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                        ESCROW AND PAYING AGENT AGREEMENT
                                    (Class B)

                           Dated as of March 28, 2002

                                      among

                WELLS FARGO BANK NORTHWEST, NATIONAL ASSOCIATION,

                                 as Escrow Agent

                             PK AIRFINANCE US, INC.

                                  as Purchaser

                            WILMINGTON TRUST COMPANY,
                         not in its individual capacity,
                       but solely as Pass Through Trustee
                              for and on behalf of
                  American Trans Air 2002-1B Pass Through Trust

                             as Pass Through Trustee

                                       and

                            WILMINGTON TRUST COMPANY,

                                 as Paying Agent

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                  ESCROW AND PAYING AGENT AGREEMENT (Class B) dated as of March
28, 2002 (as amended, modified or supplemented from time to time, this
"Agreement") among WELLS FARGO BANK NORTHWEST, NATIONAL ASSOCIATION, a national
banking association, as Escrow Agent (in such capacity, together with its
successors in such capacity, the "Escrow Agent"); PK AIRFINANCE US, INC. (the
"Purchaser", and together with its transferees and assigns as registered owners
of the Certificates referred to below, the "Investors"); WILMINGTON TRUST
COMPANY, a Delaware banking corporation, not in its individual capacity but
solely as trustee (in such capacity, together with its successors in such
capacity, the "Pass Through Trustee") under the Pass Through Trust Agreement
referred to below; and WILMINGTON TRUST COMPANY, a Delaware banking corporation,
as paying agent hereunder (in such capacity, together with its successors in
such capacity, the "Paying Agent").

                               W I T N E S S E T H
                               -------------------

                  WHEREAS, American Trans Air, Inc. ("ATA"), Amtran, Inc.
("Amtran") and the Pass Through Trustee have entered into a Pass Through Trust
Agreement, dated as of the date hereof (as amended, modified or supplemented
from time to time in accordance with the terms thereof, the "Pass Through Trust
Agreement") relating to American Trans Air 2002-1B Pass Through Trust (the "Pass
Through Trust") pursuant to which the American Trans Air Pass Through Trust,
Series 2002-1B Certificates (the "Certificates") are being issued;

                  WHEREAS, ATA, the Pass Through Trustee and certain other
persons concurrently herewith are entering into the Note Purchase Agreement,
dated as of the date hereof (as amended, modified or supplemented from time to
time in accordance with the terms thereof, the "Note Purchase Agreement"),
pursuant to which the Pass Through Trustee has agreed to acquire from time to
time on or prior to the Delivery Period Termination Date (as defined in the Note
Purchase Agreement) equipment notes (the "Equipment Notes") issued to finance
the acquisition of Aircraft (as defined in the Note Purchase Agreement) by ATA,
as lessee or as owner, utilizing a portion of the proceeds from the sale of the
Certificates (the "Net Proceeds");

                  WHEREAS, the Purchaser and the Pass Through Trustee intend
that the Net Proceeds be held in escrow by the Escrow Agent on behalf of the
Investors, subject to withdrawal upon request by the Pass Through Trustee and
satisfaction of the conditions set forth in the Note Purchase Agreement for the
purpose of purchasing Equipment Notes, and that pending such withdrawal (i) the
Net Proceeds from the sale of the Certificates on the date hereof be deposited
on behalf of the Escrow Agent with IntesaBci S.p.A., acting through its New York
Branch, as Depositary (the "Depositary", which shall also be deemed to refer to
any Replacement Depositary (as defined in the Note Purchase Agreement) from and
after the date on which the Deposits (as defined in the Deposit Agreement) are
transferred to such Replacement Depositary) under the Deposit Agreement (Class
B), dated as of the date hereof between the Depositary and the Escrow Agent
relating to the Pass Through Trust (as amended, modified or supplemented from
time to time in accordance with the terms thereof, the "Initial Deposit
Agreement") and (ii) the Net Proceeds from the sale of the Certificates on the
Delayed Funding Date (as defined in the

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Delayed Funding Implementation Agreement) be deposited on behalf of the Escrow
Agent with the Depositary under the Delayed Deposit Agreement (Class B) dated as
of the date hereof between the Depositary and the Escrow Agent relating to the
Pass Through Trust (as amended, modified or supplemented from time to time in
accordance with the terms thereto), the "Delayed Deposit Agreement"). As used
herein, the term "Deposit Agreement" shall mean, prior to the Delayed Funding
Date, the Initial Deposit Agreement, and on and after the Delayed Funding Date,
the Initial Deposit Agreement (to the extent of any payment to be made by the
Depositary thereunder on or after the Delayed Funding Date) and the Delayed
Deposit Agreement. The terms "Initial Deposit Agreement" and "Delayed Deposit
Agreement" shall be deemed to refer to any Replacement Deposit Agreement (as
defined in the Note Purchase Agreement) to which the Escrow Agent becomes a
party pursuant to Section 1.02(a) hereof from and after the transfer of the
Deposits from the Depositary to the Replacement Depositary) pursuant to which,
among other things, the Depositary will pay interest for distribution to the
Investors and establish accounts from which the Escrow Agent shall make
withdrawals upon the request of and proper certification by the Pass Through
Trustee;

                  WHEREAS, ATA, Amtran, the Pass Through Trustee, the Escrow
Agent, the Paying Agent and certain other parties concurrently herewith are
entering into a Delayed Funding Implementation Agreement dated as of the date
hereof (as amended, supplemented or otherwise modified from time to time, the
"Delayed Funding Implementation Agreement") pursuant to which the parties
thereto agree to supplement and modify the Operative Agreements, as defined
therein;

                  WHEREAS, the Escrow Agent wishes to appoint the Paying Agent
to pay amounts required to be distributed to the Investors in accordance with
this Agreement; and

                  WHEREAS, capitalized terms used but not defined herein shall
have the meanings ascribed to such terms in the Pass Through Trust Agreement.

                  NOW, THEREFORE, in consideration of the obligations contained
herein, and for other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the parties hereto hereby agree as
follows:

                  SECTION 1. Escrow Agent.

                  Section 1.01. Appointment of Escrow Agent. The Purchaser
hereby irrevocably appoints, authorizes and directs the Escrow Agent to act as
escrow agent and fiduciary hereunder and under the Deposit Agreement for such
specific purposes and with such powers as are specifically delegated to the
Escrow Agent by the terms of this Agreement, together with such other powers as
are reasonably incidental thereto. Any and all monies received and held by the
Escrow Agent under this Agreement or the Deposit Agreement shall be held in
trust by the Escrow Agent in accordance with the terms of this Agreement. This
Agreement is irrevocable and the Investors' rights with respect to any monies
received and held in trust by the Escrow Agent under this Agreement or the
Deposit Agreement shall only be as provided under the terms and conditions of
this Agreement and the Deposit Agreement. The Escrow Agent (which term as used
in this sentence shall include reference to its affiliates and its own and its
affiliates' officers, directors, employees and agents): (a) shall have no duties
or responsibilities except those

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expressly set forth in this Agreement and the Deposit Agreement; (b) shall not
be responsible to the Pass Through Trustee or the Investors for any recitals,
statements, representations or warranties of any person other then itself
contained in this Agreement or the Deposit Agreement or for the failure by the
Pass Through Trustee, the Investors, the Paying Agent or any other person or
entity (other than the Escrow Agent) to perform any of its obligations hereunder
(whether or not the Escrow Agent shall have any knowledge thereof); and (c)
shall not be responsible for any action taken or omitted to be taken by it
hereunder or provided for herein or in connection herewith, except for its own
willful misconduct or gross negligence (or simple negligence in connection with
the handling of funds).

                  Section 1.02. Instruction; Etc. The Purchaser hereby
irrevocably directs the establishment of an escrow and accordingly instructs the
Escrow Agent, and the Escrow Agent agrees, (a) to enter into the Initial Deposit
Agreement and the Delayed Deposit Agreement and, if requested by ATA pursuant to
Section 4(a)(vii) of the Note Purchase Agreement, to enter into a Replacement
Deposit Agreement with the Replacement Depositary specified by the Company, (b)
to appoint the Paying Agent as provided for in this Agreement, (c) upon receipt
at any time and from time to time prior to the Termination Date (as defined
below) of a certificate substantially in the form of Exhibit B hereto (a
"Withdrawal Certificate") executed by the Pass Through Trustee, together with an
attached Notice of Purchase Withdrawal in substantially the form of Exhibit A to
the Deposit Agreement duly completed by the Pass Through Trustee (the
"Applicable Notice of Purchase Withdrawal" and the withdrawal to which it
relates, a "Purchase Withdrawal"), immediately to execute the Applicable Notice
of Purchase Withdrawal as Escrow Agent and transmit it to the Depositary by
facsimile transmission in accordance with the Deposit Agreement; provided that,
upon the request of the Pass Through Trustee after such transmission, the Escrow
Agent shall cancel such Applicable Notice of Purchase Withdrawal, (d) upon
receipt at any time and from time to time prior to the Delivery Period
Termination Date of a certificate substantially in the form of Exhibit C hereto
(a "Prepayment Withdrawal Certificate") executed by the Pass Through Trustee,
together with an attached Notice of Prepayment Withdrawal in substantially the
form of Exhibit D to the Deposit Agreement duly completed by the Pass Through
Trustee (the "Applicable Notice of Prepayment Withdrawal" and the withdrawal to
which it relates, a "Prepayment Withdrawal"), immediately to execute the
Applicable Notice of Prepayment Withdrawal as Escrow Agent and transmit it to
the Depositary by facsimile transmission in accordance with the Deposit
Agreement; provided that, upon the request of the Pass Through Trustee after
such transmission, the Escrow Agent shall cancel such Applicable Notice of
Prepayment Withdrawal, and (e) upon receipt of a Withdrawal Certificate executed
by the Pass Through Trustee, together with an attached Notice of Replacement
Withdrawal in substantially the form of Exhibit C to the Deposit Agreement duly
completed by the Pass Through Trustee, to (i) give such Notice of Replacement
Withdrawal to the Depositary requesting a withdrawal, on the date specified in
such notice, which shall not be less than 15 days after such notice is given
(the "Replacement Withdrawal Date"), of all Deposits then held by the Depositary
together with, if the Replacement Withdrawal Date occurs on a Regular
Distribution Date, all accrued and unpaid interest on such Deposits to but
excluding the Replacement Withdrawal Date, and (ii) direct the Depositary to
transfer such Deposits on behalf of the Escrow Agent to the Replacement
Depositary in accordance with the Replacement Deposit Agreement and (f) if there
are any undrawn Deposits on the "Termination Date", which shall mean the earlier
of (i) September 29, 2002 and (ii) the day on which the Escrow Agent receives

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notice from the Pass Through Trustee that the Pass Through Trustee's obligation
to purchase Equipment Notes under the Note Purchase Agreement has terminated, to
give notice to the Depositary (with a copy to the Paying Agent) substantially in
the form of Exhibit B to the Deposit Agreement requesting a withdrawal of all of
the remaining Deposits, together with accrued and unpaid interest on such
Deposits to the date of withdrawal, on the 15th day after the date that such
notice of withdrawal is given to the Depositary (or, if not a Business Day, on
the next succeeding Business Day) (a "Final Withdrawal"), provided that if the
day scheduled for the Final Withdrawal in accordance with the foregoing is
within 10 days before or after a Regular Distribution Date, then the Escrow
Agent shall request that such requested Final Withdrawal be made on such Regular
Distribution Date (the date of such requested withdrawal, the "Final Withdrawal
Date"). If for any reason the Escrow Agent shall have failed to give the Final
Withdrawal Notice to the Depositary on or before September 29, 2002, and there
are unwithdrawn Deposits on such date, the Final Withdrawal Date shall be deemed
to be October 14, 2002.

                  Section 1.03. Initial Escrow Amount; Issuance of Escrow
Receipts. The Escrow Agent hereby directs the Purchaser to, and the Purchaser
hereby acknowledges that on the date hereof it shall, irrevocably deliver by
wire transfer to the Depositary on behalf of the Escrow Agent an amount in U.S.
dollars ("Dollars") and immediately available funds equal to $24,391,148.66 for
deposit on behalf of the Escrow Agent with the Depositary in accordance with
Section 2.1 of the Deposit Agreement. The Purchaser hereby instructs the Escrow
Agent, upon receipt of such sum from the Purchaser, to confirm such receipt by
executing and delivering to the Pass Through Trustee an Escrow Receipt in the
form of Exhibit A hereto (an "Escrow Receipt"), (a) to be affixed by the Pass
Through Trustee to each Certificate and (b) to evidence the same percentage
interest (the "Escrow Interest") in the Account Amounts (as defined in Section
1.04) as the Fractional Undivided Interest in the Pass Through Trust evidenced
by the Certificate to which it is to be affixed. The Escrow Agent shall provide
to the Pass Through Trustee for attachment to each Certificate newly issued
under and in accordance with the Pass Through Trust Agreement an executed Escrow
Receipt as the Pass Through Trustee may from time to time request of the Escrow
Agent. Each Escrow Receipt shall be registered by the Escrow Agent in a register
(the "Register") maintained by the Escrow Agent in the same name and same manner
as the Certificate to which it is attached and may not thereafter be detached
from such Certificate to which it is to be affixed prior to the distribution of
the Final Withdrawal (the "Final Distribution"). After the Final Distribution,
no Escrow Receipts shall be issued and the Pass Through Trustee shall request
the return to the Escrow Agent for cancellation of all outstanding Escrow
Receipts.

                  Section 1.04. Payments to Receiptholders. All payments and
distributions made to holders of an Escrow Receipt (collectively
"Receiptholders") in respect of the Escrow Receipt shall be made only from
amounts deposited in the Paying Agent Account ("Account Amounts"). Each
Receiptholder, by its acceptance of an Escrow Receipt, agrees that (a) it will
look solely to the Account Amounts for any payment or distribution due to such
Receiptholder pursuant to the terms of the Escrow Receipt and this Agreement and
(b) it will have no recourse to ATA, the Pass Through Trustee, the Paying Agent
or the Escrow Agent for any such payment or distribution, except as expressly
provided herein or in the Pass Through Trust Agreement. No Receiptholder shall
have any right to vote or in any manner otherwise control the operation and

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management of the Paying Agent Account or the obligations of the parties hereto,
nor shall anything set forth herein, or contained in the terms of the Escrow
Receipt, be construed so as to constitute the Receiptholders from time to time
as partners or members of an association.

                  Section 1.05. Mutilated, Destroyed Lost or Stolen Escrow
Receipt. If (a) any mutilated Escrow Receipt is surrendered to the Escrow Agent
or the Escrow Agent receives evidence to its satisfaction of the destruction,
loss or theft of any Escrow Receipt and (b) there is delivered to the Escrow
Agent and the Pass Through Trustee such security, indemnity or bond, as may be
required by them to hold each of them harmless, then, absent notice to the
Escrow Agent or the Pass Through Trustee that such destroyed, lost or stolen
Escrow Receipt has been acquired by a protected purchaser, and provided that the
requirements of Section 8-405 of the Uniform Commercial Code in effect in any
applicable jurisdiction are met, the Escrow Agent shall execute, authenticate
and deliver, in exchange for or in lieu of any such mutilated, destroyed, lost
or stolen Escrow Receipt, a new Escrow Receipt or Escrow Receipts and of like
Escrow Interest in the Account Amounts and bearing a number not
contemporaneously outstanding.

                  In connection with the issuance of any new Escrow Receipt
under this Section 1.05, the Escrow Agent may require the payment of a sum
sufficient to cover any tax or other governmental charge that may be imposed in
relation thereto and any other expenses (including the fees and expenses of the
Pass Through Trustee and the Escrow Agent) connected therewith.

                  Any duplicate Escrow Receipt issued pursuant to this Section
1.05 shall constitute conclusive evidence of the appropriate Escrow Interest in
the Account Amounts, as if originally issued, whether or not the lost, stolen or
destroyed Escrow Receipt shall be found at any time.

                  The provisions of this Section are exclusive and shall
preclude (to the extent lawful) all other rights and remedies with respect to
the replacement or payment of mutilated, destroyed, lost or stolen Escrow
Receipts.

                  Section 1.06. Additional Escrow Amounts. On the date of any
Purchase Withdrawal, the Pass Through Trustee may re-deposit with the Depositary
some or all of the amounts so withdrawn in accordance with Section 2.4 of the
Deposit Agreement.

                  Section 1.07. Resignation or Removal of Escrow Agent. Subject
to the appointment and acceptance of a successor Escrow Agent as provided below,
the Escrow Agent may resign at any time by giving 30 days' prior written notice
thereof to the Investors, but may not otherwise be removed except for cause by
the written consent of the Investors with respect to Investors representing
Escrow Interests aggregating not less than a majority in interest in the Account
Amounts (an "Action of Investors"). Upon any such resignation or removal, the
Investors, by an Action of Investors, shall have the right to appoint a
successor Escrow Agent. If no successor Escrow Agent shall have been so
appointed and shall have accepted such appointment within 30 days after the
retiring Escrow Agent's giving of notice of resignation or the removal of the
retiring Escrow Agent, then the retiring Escrow Agent may appoint a successor
Escrow Agent, which shall be a commercial bank which has an office in the United
States with a combined capital and surplus of at least $100,000,000. Upon the
acceptance of any appointment as Escrow Agent hereunder by a successor Escrow
Agent, such successor Escrow

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Agent shall enter into such documents as the Pass Through Trustee shall require
and shall thereupon succeed to and become vested with all the rights, powers,
privileges and duties of the retiring Escrow Agent, and the retiring Escrow
Agent shall be discharged from its duties and obligations hereunder. No
resignation or removal of the Escrow Agent shall be effective unless a written
confirmation shall have been obtained from Moody's Investors Service, Inc. that
the replacement of the Escrow Agent with the successor Escrow Agent will not
result in (a) a reduction of the rating for the Certificates below the then
current rating for the Certificates or (b) a withdrawal or suspension of the
rating of the Certificates.

                  Section 1.08. Persons Deemed Owners. Prior to due presentment
of a Certificate for registration of transfer, the Escrow Agent and the Paying
Agent may treat the Person in whose name any Escrow Receipt is registered (as of
the day of determination) as the owner of such Escrow Receipt for the purpose of
receiving distributions pursuant to this Agreement and for all other purposes
whatsoever, and none of the Escrow Agent or the Paying Agent shall be affected
by any notice to the contrary.

                  Section 1.09. Further Assurances. The Escrow Agent agrees to
take such actions, and execute such other documents, as may be reasonably
requested by the Pass Through Trustee in order to effectuate the purposes of
this Agreement and the performance by the Escrow Agent of its obligations
hereunder.

                  SECTION 2. Paying Agent.

