do not wholly own and partnerships with local companies. FAA regulations may require that at least 75% of our voting securities be owned or controlled by United States citizens. The existence of these laws may restrict our operations; reduce our profit from, or control of, some foreign operations; or restrict the market for our securities.

Our production may be interrupted due to equipment failures or other events affecting our factories.

    Our manufacturing and testing processes depend on sophisticated and high-value equipment. Unexpected failures of this equipment could result in production delays, revenue loss, and significant repair costs. In addition, our factories rely on the availability of electrical power and natural gas, transportation for raw materials and finished product, and employee access to our workplace that are subject to interruption in the event of severe weather conditions or other natural or manmade events. While we maintain backup resources to the extent practicable, a severe or prolonged equipment outage or other interruptive event affecting areas where we have significant manufacturing operations may result in loss of manufacturing days or in shipping delays which could have a material adverse effect on our business.

General economic conditions and recent market events may expose us to new risks.

    Recent events in the financial markets and the economic downturn have contributed to severe volatility in the securities markets, a severe liquidity crisis in the global financial markets, and unprecedented government intervention. These conditions have affected our results of operations and may continue to affect them. In such an environment, significant additional risks may exist for us. The recent instability in the financial markets has led the U.S. Government to take a number of unprecedented actions designed to support certain financial and other institutions and segments of the financial market that have experienced extreme volatility, and in some cases, a lack of liquidity. There can be no assurance that this intervention will improve market conditions, that such conditions will not continue to deteriorate, or that further government intervention will or will not occur. For example, recently, general market volatility has been exacerbated by uncertainty about sovereign debt and the fear that countries such as Greece and Italy may default on their governments' financial obligations. If economic conditions continue or worsen, we face risks that may include:

•

declines in revenues and profitability from reduced or delayed orders by our customers, in particular with respect to infrastructure construction projects which may be delayed or cancelled;



•

supply problems associated with any financial constraints faced by our suppliers;



•

reductions in credit availability to us or in general;



•

increases in corporate tax rates to finance government spending programs; and



•

reductions in spending by governmental entities for services such as infrastructure construction and firefighting.

    The economic downturn and continued credit crisis and related turmoil in the global financial system may have an adverse impact on our business and our financial conditions. We cannot predict our ability to obtain financing due to the current credit crisis, and this could limit our ability to fund our future growth and operations. In addition, the creditworthiness of some of our customers may be affected, which may affect our ability to collect on our accounts receivable from such customers.

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Risks Related to this Offering

Our stock price may be volatile, and you may not be able to resell your shares at or above the initial offering price.

    There has been no public market for shares of our common stock. An active trading market for our shares may not develop or be sustained following the closing of this offering. The initial public offering price of our shares will be determined by negotiations between us and the representative of the underwriters. Our common stock may trade at a lower price upon the closing of this offering.

    The stock market has experienced significant price and volume fluctuations. After the offering, the market price for our shares may fluctuate significantly in response to a number of factors, some of which are beyond our control, including:

•

quarterly or annual variations in our operating results;



•

changes in financial estimates by securities analysts;



•

additions or departures of our key personnel;



•

the adoption of new laws or regulations that apply to our business; and



•

sales of shares of our common stock in the public markets.

    Fluctuations or decreases in the trading price of our common stock may adversely affect your ability to trade your shares. In the past, following periods of volatility in the market price of a company's securities, securities class action litigation has often been instituted. A securities class action suit against us could result in substantial costs and divert management's attention and resources that would otherwise be used to benefit the future performance of our operations. Such litigation expense may not be covered by insurance.

Within 180 days of the date of this offering, the outstanding shares of our common stock will become eligible for sale in the public market, which could cause the price of our common stock to decline.

