================================================================================ ATA HOLDINGS CORP. 9 5/8% SENIOR NOTES DUE 2005 ---------- THIRD SUPPLEMENTAL INDENTURE DATED AS OF JANUARY 30, 2004 ---------- WELLS FARGO BANK NORTHWEST, NATIONAL ASSOCIATION as Trustee ================================================================================ THIRD SUPPLEMENTAL INDENTURE, dated as of January 30, 2004, among ATA HOLDINGS CORP. (formerly known as Amtran, Inc.) (the "Company"), ATA Airlines, Inc. (formerly known as American Trans Air, Inc.), Ambassadair Travel Club, Inc., ATA Leisure Corp. (formerly known as ATA Vacations, Inc.), Amber Travel, Inc., American Trans Air Training Corporation, American Trans Air ExecuJet, Inc. (each, an Indiana corporation), ATA Cargo, Inc. (formerly Amber Air Freight Corporation) (a California corporation) (the "Original Guarantors") and Chicago Express Airlines, Inc., a Georgia corporation ("Chicago Express" and together with the Original Guarantors, the "Guarantors"), as guarantors and WELLS FARGO BANK NORTHWEST, NATIONAL ASSOCIATION (formerly known as First Security Bank, N.A.), a national banking association (the "Trustee"). WHEREAS, the Company, the Original Guarantors and the Trustee are parties to an Indenture and a First Supplemental Indenture, each dated as of December 11, 1998 (collectively, the "Indenture"), pursuant to which the Company issued its 9 5/8% Senior Notes Due 2005 (the "2005 Notes"); and WHEREAS, the Company, the Guarantors and the Trustee are parties to a Second Supplemental Indenture, dated as of January 21, 2004, pursuant to which Chicago Express was made a Guarantor under the Indenture; WHEREAS, the Board of Directors of the Company has determined that it is in the best interests of the Company to authorize and approve certain amendments (the "Proposed Amendments") to the Indenture; WHEREAS, Section 9.02 of the Indenture provides that the Company, the Guarantors and the Trustee may amend the Indenture and the 2005 Notes with the written consent of the Holders of at least a majority in principal amount of the 2005 Notes then outstanding. WHEREAS, the Company has distributed an offering memorandum (the "offering memorandum") and accompanying consent and letter of transmittal, each dated January 9, 2004, to the Holders of the 2005 Notes in connection with the Proposed Amendments as described in the offering memorandum; WHEREAS, the Holders of a majority in principal amount of the 2005 Notes outstanding have approved the Proposed Amendments to the provisions of the Indenture; WHEREAS, the execution and delivery of this instrument have been duly authorized and all conditions and requirements necessary to make this instrument a valid and binding agreement have been duly performed and complied with; NOW, THEREFORE, for and in consideration of the premises and other good and valuable consideration, receipt and sufficiency of which are hereby acknowledged, it is mutually covenanted and agreed, for the equal proportionate benefit of all Holders of the 2005 Notes, as follows: ARTICLE 1 DELETION OF CERTAIN COVENANTS Each of Section 10.05 (Limitation on Indebtedness), Section 10.06 (Limitation on Restricted Payments), Section 10.07 (Limitation on Dividend and Other Payment Restrictions Affecting Restricted Subsidiaries), Section 10.08 (Limitation on the Issuance and Sale of Capital Stock of Restricted Subsidiaries), Section 10.09 (Limitation on Issuances of Guarantees by Restricted Subsidiaries), Section 10.10 (Limitation on Transactions with Shareholders and Affiliates), Section 10.11 (Limitation on Liens), Section 10.12 (Limitation on Sale-Leaseback Transactions), Section 10.13 (Limitation on Asset Sales), Section 10.14 (Repurchase of 9 5/8% Notes Upon a Change of Control), Section 10.15 (Existence), Section 10.16 (Payment of Taxes and Other Claims) and Section 10.17 (Maintenance of Properties and Insurance) of the Indenture (collectively, together with Section 8.01 and Sections 5.01(c) through Section 5.01(h) of the Indenture, the "Designated Provisions") is hereby deleted in its entirety and replaced with "Intentionally Omitted". ARTICLE 2 AMENDMENT OF SECTION 8.01 Each of paragraphs (iii), (iv) and (v) of Section 8.01 (Consolidation, Merger, Conveyance or Transfer on Certain Terms) of the Indenture is hereby deleted in its entirety. ARTICLE 