                  Section 2.01. Appointment of Paying Agent. The Escrow Agent
hereby irrevocably appoints and authorizes the Paying Agent to act as its paying
agent hereunder, for the benefit of the Investors, for such specific purposes
and with such powers as are specifically delegated to the Paying Agent by the
terms of this Agreement, together with such other powers as are reasonably
incidental thereto. The Paying Agent is authorized to enter into the Delayed
Funding Implementation Agreement. Any and all money received and held by the
Paying Agent under this Agreement or the Deposit Agreement shall be held in the
Paying Agent Account (as defined below) for the benefit of the Investors. The
Paying Agent (which term as used in this sentence shall include reference to its
affiliates and its own and its affiliates' officers, directors, employees and
agents): (a) shall have no duties or responsibilities hereunder except those
expressly set forth in this Agreement, and shall not by reason of this Agreement
be a trustee for the Escrow Agent; (b) shall not be responsible to the Escrow
Agent for any recitals, statements, representations or warranties of any person
other than itself contained in this Agreement or for the failure by the Escrow
Agent or any other person or entity (other than the Paying Agent) to perform any
of its obligations hereunder (whether or not the Paying Agent shall have any
knowledge thereof); and (c) except in respect of its express obligations
hereunder, shall not be responsible for any action taken or omitted to be taken
by it hereunder or provided for herein or in connection herewith, except for its
own willful misconduct or gross negligence (or simple negligence in connection
with the handling of funds).

                  Section 2.02. Establishment of Paving Agent Account. The
Paying Agent shall establish a deposit account (the "Paying Agent Account") at
Wilmington Trust Company in the name of the Escrow Agent. It is expressly
understood by the parties hereto that the Paying Agent

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is acting as the paying agent of the Escrow Agent hereunder and that no amounts
on deposit in the Paying Agent Account constitute part of the Trust Property.

                  Section 2.03. Payments from Paying Agent Account. The Escrow
Agent hereby irrevocably instructs the Paying Agent, and the Paying Agent agrees
to act, as follows:

                  (a) On each Interest Payment Date (as defined in the Deposit
Agreement) or as soon thereafter as the Paying Agent has confirmed receipt in
the Paying Agent Account from the Depositary of any amount in respect of accrued
interest on the Deposits, the Paying Agent shall distribute out of the Paying
Agent Account the entire amount deposited therein by the Depositary. There shall
be so distributed to each Receiptholder of record on the 15th day (whether or
not a Business Day) preceding such Interest Payment Date by check mailed to such
Receiptholder, at the address appearing in the Register, such Receiptholder's
pro rata share (based on the Escrow Interest in the Account Amounts held by such
Receiptholder) of the total amount of interest deposited by the Depositary in
the Paying Agent Account on such date, except that, with respect to Escrow
Receipts registered on the Record Date in the name of The Depository Trust
Company ("DTC") or the Purchaser, such distribution shall be made by wire
transfer in immediately available funds to the account designated by DTC or the
Purchaser, as the case may be.

                  (b) Upon the confirmation by the Paying Agent of receipt in
the Paying Agent Account from the Depositary of any amount in respect of the
Final Withdrawal, the Paying Agent shall forthwith distribute the entire amount
of the Final Withdrawal deposited therein by the Depositary to each
Receiptholder of record on the 15th day (whether or not a Business Day)
preceding the Final Withdrawal Date by check mailed to such Receiptholder, at
the address appearing in the Register, such Receiptholder's pro rata share
(based on the Escrow Interest in the Account Amounts held by such Receiptholder)
of the total amount in the Paying Agent Account on account of such Final
Withdrawal, except that, with respect to Escrow Receipts registered on such
record date in the name of DTC or the Purchaser, such distribution shall be made
by wire transfer in immediately available funds to the account designated by DTC
or the Purchaser, as the case may be.

                  (c) If any payment of interest or principal in respect of the
Final Withdrawal is not received by the Paying Agent within five days of the
applicable date when due, then it shall be distributed to Receiptholders after
actual receipt by the Paying Agent on the same basis as a Special Payment is
distributed under the Pass Through Trust Agreement.

                  (d) Upon the confirmation by the Paying Agent of receipt in
the Paying Agent Account from the Depositary of any amount in respect of a
Prepayment Withdrawal, the Paying Agent shall forthwith distribute the entire
amount of such Prepayment Withdrawal upon not less than 15 days prior notice to
the Receiptholders. There shall be distributed to each Receiptholder of record
on the 15th day (whether or not a Business Day) preceding such date of
distribution by check mailed to such Receiptholder, at the address appearing in
the Register, such Receiptholder's pro rata share (based on the Escrow Interest
in the Account Amounts held by such Receiptholder) of the total amount in the
Paying Agent Account on account of such Prepayment Withdrawal, except that, with
respect to the Escrow Receipts registered on such

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record date in the name of a nominee of DTC, such distribution shall be made by
wire transfer in immediately available funds to the account designated by DTC.

                  (e) The Paying Agent shall include with any check mailed
pursuant to this Section or any payment to the Purchaser, any notice required to
be distributed under the Pass Through Trust Agreement that is furnished to the
Paying Agent by the Pass Through Trustee.

                  Section 2.04. Withholding Taxes. The Paying Agent shall
exclude and withhold from each distribution of accrued interest on the Deposits
(as defined in the Deposit Agreement) and any amount in respect of any
Prepayment Withdrawal or the Final Withdrawal any and all withholding taxes
applicable thereto as required by federal law of the United States. The Paying
Agent agrees to act as such withholding agent and, in connection therewith,
whenever any present or future taxes or similar charges are required to be
withheld with respect to any amounts payable in respect of the Deposits (as
defined in the Deposit Agreement) or the escrow amounts, to withhold such
amounts and timely pay the same to the appropriate authority in the name of and
on behalf of the Receiptholders, that it will file any necessary withholding tax
returns or statements when due, and that, as promptly as possible after the
payment thereof, it will deliver to each such Receiptholder appropriate
documentation showing the payment thereof, together with such additional
documentary evidence as such Receiptholder may reasonably request from time to
time. The Paying Agent agrees to file any other information reports as it may be
required to file under United States law. Each Receiptholder or beneficial owner
of an interest in an Escrow Receipt that is a Non-U.S. Person, by its acceptance
of an Escrow Receipt or a beneficial interest therein, agrees to indemnify and
hold harmless the Escrow Agent and the Paying Agent from and against any
improper failure to withhold Taxes from amounts payable to it or for its benefit
other than an improper failure attributable to the gross negligence or willful
misconduct of the Escrow Agent or the Paying Agent, as the case may be. The
Paying Agent agrees, to the extent required by the Internal Revenue Code of
1986, as amended (the "Code"), and applicable federal regulations thereunder, to
withhold from each payment due hereunder or under any Escrow Receipts, United
States withholding taxes at the appropriate rate, and, on a timely basis, to
deposit such amounts with the appropriate taxing authority and make such
returns, filings and other reports in connection therewith as are required by
the Code and as promptly as possible after the payment thereof to deliver to
each such Receiptholder appropriate documentation showing the payment thereof,
together with such additional documentary evidence as such Receiptholder may
reasonably request from time to time. In the event that any withholding tax is
imposed on a payment to a Receiptholder, such tax shall reduce the amount
otherwise distributable to the Receiptholder in accordance with this Section.
Any Receiptholder which is organized under the laws of a jurisdiction outside
the United States shall, on or prior to the date such Receiptholder becomes a
Receiptholder, (a) so notify the Paying Agent, (b) (i) provide the Paying Agent
with Internal Revenue Service Form W-8BEN or W-8ECI, as appropriate (or any
successor form), or (ii) notify the Paying Agent that it is not entitled to an
exemption from United States withholding tax or a reduction in the rate thereof
on payments of interest. Any such Receiptholder agrees by its acceptance of an
Escrow Receipt, on an ongoing basis, to provide like certification for each
taxable year and to notify the Paying Agent should subsequent circumstances
arise affecting the information provided the Paying Agent in clauses (a) and (b)
above. The Paying Agent shall be fully protected in relying upon, and each
Receiptholder by its acceptance of an Escrow Receipt agrees to indemnify and
hold the Paying Agent harmless

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                                      -9-

against all claims or liability of any kind arising in connection with or
related to the Paying Agent's reliance upon any documents, forms or information
provided by any Receiptholder to the Paying Agent. In addition, if the Paying
Agent has not withheld taxes on any payment made to any Receiptholder, and the
Paying Agent is subsequently required to remit to any taxing authority any such
amount not withheld, such Receiptholder shall return such amount to the Paying
Agent upon written demand by the Paying Agent. The Paying Agent shall be liable
only for direct (but not consequential) damages to any Receiptholder due to the
Paying Agent's violation of the Code and only to the extent such liability is
caused by the Paying Agent's gross negligence or willful misconduct.

                  Section 2.05. Resignation or Removal of Paying Agent. Subject
to the appointment and acceptance of a successor Paying Agent as provided below,
the Paying Agent may resign at any time by giving 30 days' prior written notice
thereof to the Escrow Agent, but may not otherwise be removed except for cause
by the Escrow Agent. Upon any such resignation or removal, the Escrow Agent
shall have the right to appoint a successor Paying Agent, which shall be a
commercial bank which has an office in the United States with a combined capital
and surplus of at least $100,000,000. If no successor Paying Agent shall have
been so appointed and shall have accepted such appointment within 30 days after
the retiring Paying Agent's giving of notice of resignation or the removal of
the retiring Paying Agent, then the retiring Paying Agent may (i) appoint a
successor Paying Agent, which shall be a commercial bank which has an office in
the United States with a combined capital and surplus of at least $100,000,000
or (ii) petition a court of competent jurisdiction to appoint such a successor.
Upon the acceptance of any appointment as Paying Agent hereunder by a successor
Paying Agent, such successor Paying Agent shall enter into such documents as the
Escrow Agent shall require and shall thereupon succeed to and become vested with
all the rights, powers, privileges and duties of the retiring Paying Agent, and
the retiring Paying Agent shall be discharged from its duties and obligations
hereunder.

                  Section 2.06. Notice of Prepayment Withdrawal and Final
Withdrawal. Promptly after receipt by the Paying Agent of notice that the Escrow
Agent has requested a Prepayment Withdrawal or a Final Withdrawal or that
Prepayment Withdrawal or a Final Withdrawal will be made, the Paying Agent shall
cause notice of the distribution of the Final Withdrawal to be mailed to each of
the Receiptholders at its address as it appears in the Register. Such notice
shall be mailed not less than 15 days prior to the distribution date of such
prepayment Withdrawal (the "Prepayment Withdrawal Date") or the Final Withdrawal
Date. Such notice shall set forth:

                  (i) the Prepayment Withdrawal Date or the Final Withdrawal
         Date and the date for determining Receiptholders of record who shall be
         entitled to receive distributions in respect of the Prepayment
         Withdrawal or the Final Withdrawal,

                  (ii) the amount of the payment in respect of the Prepayment
         Withdrawal or the Final Withdrawal for each $1,000 face amount
         Certificate (based on information provided by the Pass Through Trustee)
         and the amount thereof constituting unused Deposits (as defined in the
         Deposit Agreement) and interest thereon, and

                  (iii) if the Prepayment Withdrawal Date or the Final
         Withdrawal Date is the same date as a Regular Distribution Date, the
         total amount to be received on such date for

<PAGE>

                                      -10-

         each $1,000 face amount Certificate (based on information
         provided by the Pass Through Trustee).

                  Such mailing may include any notice required to be given to
Certificateholders in connection with such distribution pursuant to the Pass
Through Trust Agreement.

                  SECTION 3. Payments. If, notwithstanding the instructions in
Section 4 of the Deposit Agreement that certain amounts payable to the Escrow
Agent under the Deposit Agreement be paid by the Depositary directly to the
Paying Agent or the Pass Through Trustee (depending on the circumstances), the
Escrow Agent receives any such payment thereunder, then the Escrow Agent shall
forthwith pay such amount in Dollars and in immediately available funds by wire
transfer to (a) in the case of a payment of accrued interest on the Deposits (as
defined in the Deposit Agreement), any Prepayment Withdrawal or any Final
Withdrawal, directly to the Paying Agent Account, (b) in the case of any
Purchase Withdrawal, directly to the Pass Through Trustee or its designee as
specified and in the manner provided in the Applicable Notice of Purchase
Withdrawal and (c) in the case of any Replacement Withdrawal (other than accrued
interest), to the Replacement Depositary as provided in the Replacement
Depositary Agreement. The Escrow Agent hereby waives any and all rights of
set-off, combination of accounts, right of retention or any similar right
(whether arising under applicable law, contract or otherwise) it may have
against amounts payable to the Paying Agent howsoever arising.

                  SECTION 4. Other Actions. The Escrow Agent shall take such
other actions under or in respect of the Deposit Agreement (including, without
limitation, the enforcement of the obligations of the Depositary thereunder) as
the Investors, by an Action of Investors, may from time to time request.

                  SECTION 5. Representations and Warranties of the Escrow Agent.
The Escrow Agent represents and warrants to ATA, the Investors, the Paying Agent
and the Pass Through Trustee as follows:

                  (i)   it is a national banking association duly organized and
                        validly existing in good standing under the laws of the
                        United States of America;

                  (ii)  it has full power, authority and legal right to conduct
                        its business and operations as currently conducted and
                        to enter into and perform its obligations under this
                        Agreement, the Deposit Agreement and any Replacement
                        Deposit Agreement;

                  (iii) the execution, delivery and performance of each of this
                        Agreement, the Deposit Agreement and any Replacement
                        Deposit Agreement have been duly authorized by all
                        necessary corporate action on the part of it and do not
                        require any stockholder approval, or approval or consent
                        of any trustee or holder of any indebtedness or
                        obligations of it, and each such document has been duly
                        executed and delivered by it and constitutes its legal,
                        valid and binding obligations enforceable against it in
                        accordance with the terms hereof or thereof except as
                        such enforceability may be limited by bankruptcy,
                        insolvency, moratorium, reorganization or other similar
                        laws

<PAGE>

                                      -11-

                        or equitable principles of general application to or
                        affecting the enforcement of creditors' rights generally
                        (regardless of whether such enforceability is considered
                        in a proceeding in equity or at law);

                  (iv)  no authorization, consent or approval of or other action
                        by, and no notice to or filing with, any United States
                        federal or state governmental authority or regulatory
                        body is required for the execution, delivery or
                        performance by it of this Agreement or the Deposit
                        Agreement or any Replacement Deposit Agreement;

                  (v)   neither the execution, delivery or performance by it of
                        this Agreement or the Deposit Agreement or any
                        Replacement Deposit Agreement, nor compliance with the
                        terms and provisions hereof or thereof, conflicts or
                        will conflict with or results or will result in a breach
                        or violation of any of the terms, conditions or
                        provisions of, or will require any consent or approval
                        under, any law, governmental rule or regulation or the
                        charter documents, as amended, or bylaws, as amended, of
                        it or any similar instrument binding on it or any order,
                        writ, injunction or decree of any court or governmental
                        authority against it or by which it or any of its
                        properties is bound or any indenture, mortgage or
                        contract or other agreement or instrument to which it is
                        a party or by which it or any of its properties is
                        bound, or constitutes or will constitute a default
                        thereunder or results or will result in the imposition
                        of any lien upon any of its properties; and

                  (vi)  there are no pending or, to its knowledge, threatened
                        actions, suits, investigations or proceedings (whether
                        or not purportedly on behalf of it) against or affecting
                        it or any of its property before or by any court or
                        administrative agency which, if adversely determined,
                        (A) would adversely affect the ability of it to perform
                        its obligations under this Agreement or the Deposit
                        Agreement or any Replacement Deposit Agreement or (B)
                        would call into question or challenge the validity of
                        this Agreement or the Deposit Agreement or the
                        enforceability hereof or thereof in accordance with the
                        terms hereof or thereof, nor is the Escrow Agent in
                        default with respect to any order of any court,
                        governmental authority, arbitration board or
                        administrative agency so as to adversely affect its
                        ability to perform its obligations under this Agreement
                        or the Deposit Agreement.

                  SECTION 6. Representations and Warranties of the Paying Agent.
The Paying Agent represents and warrants to ATA, the Investors, the Escrow Agent
and the Pass Through Trustee as follows:

                  (i)   it is a Delaware banking corporation duly organized and
                        validly existing in good standing under the laws of the
                        State of Delaware;

<PAGE>

                                      -12-

                  (ii)  it has full power, authority and legal right to conduct
                        its business and operations as currently conducted and
                        to enter into and perform its obligations under this
                        Agreement;

                  (iii) the execution, delivery and performance of this
                        Agreement has been duly authorized by all necessary
                        corporate action on the part of it and does not require
                        any stockholder approval, or approval or consent of any
                        trustee or holder of any indebtedness or obligations of
                        it, and such document has been duly executed and
                        delivered by it and constitutes its legal, valid and
                        binding obligations enforceable against it in accordance
                        with the terms hereof except as such enforceability may
                        be limited by bankruptcy, insolvency, moratorium,
                        reorganization or other similar laws or equitable
                        principles of general application to or affecting the
                        enforcement of creditors' rights generally (regardless
                        of whether such enforceability is considered in a
                        proceeding in equity or at law);

                  (iv)  no authorization, consent or approval of or other action
                        by, and no notice to or filing with, any Delaware state
                        governmental or United States federal authority or
                        regulatory body governing its banking or trust powers is
                        required for the execution, delivery or performance by
                        it of this Agreement;

                  (v)   neither the execution, delivery or performance by it of
                        this Agreement, nor compliance with the terms and
                        provisions hereof, conflicts or will conflict with or
                        results or will result in a breach or violation of any
                        of the terms, conditions or provisions of, or will
                        require any consent or approval under, any law,
                        governmental rule or regulation or the charter
                        documents, as amended, or bylaws, as amended, of it or
                        any similar instrument binding on it or any order, writ,
                        injunction or decree of any court or governmental
                        authority against it or by which it or any of its
                        properties is bound or any indenture, mortgage or
                        contract or other agreement or instrument to which it is
                        a party or by which it or any of its properties is
                        bound, or constitutes or will constitute a default
                        thereunder or results or will result in the imposition
                        of any lien upon any of its properties; and

                  (vi)  there are no pending or, to its knowledge, threatened
                        actions, suits, investigations or proceedings (whether
                        or not purportedly on behalf of it) against or affecting
                        it or any of its property before or by any court or
                        administrative agency which, if adversely determined,
                        (A) would adversely affect the ability of it to perform
                        its obligations under this Agreement or (B) would call
                        into question or challenge the validity of this
                        Agreement or the enforceability hereof in accordance
                        with the terms hereof, nor is the Paying Agent in
                        default with respect to any order of any court,
                        governmental authority, arbitration board or
                        administrative agency so as to adversely affect its
                        ability to perform its obligations under this Agreement.

<PAGE>

                                      -13-

                  SECTION 7. Indemnification. Except for actions expressly
authorized or required of the Escrow Agent or the Paying Agent hereunder, each
of the Escrow Agent and the Paying Agent shall in all cases be fully justified
in failing or refusing to act hereunder unless it shall have been indemnified by
the party requesting such action in a manner reasonably satisfactory to it
against any and all liability and expense which may be incurred by it by reason
of taking or continuing to take any such action. In the event ATA requests any
amendment to any Operative Agreement (as defined in Annex A to the Note Purchase
Agreement), the Pass Through Trustee agrees to pay all reasonable fees and
expenses (including, without limitation, reasonable fees and disbursements of
counsel) of the Escrow Agent and the Paying Agent in connection therewith.