    Our officers, our directors, and all of our stockholders have agreed with the representative of the underwriters not to sell or otherwise dispose of any of their shares for a period of 180 days after the date of this offering. When these lock-up agreements expire, the 7,405,436 outstanding shares held by our stockholders and approximately            shares underlying equity awards held by certain of our employees will become eligible for sale, in some cases subject only to the volume, manner of sale, and notice requirements of Rule 144 of the Securities Act of 1933, as amended (the "Securities Act "). Some of our stockholders have the right to require that we register their shares for public sale. See "Shares Eligible for Future Sale—Registration Rights." Sales of a substantial number of these shares in the public market after this offering, or the perception that these sales could occur, could cause the market price of our common stock to decline. In addition, the sale of these shares could impair our ability to raise capital through the sale of additional equity securities. See "Shares Eligible for Future Sale" for further discussion of the shares that will be freely tradable within 180 days after the date of this offering.

Existing stockholders will exert significant influence over us after the closing of this offering. Their interests may not coincide with yours, and they may make decisions with which you may disagree.

    After this offering, entities affiliated with ZM Equity Partners, LLC will own approximately        % of our outstanding common stock, and two of our directors are managing directors of Centre Lane Partners LLC, an affiliate of ZM Equity Partners. As a result, these stockholders, acting individually or together, could exert significant influence over all matters requiring stockholder approval, including the election of directors and approval of significant corporate transactions. In addition, this concentration of ownership may delay or prevent a change in control of our Company and make some transactions more difficult or impossible without the support of these stockholders. The interests of these stockholders may

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not always coincide with our interests as a company or the interest of other stockholders. Accordingly, these stockholders could cause us to enter into transactions or agreements that you would not approve or make decisions with which you may disagree.

As a new investor, you will experience immediate and substantial dilution in net tangible book value.

    Investors purchasing shares of our common stock in this offering will pay more for their shares than the amount paid by stockholders who acquired shares before this offering. If you purchase common stock in this offering, you will incur immediate dilution in pro forma net tangible book value of approximately $            per share. See "Dilution."

If securities or industry analysts do not publish research or publish inaccurate or unfavorable research about our business, our stock price and trading volume could decline.

    The trading market for our common stock will depend in part on the research and reports that we expect securities or industry analysts to publish about us or our business. If one or more of the analysts who cover us downgrade our stock or publish inaccurate or unfavorable research about our business, our stock price would likely decline. If one or more of these analysts cease coverage of us or fail to publish reports on us regularly, demand for our stock could decrease, which might cause our stock price and trading volume to decline.

Our management will continue to have broad discretion over the use of the proceeds we received in the offering and might not apply the proceeds in ways that increase the value of your investment.

    Our management will continue to have broad discretion to use the net proceeds we receive from the offering. We expect to use the net proceeds from the offering to manufacture Aircranes and related components, to pay down indebtedness under our revolving credit facility, and for working capital and other general corporate purposes, including the possible acquisition of additional aircraft to complement our fleet of Aircranes. We may also use a portion of the net proceeds for the acquisition of businesses, solutions, and technologies that we believe are complementary to our own. Our management retains the discretion, however, to use the proceeds differently if events we do not anticipate arise. Our management might not apply the net proceeds from the offering in ways that increase the value of our common stock. Until we use the net proceeds from the offering, we plan to invest them in short-term instruments, and these investments may not yield a favorable rate of return. If we do not invest or apply the net proceeds from the offering in ways that enhance stockholder value, we may fail to achieve expected financial results, which could cause our stock price to decline.

Provisions in our charter documents and Delaware law could discourage takeover attempts and lead to management entrenchment.

    Our second amended and restated certificate of incorporation and bylaws contain provisions that could have the effect of delaying or preventing changes in control or changes in our management without the consent of our board of directors. These provisions include:

•

a classified board of directors with three-year staggered terms, which may delay the ability of stockholders to change the membership of a majority of our board of directors;



•

no cumulative voting in the election of directors, which limits the ability of minority stockholders to elect director candidates;



•

the exclusive right of our board of directors to elect a director to fill a vacancy created by the expansion of the board of directors or the resignation, death, or removal of a director, which prevents stockholders from being able to fill vacancies on our board of directors;

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•

the ability of our board of directors to determine to issue shares of preferred stock and to determine the price and other terms of those shares, including preferences and voting rights, without stockholder approval, which could be used to significantly dilute the ownership of a hostile acquirer;



•

a prohibition on stockholder action by written consent, which forces stockholder action to be taken at an annual or special meeting of our stockholders;



•

the requirement that a special meeting of stockholders may be called only by the chairman of the board of directors, the chief executive officer, or the board of directors, which may delay the ability of our stockholders to force consideration of a proposal or to take action, including the removal of directors; and



•

advance notice procedures that stockholders must comply with in order to nominate candidates to our board of directors or to propose matters to be acted upon at a stockholders' meeting, which may discourage or deter a potential acquirer from conducting a solicitation of proxies to elect the acquirer's own slate of directors or from otherwise attempting to obtain control of us.

