Document:

Exhibit 4.1

          INDENTURE, dated as of July 24, 1997, among AMTRAN, INC., an Indiana
corporation, as issuer (the "Company"), American Trans Air, Inc., Ambassadair
Travel Club, Inc., ATA Vacations, Inc., Amber Travel, Inc., American Trans Air
Training Corporation, American Trans Air Execujet, Inc. and Amber Air Freight
Corporation (each, an Indiana corporation), as guarantors (together, the
"Guarantors"), and First Security Bank, N.A., a national banking association, as
trustee (the "Trustee").

                             RECITALS OF THE COMPANY

          The Company has duly authorized the execution and delivery of this
Indenture to provide for the issuance of up to $100,000,000 aggregate principal
amount of the Company's 10 1/2% Senior Notes due 2004 (the "Notes"), issuable as
provided in this Indenture. Pursuant to the terms of the Placement Agreement
dated July 17, 1997 (the "Placement Agreement"), among the Company, the
Guarantors and Morgan Stanley & Co. Incorporated and Salomon Brothers Inc, as
the placement agents (the "Placement Agents"), the Company has agreed to issue
and sell, and the Placement Agents have agreed to purchase, the Notes. All
things necessary to make this Indenture a valid agreement of the Company and
each Guarantor, in accordance with its terms, have been done, and the Company
and each Guarantor have done all things necessary to make the Notes, when duly
executed and issued by the Company and authenticated and delivered by the
Trustee hereunder, the valid obligations of the Company as hereinafter provided.

          This Indenture is subject to, and shall be governed by, the provisions
of the Trust Indenture Act of 1939, as amended, that are required to be a part
of and to govern indentures qualified under the Trust Indenture Act of 1939, as
amended.

                      AND THIS INDENTURE FURTHER WITNESSETH

          For and in consideration of the premises and the purchase of the Notes
by the Holders thereof, it is mutually covenanted and agreed, for the equal and
proportionate benefit of all Holders, as follows:

                                   ARTICLE ONE
                   DEFINITIONS AND INCORPORATION BY REFERENCE

          SECTION 1.01. Definitions.

          "Acquired Indebtedness" means Indebtedness of a Person existing at the
time such Person becomes a Restricted Subsidiary or assumed in connection with
an Asset Acquisition by a Restricted Subsidiary and not Incurred in connection
with, or in anticipation of, such Person becoming a Restricted Subsidiary or
such Asset Acquisition; provided that Indebtedness of such Person which is
redeemed, defeased, retired or otherwise repaid at the time of or immediately
upon consummation of the transactions by which such Person becomes a Restricted
Subsidiary or such Asset Acquisition shall not be Acquired Indebtedness.

          "Adjusted Consolidated Net Income" means, for any period, the
aggregate net income (or loss) of the Company and its Restricted Subsidiaries
for such period determined in conformity with GAAP; provided that the following
items shall be excluded in computing Adjusted Consolidated Net Income (without
duplication): (i) the net income of any Person that is not a Restricted
Subsidiary, except to the extent of the amount of dividends or other
distributions actually

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          paid to the Company or any of its Restricted Subsidiaries by such
Person during such period; (ii) solely for the purposes of calculating the
amount of Restricted Payments that may be made pursuant to clause (C) of the
first paragraph of Section 4.04 (and in such case, except to the extent
includable pursuant to clause (i) above), the net income (or loss) of any Person
accrued prior to the date it becomes a Restricted Subsidiary or is merged into
or consolidated with the Company or any of its Restricted Subsidiaries or all or
substantially all of the property and assets of such Person are acquired by the
Company or any of its Restricted Subsidiaries; (iii) the net income of any
Restricted Subsidiary which is not a Guarantor to the extent that the
declaration or payment of dividends or similar distributions by such Restricted
Subsidiary of such net income is not at the time permitted by the operation of
the terms of its charter or any agreement, instrument, judgment, decree, order,
statute, rule or governmental regulation applicable to such Restricted
Subsidiary; (iv) any gains or losses (on an after-tax basis) attributable to
Asset Sales; (v) except for purposes of calculating the amount of Restricted
Payments that may be made pursuant to clause (C) of the first paragraph of
Section 4.04, any amount paid or accrued as dividends on Preferred Stock of the
Company or any Restricted Subsidiary owned by Persons other than the Company and
any of its Restricted Subsidiaries; and (vi) all extraordinary gains and
extraordinary losses.

          "Adjusted Consolidated Net Tangible Assets" means the total amount of
assets of the Company and its Restricted Subsidiaries (less applicable
depreciation, amortization and other valuation reserves), except to the extent
resulting from write-ups of capital assets (excluding write-ups in connection
with accounting for acquisitions in conformity with GAAP), after deducting
therefrom (i) all current liabilities of the Company and its Restricted
Subsidiaries (excluding intercompany items) and (ii) all goodwill, trade names,
trademarks, patents, unamortized debt discount and expense and other like
intangibles, all as set forth on the most recent quarterly or annual
consolidated balance sheet of the Company and its Restricted Subsidiaries,
prepared in conformity with GAAP and filed with the Commission or provided to
the Trustee pursuant to Section 4.17.