                  SECTION 8. Amendment, Etc. Upon request of the Pass Through
Trustee and approval by an Action of Investors, the Escrow Agent and the Paying
Agent shall enter into an amendment to this Agreement, so long as such amendment
does not adversely affect the rights or obligations of the Escrow Agent or the
Paying Agent or the rights of the Investors, provided that upon request of the
Pass Through Trustee and without any consent of the Investors, the Escrow Agent
shall enter into an amendment to this Agreement for any of the following
purposes:

                  (1) to correct or supplement any provision in this Agreement
         which may be defective or inconsistent with any other provision herein
         or to cure any ambiguity or correct any mistake or to modify any other
         provision with respect to matters or questions arising under this
         Agreement, provided that any such action shall not materially adversely
         affect the interests of the Investors; or

                  (2) to comply with applicable law, any requirement of the SEC,
         any federal or state banking rule or regulation or the rules or
         regulations of any applicable regulatory body; or

                  (3) to evidence and provide for the acceptance of appointment
         under this Agreement of a successor Escrow Agent, successor Paying
         Agent or successor Pass Through Trustee.

                  Notwithstanding any provision of this Agreement, upon and
simultaneously with the issuance of the Additional Certificates (as defined in
the Delayed Funding Implementation Agreement), this Agreement shall be forthwith
amended as provided in the Delayed Funding Implementation Agreement, without any
need for further action on the part of any party hereto and without any consent
of any of the Receiptholders.

                  SECTION 9. Notices. Unless otherwise expressly provided
herein, any notice or other communication under this Agreement shall be in
writing (including by facsimile) and shall be deemed to be given and effective
upon receipt thereof. All notices shall be sent to (a) in the case of the
Investors, as their respective addresses shall appear in the Register, (b) in
the case of the Escrow Agent, Wells Fargo Bank Northwest, National Association,
79 South Main Street, 3rd Floor, Salt Lake City, UT 84111, Attention: Corporate
Trust Services (Telecopier: (801) 246-5053), (c) in the case of the Pass Through
Trustee, Wilmington Trust Company, Rodney Square North, 1100 North Market
Street, Wilmington, DE 19890, Attention: Corporate Trust Administration
(Telecopier: (302) 636-4140) or (d) in the case of the Paying Agent, Wilmington

<PAGE>

                                      -14-

Trust Company, Rodney Square North, 1100 North Market Street, Wilmington, DE
19890, Attention: Corporate Trust Administration (Telecopier: (302) 636-4140),
in each case with a copy to American Trans Air, Inc., 7337 West Washington
Street, Indianapolis, Indiana 46231, Attention: Kenneth K. Wolff, Chief
Financial Officer (Telecopier: (317) 240-7091) (or at such other address as any
such party may specify from time to time in a written notice to the other
parties). On or prior to the execution of this Agreement, the Pass Through
Trustee has delivered to the Escrow Agent a certificate containing specimen
signatures of the representatives of the Pass Through Trustee who are authorized
to give notices and instructions with respect to this Agreement. The Escrow
Agent may conclusively rely on such certificate until the Escrow Agent receives
written notice from the Pass Through Trustee to the contrary.

                  SECTION 10. Transfer. No party hereto shall be entitled to
assign or otherwise transfer this Agreement (or any interest herein) other than
(in the case of the Escrow Agent) to a successor escrow agent under Section 1.07
hereof or (in the case of the Paying Agent) to a successor paying agent under
Section 2.05 hereof, and any purported assignment in violation thereof shall be
void. This Agreement shall be binding upon the parties hereto and their
respective successors and (in the case of the Escrow Agent and the Paying Agent)
their respective permitted assigns.

                  SECTION 11. Non-Petition. Each of the Escrow Agent, the Pass
Through Trustee and the Paying Agent hereby agrees that it will not institute
against, or join any other person in instituting against, the Purchaser any
bankruptcy, reorganization, arrangement, insolvency or liquidation proceeding,
or other proceeding under any Federal or state bankruptcy or similar law, for
one year and a day after the latest maturing note issued by the Purchaser is
paid in full. The provisions of this Section 11 shall survive the termination of
this Agreement.

                  SECTION 12. Limited Recourse. Notwithstanding anything to the
contrary contained in this Agreement, the obligations of the Purchaser under
this Agreement are solely the corporate obligations of the Purchaser and shall
be payable by the Purchaser solely as provided in this Section 12. Each of the
Escrow Agent, the Pass Through Trustee and the Paying Agent agrees that the
Purchaser shall only be required to pay (a) any fees or liabilities that it may
incur hereunder only to the extent the Purchaser has Excess Funds (as defined
below) and (b) any expenses, indemnities or other liabilities that it may incur
hereunder only to the extent the Purchaser has Excess Funds. In addition, no
amount owing by the Purchaser hereunder in excess of the liabilities that the
Purchaser is required to pay in accordance with the preceding sentence shall
constitute a claim (as defined in Section 101 to Title 11 of the United States
Code) against the Purchaser. No recourse shall be had for the payment of any
amount owing hereunder or for the payment of any fee hereunder or any other
obligation of, or claim against, the Purchaser arising out of or based upon this
Agreement, against any stockholder, employee, officer, director, incorporator or
manager of the Purchaser or affiliate thereof except as otherwise provided in
this Section 12; provided, however, that the foregoing shall not relieve any
such person or entity of any liability they might otherwise have as a result of
fraudulent actions or omissions taken by them. Any and all claims against the
Purchaser shall be subordinate to the claims of the holders of the notes issued
by the Purchaser. The obligations of the Escrow Agent, the Pass Through Trustee
and the Paying Agent under this Section 12 shall survive the termination of this
Agreement. For purposes of this Section 12, "Excess Funds" shall mean, as of any
date of

<PAGE>

                                      -15-

determination, all funds not required, after giving effect to all
amounts on deposit in the commercial paper account of the Purchaser and the
issuer account of the Purchaser or expected to be on deposit in the commercial
paper account of the Purchaser, to pay or provide for the payment of any
outstanding notes issued by the Purchaser when due.

                  SECTION 13. Entire Agreement. This Agreement sets forth all of
the promises, covenants, agreements, conditions and understandings among the
Escrow Agent, the Paying Agent, the Investors and the Pass Through Trustee with
respect to the subject matter hereof, and supersedes all prior and
contemporaneous agreements and undertakings, inducements or conditions, express
or implied, oral or written.

                  SECTION 14. Survival. This Agreement shall remain in full
force and effect through March 17, 2003.

                  SECTION 15. Governing Law. This Agreement shall be governed
by, and construed in accordance with, the laws of the State of New York.

                  SECTION 16. Waiver of Jury Trial Right. EACH OF THE ESCROW
AGENT, THE PAYING AGENT, THE INVESTORS AND THE PASS THROUGH TRUSTEE ACKNOWLEDGES
AND ACCEPTS THAT IN ANY SUIT, ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO
THIS AGREEMENT SUCH PARTY IRREVOCABLY WAIVES ITS RIGHT TO A TRIAL BY JURY.

                  SECTION 17. Counterparts. This Agreement may be executed in
one or more counterparts, all of which taken together shall constitute one
instrument.

                  SECTION 18. Notwithstanding anything contained herein to the
contrary, it is expressly understood and agreed by the parties hereto that (a)
this Agreement is executed and delivered by Wilmington Trust Company in
connection with its role as Pass Through Trustee, not individually or personally
but solely as Pass Through Trustee in the exercise of the powers and authority
conferred and vested in it under the Pass Through Trust Agreement, (b) each of
the representations, undertakings and agreements herein made on the part of the
Pass Through Trustee is made and intended not as personal representations,
undertakings and agreements by Wilmington Trust Company but is made and intended
for the purpose for binding only the Pass Through Trustee and (c) under no
circumstances shall Wilmington Trust Company be personally liable for the
payment of any indebtedness or expenses of the Pass Through Trustee or be liable
for the breach or failure of any obligation, representation, warranty or
covenant made or undertaken by the Pass Through Trustee under this Agreement or
the other related documents.

<PAGE>

                  IN WITNESS WHEREOF, the Escrow Agent, the Paying Agent, the
Purchaser and the Pass Through Trustee have caused this Escrow and Paying Agent
Agreement (Class B) to be duly executed as of the day and year first above
written.

                                                 WELLS FARGO BANK NORTHWEST,
                                                 NATIONAL ASSOCIATION,
                                                 as Escrow Agent

                                                 By
                                                   ---------------------------
                                                   Name:
                                                   Title:

                                                 PK AIRFINANCE US, INC.,
                                                 as Purchaser

                                                 By
                                                   ---------------------------
                                                   Name:
                                                   Title:

                                                 WILMINGTON TRUST COMPANY, not
                                                 in its individual capacity, but
                                                 solely as Pass Through Trustee
                                                 for and on behalf of American
                                                 Trans Air 2002-1B Pass Through
                                                 Trust

                                                 By
                                                   ----------------------------
                                                   Name:
                                                   Title:

                                                 WILMINGTON TRUST COMPANY,
                                                 as Paying Agent

                                                 By
                                                   ----------------------------
                                                   Name:
                                                   Title:

<PAGE>

                                                                     EXHIBIT A

                    AMERICAN TRANS AIR 2002-1B ESCROW RECEIPT

                                     No. __

                  This Escrow Receipt evidences a fractional undivided interest
in amounts ("Account Amounts") from time to time deposited into a certain paying
agent account (the "Paying Agent Account") described in the Escrow and Paying
Agent Agreement (Class B) dated as of March 28, 2002 (as amended, modified or
supplemented from time to time, the "Escrow and Paying Agent Agreement") among
Wells Fargo Bank Northwest, National Association, as Escrow Agent (in such
capacity, together with its successors in such capacity, the "Escrow Agent"), PK
AirFinance US, Inc, Wilmington Trust Company, as Pass Through Trustee (in such
capacity, together with its successors in such capacity, the "Pass Through
Trustee") and Wilmington Trust Company, as paying agent (in such capacity,
together with its successors in such capacity, the "Paying Agent"). Capitalized
terms not defined herein shall have the meanings assigned to them in the Escrow
and Paying Agent Agreement.

                  This Escrow Receipt is issued under and is subject to the
terms, provisions and conditions of the Escrow and Paying Agent Agreement. By
virtue of its acceptance hereof the holder of this Escrow Receipt assents and
agrees to be bound by the provisions of the Escrow and Paying Agent Agreement
and this Escrow Receipt.

                  This Escrow Receipt represents a fractional undivided interest
in amounts deposited from time to time in the Paying Agent Account, and grants
or represents no rights, benefits or interests of any kind in respect of any
assets or property other than such amounts. This Escrow Receipt evidences the
same percentage interest in the Account Amounts as the Fractional Undivided
Interest in the Pass Through Trust evidenced by the Certificate to which this
Escrow Receipt is affixed.

                  All payments and distributions made to Receiptholders in
respect of the Escrow Receipt shall be made only from Account Amounts deposited
in the Paying Agent Account. The holder of this Escrow Receipt, by its
acceptance of this Escrow Receipt, agrees that it will look solely to the
Account Amounts for any payment or distribution due to it pursuant to this
Escrow Receipt and that it will not have any recourse to ATA, the Pass Through
Trustee, the Paying Agent or the Escrow Agent for any such payment or
distribution, except as expressly provided herein or in the Pass Through Trust
Agreement. No Receiptholder of this Escrow Receipt shall have any right to vote
or in any manner otherwise control the operation and management of the Paying
Agent Account, nor shall anything set forth herein, or contained in the terms of
this Escrow Receipt, be construed so as to constitute the Receiptholders from
time to time as partners or members of an association.

                  This Escrow Receipt may not be assigned or transferred except
in connection with the assignment or transfer of the Certificate to which this
Escrow Receipt is affixed. After payment to the holder hereof of its Escrow
Interest in the Final Distribution, upon the request of

<PAGE>

                                      -2-

the Pass Through Trustee, the holder hereof will return this Escrow Receipt to
the Pass Through Trustee.

                  The Paying Agent may treat the person in whose name the
Certificate to which this Escrow Receipt is attached as the owner hereof for all
purposes, and the Paying Agent shall not be affected by any notice to the
contrary.

                  THIS ESCROW RECEIPT SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAW OF THE STATE OF NEW YORK.

<PAGE>

                  IN WITNESS WHEREOF, the Escrow Agent has caused this Escrow
Receipt to be duly executed.

Dated:

                                                     WELLS FARGO BANK NORTHWEST,
                                                     NATIONAL ASSOCIATION
                                                     as Escrow Agent

                                                     By
                                                       -----------------------
                                                       Name:
                                                       Title:

<PAGE>

                                                                  EXHIBIT B

                             WITHDRAWAL CERTIFICATE
                                    (Class B)

Wells Fargo Bank Northwest, National Association,
as Escrow Agent

Dear Sirs:

                  Reference is made to the Escrow and Paying Agent Agreement
(Class B), dated as of March 28, 2002 (as amended, modified or supplemented from
time to time in accordance with the terms thereof, the "Agreement"). [We hereby
certify to you that the conditions to the obligations of the undersigned to
execute a Participation Agreement pursuant to the Note Purchase Agreement have
been satisfied.] [We hereby notify you that the Depositary is being replaced in
accordance with Section 4(a)(vii) of the Note Purchase Agreement.] Pursuant to
Section 1.02(c) of the Agreement, please execute the attached Notice of
Withdrawal and immediately transmit by facsimile to the Depositary, at (212)
793-1246, Attention: Global Agency & Trust Services.

                                Very truly yours,

                                WILMINGTON TRUST COMPANY
                                not in its individual capacity but solely as
                                Pass Through Trustee

                                By:
                                   --------------------------------------------
                                   Name:
                                   Title:

Dated: _________, ____

<PAGE>
                                      -2-

                                                           EXHIBIT C

                        PREPAYMENT WITHDRAWAL CERTIFICATE
                                    (Class B)

Wells Fargo Bank Northwest, National Association,
as Escrow Agent

Dear Sirs:

                  Reference is made to the Escrow and Paying Agent Agreement
(Class B), dated as of March 28, 2002 (as amended, modified or supplemented from
time to time in accordance with the terms thereof, the "Agreement"). The
undersigned has been notified by American Trans Air, Inc. (the "Company") that
(i) as a result of a downgrading of the Company's corporate credit ratings,
General Electric Capital Corporation has elected to exercise its contractual
rights not to act as an Owner Participant with respect to a GE Aircraft (as
defined in the Note Purchase Agreement), (ii) pursuant to the separate financing
agreement between the Company and General Electric Capital Corporation, the
Company will not own or lease such GE Aircraft and (iii) the Company will not
identify and substitute a Substitute Aircraft (as defined in the Note Purchase
Agreement) for such GE Aircraft. Pursuant to Section 1.02(d) of the Agreement,
please execute the attached Notice of Prepayment Withdrawal and immediately
transmit by facsimile to the Depositary, at (212) 793-1246, Attention: Global
Agency and Trust Services.

                                Very truly yours,

                                WILMINGTON TRUST COMPANY,
                                not in its individual capacity but
                                solely as Pass Through Trustee

                                By   __________________________
                                     Name

Dated: _________, ____<PAGE>

                                                                  EXECUTION COPY

--------------------------------------------------------------------------------

                             NOTE PURCHASE AGREEMENT

                           Dated as of March 28, 2002

                                      Among

                            AMERICAN TRANS AIR, INC.

                                  AMTRAN, INC.,

                                  as Guarantor

                            WILMINGTON TRUST COMPANY,
                    as Pass Through Trustee under each of the
                          Pass Through Trust Agreements

                            WILMINGTON TRUST COMPANY,
                             as Subordination Agent

                WELLS FARGO BANK NORTHWEST, NATIONAL ASSOCIATION,
                                 as Escrow Agent

                                       and

                            WILMINGTON TRUST COMPANY,
                                 as Paying Agent

------------------------------------------------------------------------------

<PAGE>

                        INDEX TO NOTE PURCHASE AGREEMENT

                                                                     Page

SECTION 1.  Financing of Aircraft.......................................3

SECTION 2.  Conditions Precedent........................................7

SECTION 3.  Representations and Warranties..............................8

SECTION 4.  Covenants..................................................12

SECTION 5.  Notices....................................................15

SECTION 6.  Expenses...................................................15

SECTION 7.  Further Assurances.........................................16

SECTION 8.  Miscellaneous..............................................16

SECTION 9.  Governing Law..............................................17

SECTION 10.  Subordination Agent's Liability...........................17

<PAGE>

                                    Schedules

Schedule I-A        Aircraft and Scheduled Delivery Months
Schedule I-B        Aircraft and Scheduled Delivery Months
Schedule II         Pass Through Trust Agreements
Schedule III-A      Deposit Agreements
Schedule III-B      Delayed Deposit Agreements
Schedule IV         Escrow and Paying Agent Agreements
Schedule V          Mandatory Document Terms
Schedule VI         Mandatory Economic Terms
Schedule VII        Aggregate Amortization Schedule

Annex A     Definitions

                                    Exhibits

Exhibit A-1         Form of Leased Aircraft Participation Agreement
Exhibit A-2-1       Form of 467 Lease
Exhibit A-2-2       Form of Non-467 Lease
Exhibit A-3         Form of Leased Aircraft Indenture
Exhibit A-4-1       Form of Purchase Agreement Assignment (ATA Aircraft)
Exhibit A-4-2       Form of Purchase Agreement Assignment (GE Aircraft)
Exhibit A-5         Form of Leased Aircraft Trust Agreement
Exhibit A-6         Form of Leased Aircraft Guarantee
Exhibit B           Form of Delivery Notice
Exhibit C-1         Form of Owned Aircraft Participation Agreement
Exhibit C-2         Form of Owned Aircraft Indenture
Exhibit C-3         Form of Owned Aircraft Guarantee
Exhibit D           Additional Subordination Provision for Series C Equipment
                    Notes

<PAGE>

                             NOTE PURCHASE AGREEMENT

              This NOTE PURCHASE AGREEMENT, dated as of March 28, 2002, among
(i) AMERICAN TRANS AIR, INC., an Indiana corporation (the "Company"), (ii)
AMTRAN, INC., an Indiana corporation (the "Guarantor"), (iii) WILMINGTON TRUST
COMPANY ("WTC"), a Delaware banking corporation, not in its individual capacity
except as otherwise expressly provided herein, but solely as trustee (in such
capacity together with its successors in such capacity, the "Pass Through
Trustee") under each of the two separate Pass Through Trust Agreements (as
defined below), (iv) WILMINGTON TRUST COMPANY, a Delaware banking corporation,
not in its individual capacity except as otherwise expressly provided herein,
but solely as subordination agent and trustee (in such capacity together with
its successors in such capacity, the "Subordination Agent") under the
Intercreditor Agreement (as defined below), (v) WELLS FARGO BANK NORTHWEST,
NATIONAL ASSOCIATION, a national banking association, as Escrow Agent (in such
capacity together with its successors in such capacity, the "Escrow Agent"),
under each of the Escrow and Paying Agent Agreements (as defined below) and (vi)
WILMINGTON TRUST COMPANY, a Delaware banking corporation, not in its individual
capacity except as otherwise expressly provided herein, but solely as Paying
Agent (in such capacity together with its successors in such capacity, the
"Paying Agent") under each of the Escrow and Paying Agent Agreements.

