Table of Contents NOTES TO CONSOLIDATED FINANCIAL STATEMENTS OF AMERICAN AIRLINES, INC. (d) Off-Balance Sheet Arrangements Aircraft and Engines Letters of Credit and Other (e) Legal Proceedings 193 Chapter 11 Cases . On November 29, 2011, AMR, American, and certain of AMR’s other direct and indirect domestic subsidiaries (the Debtors) filed voluntary petitions for relief under Chapter 11 of the United States Bankruptcy Code in the United States Bankruptcy Court for the Southern District of New York (the Bankruptcy Court). On October 21, 2013, the Bankruptcy Court entered an order approving and confirming the Debtors’ fourth amended joint plan of reorganization (as amended, the Plan). On the Effective Date, December 9, 2013, the Debtors consummated their reorganization pursuant to the Plan and completed the Merger. American provides financial assurance, such as letters of credit, surety bonds or restricted cash and investments, primarily to support projected workers’ compensation obligations and airport commitments. As of December 31, 2020, American had $476 million of letters of credit and surety bonds securing various obligations, of which $110 million is collateralized with American’s restricted cash. The letters of credit and surety bonds that are subject to expiration will expire on various dates through 2024. With respect to leveraged leases, American evaluated whether the leases had characteristics of a variable interest entity. American concluded the leasing entities met the criteria for variable interest entities; however, American concluded it is not the primary beneficiary under these leasing arrangements and accounts for the majority of its EETC leveraged lease financings as operating leases. American’s total future payments to the trusts of each of the relevant EETCs under these leveraged lease financings are $78 million as of December 31, 2020, which are reflected in the operating lease obligations in Note 4. Each trust covers a set number of aircraft or spare engines scheduled to be delivered, financed or refinanced upon the issuance of the EETC or within a specific period of time thereafter. At the time of each covered aircraft or spare engine financing, the relevant trust used the proceeds of the issuance of the EETC (which may have been available at the time of issuance thereof or held in escrow until financing of the applicable aircraft following its delivery) to purchase equipment notes relating to the financed aircraft or engines. The equipment notes are issued, at American’s election, in connection with a mortgage financing of the aircraft or spare engines or, in certain cases, by a separate owner trust in connection with a leveraged lease financing of the aircraft. In the case of a leveraged lease financing, the owner trust then leases the aircraft to American. In both cases, the equipment notes are secured by a security interest in the aircraft or engines, as applicable. The pass-through trust certificates are not direct obligations of, nor are they guaranteed by, AAG or American. However, in the case of mortgage financings, the equipment notes issued to the trusts are direct obligations of American and, in certain instances, have been guaranteed by AAG. As of December 31, 2020, $11.0 billion associated with these mortgage financings is reflected as debt in the accompanying consolidated balance sheet. American currently operates 350 owned aircraft and 24 leased aircraft, and owns 62 spare aircraft engines, which in each case were financed with EETCs issued by pass-through trusts. These trusts are off-balance sheet entities, the primary purpose of which is to finance the acquisition of flight equipment or to permit issuance of debt backed by existing flight equipment. In the case of aircraft EETCs, rather than finance each aircraft separately when such aircraft is purchased, delivered or refinanced, these trusts allow American to raise the financing for a number of aircraft at one time and, if applicable, place such funds in escrow pending a future purchase, delivery or refinancing of the relevant aircraft. Similarly, in the case of the spare engine EETCs, the trusts allow American to use its existing pool of spare engines to raise financing under a single facility. The trusts have also been structured to provide for certain credit enhancements, such as liquidity facilities to cover certain interest payments, that reduce the risks to the purchasers of the trust certificates and, as a result, reduce the cost of aircraft financing to American. As each phase is completed, the assets will be sold and transferred to LAWA, including the site improvements and non-proprietary improvements. As American controls the assets during construction, they are recognized on its balance sheet until legal title has transferred. As of December 31, 2020, American has incurred approximately $223 million in costs relating to the LAX modernization project, of which $114 million were incurred during 2020, and have been included within operating property and equipment on its consolidated balance sheet. As of December 31, 2020, American has sold and transferred $111 million of non-proprietary improvements to LAWA, all of which occurred during 2020.