    We are also subject to certain anti-takeover provisions under Delaware law. Under Delaware law, a corporation may not, in general, engage in a business combination with any holder of 15% or more of its capital stock unless the holder has held the stock for three years or, among other things, the board of directors has approved the transaction.

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

    This prospectus includes forward-looking statements. In some instances, you can identify forward-looking statements by the words such as "believe," "may," "estimate," "continue," "anticipate," "intend," "plan," "expect," "predict," "potential," and similar expressions, as they relate to us, our business, and our management. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends affecting the financial condition of our business. Forward-looking statements should not be read as a guarantee of future performance or results, and will not necessarily be accurate indications of the times at, or by, which such performance or results will be achieved. Forward-looking statements are based on information available at the time those statements are made and/or management's good-faith belief as of that time with respect to future events, and are subject to risks and uncertainties that could cause actual performance or results to differ materially from those expressed in or suggested by the forward-looking statements. Important factors that could cause such differences include, but are not limited to:

•

our safety record and any related impact on our reputation;



•

our ability to meet our debt obligations;



•

the effects of increased competition in our business;



•

our ability to accurately forecast revenues, convert our backlog into revenues, and appropriately plan our expenses;



•

the impact of worldwide economic conditions, including the resulting effect on governmental budgets and capital investments by governmental and private entities;



•

changes in government regulation affecting our business;



•

the attraction and retention of qualified employees and key personnel;



•

our ability to effectively manage our growth;



•

our ability to keep pace with changes in technology and our competitors;



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our ability to successfully enter new markets, manage our international expansion, and expand and diversify our customer base;



•

our ability to expand and market our manufacturing and MRO services;



•

our ability to market our aerial services in new geographic areas and markets;



•

our ability to successfully manage any future acquisitions of businesses, solutions, or technologies;



•

the success of our marketing efforts;



•

the impact of fluctuations in currency exchange rates; and



•

other risk factors included under "Risk Factors" in this prospectus.

    The factors listed above are not exhaustive and new factors may emerge or changes to the foregoing factors may occur that could impact our business. In light of these risks and uncertainties, the forward-looking events and circumstances discussed in this prospectus may not occur and actual results could differ materially from those anticipated or implied in the forward-looking statements.

    Forward-looking statements speak only as of the date of this prospectus. You should not put undue reliance on any forward-looking statements. We assume no obligation to update forward-looking statements to reflect actual results, changes in assumptions, or changes in other factors affecting forward-looking information, except to the extent required by applicable laws. If we update one or more forward-looking statements, no inference should be drawn that we will make additional updates with respect to those or other forward-looking statements.

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USE OF PROCEEDS

    We estimate that we will receive net proceeds from the sale of shares of common stock in this offering of approximately $             million, assuming an initial public offering price of $            per share, after deducting underwriting discounts and commissions and estimated offering expenses. We intend to use the net proceeds of this offering as follows:

•

approximately $             million to manufacture Aircranes and related components;



•

approximately $             million to pay down indebtedness under our revolving credit facility, which will increase the amounts available for future borrowing under this facility;



•

approximately $             million to pay down our unsecured subordinated promissory notes; and



•

the remaining net proceeds for general corporate and working capital purposes, including possible acquisitions of additional aircraft or businesses to complement our aerial services and enhance our service offerings. We have had informal discussions about potential acquisitions of this nature but currently have no definitive agreements or understandings with respect to any of them.

