Aircastle Limited (“Aircastle,” the “Company,” “we,” “us” or “our”) is a Bermuda exempted company that was incorporated on October 29, 2004 under the provisions of Section 14 of the Companies Act of 1981 of Bermuda. Aircastle’s business is investing in aviation assets, including acquiring, leasing, managing and selling commercial jet aircraft.

Aircastle is a holding company that conducts its business through subsidiaries. Aircastle directly or indirectly owns all of the outstanding common shares of its subsidiaries. The consolidated financial statements presented are prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). The Company manages, analyzes and reports on its business and results of operations on the basis of one operating segment: leasing, financing, selling and managing commercial flight equipment. Our chief executive officer is the chief operating decision maker.

On November 5, 2019, Aircastle entered into an Agreement and Plan of Merger (the “Merger Agreement”), with MM Air Limited, a Bermuda exempted company (“Parent”), and MM Air Merger Sub Limited, a Bermuda exempted company and wholly owned subsidiary of Parent (“Merger Sub”), pursuant to which, among other things, Merger Sub will merge with and into the Company, with Aircastle surviving as a wholly owned subsidiary of Parent (the “Merger”). Parent and Merger Sub are newly-formed entities controlled by affiliates of Marubeni Corporation (“Marubeni”) and Mizuho Leasing Company, Limited (“Mizuho Leasing”). The Marubeni Corporation is a related party and owns 28.8% of the Company’s outstanding common shares as of December 31, 2019.

Pursuant to the Merger Agreement, subject to certain conditions set forth therein, at the effective time of the Merger (the “Effective Time”), each issued and outstanding common share, par value $0.01 per share, of the Company (the “Common Shares”) (other than (i) shares to be canceled or converted into shares of the surviving company pursuant to the Merger Agreement and (ii) restricted shares to be canceled and exchanged pursuant to the Merger Agreement), shall be converted into the right to receive $32.00 in cash, without interest (the “Merger Consideration”).

Consummation of the Merger is subject to the satisfaction of certain remaining customary closing conditions, including, without limitation, (i) approval of the Merger Agreement and the transactions contemplated thereby by the affirmative votes of a majority of the votes cast by holders of outstanding Common Shares at a meeting of the Company’s shareholders; (ii) the receipt of any applicable pre-clearance or similar approval of certain remaining specified jurisdictions (i.e., Chile, Mexico and Morocco), and all required regulatory approvals being in full force and effect; (iii) the absence of any law, judgment or other legal restraint that prevents, makes illegal or prohibits the consummation of the Merger and the other transactions contemplated by the Merger Agreement; (iv) the accuracy of each party’s representations and warranties (subject to certain qualifications); (v) each party’s performance in all material respects of its obligations contained in the Merger Agreement; and (vi) the absence of a material adverse effect on the Company since the date of the Merger Agreement.

The Merger Agreement includes customary representations, warranties and covenants of Aircastle, Parent, and Merger Sub. Among other things, Aircastle has agreed to customary covenants regarding the operation of the business of Aircastle and its subsidiaries prior to the closing. Aircastle is permitted to pay regular quarterly dividends up to $0.32 per common share pursuant to the Merger Agreement. The Company currently anticipates that the Merger will close in the first half of calendar year 2020, subject to the satisfaction of the remaining customary closing conditions.

Effective January 1, 2019, the Company adopted Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 842, Leases (“ASC 842”) which, together with all subsequent amendments, replaced the existing guidance in ASC 840, Leases (“ASC 840”). The accounting for leases by lessors remained largely unchanged from the concepts that existed in ASC 840. The FASB decided that lessors would be precluded from recognizing selling profit and revenue at lease commencement for any sales-type or direct financing lease that does not transfer control of the underlying asset to the lessee. This requirement aligns the notion of what constitutes a sale in the lessor accounting guidance with that in the revenue recognition standard, which evaluates whether a sale has occurred from the customer’s perspective.

As a result of the Company’s adoption of ASC 842, we recognized right-of-use assets and lease liabilities on our Consolidated Balance Sheet as of December 31, 2019, for our office leases classified as operating leases under ASC 842, existing at, or entered into after, January 1, 2019. We adopted the standard using the required “modified retrospective”

approach and the available practical expedients. ASC 842 requires collections on direct financing and sales-type leases to be reported within operating activities on our Consolidated Statement of Cash Flows for the year ended December 31, 2019. Our financial statements for comparative periods have not been adjusted and continue to be reported in accordance with ASC 840. The standard did not have a material impact on our consolidated financial statements and related disclosures.