                              W I T N E S S E T H:

              WHEREAS, capitalized terms used but not defined herein shall have
the meanings ascribed to such terms in Annex A hereto;

              WHEREAS, the Company has obtained (either directly or through
GECC) commitments from the Manufacturer pursuant to the Aircraft Purchase
Agreements for the delivery of, and/or has taken delivery of, the Boeing 737-800
aircraft listed in Schedule I-A hereto.

              WHEREAS, pursuant to each of the Pass Through Trust Agreements set
forth in Schedule II hereto (as amended, supplemented or otherwise modified from
time to time, the "Pass Through Trust Agreements"), and concurrently with the
execution and delivery of this Agreement, separate grantor trusts (collectively,
the "Pass Through Trusts" and, individually, a "Pass Through Trust") have been
created to facilitate certain of the transactions contemplated hereby,
including, without limitation, the issuance and sale of pass through
certificates pursuant thereto (collectively, the "Certificates") to provide for
a portion of the financing of the Aircraft;

              WHEREAS, the Company, the Guarantor, the Pass Through Trustee and
the Investors (as defined in the Registration Rights Agreement) are entering
into the Registration Rights Agreement dated the date hereof;

<PAGE>

              WHEREAS, the Company, the Guarantor, the Pass Through Trustee, the
Subordination Agent, the Escrow Agent, AIG Matched Funding Corp., not in its
individual capacity except as otherwise expressly provided therein, but solely
as Class A Liquidity Provider and Class B Liquidity Provider (in such capacity
together with its successors in such capacity, the "Liquidity Provider"), the
Paying Agent and the Purchasers concurrently herewith are entering into a
Delayed Funding Implementation Agreement, dated as of the date hereof (as
amended, supplemented or otherwise modified from time to time, the "Delayed
Funding Implementation Agreement") pursuant to which the parties thereto agree
to supplement and modify the Operative Agreements, as defined therein;

              WHEREAS, concurrently with the execution and delivery of this
Agreement, (i) the Escrow Agents and the Depositary entered into the Deposit
Agreements set forth in Schedule III-A hereto and the Delayed Deposit Agreements
set forth in Schedule III-B hereto and (ii) the Pass Through Trustees, the
Purchasers, the Paying Agents and the Escrow Agents entered into the Escrow and
Paying Agent Agreements set forth in Schedule IV hereto (as amended,
supplemented or otherwise modified from time to time, the "Escrow and Paying
Agent Agreements");

              WHEREAS, prior to (or, in the case of the utilization of bridge
financing, after) the delivery of each Aircraft, the Company will determine
whether to enter into a leveraged lease transaction as lessee with respect to
such Aircraft (a "Leased Aircraft") or to purchase as owner pursuant to a
secured loan transaction such Aircraft (an "Owned Aircraft") and will give to
the Pass Through Trustee a Delivery Notice (as defined below) specifying its
election;

              WHEREAS, upon receipt of a Delivery Notice with respect to an
Aircraft, subject to the terms and conditions of this Agreement, the applicable
Pass Through Trustees will enter into the applicable Financing Agreements
relating to such Aircraft;

              WHEREAS, on the Funding Date for each Aircraft, each Pass Through
Trustee will fund its purchase of Equipment Notes with (i) the proceeds of one
or more Deposits withdrawn by the applicable Escrow Agent under the related
Deposit Agreement bearing the same interest rate as the Certificates issued by
such Pass Through Trust or (ii) in the case an Aircraft for which the Funding
Date is the Issuance Date, with a portion of the proceeds of the sale of the
Certificates; and

              WHEREAS, concurrently with the execution and delivery of this
Agreement, (i) the Liquidity Provider, has entered into two separate revolving
credit agreements (as amended, supplemented or otherwise modified from time to
time, each a "Liquidity Facility"), one each for the benefit of the
Certificateholders of each Pass Through Trust, with the Subordination Agent, as
agent for the Pass Through Trustee on behalf of each such Pass Through Trust and
(ii) the Pass Through Trustees, the Liquidity Provider and the Subordination
Agent have entered into the Intercreditor Agreement, dated as of the date hereof
(as amended, supplemented or otherwise modified from time to time, the
"Intercreditor Agreement");

              WHEREAS, concurrently with the execution and delivery of this
Agreement, American International Group, Inc. has executed two guarantee
agreements, each guaranteeing

                                       2
<PAGE>

the obligations of the initial Liquidity Provider under the related Liquidity
Facility;

              NOW, THEREFORE, in consideration of the foregoing premises and the
mutual agreements herein contained and other good and valuable consideration,
the receipt and adequacy of which are hereby acknowledged, the parties hereto
agree as follows:

              SECTION 1. Financing of Aircraft. (a) The Company confirms that
pursuant to the Aircraft Purchase Agreement with the Manufacturer, the
Manufacturer has agreed to deliver, or has delivered, the Aircraft in the months
specified in Schedule I-A hereto, all on and subject to terms and conditions
specified in the Aircraft Purchase Agreement. The Company agrees to finance the
Aircraft in the manner provided herein, all on and subject to the terms and
conditions hereof and of the relevant Financing Agreements.

              (b) In furtherance of the foregoing, the Company agrees to give
the parties hereto, the Liquidity Provider, the Depositary and the Rating Agency
not less than two Business Days' prior written notice in the form of the notice
set out in Exhibit B hereto (a "Delivery Notice") of the scheduled delivery date
(the "Scheduled Delivery Date") (or, in the case of a substitute Delivery Notice
under Section 1(e) or (g) hereof, one Business Day's prior notice) in respect of
each Aircraft under the applicable Aircraft Purchase Agreement, or in the case
of the utilization of bridge financing or sale/leaseback financing as
contemplated by Section 1(e) and (j) hereof in respect of any Aircraft, one
Business Day's prior notice of the date of the financing of such Aircraft
pursuant to the relevant Financing Agreements, which notice shall:

                  (i) specify whether such Aircraft is an ATA Aircraft or a GE
         Aircraft, whether the Company has elected to treat such Aircraft as a
         Leased Aircraft or an Owned Aircraft, and if a Leased Aircraft, whether
         the Lease is to be in the form of Exhibit A-2-1 or A-2-2 to this
         Agreement, subject to changes permitted under Section 1(c);

                  (ii) specify the Scheduled Delivery Date (if applicable) of
         such Aircraft (which shall be a Business Day before the Cut-off Date)
         and, except as provided in Section 1(e) hereof, the date (the "Funding
         Date") on which the financing therefor in the manner provided herein
         shall be consummated;

                  (iii) except in the case of an Aircraft with a Funding Date
         that is the Issuance Date, instruct the applicable Pass Through Trustee
         to execute and deliver to the relevant Escrow Agent a withdrawal
         certificate in the form of Annex A to Exhibit B hereto so as to provide
         a Notice of Purchase Withdrawal to the Depositary with respect to the
         Equipment Notes to be issued in connection with the financing of such
         Aircraft;

                  (iv) instruct the applicable Pass Through Trustee to enter
         into the Participation Agreement included in the Financing Agreements
         with respect to such Aircraft in such form and at such a time on or
         before the Funding Date specified in such Delivery Notice and to
         perform its obligations thereunder;

                                       3
<PAGE>

                  (v) specify the aggregate principal amount of each series of
         Equipment Notes to be issued and purchased by the Pass Through Trustees
         in connection with the financing of such Aircraft scheduled to be
         financed on such Funding Date (which shall in all respects comply with
         the Mandatory Economic Terms); and

                  (vi) if such Aircraft is to be a Leased Aircraft, certify that
         the related Owner Participant (A) is not an Affiliate of the Company
         and (B) based on the representations of such Owner Participant, is
         either (1) a Qualified Owner Participant or (2) any other person the
         obligations of which under the Owner Participant Agreements (as defined
         in the applicable Participation Agreement) are guaranteed by a
         Qualified Owner Participant.

Notwithstanding the foregoing, in the event the Issuance Date coincides with the
Scheduled Delivery Date or Funding Date of any Aircraft to be financed pursuant
to the terms hereof, the Delivery Notice therefor may be delivered on such
Scheduled Delivery Date or Funding Date, as the case may be.

              (c) Upon receipt of a Delivery Notice, the Pass Through Trustees
shall, and shall cause the Subordination Agent to, enter into and perform their
obligations under the Participation Agreement and other instructions specified
in such Delivery Notice, provided that such Participation Agreement and the
other Lease Financing Agreements or Owner Financing Agreements to be entered
into pursuant to such Participation Agreement shall be in the forms thereof
annexed hereto in all material respects with such changes therein as shall have
been requested by the Company or the related Owner Participant (in the case of
Lease Financing Agreements) or by the initial purchasers of the Series C
Equipment Notes or Class C Certificates (as defined in the Intercreditor
Agreement), agreed to by the Company and, if modified in any material respect as
regards the interests of the Certificateholders, as to which Rating Agency
Confirmation shall have been obtained by the Company from the Rating Agency (to
be delivered by the Company to the applicable Pass Through Trustee on or before
the relevant Delivery Date, it being understood that if Rating Agency
Confirmation shall have been received with respect to any Financing Agreements
and such Financing Agreements are utilized for subsequent Aircraft (or
Substitute Aircraft) without material modifications, no additional Rating Agency
Confirmation shall be required); provided, however, that the relevant Financing
Agreements as executed and delivered shall not vary the Mandatory Economic Terms
and shall contain the Mandatory Document Terms. Notwithstanding the foregoing,
if any Financing Agreement annexed hereto shall not have been reviewed by the
Rating Agency prior to the Issuance Date, then, prior to the use thereof in
connection with the financing of any Aircraft hereunder, the Company shall
obtain a Rating Agency Confirmation from the Rating Agency on or prior to the
relevant Funding Date. The Company shall pay the reasonable costs and expenses
of the Rating Agency in connection with obtaining the Rating Agency
Confirmation. With respect to each Aircraft, the Company shall cause WTC (or
such other person that meets the eligibility requirements to act as loan trustee
under the Leased Aircraft Indenture or Owned Aircraft Indenture) to execute as
Loan Trustee the Financing Agreements relating to such Aircraft to which such
Loan Trustee is intended to be a party, and the Company shall concurrently
therewith execute such Financing Agreements to which the Company is intended to
be a party and perform its respective obligations thereunder. Upon the request
of the Rating Agency, the Company shall

                                       4
<PAGE>

deliver or cause to be delivered to the Rating Agency a true and complete copy
of each Financing Agreement relating to the financing of each Aircraft together
with a true and complete set of the closing documentation (including legal
opinions) delivered to the related Loan Trustee, Subordination Agent and Pass
Through Trustee under the related Participation Agreement.

              (d) If after giving any Delivery Notice, there shall be a delay in
the delivery of an Aircraft, or if on the Scheduled Delivery Date or Funding
Date of an Aircraft the financing thereof in the manner contemplated hereby
shall not be consummated for whatever reason, the Company shall give the parties
hereto and the Depositary prompt notice thereof. Concurrently with the giving of
such notice of postponement or subsequently, the Company shall give the parties
hereto a substitute Delivery Notice specifying the date to which such delivery
and/or related financing shall have been re-scheduled (which shall be a Business
Day before the Cut-off Date on which the Escrow Agents shall be entitled to
withdraw one or more Deposits under each of the applicable Deposit Agreements to
enable each applicable Pass Through Trustee to fund its purchase of the related
Equipment Notes). Upon receipt of any such notice of postponement, each
applicable Pass Through Trustee shall comply with its obligations under Section
2.01(b) of each of the Pass Through Trust Agreements and thereafter the
financing of the relevant Aircraft shall take place on the re-scheduled Delivery
Date or Funding Date, as the case may be, therefor (all on and subject to the
terms and conditions of the relevant Financing Agreements) unless further
postponed as provided herein.

              (e) The Company shall have the right at any time on or before the
Scheduled Delivery Date or Funding Date of any Aircraft, and subsequent to its
giving a Delivery Notice therefor, to postpone the Scheduled Delivery Date or
Funding Date of such Aircraft so as to enable the Company to change its election
to treat such Aircraft as a Leased Aircraft or an Owned Aircraft by written
notice of such postponement to the other parties hereto. The Company shall
subsequently give the parties hereto a substitute Delivery Notice complying with
the provisions of Section 1(b) hereof and specifying the new Funding Date for
such postponed Aircraft (which shall be a Business Day occurring before the
Cut-off Date and on which the Escrow Agents shall be entitled to withdraw
Deposits under each of the applicable Deposit Agreements sufficient to enable
each applicable Pass Through Trustee to fund its purchase of the related
Equipment Notes). In addition, the Company shall have the further right to
accept delivery of an Aircraft under the Aircraft Purchase Agreement on the
Delivery Date thereof by utilization of bridge financing of such Aircraft and
promptly thereafter give the parties hereto a Delivery Notice specifying a
Funding Date on or before the later to occur of (i) the date 90 days after the
Issuance Date and (ii) the date 90 days after the Delivery Date of such
Aircraft, but in no event later than the Cut-off Date, and otherwise complying
with the provisions of Section 1(b) hereof. All other terms and conditions of
this Note Purchase Agreement shall apply to the financing of any such Aircraft
on the Funding Date or re-scheduled Funding Date therefor except (i) the Funding
Date or re-scheduled Funding Date shall be deemed the Delivery Date of such
Aircraft for all purposes of this Section 1, (ii) the related Financing
Agreements shall be amended to reflect the original delivery of such Aircraft to
the Company, (iii) where the Company owns the Aircraft under the bridge
financing, the related Financing Agreements shall be amended to reflect the
seller of such Aircraft, and the recipient of payment of the purchase price
therefor, as the Company, and (iv) in the case of a Leased Aircraft, the
Purchase Agreement

                                       5
<PAGE>

Assignment shall be modified to eliminate the assignment of the right to
purchase from the Manufacturer.

              (f) The Company shall have no liability for the failure of the
Pass Through Trustees to purchase Equipment Notes with respect to any Aircraft
or Substitute Aircraft, other than the Company's obligation, if any, to pay the
Deposit Make-Whole Premium pursuant to Section 4(a)(i) of this Agreement.

              (g) If (i) the Scheduled Delivery Date for any Aircraft is delayed
(x) more than 30 days beyond the last day of the month set forth opposite such
Aircraft under the heading "Scheduled Delivery Month" in Schedule I-A hereto or
(y) beyond September 29, 2002, or (ii) as a result of a downgrading of the
Company's corporate credit ratings, GECC has elected to exercise its contractual
rights not to act as an Owner Participant with respect to a GE Aircraft and
pursuant to the separate financing agreement between the Company and GECC, the
Company will not own or lease such GE Aircraft, the Company may identify, as a
substitute therefor, a Boeing aircraft of the same model as the Aircraft to be
replaced, which shall have the same specification and the same or higher
appraised value as the Aircraft to be replaced and shall be, or shall have been,
delivered in the same year as the Aircraft to be replaced was scheduled to be
delivered (a "Substitute Aircraft"), so long as (A) such financing occurs no
later than the Cut-off Date, (B) after giving effect thereto such substitution
does not vary the Mandatory Economic Terms and (C) the Company shall obtain
Rating Agency Confirmation in respect of the replacement of any Aircraft by a
Substitute Aircraft. Upon the satisfaction of the conditions set forth above
with respect to a Substitute Aircraft, the Aircraft to be replaced shall cease
to be subject to this Agreement and all rights and obligations of the parties
hereto concerning such Aircraft shall cease, and such Substitute Aircraft shall
be deemed to be an "Aircraft" and thereafter be subject to the terms and
conditions of this Agreement to the same extent as such Aircraft.

              (h) The parties agree that if, in connection with the delivery
and/or financing of an Aircraft or a Substitute Aircraft, any Owner Participant
who is to be a party to any Lease Financing Agreement shall not be a "citizen of
the United States" within the meaning of Section 40102(a)(15) of the Act, then
the applicable Lease Financing Agreements shall be modified, consistent with the
Mandatory Document Terms, to require such Owner Participant to enter into a
voting trust, voting powers or similar arrangement satisfactory to the Company
that (A) enables such Aircraft to be registered in the United States of America
and (B) complies with the FAA regulations issued under the Act applicable
thereto.

              (i) Anything herein to the contrary notwithstanding, (i) the
Company shall not have the right, and shall not be entitled, at any time to
request the issuance of Equipment Notes of any series to any Pass Through
Trustee in an aggregate principal amount in excess of the amount of the Deposits
then available for withdrawal by the Escrow Agent under and in accordance with
the provisions of the related Deposit Agreement; and (ii) if any Aircraft is not
delivered and financed by the Company under the Financing Agreements in its
respective Scheduled Delivery Month as set forth in Schedule I hereto then the
Company shall use reasonable efforts to assure that the aggregate amortization
schedule of the Equipment Notes

                                       6
<PAGE>

with respect to such Aircraft will correspond as closely as reasonably
practicable to the aggregate amortization schedule set forth in Schedule VII
hereto.

              (j) Notwithstanding the foregoing provisions of this Section 1,
(i) the Company shall have the right, with respect to any Owned Aircraft, to
enter into the transactions described in Section 8.3 of the relevant Owned
Aircraft Participation Agreement (a "Sale/Leaseback Transaction"), subject to
the restrictions set forth therein, and (ii) the Company shall have the right,
with respect to any Leased Aircraft, to enter into the transactions described in
Section 2.11 of the relevant Leased Aircraft Indenture, in each case involving
assumption and release of the obligations of the Company or the Owner Trustee,
subject to the restrictions set forth therein.

              Notwithstanding the foregoing clauses (i) and (ii), the Company
shall not have the right to enter into either such transaction referred to
therein, unless the Company (a) either (i) causes to be delivered to the Loan
Trustee an opinion of counsel reasonably satisfactory to the Loan Trustee to the
effect that the Certificateholders will not recognize income, gain or loss for
Federal income tax purposes as a result of such assumption and release and will
be subject to Federal income tax in the same amounts, in the same manner and at
the same time as would have been the case if such assumption and release had not
occurred or (ii) causes to be delivered to the Loan Trustee an opinion of
counsel to the effect that the Certificateholders should not recognize income,
gain or loss for Federal income tax purposes as a result of such assumption and
release and should be subject to Federal income tax in the same amounts, in the
same manner and at the same time as would have been the case if such assumption
and release had not occurred and provides an indemnification in favor of the
Certificateholders in form and substance reasonably satisfactory to the Pass
Through Trustees, (b) causes to be delivered to the Loan Trustee an opinion of
counsel reasonably satisfactory to the Loan Trustee that the Pass Through Trusts
will not be subject to Federal income taxation as a result of such assumption
and release and (c) obtains written confirmation from the Rating Agency that
such transaction will not result in (i) a reduction of the rating for any Class
of Certificates below the then current rating for such Class of Certificates or
(ii) a withdrawal or suspension of the rating of any Class of Certificates. In
addition, the Company agrees to otherwise comply with the provisions of Sections
1(c) and 2 hereof in connection with any Sale/Leaseback Transaction, or an
assumption of the Equipment Notes, as the case may be.