    We anticipate that the actual allocation of our resources to the above or other uses will depend on the needs and opportunities that our management perceives at the time of allocation. For example, the amount allocated to the manufacture of Aircranes and related components represents management's current estimate based on its perceived needs and opportunities. The actual allocation of the net proceeds to this category may be greater or less the amount currently estimated based on changes in our opportunities and requirements for aircraft and components, the availability and price of airframes and other components or for other reasons that management does not currently anticipate.

    As of September 30, 2011, our total indebtedness, excluding letters of credit, was $122.0 million, consisting of $45.6 million borrowed under our revolving credit facility, $56.9 million borrowed under our term loan facility and $19.5 million borrowed under our unsecured subordinated promissory notes. At September 30, 2011, we had maximum availability for borrowings under our revolving credit facility of approximately $21.8 million. We issued $19.5 million of our unsecured subordinated promissory notes to provide for additional borrowing capacity under our revolving credit facility, recognizing that the proceeds of this offering were intended to be used to pay off the remaining amounts owed under the unsecured subordinated promissory notes. Under the terms of our revolving credit facility, we are prevented from paying down principal on the unsecured subordinated promissory notes unless such payments are made with the proceeds of this offering.

    At September 30, 2011, the interest rate on borrowings under our revolving credit facility, which terminates on June 24, 2013, was 3.90%, which was calculated based on the prime rate as quoted by Wells Fargo. As of September 30, 2011, there was $45.6 million outstanding under our revolving credit facility, not including letters of credit. Amounts under our revolving credit facility were borrowed within the prior year and used to refinance our prior senior debt and second lien debt and for general working capital purposes. At September 30, 2011, the interest rate under our unsecured subordinated promissory notes was 20.0%, which is payable in kind by increasing the principal amount of such notes and is payable quarterly, and the outstanding principal balance under the notes was $19.5 million, of which $8.5 million mature on June 30, 2015 and $11.0 million mature on June 30, 2016. For a description of the terms of our revolving credit facility and unsecured subordinated promissory notes see "Management's Discussion and Analysis of Financial Condition and Results of Operations—Description of Indebtedness."

    Pending use for general corporate purposes, we intend to invest the net proceeds in short-term, investment-grade, interest-bearing securities. See "Management's Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources" for additional information regarding our sources and uses of capital.

    We will not receive any proceeds from the sale of shares by the selling stockholders. Pursuant to a registration rights agreement, we are obligated to pay all expenses of the selling stockholders in connection with this offering except for underwriting discounts and commissions which will be paid by the selling stockholders. See "Principal and Selling Stockholders" and "Description of Capital Stock—Registration Rights."

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DIVIDEND POLICY

    We have never declared or paid, and do not anticipate declaring or paying, any cash dividends on our common stock. Instead, we currently anticipate that we will retain all of our future earnings, if any, to fund the operation and expansion of our business and to use as working capital and for other general corporate purposes. Any future determination as to the declaration and payment of dividends, if any, will be at the discretion of our board of directors and will depend on then existing conditions, including our financial condition, operating results, contractual restrictions, capital requirements, business prospects, and other factors our board of directors may deem relevant. Our existing credit facility limits our ability to declare and pay dividends.

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CAPITALIZATION

    The table below sets forth our cash and cash equivalents and our capitalization on a consolidated basis as of September 30, 2011:

•

on an actual basis;



•

on a pro forma basis after giving effect to the completion of our recapitalization, as discussed under "Explanatory Note Regarding Recapitalization"; and



•

on a pro forma as adjusted basis after giving effect to the sale of                        shares of our common stock offered by us in this offering (at an estimated initial public offering price of $            per share, the midpoint of the sale price range set forth on the cover of this prospectus) less the underwriting discount and estimated offering expenses, and the use of proceeds received by us from this offering as discussed under "Use of Proceeds."

    You should read the following table in conjunction with "Management's Discussion and Analysis of Financial Condition and Results of Operations" and our consolidated financial statements and the related notes included elsewhere in this prospectus.

(1)

See "Explanatory Note Regarding Recapitalization."

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DILUTION

    If you invest in our common stock, your interest will be diluted to the extent of the difference between the public offering price per share of our common stock and the pro forma net tangible book value per share of our common stock after this offering. Dilution results from the fact that the public offering price per share of our common stock is substantially in excess of net tangible book value per share attributable to existing stockholders for the presently outstanding stock. We calculate net tangible book value per share by dividing our net tangible book value, which equals total assets less intangible assets and total liabilities, by the number of shares outstanding.