We consolidate VIEs in which we have determined that we are the primary beneficiary. We use judgment when deciding (a) whether an entity is subject to consolidation as a VIE, (b) who the variable interest holders are, (c) the potential expected losses and residual returns of the variable interest holders, and (d) which variable interest holder is the primary beneficiary. When determining which enterprise is the primary beneficiary, we consider (1) the entity’s purpose and design, (2) which variable interest holder has the power to direct the activities that most significantly impact the entity’s economic performance, and (3) the obligation to absorb losses of the entity or the right to receive benefits from the entity that could potentially be significant to the VIE. When certain events occur, we reconsider whether we are the primary beneficiary of VIEs. We do not reconsider whether we are a primary beneficiary solely because of operating losses incurred by an entity.

In the normal course of business, Aircastle encounters several significant types of economic risk including credit, market, aviation industry and capital market risks. Credit risk is the risk of a lessee’s inability or unwillingness to make contractually required payments and to fulfill its other contractual obligations. Market risk reflects the change in the value of financings due to changes in interest rate spreads or other market factors, including the value of collateral underlying financings. Aviation industry risk is the risk of a downturn in the commercial aviation industry which could adversely impact a lessee’s ability to make payments, increase the risk of unscheduled lease terminations and depress lease rates and the value of the Company’s aircraft. Capital market risk is the risk that the Company is unable to obtain capital at reasonable rates to fund the growth of our business or to refinance existing debt facilities.

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. While Aircastle believes that the estimates and related assumptions used in the preparation of the consolidated financial statements are appropriate, actual results could differ from those estimates.

Flight equipment held for lease is stated at cost and depreciated using the straight-line method, typically over a 25-year life from the date of manufacture for passenger aircraft and over a 30 to 35-year life for freighter aircraft, depending on whether the aircraft is a converted or purpose-built freighter, to estimated residual values. Estimated residual values are generally determined to be approximately 15% of the manufacturer’s estimated realized price for passenger aircraft when new and 5% to 10% for freighter aircraft when new. Management may make exceptions to this policy on a case-by-case basis when, in its judgment, the residual value calculated pursuant to this policy does not appear to reflect current expectations of value. Examples of situations where exceptions may arise include but are not limited to:

For planned major maintenance activities for aircraft off-lease, the Company capitalizes the actual maintenance costs by applying the deferral method. Under the deferral method, we capitalize the actual cost of major maintenance events, which are depreciated on a straight-line basis over the period until the next maintenance event is required.

In accounting for flight equipment held for lease, we make estimates about the expected useful lives, the fair value of attached leases, acquired maintenance assets or liabilities and the estimated residual values. In making these estimates, we rely upon actual industry experience with the same or similar aircraft types and our anticipated lessee’s utilization of the aircraft.

When we acquire an aircraft with a lease, determining the fair value of attached leases requires us to make assumptions regarding the current fair values of leases for specific aircraft. We estimate a range of current lease rates of like aircraft in order to determine if the attached lease is within a fair value range. If a lease is below or above the range of current lease rates, we present value the estimated amount below or above the fair value range over the remaining term of the lease. The resulting lease discount or premium is amortized into lease rental income over the remaining term of the lease.

We perform a recoverability assessment of all aircraft in our fleet, on an aircraft-by-aircraft basis annually during the second quarter. In addition, a recoverability assessment is performed whenever events or changes in circumstances, or indicators, suggest that the carrying amount or net book value of an asset may not be recoverable. Indicators may include, but are not limited to, a significant lease restructuring or early lease termination, significant change in aircraft model’s storage levels, the introduction of newer technology aircraft or engines, an aircraft type is no longer in production or a significant airworthiness directive is issued. When we perform a recoverability assessment, we measure whether the estimated future undiscounted net cash flows expected to be generated by the aircraft exceed its net book value. The undiscounted cash flows consist of cash flows from currently contracted lease rental and maintenance payments, future projected lease rates, transition costs, estimated down time, estimated residual or scrap values for an aircraft, economic conditions and other factors. In the event that an aircraft does not meet the recoverability test, the aircraft will be adjusted to fair value, resulting in an impairment charge. See Note 2 — Fair Value Measurements.