              SECTION 2. Conditions Precedent. The obligation of the Pass
Through Trustees to enter into, and to cause the Subordination Agent to enter
into, any Participation Agreement as directed pursuant to a Delivery Notice and
to perform its obligations thereunder is subject to satisfaction of the
following conditions:

              1. no Triggering Event shall have occurred; and

              2. the Company shall have delivered a certificate to each such
Pass Through Trustee and each Liquidity Provider stating that (i) such
Participation Agreement and the other Financing Agreements to be entered into
pursuant to such Participation Agreement do not vary

                                       7
<PAGE>

the Mandatory Economic Terms and contain the Mandatory Document Terms and (ii)
any modification of such Financing Agreements from the forms thereof attached to
this Agreement does not adversely affect the Certificateholders, and such
certification shall be true and correct.

              Anything herein to the contrary notwithstanding, the obligation of
each Pass Through Trustee to purchase Equipment Notes shall terminate on the
Cut-off Date.

              SECTION 3. Representations and Warranties. (a) The Company and the
Guarantor represent and warrant that:

                   (i) each of the Company and Guarantor is duly incorporated,
              validly existing and in good standing under the laws of the State
              of Indiana and has the full corporate power, authority and legal
              right under the laws of the State of Indiana to execute and
              deliver this Agreement, the Delayed Funding Implementation
              Agreement and each Financing Agreement to which it will be a party
              and to carry out the obligations of the Company and Guarantor
              under this Agreement, the Delayed Funding Implementation Agreement
              and each Financing Agreement to which it will be a party;

                   (ii) the execution and delivery by the Company and Guarantor
              of this Agreement and the Delayed Funding Implementation Agreement
              and the performance by each of the Company and Guarantor of its
              obligations under this Agreement and the Delayed Funding
              Implementation Agreement have been duly authorized by the Company
              and Guarantor and will not violate its Articles of Incorporation
              or by-laws or the provisions of any indenture, mortgage, contract
              or other agreement to which it is a party or by which it is bound;

                   (iii) each of this Agreement and the Delayed Funding
              Implementation Agreement constitutes the legal, valid and binding
              obligation of each of the Company and Guarantor, enforceable
              against it in accordance with its terms, except as the same may be
              limited by applicable bankruptcy, insolvency, reorganization,
              moratorium or similar laws affecting the rights of creditors
              generally and by general principles of equity, whether considered
              in a proceeding at law or in equity; and

                   (iv) the Company is a "citizen of the United States" as
              defined in Section 40102 of the Act.

              (b)  WTC represents and warrants that:

                   (i) WTC is duly incorporated, validly existing and in good
              standing under the laws of the State of Delaware and is a "citizen
              of the United States" as defined in Section 40102 of the Act, and
              has the full corporate power, authority and legal right under the
              laws of the State of Delaware and the United States of

                                       8
<PAGE>

              America pertaining to its banking, trust and fiduciary powers to
              execute and deliver this Agreement, the Delayed Funding
              Implementation Agreement and each Financing Agreement to which it
              will be a party and to carry out the obligations of WTC, in its
              capacity as Subordination Agent, Pass Through Trustee or Paying
              Agent, as the case may be, under this Agreement, the Delayed
              Funding Implementation Agreement and each Financing Agreement to
              which it will be a party;

                   (ii) the execution and delivery by WTC, in its capacity as
              Subordination Agent, Pass Through Trustee or Paying Agent, as the
              case may be, of this Agreement and the Delayed Funding
              Implementation Agreement and the performance by WTC, in its
              capacity as Subordination Agent, Pass Through Trustee or Paying
              Agent, as the case may be, of its obligations under this Agreement
              and the Delayed Funding Implementation Agreement have been duly
              authorized by WTC, in its capacity as Subordination Agent, Pass
              Through Trustee or Paying Agent, as the case may be, and will not
              violate its articles of association or by-laws or the provisions
              of any indenture, mortgage, contract or other agreement to which
              it is a party or by which it is bound; and

                   (iii) each of this Agreement and the Delayed Funding
              Implementation Agreement constitutes the legal, valid and binding
              obligations of WTC, in its capacity as Subordination Agent, Pass
              Through Trustee or Paying Agent, as the case may be, enforceable
              against it in accordance with its terms, except as the same may be
              limited by applicable bankruptcy, insolvency, reorganization,
              moratorium or similar laws affecting the rights of creditors
              generally and by general principles of equity, whether considered
              in a proceeding at law or in equity.

                  (c) The Pass Through Trustee hereby confirms to each of the
other parties hereto that its representations and warranties set forth in
Section 7.14 of each Pass Through Trust Agreement are true and correct as of the
date hereof.

                  (d) The Subordination Agent represents and warrants that:

                   (i) the Subordination Agent is duly incorporated, validly
              existing and in good standing under the laws of the State of
              Delaware, and has the full corporate power, authority and legal
              right under the laws of the State of Delaware and the United
              States of America pertaining to its banking, trust and fiduciary
              powers to execute and deliver this Agreement, the Delayed Funding
              Implementation Agreement and each Financing Agreement to which it
              is or will be a party and to perform its obligations under this
              Agreement, the Delayed Funding Implementation Agreement and each
              Financing Agreement to which it is or will be a party;

                                       9
<PAGE>

                   (ii) each of this Agreement and the Delayed Funding
              Implementation Agreement has been duly authorized, executed and
              delivered by the Subordination Agent; each of this Agreement and
              the Delayed Funding Implementation Agreement constitutes the
              legal, valid and binding obligations of the Subordination Agent
              enforceable against it in accordance with its terms, except as the
              same may be limited by applicable bankruptcy, insolvency,
              reorganization, moratorium or similar laws affecting the rights of
              creditors generally and by general principles of equity, whether
              considered in a proceeding at law or in equity;

                   (iii) none of the execution, delivery and performance by the
              Subordination Agent of this Agreement or the Delayed Funding
              Implementation Agreement contravenes any law, rule or regulation
              of the State of Delaware or any United States of America
              governmental authority or agency regulating the Subordination
              Agent's banking, trust or fiduciary powers or any judgment or
              order applicable to or binding on the Subordination Agent and do
              not contravene the Subordination Agent's articles of association
              or by-laws or result in any breach of, or constitute a default
              under, any agreement or instrument to which the Subordination
              Agent is a party or by which it or any of its properties may be
              bound;

                   (iv) neither the execution and delivery by the Subordination
              Agent of this Agreement or the Delayed Funding Implementation
              Agreement nor the consummation by the Subordination Agent of any
              of the transactions contemplated hereby or thereby requires the
              consent or approval of, the giving of notice to, the registration
              with, or the taking of any other action with respect to, any
              Delaware governmental authority or agency or any federal
              governmental authority or agency regulating the Subordination
              Agent's banking, trust or fiduciary powers;

                   (v) there are no Taxes payable by the Subordination Agent
              imposed by the State of Delaware or any political subdivision or
              taxing authority thereof in connection with the execution,
              delivery and performance by the Subordination Agent of this
              Agreement or the Delayed Funding Implementation Agreement (other
              than franchise or other taxes based on or measured by any fees or
              compensation received by the Subordination Agent for services
              rendered in connection with the transactions contemplated by the
              Intercreditor Agreement or any of the Liquidity Facilities), and
              there are no Taxes payable by the Subordination Agent imposed by
              the State of Delaware or any political subdivision thereof in
              connection with the acquisition, possession or ownership by the
              Subordination Agent of any of the Equipment Notes (other than
              franchise or other taxes based on or measured by any fees or
              compensation received by the Subordination Agent for services
              rendered in connection with the transactions contemplated by the
              Intercreditor Agreement or any of the Liquidity Facilities); and

                                       10
<PAGE>

                   (vi) there are no pending or threatened actions or
              proceedings against the Subordination Agent before any court or
              administrative agency which individually or in the aggregate, if
              determined adversely to it, would materially adversely affect the
              ability of the Subordination Agent to perform its obligations
              under this Agreement or the Delayed Funding Implementation
              Agreement.

              (e) The Escrow Agent represents and warrants that:

                   (i) the Escrow Agent is a national banking association duly
              incorporated, validly existing and in good standing under the laws
              of the United States of America and has the full corporate power,
              authority and legal right under the laws of the United States of
              America pertaining to its banking, trust and fiduciary powers to
              execute and deliver this Agreement, the Delayed Funding
              Implementation Agreement, each Deposit Agreement and each Escrow
              and Paying Agent Agreement (collectively, the "Escrow Agent
              Agreements") and to carry out the obligations of the Escrow Agent
              under each of the Escrow Agent Agreements;

                   (ii) the execution and delivery by the Escrow Agent of each
              of the Escrow Agent Agreements and the performance by the Escrow
              Agent of its obligations hereunder and thereunder have been duly
              authorized by the Escrow Agent and will not violate its articles
              of association or by-laws or the provisions of any indenture,
              mortgage, contract or other agreement to which it is a party or by
              which it is bound; and

                   (iii) each of the Escrow Agent Agreements constitutes the
              legal, valid and binding obligations of the Escrow Agent
              enforceable against it in accordance with its terms, except as the
              same may be limited by applicable bankruptcy, insolvency,
              reorganization, moratorium or similar laws affecting the rights of
              creditors generally and by general principles of equity, whether
              considered in a proceeding at law or in equity.

              (f) The Paying Agent represents and warrants that:

                   (i) the Paying Agent is duly incorporated, validly existing
              and in good standing under the laws of the State of Delaware and
              has the full corporate power, authority and legal right under the
              laws of the United States of America pertaining to its banking,
              trust and fiduciary powers to execute and deliver this Agreement,
              the Delayed Funding Implementation Agreement and the Escrow and
              Paying Agent Agreement (collectively, the "Paying Agent
              Agreements") and to carry out the obligations of the Paying Agent
              under each of the Paying Agent Agreements;

                   (ii) the execution and delivery by the Paying Agent of each
              of the Paying Agent Agreements and the performance by the Paying
              Agent of its

                                       11
<PAGE>

              obligations hereunder and thereunder have been duly authorized by
              the Paying Agent and will not violate its articles of association
              or by-laws or the provisions of any indenture, mortgage, contract
              or other agreement to which it is a party or by which it is bound;
              and

                   (iii) each of the Paying Agent Agreements constitutes the
              legal, valid and binding obligations of the Paying Agent
              enforceable against it in accordance with its terms, except as the
              same may be limited by applicable bankruptcy, insolvency,
              reorganization, moratorium or similar laws affecting the rights of
              creditors generally and by general principles of equity, whether
              considered in a proceeding at law or in equity.

              SECTION 4. Covenants. (a) The Company and the Guarantor each
covenant with each of the other parties hereto as follows.

                   (i) On the date that the Depositary is obligated to pay the
      amount of a Prepayment Withdrawal or the Final Withdrawal to the Paying
      Agent pursuant to a Deposit Agreement relating to any Trust, the Company
      shall pay to the Pass Through Trustee of such Trust no later than 12:30
      p.m. (New York time) an amount equal to the Deposit Make-Whole Premium, if
      any, in respect of such Prepayment Withdrawal or Final Withdrawal amount.

                   (ii) Subject to Section 4(a)(iv) of this Agreement, the
      Company shall at all times maintain its corporate existence and shall not
      wind-up, liquidate or dissolve or take any action, or fail to take any
      action, that would have the effect of any of the foregoing.

                   (iii) The Company shall at all times remain a U.S. Air
      Carrier (as defined in the Financing Agreements) and shall at all times be
      otherwise certificated and registered to the extent necessary to entitle
      (i) in the case of Leased Aircraft, the Owner Trustee (and the Loan
      Trustee as assignee of the Owner Trustee's rights under each Lease) to the
      rights afforded to lessors of aircraft equipment under Section 1110 and
      (ii) in the case of Owned Aircraft, the Loan Trustee to the rights
      afforded to secured parties of aircraft equipment under Section 1110.

                   (iv) Sections 5.01 and 5.02 of each Pass Through Trust
      Agreement are hereby incorporated by reference herein, mutatis mutandis.

                   (v) The Company agrees to provide written notice to (i) each
      of the parties hereto of the occurrence of the Cut-off Date no later than
      one Business Day after the date thereof and (ii) each of the parties
      hereto and the Depositary of any adjustments in the interest rate
      applicable to the Equipment Notes and the Certificates pursuant to the
      Registration Rights Agreement.

                                       12
<PAGE>

                   (vi) The Company shall not issue or cause or permit to be
      issued Series C Equipment Notes pursuant to any Owned Aircraft Indenture
      or Leased Aircraft Indenture unless it shall have obtained written
      confirmation from the Rating Agency that the issuance of such Series C
      Equipment Notes will not result in (i) a reduction of the rating for any
      Class of Certificates below the then current rating for such Class of
      Certificates or (ii) a withdrawal or suspension of the rating of any Class
      of Certificates. If such conditions to the issuance of Series C Equipment
      Notes are satisfied, the parties hereto agree to enter into such
      amendments and modifications to the Intercreditor Agreement, each Pass
      Through Trust Agreement and the other Financing Agreements as shall be
      reasonably requested by the Company to facilitate the issuance of the same
      and any Series C Pass Through Certificates; provided that such amendments
      and modifications (including those described in the following sentence)
      are reasonably satisfactory to the Purchasers. The Company will (i) cause
      the Indenture under which any Series C Equipment Notes are issued to
      provide for the subordination of the Series C Equipment Notes to the
      Series B Equipment Notes, the Series A Equipment Notes and the Liquidity
      Obligations (as defined in the Intercreditor Agreement) in the same manner
      as the Series B Equipment Notes are subordinated to the Series A Equipment
      Notes and the Liquidity Obligations and (ii) if Series C Equipment Notes
      are initially issued to other than the pass through trustee for the Class
      C Certificates (as defined in the Intercreditor Agreement), (A) cause such
      Series C Equipment Notes to be subject to the provisions of the
      Intercreditor Agreement that allow for the "Controlling Party" (as defined
      in the Intercreditor Agreement), during the continuance of an "Indenture
      Default" (as defined in the Intercreditor Agreement), to direct the Loan
      Trustee in taking action under the applicable Indenture and (B) cause the
      Indenture under which such Series C Equipment Notes are issued to include,
      in substance, the provisions set forth in Exhibit D to this Agreement.

                   (vii) On the Issuance Date, the Depositary's short term
      unsecured rating shall be A-1 from Standard & Poor's and P-1 from Moody's.
      If the Depositary's short term rating shall at any time fall below P-1
      from Moody's or A-1 from Standard & Poor's, the Company shall, within 15
      days of such occurrence, cause the Depositary to be replaced with a
      depositary bank (a "Replacement Depositary") on the following terms and
      conditions.

                       (I) The Replacement Depositary must have a short-term
              unsecured rating of at least A-1 from Standard & Poor's and P-1
              from Moody's and the Company shall have obtained and each
              Purchaser shall have received written confirmation from the Rating
              Agency that such replacement will not cause a reduction of any
              rating then in effect for any Class of Certificates by the Rating
              Agency (without regard to any downgrading of any rating of the
              Depositary being replaced).

                       (II) The Company shall pay all fees, expenses and other
              amounts then owing to the replaced Depositary.

                                       13
<PAGE>

                       (III) The Company shall cause the Escrow Agent and the
              Replacement Depositary to enter into a Replacement Deposit
              Agreement for each Class of Certificates and shall cause the
              Replacement Depositary to deliver to the Company, the Rating
              Agency and the Purchaser of such Class, legal opinions and other
              closing documentation substantially similar in scope and substance
              as those that were delivered by the Depositary being replaced in
              connection with the execution and delivery of the Deposit
              Agreement being replaced.

                       (IV) Upon satisfaction of the foregoing conditions, the
              Company shall instruct each Pass Through Trustee, and each Pass
              Through Trustee agrees, to execute and deliver to the Escrow Agent
              a duly completed Withdrawal Certificate together with a Notice of
              Replacement Withdrawal (as defined in the Escrow and Paying Agent
              Agreements).

                       (V) Each of the parties hereto agrees, at the Company's
              request and expense, to enter into any amendments to this
              Agreement, the Escrow and Paying Agent Agreements and any other
              Operative Agreements as may be necessary or desirable to give
              effect to the replacement of the Depositary with the Replacement
              Depositary and the replacement of the Deposit Agreements with the
              Replacement Deposit Agreements.

                       (VI) Upon the execution and delivery of the Replacement
              Deposit Agreements, the Replacement Depositary shall be deemed to
              be the Depositary with all of the rights and obligations of the
              Depositary hereunder and under the other Operative Agreements and
              the Replacement Deposit Agreements shall be deemed to be the
              Deposit Agreements hereunder and under the other Operative
              Agreements, except that the obligations of the replaced Depositary
              under the last two sentences of Section 2.2 of its Deposit
              Agreements or Section 2.2(a) of its Delayed Deposit Agreements
              shall remain in full force and effect notwithstanding the
              execution and delivery of the Replacement Deposit Agreements.

              (b) WTC, in its individual capacity, covenants with each of the
other parties to this Agreement that it will, immediately upon obtaining
knowledge of any facts that would cast doubt upon its continuing status as a
"citizen of the United States" as defined in Section 40102 of the Act and
promptly upon public disclosure of negotiations in respect of any transaction
which would or might adversely affect such status, notify in writing all parties
hereto of all relevant matters in connection therewith. Upon WTC giving any such
notice, WTC shall, subject to Section 8.02 of any Indenture then entered into,
resign as Loan Trustee in respect of such Indenture.

              SECTION 5. Notices. Unless otherwise specifically provided herein,
all notices, requests, demands, authorizations, directions, consents, waivers
and other communications required or permitted to be made, given, furnished or
filed hereunder by the terms hereof shall be

                                       14
<PAGE>

in English and in writing, and any such communication shall become effective
upon being delivered personally or, if promptly confirmed by mail, when received
by facsimile or other written telecommunication unless received outside of the
business hours, in which case on the following Business Day, addressed to such
party hereto at its address or facsimile number set forth below the signature of
such party on the signature pages of this Agreement (or such other address as
notified by such party to the other parties hereto).

              SECTION 6. Expenses. (a) The Company and the Guarantor jointly and
severally agree to pay to the Subordination Agent when due for application in
accordance with the Intercreditor Agreement an amount or amounts equal to the
fees payable to the relevant Liquidity Provider under Section 2.3 of each
Liquidity Facility and the related Fee Letter (as defined in the Intercreditor
Agreement) multiplied by a fraction the numerator of which shall be the then
outstanding aggregate amount of the Deposits under the Deposit Agreements and
the denominator of which shall be the sum of (x) the then outstanding aggregate
principal amount of the Series A Equipment Notes and Series B Equipment Notes
issued under all of the Indentures and (y) the then outstanding aggregate amount
of the Deposits under the Deposit Agreements.