    The discussion and tables below are based on 1,000 shares of our Class A common stock outstanding as of September 30, 2011 and also reflect the issuance of shares of common stock in the recapitalization. On this basis, our net tangible book value at September 30, 2011 was $            , or $            pro forma per share, based upon 8,049,387 shares outstanding.

    After giving effect to the sale of                        shares of common stock in this offering at a price of $            per share, the midpoint of the sale price range set forth on the cover of this prospectus, and after deducting the estimated underwriting discount and estimated offering expenses payable by us, our pro forma net tangible book value as of September 30, 2011 would have been approximately $             million, or $            per share. This represents an immediate increase in net tangible book value of $            per share to existing stockholders, and an immediate dilution in net tangible book value of $            per share to new investors, or approximately        % of the offering price of $            per share. The following table illustrates this dilution on a per share basis:

    The following table shows on a pro forma basis at September 30, 2011, after giving effect to the total cash consideration paid to us, the average price per share paid by existing stockholders and by new investors in this offering before deducting estimated underwriting discounts and estimated offering expenses payable by us.

    The above table excludes 643,951 shares of common stock reserved for issuance under our 2012 Stock Incentive Plan, which we intend to adopt prior to the closing of this offering, which includes the following shares of restricted stock, or rights to receive stock, that we intend to issue concurrently with this offering: (1)             shares of restricted stock to certain members of our management; (2) an estimated 17,500 shares of restricted stock to a broad base of our employees based on years of service with us; and (3) an estimated 7,500 shares of restricted stock to our independent directors. The estimated share amounts for employees and independent directors are based on the midpoint of the sale price range set forth on the cover of this prospectus. The actual number of shares to be awarded to employees and independent directors will be based on an aggregate dollar amount and will depend on the sale price of our common stock in this offering.

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SELECTED CONSOLIDATED FINANCIAL AND OTHER DATA

    The following tables set forth our selected consolidated financial and other data. We derived our selected consolidated financial and other data as of December 31, 2009, and 2010, and for the years ended December 31, 2008, 2009 and 2010 from our audited consolidated financial statements and notes thereto, which are included elsewhere in this prospectus. The balance sheet data as of December 31, 2008 has been derived from our audited consolidated financial statements which are not included in this prospectus.

    We derived our selected consolidated financial and other data as of September 30, 2011 and for the nine months ended September 30, 2010 and 2011 from our unaudited condensed consolidated financial statements and notes thereto, which are included elsewhere in the prospectus. These unaudited condensed consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements and, in the opinion of our management, include all adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation of the information set forth herein. Interim financial results are not necessarily indicative of results that may be expected for the full fiscal year or any future reporting period.

    All of our issued and outstanding common stock was acquired in a merger transaction on September 27, 2007. Although we continued as the same legal entity following the acquisition, in the table below we refer to periods ended on or prior to September 26, 2007 as "predecessor" periods. The predecessor period balance sheets reflect the historical accounting basis in our assets and liabilities, and the balance sheets subsequent to September 27, 2007 reflect the new basis in our assets and liabilities resulting from the acquisition, which altered the book value of our aircraft, property, plant and equipment, and aircraft support parts and has impacted our operating costs compared to the predecessor periods.

    We derived our selected consolidated financial and other data of the predecessor as of December 31, 2006 and for the period from January 1, 2007 through September 26, 2007, and for us as of December 31, 2007 and 2008 and for the period from September 27, 2007 through December 31, 2007 from audited consolidated financial statements and notes thereto, which are not included in this prospectus.

    Our selected consolidated financial and other data are not necessarily indicative of our future performance. The data provided in this table are only a summary and do not include all of the data contained in our financial statements. Accordingly, this table should be read in conjunction with, and is qualified in its entirety by, our consolidated financial statements and related notes contained elsewhere in this prospectus and the sections of this prospectus entitled, "Management's Discussion and Analysis of Financial Condition and Results of Operations" and "Capitalization."

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