Management develops the assumptions used in the recoverability analysis based on current and future expectations of the global demand for a particular aircraft type and historical experience in the aircraft leasing market and aviation industry, as well as information received from third party industry sources. The factors considered in estimating the undiscounted

In monitoring the aircraft in our fleet for impairment charges, we identify those aircraft that are most susceptible to failing the recoverability assessment and monitor those aircraft more closely, which may result in more frequent recoverability assessments. The recoverability in the value of these aircraft is more sensitive to changes in contractual cash flows, future cash flow estimates and residual values or scrap values for each aircraft. These are typically older aircraft for which lessee demand is declining.

If a lease meets specific criteria at lease commencement or at the effective date of a lease modification, we recognize the lease as a direct financing or sales-type lease. The net investment in direct financing and sales-type leases consists of the lease receivable, estimated unguaranteed residual value of the leased flight equipment at lease-end and, for direct financing leases, deferred selling profit. For sales-type leases, we recognize the difference between the net book value of the aircraft and the net investment in the lease as a gain or loss on sale of fight equipment. Selling profit on a direct financing lease is deferred and amortized over the lease term, and a selling loss is recognized at lease commencement. Interest income on our net investment in leases is recognized as Direct financing and sales-type lease revenue over the lease term in a manner that produces a constant rate of return on the net investment in the lease.

Collectability of direct financing and sales-type leases is evaluated at lease commencement and periodically during the lease term. The evaluation is performed at an individual customer level and, among other things, considers the credit of the lessee and the value of the underlying aircraft. A loss allowance is established if there is evidence that we will be unable to collect all amounts due according to the contractual terms of the lease. At December 31, 2019, we had no allowance for credit losses for our Net investment in direct financing and sales-type leases.

Aircastle accounts for its interest in an unconsolidated joint venture using the equity method as we do not control the joint venture entity. Under the equity method, the investment is initially recorded at cost and the carrying amount is affected by its share of the unconsolidated joint venture’s undistributed earnings and losses, and distributions of dividends and capital. The investment may also reflect an equity loss in the event that circumstances indicate an other-than-temporary impairment.

Most of our operating leases require the lessee to pay Aircastle a security deposit or provide a letter of credit. Security deposits represent cash received from the lessee that is held on deposit until lease expiration. Aircastle’s operating leases also obligate the lessees to maintain flight equipment and comply with all governmental requirements applicable to the flight equipment, including without limitation, operational, maintenance, registration requirements and airworthiness directives.

Typically, under an operating lease, the lessee is responsible for performing all maintenance but they may also be required to make payments to us for heavy maintenance, overhaul or replacement of certain high-value components of the aircraft. These maintenance payments are based on hours or cycles of utilization or on calendar time, depending upon the component, and are required to be made monthly in arrears or at the end of the lease term. Whether to permit a lessee to make maintenance payments at the end of the lease term, rather than requiring such payments to be made monthly, depends on a variety of factors, including the creditworthiness of the lessee, the level of security deposit which may be provided by the lessee and market conditions at the time we enter into the lease. If a lease requires monthly maintenance payments, we would typically be obligated to reimburse the lessee for costs they incur for heavy maintenance, overhaul or replacement of certain high-value components to the extent of maintenance payments received in respect of the specific maintenance event, usually shortly following completion of the relevant work. If a lease requires end of lease term maintenance payments, typically the lessee would be required to pay us for its utilization of the aircraft during the lease; however, in some cases, we may owe a net payment to the lessee in the event heavy maintenance is performed and paid for by the lessee during the lease term and the aircraft is returned to us in better condition than at lease inception.

We record monthly maintenance payments by the lessee as accrued maintenance payments liabilities in recognition of our contractual commitment to refund such receipts. In these contracts, we typically do not recognize such maintenance payments as maintenance revenue during the lease. Reimbursements to the lessee upon the receipt of evidence of qualifying maintenance work are charged against the existing accrued maintenance payments liability. We currently defer maintenance revenue recognition of most monthly maintenance payments collected until the end of the lease, when we are able to determine the amount, if any, by which the monthly maintenance payments received from a lessee exceed costs to be incurred by that lessee in performing heavy maintenance. End of lease term maintenance payments made to us are recognized as maintenance revenue, and end of lease term maintenance payments we make to a lessee are recorded as contra maintenance revenue.

Many of our leases contain provisions which may require us to pay a portion of the lessee’s costs for heavy maintenance, overhaul or replacement of certain high-value components. We account for these expected payments as lease incentives, which are amortized as a reduction of revenue over the life of the lease. We estimate the amount of our portion for such costs, typically for the first major maintenance event for the airframe, engines, landing gear and auxiliary power units, expected to be paid to the lessee based on assumed utilization of the related aircraft by the lessee, the anticipated amount of the maintenance event cost and the estimated amounts the lessee is responsible to pay. The assumptions supporting these estimates are re-evaluated annually.