              (b) So long as no Equipment Notes have been issued in respect of
any Aircraft relating to any Pass Through Trust Agreement, the Company and the
Guarantor jointly and severally agree to pay (i) to the Subordination Agent when
due (A) the amount equal to interest on any Downgrade Advance (other than any
Applied Downgrade Advance) payable under Section 3.7 of the Liquidity Facility
relating to such Pass Through Trust Agreement minus Investment Earnings while
such Downgrade Advance shall be outstanding, (B) the amount equal to interest on
any Non-Extension Advance (other than any Applied Non-Extension Advance) payable
under Section 3.7 of each such Liquidity Facility minus Investment Earnings
while such Non-Extension Advance shall be outstanding and (C) any other amounts
owed to the Liquidity Provider by the Subordination Agent as borrower under each
such Liquidity Facility (other than amounts due as repayment of advances
thereunder or as interest on such advances, except to the extent payable
pursuant to clause (A) or (B)), (ii) all compensation and reimbursement of
reasonable expenses, disbursements and advances payable by the Company under
each such Pass Through Trust Agreement, (iii) all compensation and reimbursement
of reasonable expenses and disbursements payable to the Subordination Agent
under the Intercreditor Agreement except with respect to any income or franchise
taxes incurred by the Subordination Agent in connection with the transactions
contemplated by the Intercreditor Agreement, and (iv) in the event the Company
requests any amendment to any Operative Agreement, all reasonable fees and
expenses (including, without limitation, fees and disbursements of counsel) of
the Escrow Agent, the Paying Agent in connection therewith. For purposes of this
Section 6(b), the terms "Applied Downgrade Advance", "Applied Non-Extension
Advance", "Downgrade Advance", "Investment Earnings" and "Non-Extension Advance"
shall have the meanings specified in each Liquidity Facility.

              SECTION 7. Further Assurances. Each party hereto shall duly
execute, acknowledge and deliver, or shall cause to be executed, acknowledged
and delivered, all such

                                       15
<PAGE>

further agreements, instruments, certificates or documents, and shall do and
cause to be done such further acts and things, in any case, as any other party
hereto shall reasonably request in connection with its administration of, or to
carry out more effectually the purposes of, or to better assure and confirm unto
it the rights and benefits to be provided under, this Agreement.

              SECTION 8. Miscellaneous. (a) Provided that the transactions
contemplated hereby have been consummated, and except as otherwise provided for
herein, the representations, warranties and agreements herein of the Company,
the Subordination Agent, the Escrow Agent, the Paying Agent and the Pass Through
Trustee, and the Company's, the Subordination Agent's, the Escrow Agent's, the
Paying Agent's and the Pass Through Trustee's obligations under any and all
thereof, shall survive the expiration or other termination of this Agreement and
the other agreements referred to herein.

              (b) This Agreement may be executed in any number of counterparts
(and each of the parties hereto shall not be required to execute the same
counterpart). Each counterpart of this Agreement, including a signature page
executed by each of the parties hereto, shall be an original counterpart of this
Agreement, but all of such counterparts together shall constitute one
instrument. Except as provided in Section 8(c) below, neither this Agreement nor
any of the terms hereof may be terminated, amended, supplemented, waived or
modified orally, but only by an instrument in writing signed by the party
against which the enforcement of the termination, amendment, supplement, waiver
or modification is sought. The index preceding this Agreement and the headings
of the various Sections of this Agreement are for convenience of reference only
and shall not modify, define, expand or limit any of the terms or provisions
hereof. The terms of this Agreement shall be binding upon, and shall inure to
the benefit of, the Company and its successors and permitted assigns, the Pass
Through Trustee and its successors as Pass Through Trustee (and any additional
trustee appointed) under any of the Pass Through Trust Agreements, the Escrow
Agent and its successors as Escrow Agent under the Escrow and Paying Agent
Agreements, the Paying Agent and its successors as Paying Agent under the Escrow
and Paying Agent Agreement and the Subordination Agent and its successors as
Subordination Agent under the Intercreditor Agreement.

              (c) Notwithstanding any provision of this Agreement, upon and
simultaneously with the issuance of the Additional Certificates (as defined in
the Delayed Funding Implementation Agreement), this Agreement shall be forthwith
amended as provided in the Delayed Funding Implementation Agreement, without any
need for further action on the part of any party hereto and without any consent
of any of the Certificateholders.

              (d) This Agreement is not intended to, and shall not, provide any
person not a party hereto (other than the Purchasers and each of the
beneficiaries of Section 6 hereof) with any rights of any nature whatsoever
against any of the parties hereto, and no person not a party hereto (other than
the Purchasers and each of the beneficiaries of Section 6 hereof) shall have any
right, power or privilege in respect of, or have any benefit or interest arising
out of, this Agreement. To the extent that this Agreement expressly confers
upon, gives or grants any right, power, privilege, benefit, interest, remedy or
claim to any of the beneficiaries of Section 6 hereof (including, but

                                       16
<PAGE>

not limited to rights, powers, privileges, benefits, interests, remedies and
claims under Section 6), each such party is hereby recognized as a third party
beneficiary hereunder and may enforce any such right, power, privilege, benefit,
interest, remedy or claim.

              SECTION 9. Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK. THIS AGREEMENT
IS BEING DELIVERED IN THE STATE OF NEW YORK.

              SECTION 10. Subordination Agent's Liability. Notwithstanding
anything contained herein to the contrary, it is expressly understood and agreed
by the parties hereto that (a) this Agreement is executed and delivered by
Wilmington Trust Company in connection with its role as Pass Through Trustee and
Subordination Agent, not individually or personally but solely as Pass Through
Trustee and Subordination Agent, in the exercise of the powers and authority
conferred and vested in it under the Pass Through Trust Agreement and the
Intercreditor Agreement (b) each of the representations, undertakings and
agreements herein made on the part of the Pass Through Trustee or Subordination
Agent is made and intended not as personal representations, undertakings and
agreements by Wilmington Trust Company but is made and intended for the purpose
for binding only the Pass Through Trustee or Subordination Agent, as the case
may be, and (c) under no circumstances shall Wilmington Trust Company be
personally liable for the payment of any indebtedness or expenses of the Pass
Through Trustee or Subordination Agent, or be liable for the breach or failure
of any obligation, representation, warranty or covenant made or undertaken by
the Pass Through Trustee or Subordination Agent under this Agreement or the
other related documents.

                                       17
<PAGE>

                  IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be duly executed by their respective officers thereunto duly
authorized as of the day and year first above written.

                          AMERICAN TRANS AIR, INC.

                          By
                            ---------------------------------
                            Name:
                            Title:
                            Address:  7337 West Washington Street
                                      Indianapolis, Indiana 46231

                            Attention: Treasurer
                            Facsimile: (317) 240-7091

                          AMTRAN, INC.,
                          as Guarantor

                          By
                            ---------------------------------
                            Name:
                            Title:
                            Address:  7337 West Washington Street
                                      Indianapolis, Indiana 46231

                            Attention: Treasurer
                            Facsimile: (317) 240-7091

                                                       WILMINGTON TRUST COMPANY,

<PAGE>

                           not in its individual capacity, except as otherwise
                           provided herein, but solely as Pass Through Trustee

                           By
                              ---------------------------------
                              Name:
                              Title:
                              Address:  Rodney Square North
                                        1100 North Market Street,
                                        Wilmington, Delaware  19890

                              Attention:  Corporate Trust Admin.
                              Facsimile: (302) 636-4140

                           WILMINGTON TRUST COMPANY,
                           not in its individual capacity, except as otherwise
                           provided herein, but solely as Subordination Agent

                           By
                              ---------------------------------
                              Name:
                              Title:
                              Address:  Rodney Square North
                                        1100 North Market Street,
                                        Wilmington, Delaware  19890

                              Attention:  Corporate Trust Admin.
                              Facsimile: (302) 636-4140

                                                     WELLS FARGO BANK NORTHWEST,

<PAGE>

                            NATIONAL ASSOCIATION
                            as Escrow Agent

                            By
                               -----------------------------------------
                                 Name:
                                 Title:
                                 Address: 79 South Main Street, 3rd Floor
                                          Salt Lake City, Utah 84111

                                 Attention:  Corporate Trust Department
                                 Facsimile:  (801) 246-5053

                           WILMINGTON TRUST COMPANY,

                           not in its individual capacity, except as otherwise
                           provided herein, but solely as Paying Agent

                            By
                              ---------------------------------
                              Name:
                              Title:
                              Address:  Rodney Square North
                                        1100 North Market Street,
                                        Wilmington, Delaware  19890

                              Attention:  Corporate Trust Admin.
                              Facsimile: (302) 636-4140

<PAGE>

                                 SCHEDULE I-A to
                             Note Purchase Agreement

                     AIRCRAFT AND SCHEDULED DELIVERY MONTHS

<TABLE>
<CAPTION>
                                Aircraft         Manufacturer's Serial    Scheduled Delivery        ATA Aircraft/
     Aircraft Type             Tail Number               Number                  Month               GE Aircraft
     -------------             -----------               ------                  -----               -----------
<S>                               <C>                    <C>                 <C>                    <C>
     Boeing 737-800              N316TZ                  32609               January 2002           ATA Aircraft
     Boeing 737-800              N320TZ                  32610                April 2002            ATA Aircraft
     Boeing 737-800              N322TZ                  32611                 May 2002             ATA Aircraft
     Boeing 737-800              N324TZ                  32882                 June 2002             GE Aircraft
     Boeing 737-800              N325TZ                  32884                 July 2002             GE Aircraft
</TABLE>

<PAGE>

                                 SCHEDULE I-B to
                             Note Purchase Agreement

                     AIRCRAFT AND SCHEDULED DELIVERY MONTHS

<TABLE>
<CAPTION>
                                Aircraft         Manufacturer's Serial    Scheduled Delivery        ATA Aircraft/
     Aircraft Type             Tail Number               Number                  Month               GE Aircraft
     -------------             -----------               ------                  -----               -----------
<S>                             <C>                    <C>                 <C>                     <C>
     Boeing 737-800              N316TZ                  32609               January 2002           ATA Aircraft
     Boeing 737-800              N320TZ                  32610                April 2002            ATA Aircraft
     Boeing 737-800              N322TZ                  32611                 May 2002             ATA Aircraft
     Boeing 737-800              N324TZ                  32882                 June 2002             GE Aircraft
     Boeing 737-800              N325TZ                  32884                 July 2002             GE Aircraft
     Boeing 737-800              N326TZ                  32612               October 2002           ATA Aircraft
     Boeing 737-800              N327TZ                  32613               November 2002          ATA Aircraft
     Boeing 737-800              N328TZ                  32614               November 2002          ATA Aircraft
     Boeing 737-800              N329TZ                  32615               December 2002          ATA Aircraft
</TABLE>

<PAGE>

                                 SCHEDULE II to
                             Note Purchase Agreement

                          PASS THROUGH TRUST AGREEMENTS

Pass Through Trust Agreement dated as of the Issuance Date among the Company,
the Guarantor and the Pass Through Trustee in respect of American Trans Air
2002-1A Pass Through Trust.

Pass Through Trust Agreement dated as of the Issuance Date among the Company,
the Guarantor and the Pass Through Trustee in respect of American Trans Air
2002-1B Pass Through Trust.

<PAGE>

                                SCHEDULE III-A to
                             Note Purchase Agreement

                               DEPOSIT AGREEMENTS

Deposit Agreement (Class A) dated as of the Issuance Date between the Depositary
and the Escrow Agent.

Deposit Agreement (Class B) dated as of the Issuance Date between the Depositary
and the Escrow Agent.

<PAGE>

                                SCHEDULE III-B to
                             Note Purchase Agreement

                           DELAYED DEPOSIT AGREEMENTS

Delayed Deposit Agreement (Class A) dated as of the Issuance Date between the
Depositary and the Escrow Agent.

Delayed Deposit Agreement (Class B) dated as of the Issuance Date between the
Depositary and the Escrow Agent.

<PAGE>

                                 SCHEDULE IV to
                             Note Purchase Agreement

                       ESCROW AND PAYING AGENT AGREEMENTS

Escrow and Paying Agent Agreement (Class A) dated as of the Issuance Date among
the Escrow Agent, the Purchaser named therein, the Pass Through Trustee and the
Paying Agent.

Escrow and Paying Agent Agreement (Class B) dated as of the Issuance Date among
the Escrow Agent, the Purchaser named therein, the Pass Through Trustee and the
Paying Agent.

<PAGE>

                                  SCHEDULE V to
                             Note Purchase Agreement

                            MANDATORY DOCUMENT TERMS

         The terms "Trust Indenture Form", "Lease Form" and "Participation
Agreement Form" shall have the respective meanings specified in Schedule VI to
the Note Purchase Agreement.

1.      May not modify in any material adverse respect the Granting Clause of
        the Trust Indenture Form so as to deprive the Note Holders of a first
        priority security interest in and mortgage lien on the Aircraft and the
        Lease or to eliminate any of the obligations secured thereby or
        otherwise modify in any material adverse respect as regards the
        interests of the Note Holders, the Subordination Agent, the Liquidity
        Providers or the Indenture Trustee or the Loan Trustee, the provisions
        of (x) Article II or III or Section 4.02, 4.03, 4.04, 5.02, 5.06,
        9.01(b), 10.04, 10.11 or 10.12 of the Leased Aircraft Trust Indenture
        Form, (y) Article II or III or IV, Section 5.01, 5.02, 6.02, 10.01(a),
        11.04, 11.11 or 11.12 of the Owned Aircraft Trust Indenture Form or (z)
        the definition of "Make-Whole Amount" contained in Annex A to the Trust
        Indenture Form.

2.      May not modify in any material adverse respect as regards the interests
        of the Note Holders, the Subordination Agent, the Liquidity Providers or
        the Indenture Trustee, the provisions of Section 3.2.1(e), 3.3(c), 4.7,
        7.1.1, 10.3.1(d)(2), 13.3, 16, 17.3, 18.3 or 18.7 of the Lease Form or
        otherwise modify the terms of the Lease Form so as to deprive the
        Indenture Trustee of rights expressly granted to the "Mortgagee"
        therein.

3.      (a) May not modify in any material adverse respect as regards the
        interests of the Note Holders, the Subordination Agent, the Liquidity
        Providers or the Indenture Trustee, the provisions of Section 5.1.9,
        5.1.10, 5.1.11, 5.1.12, 7.1.5, 7.5, 12, 15.8(a), 15.9 or 15.10 of the
        Leased Aircraft Participation Agreement Form, or the provisions of
        Section 5.1.2(u) or 10.1.1(a)(4) of the Leased Aircraft Participation
        Agreement so as to eliminate the requirement to deliver to the Loan
        Participant or the Indenture Trustee, as the case may be, the legal
        opinions to be provided to such Persons thereunder (recognizing that the
        lawyers rendering such opinions may be changed) or of the provisions of
        Section 7.6.11(a)(5) of the Leased Aircraft Participation Agreement Form
        as regards the rights of the Indenture Trustee thereunder or the
        provisions of Section 5.1.5 so as to deprive the Note Holders of a first
        priority security interest as provided therein and mortgage lien on the
        Aircraft and the Lease or otherwise modify the terms of the Leased
        Aircraft Participation Agreement Form to deprive the Trustees, the
        Subordination Agent, the Liquidity Providers or the Indenture Trustee of
        any indemnity or right of reimbursement in its favor for Expenses or
        Taxes.

        (b) May not modify in any material adverse respect as regards the
        interests of the Note Holders, the Subordination Agent, the Liquidity
        Providers or the Loan Trustee, the provisions of Section 3.1.8, 3.1.9,
        3.1.10, 3.1.11, 5.1.5, 5.3, 9, 11.8(a),11.9 or 11.10 of the Owned
        Aircraft Participation Agreement Form or the provisions of 3.1.2(i) or
        8.3 of the

<PAGE>

        Owned Aircraft Participation Agreement Form so as to eliminate the
        requirement to deliver to the Loan Participant, the Loan Trustee or
        Certificateholders, as the case may be, the legal opinions to be
        provided to such Persons thereunder (recognizing that the lawyers
        rendering such opinions may be changed) or of the provisions of Section
        5.4.5(a)(4) of the Owned Aircraft Participation Agreement Form as
        regards the rights of the Loan Trustee thereunder or the provisions of
        Section 3.1.3 so as to deprive the Noteholders of a first priority
        security interest as provided therein and mortgage lien on the Aircraft
        or otherwise modify the terms of the Owned Aircraft Participation
        Agreement Form to deprive the Trustees, the Subordination Agent, the
        Liquidity Providers or the Loan Trustee of any indemnity or right of
        reimbursement in its favor for Expenses or Taxes.

4.      May not modify, in any material adverse respect as regards the interests
        of the Note Holders, the Subordination Agent, the Liquidity Providers,
        the Indenture Trustee or the Loan Trustee, the definition of "Deposit
        Make-Whole Premium" in Annex A to the Note Purchase Agreement.

        Notwithstanding the foregoing, any such Mandatory Document Term may be
modified to correct or supplement any such provision which may be defective or
to cure any ambiguity or correct any mistake, provided that any such action
shall not materially adversely affect the interests of the Note Holders, the
Subordination Agent, the Liquidity Providers, the Indenture Trustee or the Loan
Trustee or the Certificateholders.

<PAGE>

                                 SCHEDULE VI to
                             Note Purchase Agreement

                            MANDATORY ECONOMIC TERMS

Equipment Notes

Obligor: American Trans Air, Inc. or an Owner Trust

Maximum Principal Amount:

The aggregate original principal amount of all Equipment Notes for all Aircraft
shall not exceed the aggregate face amount of all Certificates issued on the
Issuance Date. The aggregate original principal amount of all Equipment Notes of
any series shall not exceed the aggregate face amount of all Certificates of the
related class issued on the Issuance Date.

Initial loan to aircraft value (with the value of any Aircraft equal to the
value for such Aircraft set forth in the Private Placement Memorandum in
"Summary - The Offering - Secured Promissory Notes and the Aircraft" under the
column "Appraised Base Value"):

         Series A:   not in excess of 51%
         Series B:   not in excess of 66%

The loan to aircraft value for each series of Equipment Notes issued in respect
of each Aircraft (computed (i) after aggregating the principal amount of all
series of Equipment Notes that rank senior to the series of Equipment Notes for
which loan to aircraft value is being calculated and (ii) as of the date of the
issuance thereof on the basis of the Assumed Appraised Value of such Aircraft
and the Depreciation Assumption (as defined in the Private Placement Memorandum
in the Glossary) must not exceed as of any Regular Distribution Date thereafter
(assuming no default in the payment of the Equipment Notes) the following
amounts:

         Series A:   not in excess of 51%
         Series B:   not in excess of 66%

Initial average life (in years)

                  Series A:  not extend beyond 8 years from the Issuance Date
                  Series B:  not extend beyond 5 years from the Issuance Date

Average life (in years)

         As of the Delivery Period Termination Date (or if earlier, the date of
         the occurrence of a Triggering Event), the average life of the Class A
         Certificates and the Class B Certificates shall not exceed,
         respectively, 7.49 to 7.69 years from the Issuance Date, subject to
         final reoptimization, and 4 years from the Issuance Date (computed
         without regard to the acceleration of any Equipment Notes

<PAGE>

         and after giving effect to any special distribution on the Certificates
         thereafter required in respect of unused Deposits).

Amortization Schedule

         The amortization schedule for each Series of Equipment Notes, assuming
         the maximum amount thereof in respect of all of the Aircraft are
         purchased by the Pass Through Trusts and all Aircraft are delivered as
         currently scheduled shall be as set forth in Schedule VII of the Note
         Purchase Agreement.