3 ELIMINATION OF CERTAIN EVENTS OF DEFAULT Notwithstanding any provision in the Indenture to the contrary, each of paragraphs (c), (d), (e), (f), (g) and (h) of Section 5.01 (Events of Default) of the Indenture is hereby deleted in its entirety. ARTICLE 4 DELETION OF CERTAIN DEFINITIONS Notwithstanding any provision in the Indenture to the contrary, the definition in the Indenture of each capitalized term which occurs only within the Designated Provisions as in effect prior to the execution of this Third Supplemental Indenture shall be deleted from the Indenture and shall be of no force or effect. ARTICLE 5 MISCELLANEOUS SECTION 5.01. The Trustee accepts the trusts created by the Indenture, as supplemented by this Third Supplemental Indenture, and agrees to perform the same upon the terms and conditions of the Indenture, as supplemented by this Third Supplemental Indenture. SECTION 5.02. All capitalized terms used and not defined herein shall have the respective meanings assigned to them in the Indenture. SECTION 5.03. Each of the Company, the Guarantors and the Trustee hereby confirms and reaffirms the Indenture in every particular except as amended by this Third Supplemental Indenture. SECTION 5.04. All covenants and agreements in this Third Supplemental Indenture by the Company or the Trustee shall bind their respective successors and assigns, whether so expressed or not. SECTION 5.05. In case any provisions in this Third Supplemental Indenture shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby. SECTION 5.06. Nothing in this Third Supplemental Indenture, express or implied, shall give to any Person, other than the parties hereto and their successors under the Indenture and the Holders of the 2005 Notes, any benefit or any legal or equitable right, remedy or claim under the Indenture. SECTION 5.07. The parties may sign any number of copies of this Third Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. One signed copy is enough to prove this Third Supplemental Indenture. SECTION 5.08. This Third Supplemental Indenture shall be governed by, and construed in accordance with, the laws of the State of New York but without giving effect to applicable principles of conflicts of law to the extent that the application of the laws of another jurisdiction would be required thereby. SECTION 5.09. All provisions of this Third Supplemental Indenture shall be deemed to be incorporated in, and made a part of, the Indenture; and the Indenture, as supplemented by this Third Supplemental Indenture, shall be read, taken and construed as one and the same instrument. SECTION 5.10. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Third Supplemental Indenture or for or in respect of the recitals contained herein, all of which are made solely by the Company. 2 IN WITNESS WHEREOF, the parties have caused this Third Supplemental Indenture to be duly executed as of the date first written above. ATA HOLDINGS CORP. By /s/ David Wing ------------------------------------- Name: David M. Wing Title: Executive Vice Presicent & CFO ATA AIRLINES, INC. By /s/ David Wing ------------------------------------- Name: David M. Wing Title: Executive Vice President & CFO AMBASSADAIR TRAVEL CLUB, INC. By /s/ David Wing ------------------------------------- Name: David M. Wing Title: Executive Vice President & CFO ATA LEISURE CORP. By /s/ David Wing ------------------------------------- Name: David M. Wing Title: Executive Vice President & CFO AMBER TRAVEL, INC. By /s/ David Wing ------------------------------------- Name: David M. Wing Title: Executive Vice President & CFO AMERICAN TRANS AIR TRAINING CORP. By /s/ David Wing ------------------------------------- Name: David M. Wing Title: Executive Vice President & CFO AMERICAN TRANS AIR EXECUJET, INC. By /s/ David Wing ------------------------------------- Name: David M. Wing Title: Executive Vice President & CFO ATA CARGO, INC. By /s/ David Wing ------------------------------------- Name: David M. Wing Title: Executive Vice President & CFO CHICAGO EXPRESS AIRLINES, INC. By /s/ George Mikelsons ------------------------------------- Name: J. George Mikelsons Title: Chairman, President & CEO 3 WELLS FARGO BANK NORTHWEST, NATIONAL ASSOCIATION, as Trustee By /s/ Michael Hoggan ------------------------------------- Name: Michael D. Hoggan Title: Vice President 4