This estimated lease incentive is not recognized as a lease incentive liability at the inception of the lease. We recognize the lease incentive as a reduction of lease revenue on a straight-line basis over the life of the lease, with the offset being recorded as a lease incentive liability which is included in maintenance payments on the balance sheet. The payment to the lessee for the lease incentive liability is first recorded against the lease incentive liability, and any excess above the lease incentive liability is recorded as a prepaid lease incentive asset, which is included in other assets on the balance sheet and continues to amortize over the remaining life of the lease.

Aircastle uses an asset and liability based approach in accounting for income taxes. Deferred income tax assets and liabilities are recognized for the future tax consequences attributed to differences between the financial statement and tax basis of existing assets and liabilities using enacted rates applicable to the periods in which the differences are expected to affect taxable income. A valuation allowance is established, when necessary, to reduce deferred tax assets to the amount estimated by us to be realizable. The Company recognizes the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities. We did not have any unrecognized tax benefits.

We lease flight equipment under net operating leases with lease terms typically ranging from three to seven years. We generally do not offer renewal terms or purchase options in our leases, although certain of our operating leases allow the lessee the option to extend the lease for an additional term. Operating leases with fixed rentals and step rentals are recognized on a straight-line basis over the term of the initial lease, assuming no renewals. Operating lease rentals that adjust based on a London Interbank Offered Rate (“LIBOR”) index are recognized on a straight-line basis over the lease term using the prevailing rate at lease commencement. Changes to rate-based lease rentals are recognized in the statements of income in the period of change. Revenue is not recognized when collection is not reasonably assured. When collectability is not probable, the customer is placed on non-accrual status, and revenue is recognized when cash payments are received.

Aircastle recognizes compensation cost relating to share-based payment transactions in the financial statements based on the fair value of the equity instruments issued. Aircastle uses the straight-line method of accounting for compensation cost on share-based payment awards that contain pro-rata vesting provisions.

In June 2016, the FASB issued Accounting Standards Update (“ASU”) No. 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments and related updates. The standard affects entities holding financial assets and net investments in leases that are not accounted for at fair value through net income. The amendments affect loans, debt securities, trade receivables, net investments in leases, off-balance-sheet credit exposures, reinsurance receivables, and any other financial assets not excluded from the scope that have the contractual right to receive cash. The standard takes effect for annual periods beginning after December 15, 2019. The Company’s net investments in direct financing and sales-type leases compose the financial assets principally affected by the standard. Operating lease receivables are not within the scope of ASC 326.

Upon the Company’s adoption of ASC 326 in 2020, our net investments in direct financing and sales-type leases will be recorded in the consolidated financial statements net of an allowance for credit losses. This allowance for credit losses will reflect the Company’s estimate of lessee default probabilities and loss given default percentages. This estimate of expected credit losses will consider relevant information about past events, current conditions, and reasonable and supportable forecasts that affect the collectability of reported amounts. Additional consideration will be given for potential non-credit losses to unguaranteed residual values. We will adopt the standard using the “modified retrospective” approach with a January 1, 2020 adjustment to the opening balance of retained earnings. The adoption of the standard will not have a material impact on our consolidated financial statements or related disclosures.

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820), Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement. The standard modifies certain disclosure requirements for fair value measurements as part of its disclosure framework project. The standard is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. The adoption of the standard will not have a material impact on our consolidated financial statements or related disclosures.

In August 2018, the FASB issued ASU No. 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40), Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract. The standard requires a customer in a cloud computing arrangement that is a service contract to follow the internal-use-software guidance in ASC 350-40 to determine which implementation costs to capitalize as assets or expense as incurred. The standard is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted, including adoption in any interim period. The adoption of the standard will not have a material impact on our consolidated financial statements or related disclosures.

In October 2018, the FASB issued ASU No. 2018-17, Consolidation (Topic 810), Targeted Improvements to Related Party Guidance for Variable Interest Entities. The standard changes how all entities evaluate decision-making fees under the variable interest entity guidance. The standard is applied retrospectively with a cumulative-effect adjustment to retained earnings at the beginning of the earliest period presented. The standard is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. The adoption of the standard will not have a material impact on our consolidated financial statements or related disclosures.