Final Maturity Date

         Series A:  November 20, 2014

         Series B:  August 20, 2009

Debt Rate (computed on the basis of a 360-day year consisting of twelve 30-day
months, payable semi-annually in arrears)

         Series A:  8.328 %
         Series B:  0.699 %

Payment Dates:             February 20, May 20, August 20 and November 20

Make-Whole Premiums:       as provided in Section 1.01 of the forms of Trust
                           Indenture marked as Exhibit A-3 and C-2 of the Note
                           Purchase Agreement (the "Trust Indenture Form")

Redemption and Purchase:   as provided in Article II of the Trust Indenture Form

Lease

Term:                      The Base Lease Term shall expire by its terms on or
                           after final maturity date of the related Series A
                           Equipment Notes

Lease                      Payment Dates: February 20, May 20, August 20 and
                           November 20

Minimum                    Rent: Basic Rent due and payable on each Payment Date
                           shall be at least sufficient to pay in full, as of
                           such Payment Date (assuming timely payment of the
                           related Equipment Notes prior to such Date), the
                           aggregate principal amount of scheduled installments
                           due on the related Equipment Notes outstanding on
                           such Payment Date together with accrued and unpaid
                           interest thereon

<PAGE>

Supplemental Rent:         Sufficient to cover the sums described in clauses (1)
                           through (6) of such term as defined in Section 1 of
                           the forms of Leases (the "Lease Form") marked as
                           Exhibits A-2-1 and A-2-2 of the Note Purchase
                           Agreement

Stipulated Loss Value:     At all times equal to or greater than the then
                           outstanding principal amount of the related Equipment
                           Notes plus, for any date other than a Lease Payment
                           Date, accrued interest thereon

EBO Price:                 Equal to or greater than the then-current Stipulated
                           Loss Value

Termination Value:         At all times equal to or greater than the then
                           outstanding principal amount of the related Equipment
                           Notes plus, for any date other than a Lease Payment
                           Date, accrued interest thereon

All-risk hull insurance:   not less than Stipulated Loss Value, subject to
                           Lessee's right to self-insure on terms no more
                           favorable to Lessee in any material respect than
                           those set forth in Section 11 of the Lease Form

Minimum Liability
Insurance Amount:          as set forth in Schedule I of the Lease Form

Past Due Rate:             as set forth in Schedule 1 of the Lease Form

Participation Agreement Loan Trustee, Subordination Agent, Liquidity Providers,
Pass Through Trustees, Escrow Agents and Note Holders indemnified against
Expenses and Taxes to the extent set forth in Section 9 of the form of the
Participation Agreement (the "Leased Aircraft Participation Form") marked as
Exhibit A-1 to the Note Purchase Agreement and Section 7 of the form of the
Participation Agreement (the "Owned Aircraft Participation Form") marked as
Exhibit C-1 of the Note Purchase Agreement.

<PAGE>

NYDOCS01/804539.17

                                 SCHEDULE VII to
                             Note Purchase Agreement

                         AGGREGATE AMORTIZATION SCHEDULE

<TABLE>
<CAPTION>
                              Class A                  Class A                  Class B                 Class B
                         Secured Promissory             Trust             Secured Promissory             Trust
                          Notes Scheduled             Expected              Notes Scheduled             Expected
                              Payments                  Pool                   Payments                   Pool
       Dates                of Principal               Factor                of Principal                Factor
-------------------- --------------------------- -------------------- ---------------------------- -------------------
<S>                         <C>                      <C>                      <C>                      <C>
    20-Feb-03               $797,262.60              0.9928635                $249,290.61              0.9919922
    20-May-03               813,861.61               0.9855784                255,958.51               0.9837702
    20-Aug-03               144,563.13               0.9842844                336,071.96               0.9729748
    20-Nov-03                  0.00                  0.9842844                492,633.99               0.9571503
    20-Feb-04              3,419,206.66              0.9536781               6,125,149.72              0.7603962
    20-Feb-05              3,419,397.00              0.9230702               7,237,877.00              0.5278988
    20-Feb-06              3,419,397.00              0.8924622               8,389,428.19              0.2584109
    20-Feb-07              5,735,134.56              0.8411255               7,305,552.92              0.0237396
    20-Feb-08              13,528,939.00             0.7200243                739,037.10               0.0000000
    20-Feb-09              15,540,047.35             0.5809212                   0.00                  0.0000000
    20-Feb-10              16,742,757.16             0.4310523                   0.00                  0.0000000
    20-May-10                55,528.86               0.4305552                   0.00                  0.0000000
    20-Aug-10                56,684.98               0.4300478                   0.00                  0.0000000
    20-Nov-10                57,865.16               0.4295298                   0.00                  0.0000000
    20-Feb-11              17,094,882.41             0.2765089                   0.00                  0.0000000
    20-May-11               414,985.36               0.2727943                   0.00                  0.0000000
    20-Aug-11               423,625.36               0.2690023                   0.00                  0.0000000
    20-Nov-11               432,445.23               0.2651314                   0.00                  0.0000000
    20-Feb-12              17,477,261.25             0.1086877                   0.00                  0.0000000
    20-May-12               805,325.33               0.1014790                   0.00                  0.0000000
    20-Aug-12               822,092.20               0.0941202                   0.00                  0.0000000
    20-Nov-12               839,208.17               0.0866083                   0.00                  0.0000000
    20-Feb-13              9,675,529.62              0.0000000                   0.00                  0.0000000
</TABLE>

<PAGE>

                                   ANNEX A to
                             Note Purchase Agreement

                                   DEFINITIONS

"Act" means 49 U.S.C. (ss.ss.) 40101-46507.

"Affiliate" means, with respect to any person, any other person directly or
indirectly controlling, controlled by or under common control with such person.
For purposes of this definition, "control" means the power, directly or
indirectly, to direct or cause the direction of the management and policies of
such person, whether through the ownership of voting securities or by contract
or otherwise and "controlling," "controlled by" and "under common control with"
have correlative meanings.

"Aircraft" means, prior to the Delayed Funding Date, the Boeing 737-800 aircraft
listed in Schedule I-A hereto and, on and after the Delayed Funding Date, the
Boeing 737-800 aircraft listed in Schedule I-B hereto (in each case, together
with any Substitute Aircraft substituted therefor in accordance with Section
1(g).

"Aircraft Purchase Agreement" means either the ATA Aircraft Purchase Agreement
or the GE Aircraft Purchase Agreement.

"Assumed Amortization Schedule" means Schedule VII to the Note Purchase
Agreement, as such schedule may be amended from time to time in accordance with
the Note Purchase Agreement.

"ATA Aircraft" means any Aircraft to be delivered under the ATA Aircraft
Purchase Agreement.

"ATA Aircraft Purchase Agreement" means the Purchase Agreement No. 2262 dated
June 30, 2000, between the Company and the Manufacturer, as amended (including
all exhibits thereto, together with all letter agreements entered into that by
their terms constitute part of any such Purchase Agreement).

"Average Life Date" means, for any Equipment Note, the date which follows the
time of determination by a period equal to the Remaining Weighted Average Life
of such Equipment Note.

"Bankruptcy Code" means the United States Bankruptcy Code, 11 U.S.C. (Section)
101 et seq.

"Business Day" means any day, other than a Saturday, Sunday or other day on
which commercial banks are authorized or required by law to close in New York,
New York, Indianapolis, Indiana, Wilmington, Delaware or Salt Lake City, Utah.

<PAGE>

"Certificate" has the meaning set forth in the third recital to the Note
Purchase Agreement.

"Certificateholder" means the Person in whose name a Certificate is registered
in the Register.

"Class" means the class of Certificates issued by each Pass Through Trust.

"Class A Certificates" has the meaning specified in the Intercreditor Agreement.

"Class B Certificates" has the meaning specified in the Intercreditor Agreement.

"Company" means American Trans Air, Inc., an Indiana corporation.

"Corporate Trust Office" with respect to any Pass Through Trustee or any Loan
Trustee, means the office of such trustee in the city at which at any particular
time its corporate trust business shall be principally administered.

"Cut-off Date" means the earlier of (a) the day after the Delivery Period
Termination Date and (b) the date on which a Triggering Event occurs.

"Delayed Deposit Agreements" means the Delayed Deposit Agreements set forth as
Schedule III-B hereto, as amended, supplemented or otherwise modified from time
to time in accordance with their respective terms and, from and after the
transfer of the Deposits to a Replacement Depositary, shall refer to the
corresponding Replacement Deposit Agreements between the Escrow Agent and the
Replacement Depositary.

"Delayed Funding Date" has the meaning set forth in the Delayed Funding
Implementation Agreement.

"Delayed Funding Implementation Agreement" has the meaning set forth in the
fifth recital to the Note Purchase Agreement.

"Delivery Date" means the Business Day on which an Aircraft is delivered to and
accepted by the Company or the Owner Trustee, as the case may be.

"Delivery Period Termination Date" means the earlier of (a) September 29, 2002
and (b) the date on which Equipment Notes with respect to all Aircraft (or
Substitute Aircraft in lieu thereof) have been purchased by the Trusts in
accordance with the Note Purchase Agreement.

"Deposit" has the meaning set forth in the respective Deposit Agreement.

"Deposit Agreements" means (i) prior to the Delayed Funding Date (as defined in
the Delayed Funding Implementation Agreement), the Deposit Agreements set forth
on Schedule III-A hereto, as amended, supplemented or otherwise modified from
time to time in accordance with its respective terms, and, from and after the
transfer of the Deposits to a Replacement Depositary, shall refer to the
corresponding Replacement Deposit Agreements between the Escrow Agent and

<PAGE>

the Replacement Depositary, and (ii) on and after the Delayed Funding Date, the
Deposit Agreements set forth on Schedule III-A hereto (to the extent of any
payment to be made by the Depositary thereunder on or after the Delayed Funding
Date) and the Delayed Deposit Agreements.

"Deposit Make-Whole Premium" means, with respect to the distribution of unused
Deposits to holders of any Class of Certificates, as of any date of
determination, (i) in the case of the Final Withdrawal of such unused Deposits,
subject to the proviso of this definition, an amount equal to the excess, if
any, of (a) the present value of the excess of (A) the scheduled payment of
principal and interest to maturity of the related series of Equipment Notes,
assuming the maximum principal amount thereof (the "Maximum Amount") minus any
Non-Premium Amount applicable to such Class of Certificates and such Class of
Certificates' Pro Rata Share of the Par Redemption Amount were issued, on each
remaining Regular Distribution Date for such Class under the Assumed
Amortization Schedule (assuming for purposes of giving effect to the subtraction
above, if such Class of Certificates' Pro Rata Share is greater than zero, that
each scheduled payment of principal on such Schedule is reduced in an amount
equal to such scheduled payment multiplied by a fraction, the numerator of which
shall be the Pro Rata Share and the denominator of which shall be the Maximum
Amount) over (B) the scheduled payment of principal and interest to maturity of
the Equipment Notes actually acquired by the Pass Through Trustee for such Class
on each such Regular Distribution Date, such present value computed by
discounting such excess on a quarterly basis on each Regular Distribution Date
(assuming a 360-day year of twelve 30-day months) using a discount rate equal to
the Treasury Yield plus 3.105% in the case of the Class A Certificates and
6.402% in the case of the Class B Certificates over (b) the amount of such
unused Deposits to be distributed to the holders of such Certificates minus any
Non-Premium Amount applicable to such Class of Certificates and such Class of
Certificates' Pro Rata Share of the Par Redemption Amount (the remainder of such
subtraction, the "Net Deposits") plus accrued and unpaid interest on the Net
Deposits to but excluding such date of determination from and including the
preceding Regular Distribution Date (or if such date of determination precedes
the first Regular Distribution Date, the Issuance Date), and (ii) in the case of
a Prepayment Withdrawal of such unused Deposits, an amount equal to the excess,
if any, of (a) the present value of the scheduled payment of principal and
interest to maturity of the related series of Equipment Notes in the principal
amount equal to the amount of such unused Deposits on each remaining Regular
Distribution Date for such Class under the Assumed Amortization Schedule (such
present value being computed by discounting such principal and interest payments
on a quarterly basis on each Regular Distribution Date (assuming a 360-day year
of twelve 30-day months) using a discount rate equal to the Treasury Yield) over
(b) the amount of such unused Deposits to be distributed to the holders of such
Certificates plus accrued and unpaid interest on such Deposits to but excluding
such date of determination from and including the preceding Regular Distribution
Date (or if such date of determination precedes the first Regular Distribution
Date, the Issuance Date); provided that the amount of Deposit Make-Whole Premium
payable with respect to a portion of any unused Deposits to be distributed as
the Final Withdrawal shall be calculated in accordance with clause (ii) above as
if the distribution of such portion of unused Deposits constituted a Prepayment
Withdrawal, if the conditions specified in Section 2.02(b) of the Pass Through
Trust Agreements are satisfied with

<PAGE>

respect to such portion of unused Deposits and the Company could have
distributed such portion of unused Deposits as a Prepayment Withdrawal .

"Depositary" IntesaBCI, S.p.A, New York Branch, and, from and after the transfer
of the Deposits to a Replacement Depositary, shall mean such Replacement
Depositary.

"Equipment Notes" means and includes any equipment notes issued under any
Indenture in the form specified in Section 2.01 thereof (as such form may be
varied pursuant to the terms of such Indenture) and any Equipment Note issued
under any Indenture in exchange for or replacement of any other Equipment Note.

"Escrow Agent" has the meaning set forth in the first paragraph of the Note
Purchase Agreement.

"Escrow and Paying Agent Agreement" has the meaning set forth in the fifth
recital to the Note Purchase Agreement.

"FAA" means the Federal Aviation Administration of the United States of America.

"Final Withdrawal" with respect to each Escrow and Paying Agent Agreement, has
the meaning set forth in Section 1.02 thereof.

"Financing Agreements" means, collectively, the Lease Financing Agreements and
the Owner Financing Agreements.

"Funding Date" has the meaning set forth in Section 1(b) (ii) of the Note
Purchase Agreement.

"GE Aircraft" means any Aircraft to be delivered under the GE Aircraft Purchase
Agreement.

"GE Aircraft Purchase Agreement" means the Purchase Agreement No. 1905 dated
April 25, 1996 between GECC and the Manufacturer, as amended (including all
exhibits thereto, together with all letter agreements entered into that by the
terms constitute part of any such Purchase Agreement).

"GECC" means General Electric Capital Corporation, a Delaware corporation.

"Government Entity" means (a) any federal, state, provincial or similar
government, and any body, board, department, commission, court, tribunal,
authority, agency or other instrumentality of any such government or otherwise
exercising any executive, legislative, judicial, administrative or regulatory
functions of such government or (b) any other government entity having
jurisdiction over any matter contemplated by the Operative Agreements or
relating to the observance or performance of the obligations of any of the
parties to the Operative Agreements.

"Guarantor" has the meaning set forth in the first paragraph of the Note
Purchase Agreement.

<PAGE>

"H.15(519)" means the weekly statistical release designated as such, or any
successor publication, published by the Board of Governors of the Federal
Reserve System.

"Indentures" means, collectively, the Leased Aircraft Indentures and the Owned
Aircraft Indentures.

"Intercreditor Agreement" has the meaning set forth in the tenth recital to the
Note Purchase Agreement.

"Issuance Date" means March 28, 2002.

"Law" means (a) any constitution, treaty, statute, law, decree, regulation,
order, rule or directive of any Government Entity, and (b) any judicial or
administrative interpretation or application of, or decision under, any of the
foregoing.

"Lease" means a Lease Agreement substantially in the form of Exhibit A-2-1 or
A-2-2 to the Note Purchase Agreement.

"Lease Financing Agreements" means, collectively, the applicable Purchase
Agreement Assignment, the Leased Aircraft Participation Agreement, the
applicable Lease, the Leased Aircraft Indenture, the Leased Aircraft Guarantee,
the Equipment Notes issued thereunder and the Trust Agreement relating to the
financing of a Leased Aircraft.

"Leased Aircraft" means an Aircraft subject to a Lease.

"Leased Aircraft Guarantee" means a guarantee substantially in the form of
Exhibit A-6 of the Note Purchase Agreement.

"Leased Aircraft Indenture" means a Trust Indenture and Mortgage substantially
in the form of Exhibit A-3 to the Note Purchase Agreement.

"Leased Aircraft Participation Agreement" means a Participation Agreement
substantially in the form of Exhibit A-1 to the Note Purchase Agreement.

"Liquidity Facility" has the meaning set forth in the ninth recital to the Note
Purchase Agreement.

"Liquidity Provider" has the meaning set forth in the fourth recital to the Note
Purchase Agreement.

"Loan Trustee" means (i) in the case of the Lease Financing Agreements, the
"Mortgagee" as defined therein, and (ii) in the case of the Owner Financing
Agreements, the "Mortgagee" as defined therein.

<PAGE>

"Mandatory Document Terms" means the terms set forth on Schedule V to the Note
Purchase Agreement.

"Mandatory Economic Terms" means the terms set forth on Schedule VI to the Note
Purchase Agreement.

"Manufacturer" means The Boeing Company, a Delaware corporation, solely in its
capacity as manufacturer or seller of Aircraft.

"Material Adverse Change" means, with respect to any Person, any event,
condition or circumstance that materially and adversely affects such Person 's
business or consolidated financial condition or its ability to observe or
perform its obligations, liabilities and agreements under the Operative
Agreements.

"Non Premium Amount" means the amount equal to unused Deposits to be distributed
due to the failure of an Aircraft to be delivered from the Manufacturer prior to
the Delivery Period Termination Date due to any reason not occasioned by ATA's
fault or negligence (it being understood that failure to arrange financing shall
be considered the Company's "fault" for purposes hereof). Deposits comprising
Non Premium Amounts will not be treated as unused Deposits in determining
whether the unused Deposits exceed the Par Redemption Amount.

"Note Purchase Agreement" means the Note Purchase Agreement to which this Annex
A is attached.

"Notice of Purchase Withdrawal" with respect to each Deposit Agreement, has the
meaning set forth in Section 2.3 thereof.

"Operative Agreements" means, collectively, the Pass Through Trust Agreements,
the Escrow and Paying Agent Agreements, the Deposit Agreements, the Liquidity
Facilities, the Intercreditor Agreement, the Registration Rights Agreement, the
Delayed Funding Implementation Agreement, the Certificates and the Financing
Agreements.

"Owned Aircraft" means an Aircraft subject to an Owned Aircraft Indenture

"Owned Aircraft Guarantee" means a guarantee substantially in the form of
Exhibit C-3 to the Note Purchase Agreement.

"Owned Aircraft Indenture" means a Trust Indenture and Mortgage substantially in
the form of Exhibit C-2 to the Note Purchase Agreement.

"Owned Aircraft Participation Agreement" means a Participation Agreement
substantially in the form of Exhibit C-1 to the Note Purchase Agreement.

<PAGE>

"Owner Financing Agreements" means, collectively, the Owned Aircraft
Participation Agreement, the Owned Aircraft Indenture, the Owned Aircraft
Guarantee and the Equipment Notes issued thereunder.

"Owner Participant" means, with respect to any Leased Aircraft, the Person named
as the Owner Participant in the Participation Agreement with respect to such
Leased Aircraft.

"Owner Trust" means with respect to any Leased Aircraft, the trust created by
the "Trust Agreement" referred to in the Leased Aircraft Indenture related
thereto.

"Owner Trustee" means with respect to any Leased Aircraft, the "Owner Trustee"
party to the "Trust Agreement" referred to in the Leased Aircraft Indenture
related thereto.

"Par Redemption Amount" means $3 million.

"Participation Agreements" means, collectively, the Leased Aircraft
Participation Agreements and the Owned Aircraft Participation Agreements.

"Pass Through Trust" has the meaning set forth in the third recital to the Note
Purchase Agreement.

"Pass Through Trust Agreements" has the meaning set forth in the third recital
to the Note Purchase Agreement.

"Pass Through Trustee" has the meaning set forth in the first paragraph of the
Note Purchase Agreement.

"Paying Agent" has the meaning set forth in the first paragraph of the Note
Purchase Agreement.

"Person" means any individual, firm, partnership, joint venture, trust, trustee,
Government Entity, organization, association, corporation, limited liability
company, government agency, committee, department, authority and other body,
corporate or incorporate, whether having distinct legal status or not, or any
member of any of the same.

"Prepayment Withdrawal" with respect to each Escrow and Paying Agent Agreement,
has the meaning set forth in Section 1.02 thereof.

"Pro Rata Share" means, with respect to any Class of Certificates, the Par
Redemption Amount multiplied by a fraction, the numerator of which shall be the
amount of unused Deposits to be distributed to holders of such Class of
Certificates in connection with the Final Withdrawal and the denominator of
which shall be the amount of unused Deposits to be distributed to holders of all
Classes of Certificates in connection with the Final Withdrawal.

"Purchase Agreement Assignment" means either (i) the Purchase Agreement
Assignment in the form of Exhibit A-4-1 to the Note Purchase Agreement, in the
case of an ATA Aircraft or (ii) the

<PAGE>

Purchase Agreement Assignment in the form of Exhibit A-4-2 to the Note Purchase
Agreement, in the case of a GE Aircraft.

"Purchasers" means collectively, Nyala Funding LLC, as purchaser under the
Certificates Purchase Agreement dated as of March 26, 2002 with the Guarantor
and the Company relating to the American Trans Air 2002-1A Pass Through Trust,
and PK AirFinance US, Inc., as purchaser under the Certificates Purchase
Agreement dated as of March 26, 2002 with the Guarantor and the Company relating
to the American Trans Air 2002-1B Pass Through Trust.

"Qualified Owner Participant" means any bank, trust company, insurance company,
financial institution, limited liability company or corporation (other than,
without the Company's consent, a commercial air carrier, a commercial aircraft
operator, a freight forwarder or Affiliate of any of the foregoing), in each
case with a combined capital and surplus or net worth of at least $50,000,000.

"Rating Agency" means, at any time, a nationally recognized rating agency which
shall have been requested to rate the Certificates and which shall then be
rating the Certificates. The initial Rating Agency will be Moody's Investors
Service, Inc.

"Rating Agency Confirmation" means, with respect to any Financing Agreement that
has been modified in any material respect from the forms thereof attached to the
Note Purchase Agreement or with respect to Substitute Aircraft, a written
confirmation from the Rating Agency that the use of such Financing Agreement
with such modifications or the substituting of such Substitute Aircraft for an
Aircraft, whichever of the foregoing shall in a particular case require Rating
Agency Confirmation, would not result in (i) a reduction of the rating for any
Class of Certificates below the then current rating for such Class of
Certificates or (ii) a withdrawal or suspension of the rating of any Class of
Certificates.

"Register" means the register maintained pursuant to Sections 3.04 and 7.12 of
each Pass Through Trust Agreement.

"Registration Rights Agreement" means the Registration Rights Agreement dated as
of March 26, 2002, among the Investors (as defined therein), the Pass Through
Trustee, the Guarantor and the Company, as amended, supplemented or otherwise
modified from time to time in accordance with its terms.

"Regular Distribution Dates" shall mean February 20, May 20, August 20 and
November 20 of each year, commencing May 20, 2002.

"Remaining Weighted Average Life" means, on a given date with respect to any
Equipment Note, the number of days equal to the quotient obtained by dividing
(a) the sum of each of the products obtained by multiplying (i) the amount of
each then remaining scheduled payment of principal of such Equipment Note by
(ii) the number of days from and including such determination date to but
excluding the date on which such payment of principal is scheduled to be made,
by (b) the then outstanding principal amount of such Equipment Note.

<PAGE>

"Replacement Deposit Agreement" means a deposit agreement with a Replacement
Depositary in substantially the form of the Deposit Agreement or Delayed Deposit
Agreement being replaced or in such other form as shall permit the Rating Agency
to issue its written confirmation required by Section 4(a)(vii)(B)(I) of the
Note Purchase Agreement.

"Replacement Depositary" has the meaning set forth in Section 4(a)(vii) of the
Note Purchase Agreement.

"Scheduled Delivery Date" has the meaning set forth in Section 1(b) hereof.

"Section 1110" means 11 U.S.C. (ss.) 1110 of the Bankruptcy Code or any
successor or analogous Section of the federal bankruptcy Law in effect from time
to time.

"Series A Equipment Notes" means Equipment Notes issued under an Indenture and
designated as "Series A" thereunder.

"Series B Equipment Notes" means Equipment Notes issued under an Indenture and
designated as "Series B" thereunder.

"Series C Equipment Notes" means Equipment Notes issued under an Owned Aircraft
Indenture or Leased Aircraft Indenture and designated as "Series C" thereunder,
if any.

"Subordination Agent" has the meaning set forth in the first paragraph of the
Note Purchase Agreement.

"Substitute Aircraft" has the meaning set forth in Section 1(g) of the Note
Purchase Agreement.

"Taxes" means all license, recording, documentary, registration and other
similar fees and all taxes, levies, imposts, duties, charges, assessments or
withholdings of any nature whatsoever imposed by any Taxing Authority, together
with any penalties, additions to tax, fines or interest thereon or additions
thereto.

"Taxing Authority" means any federal, state or local government or other taxing
authority in the United States of America, any foreign government or any
political subdivision or taxing authority thereof, any international taxing
authority or any territory or possession of the United States of America or any
taxing authority thereof.

"Treasury Yield" means, as of any date of determination, with respect to any
Equipment Note (utilizing the Assumed Amortization Schedule applicable thereto),
the interest rate (expressed as a decimal and, in the case of United States
Treasury bills, converted to a bond equivalent yield) determined to be the per
annum rate equal to the semi-annual yield to maturity for United States Treasury
securities maturing on the Average Life Date (of such Equipment Note) and
trading in the public securities markets either as determined by interpolation
between the most recent weekly average yield to maturity for two series of
United States Treasury securities, trading in

<PAGE>

the public securities markets, (A) one maturing as close as possible to, but
earlier than, the Average Life Date (of such Equipment Note) and (B) the other
maturing as close as possible to, but later than, the Average Life Date (of such
Equipment Note), in each case as published in the most recent H.15(519) or, if a
weekly average yield to maturity for United States Treasury securities maturing
on the Average Life Date (of such Equipment Note) is reported on the most recent
H.15(519), such weekly average yield to maturity as published in such H.15(519).

"Triggering Event" has the meaning assigned to such term in the Intercreditor
Agreement.

"Trust Agreement" means a Trust Agreement substantially in the form of Exhibit
A-5 to the Note Purchase Agreement.

"WTC" has the meaning set forth in the first paragraph of the Note Purchase
Agreement.

<PAGE>

                                 EXHIBIT A-1 to
                             Note Purchase Agreement

                 FORM OF LEASED AIRCRAFT PARTICIPATION AGREEMENT

<PAGE>

                                EXHIBIT A-2-1 to
                             Note Purchase Agreement

                                FORM OF 467 LEASE

<PAGE>

                                EXHIBIT A-2-2 to
                             Note Purchase Agreement

                              FORM OF NON-467 LEASE

<PAGE>

                                 EXHIBIT A-3 to
                             Note Purchase Agreement

                        FORM OF LEASED AIRCRAFT INDENTURE

<PAGE>

                                EXHIBIT A-4-1 to
                             Note Purchase Agreement

              FORM OF PURCHASE AGREEMENT ASSIGNMENT (ATA Aircraft)

<PAGE>

                                EXHIBIT A-4-2 to
                             Note Purchase Agreement

               FORM OF PURCHASE AGREEMENT ASSIGNMENT (GE Aircraft)

<PAGE>

                                 EXHIBIT A-5 to
                             Note Purchase Agreement

                     FORM OF LEASED AIRCRAFT TRUST AGREEMENT

<PAGE>

                                   EXHIBIT A-6
                           to Note Purchase Agreement

                        FORM OF LEASED AIRCRAFT GUARANTEE

<PAGE>

                                  EXHIBIT B to
                             Note Purchase Agreement

                             FORM OF DELIVERY NOTICE

                         Dated as of __________ __, ____

To each of the addressees listed
         in Schedule A hereto

                  Re:  Delivery Notice in accordance with Note Purchase
                       Agreement referred to below

Ladies and Gentlemen:

         Reference is made to the Note Purchase Agreement among American Trans
Air, Inc. (the "Company"), Amtran, Inc., Wilmington Trust Company, as Pass
Through Trustee under each of the Pass Through Trust Agreements (as defined
therein) (the "Pass Through Trustee"), Wilmington Trust Company, as
Subordination Agent (the "Subordination Agent"), Wells Fargo Bank Northwest,
National Association, as Escrow Agent (the "Escrow Agent") and Wilmington Trust
Company, as Paying Agent (the "Paying Agent") (as amended, supplemented or
otherwise modified from time to time in accordance with its terms, the "Note
Purchase Agreement"). Unless otherwise defined herein, capitalized terms used
herein shall have the meanings set forth in the Note Purchase Agreement or, to
the extent not defined therein, the Intercreditor Agreement.

         Pursuant to Section 1(b) of the Note Purchase Agreement, the
undersigned hereby notifies you, in respect of the Boeing 737-800 aircraft with
manufacturer's serial number _______ (the "Aircraft"), of the following:

(1)      The Aircraft is [an ATA Aircraft] [a GE Aircraft]; the Company has
         elected to treat the Aircraft as a [Leased](1)/[Owned](2) Aircraft;
         [and the Lease is to be in the form of Exhibit [A-2-1] [A-2-2] to the
         Note Purchase Agreement, subject to changes permitted under
         Section 1(c)];

(2)      The [Scheduled Delivery Date] [Funding Date] of the Aircraft is
         __________ __, ______; and

---------------------
(1)  To be inserted in the case of a Leased Aircraft.
(2)  To be inserted in the case of an Owned Aircraft.

<PAGE>

(3)      The aggregate amount of each series of Equipment Notes to be issued,
         and purchased by the respective Pass Through Trustees, on the
         [Scheduled Delivery Date],[Funding Date] in connection with the
         financing of such Aircraft is as follows:

         (a) the Class A Trustee shall purchase Series A Equipment Notes in the
             amount of __________.

         (b) the Class B Trustee shall purchase Series B Equipment Notes in the
             amount of $__________.

         The Company hereby instructs the Class A Trustee to (i) execute a
Withdrawal Certificate in the form of Annex A hereto dated _______________, [a
date which is no later than one Business Day prior to the [Scheduled Delivery
Date][Funding Date]] and attach thereto a Notice of Purchase Withdrawal dated
such date completed as set forth on Exhibit A hereto and (ii) deliver such
Withdrawal Certificate and Notice of Purchase Withdrawal to the applicable
Escrow Agent.

         The Company hereby instructs the Class B Trustee to (i) execute a
Withdrawal Certificate in the form of Annex A hereto dated ______________ [a
date which is no later than one Business Day prior to the [Scheduled Delivery
Date] [Funding Date]] and attach thereto a Notice of Purchase Withdrawal dated
such date completed as set forth on Exhibit B hereto and (ii) deliver such
Withdrawal Certificate and Notice of Purchase Withdrawal to the applicable
Escrow Agent.

         The Company hereby instructs each Pass Through Trustee to (i) purchase
Equipment Notes of a series and in an amount set forth opposite such Pass
Through Trustee in clause (3) above with a portion of the proceeds of the
withdrawals of Deposits referred to in the applicable Notice of Purchase
Withdrawal referred to above and (ii) re-deposit with the Depositary the excess,
if any, of the amount so withdrawn over the purchase price of such Equipment
Notes.

         The Company hereby instructs each Pass Through Trustee to (a) enter
into the Participation Agreement dated as of _______________ among the Company,
as [Lessee](3)/[Owner](4), the Subordination Agent, the Pass Through Trustee,
Wilmington Trust Company, as Mortgagee [and Loan Participant, Wells Fargo Bank
Northwest, National Association, as Owner Trustee and _________, as Owner
Participant](5), (b) perform its obligations thereunder and (c) deliver such
certificates, documents and legal opinions relating to such Pass Through Trustee
as required thereby.

----------------------
(3)  To be inserted in the case of a Leased Aircraft.
(4)  To be inserted in the case of an Owned Aircraft.
(5)  To be inserted in the case of a Leased Aircraft.

<PAGE>

         [The Company hereby certifies that the Owner Participant with respect
to the Aircraft is (a) not an Affiliate of the Company and (b) based on
representation(s) of the Owner Participant, a [Qualified Owner
Participant/person whose obligations under the Owner Participant Agreements (as
defined in the Participation Agreement) are guaranteed by a Qualified Owner
Participant].](6)

Yours faithfully,

AMERICAN TRANS AIR, INC.

By:
   --------------------------------
   Name:
   Title:

------------------
(6)   To be inserted in the case of a Leased Aircraft.

<PAGE>

                                   SCHEDULE A
                     to Exhibit B to Note Purchase Agreement

Wilmington Trust Company, as
   Pass Through Trustee, Subordination
   Agent and Paying Agent
Rodney Square North
1100 North Market Street
Wilmington, Delaware  19890
Attention:  Corporate Trust Administration
Facsimile:  (302) 636-4140

Wells Fargo Bank Northwest, National Association,
   as Escrow Agent
79 South Main Street, 3rd Floor
Salt Lake City, Utah  84111
Attention:  Corporate Trust Department
Facsimile:  (801) 246-5053

Moody's Investors Service, Inc.
99 Church Street
New York, New York  10007
Attention:  Bob Jankowitz
Facsimile:  (212) 553-4600

<PAGE>

                                                                        ANNEX A
                                                     to Form of Delivery Notice

                             WITHDRAWAL CERTIFICATE
                                  (Class __)*

Wells Fargo Bank Northwest, National Association,
as Escrow Agent

Dear Sirs:

                  Reference is made to the Escrow and Paying Agent Agreement,
dated as of March 28, 2002 (as amended, supplemented or otherwise modified from
time to time in accordance with its terms, the "Agreement"). We hereby certify
to you that the conditions to the obligations of the undersigned to execute a
Participation Agreement pursuant to the Note Purchase Agreement have been
satisfied. Pursuant to Section 1.02(c) of the Agreement, please execute the
attached Notice of Withdrawal and immediately transmit by facsimile to the
Depositary, at (___) ________.

                            Very truly yours,

                            WILMINGTON TRUST COMPANY,
                               not in its individual capacity but
                               solely as Pass Through Trustee

                            By:
                               -----------------------------------
                                 Name:
                                 Title:

Dated: _________, ____

-------------------------
*  Insert letter of appropriate class of Certificates.

<PAGE>

                                                                      EXHIBIT A
                                                     to Form of Delivery Notice

                          NOTICE OF PURCHASE WITHDRAWAL

------------------
[Address]
Attention:
Telecopier:

Ladies and Gentlemen:

                  Reference is made to the Deposit Agreement relating to the
Class A Certificates. In accordance with Section 2.3(a) of such Deposit
Agreement, the undersigned hereby requests the withdrawal of the entire amount
of the Deposit, $_______, Account No. ____________.

                  The undersigned hereby directs the Depositary to pay the
proceeds of the Deposit to [________________, Account No. _____, Reference:
_________] on _________ __, ____, upon the telephonic request of a
representative of the Pass Through Trustee.

                  Capitalized terms used but not defined herein shall have the
meanings ascribed to such terms in the Note Purchase Agreement referred to in
the Delivery Notice to which this Notice is attached.

                           WELLS FARGO BANK NORTHWEST,
                           NATIONAL ASSOCIATION,

                                 as Escrow Agent

                             By
                                ------------------------------
                                  Name:
                                  Title:

Dated: __________, ____

<PAGE>

                                                                      EXHIBIT B
                                                     to Form of Delivery Notice

                          NOTICE OF PURCHASE WITHDRAWAL

------------------
[Address]
Attention:
Telecopier:

Ladies and Gentlemen:

                  Reference is made to the Deposit Agreement relating to the
Class B Certificates. In accordance with Section 2.3(a) of such Deposit
Agreement, the undersigned hereby requests the withdrawal of the entire amount
of the Deposit, $_______, Account No. ____________.

                  The undersigned hereby directs the Depositary to pay the
proceeds of the Deposit to [________________, Account No. _____, Reference:
_________] on _________ __, ____, upon the telephonic request of a
representative of the Pass Through Trustee.

                  Capitalized terms used but not defined herein shall have the
meanings ascribed to such terms in the Note Purchase Agreement referred to in
the Delivery Notice to which this Notice is attached.

                           WELLS FARGO BANK NORTHWEST,

                           NATIONAL ASSOCIATION,

                               as Escrow Agent

                             By
                                -------------------------------
                                  Name:
                                  Title:

Dated: _________, ____

<PAGE>

                                 EXHIBIT C-1 to
                             Note Purchase Agreement

                 FORM OF OWNED AIRCRAFT PARTICIPATION AGREEMENT

<PAGE>

                                 EXHIBIT C-2 to
                             Note Purchase Agreement

                        FORM OF OWNED AIRCRAFT INDENTURE

<PAGE>

                                 EXHIBIT C-3 to
                             Note Purchase Agreement

                        FORM OF OWNED AIRCRAFT GUARANTEE

<PAGE>

                                  EXHIBIT D to
                             Note Purchase Agreement

                       ADDITIONAL SUBORDINATION PROVISION
                          FOR SERIES C EQUIPMENT NOTES

Subordination.

(a)     As between the Note Holders, this Trust Indenture shall be a
        subordination agreement for purposes of Section 510 of the United States
        Bankruptcy Code, as amended, from time to time.

(b)     If any Note Holder receives any payment in respect of any obligations
        owing hereunder, which is subsequently invalidated, declared
        preferential, set aside and/or required to be repaid to a trustee,
        receiver or other party, then, to the extent of such payment, such
        obligations intended to be satisfied shall be revived and continue in
        full force and effect as if such payment had not been received.

(c)     Each of the Note Holders may take any of the following actions without
        impairing its rights under this Trust Indenture:

        (i)   obtain a Lien on any property to secure any amounts owing to it
              hereunder,

        (ii)  obtain the primary or secondary obligation of any other obligor
              with respect to any amounts owing to it hereunder,

        (iii) renew, extend, alter or exchange any amounts owing to it
              hereunder, or release or compromise any obligation of any obligor
              with respect thereto,

        (iv)  refrain from exercising any right or remedy, or delay in
              exercising such right or remedy, which it may have, or

        (v)   take any other action which might discharge a subordinated party
              or a surety under applicable law;

         provided, however, that the taking of any such actions by any of the
         Note Holders shall not prejudice the rights or adversely affect the
         obligations of any other party under this Trust Indenture.

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