          "Affiliate" means, as applied to any Person, any other Person
directly or indirectly controlling, controlled by, or under direct or
indirect common control with, such Person. For purposes of this definition,
"control" (including, with correlative meanings, the terms "controlling,"
"controlled by" and "under common control with"), as applied to any Person,
means the possession, directly or indirectly, of the power to direct or
cause the direction of the management and policies of such Person, whether
through the ownership of voting securities, by contract or otherwise.

          "Agent" means any Registrar, Paying Agent, authenticating agent or
co-Registrar. "Agent Members" has the meaning provided in Section 2.07(a).

          "Asset Acquisition" means (i) an investment by the Company or any of
its Restricted Subsidiaries in any other Person pursuant to which such Person
shall become a Restricted Subsidiary or shall be merged into or consolidated
with the Company or any of its Restricted Subsidiaries; provided that such
Person's primary business is related, ancillary or complementary to the
businesses of the Company and its Restricted Subsidiaries on the date of such
investment or (ii) an acquisition by the Company or any of its Restricted
Subsidiaries of the property and assets of any Person other than the Company or
any of its Restricted Subsidiaries that constitute substantially all of a
division or line of business of such Person; provided that the property and
assets acquired are related, ancillary or complementary to the businesses of the
Company and its Restricted Subsidiaries on the date of such acquisition.

          "Asset Disposition" means the sale or other disposition by the
Company or any of its Restricted Subsidiaries (other than to the Company or
another Restricted Subsidiary) of (i) all or substantially all of the
Capital Stock of any Restricted Subsidiary of the Company or (ii) all or

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substantially all of the assets that constitute a division or line of business
of the Company or any of its Restricted Subsidiaries.

          "Asset Sale" means any sale, transfer or other disposition (including
by way of merger, consolidation or sale-leaseback transaction) in one
transaction or a series of related transactions by the Company or any of its
Restricted Subsidiaries to any Person other than the Company or any of its
Restricted Subsidiaries of (i) all or any of the Capital Stock of any Restricted
Subsidiary (other than directors' qualifying shares), (ii) all or substantially
all of the property and assets of an operating unit or business of the Company
or any of its Restricted Subsidiaries or (iii) any other property and assets of
the Company or any of its Restricted Subsidiaries outside the ordinary course of
business of the Company or such Restricted Subsidiary and, in each case, that is
not governed by Article Five; provided that "Asset Sale" shall not include (a)
sales or other dispositions of inventory, receivables and other current assets,
(b) sales or other dispositions of assets for consideration at least equal to
the fair market value of the assets sold or disposed of, to the extent that the
consideration received would satisfy clause (B) of Section 4.11 or (c) sales or
other dispositions of assets in a single transaction or series of related
transactions having a fair market value, as determined in good faith by the
Board of Directors, of $2 million or less.

          "ATA" means American Trans Air, Inc.

          "Average Life" means, at any date of determination with respect to any
debt security, the quotient obtained by dividing (i) the sum of the products of
(a) the number of years from such date of determination to the dates of each
successive scheduled principal payment of such debt security and (b) the amount
of such principal payment by (ii) the sum of all such principal payments.

          "Board of Directors" means the Board of Directors of the Company or
any committee of such Board of Directors duly authorized to act under this
Indenture.

          "Board Resolution" means a copy of a resolution, certified by the
Secretary of the Company to have been duly adopted by the Board of Directors and
to be in full force and effect on the date of such certification, and delivered
to the Trustee.

          "Business Day" means any day except a Saturday, Sunday or other day on
which commercial banks in The City of New York, or in the city of the Corporate
Trust Office of the Trustee, are authorized by law to close.

          "Capital Stock" means, with respect to any Person, any and all shares,
interests, participations or other equivalents (however designated, whether
oting or non-voting) in equity of such Person, whether outstanding on the
Closing Date or issued thereafter, including, without limitation, all Common
Stock and Preferred Stock.

          "Capitalized Lease" means, as applied to any Person, any lease of any
property (whether real, personal or mixed) of which the discounted present value
of the rental obligations of such Person as lessee, in conformity with GAAP, is
required to be capitalized on the balance sheet of such Person.

          "Capitalized Lease Obligations" means the discounted present value of
the rental obligations under a Capitalized Lease.

          "Change of Control" means such time as (i) (x) a "person" or "group"
(within the meaning of Sections 13(d) and 14(d)(2) of the Exchange Act) becomes
the ultimate "beneficial owner" (as defined in Rule 13d-3 under the Exchange
Act) of more than 35% of the total voting

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power of the Voting Stock of the Company on a fully diluted basis and such
ownership represents a greater percentage of the total voting power of the
Voting Stock of the Company, on a fully diluted basis, than is held by the
Existing Stockholders and their Affiliates on such date and (y) immediately
following the occurrence of the events specified in subsection (x), there shall
have occurred any downgrading, or notice shall have been given of any intended
or potential downgrading, in the rating accorded any of the Company's securities
or (ii) individuals who on the Closing Date constitute the Board of Directors
(together with any new directors whose election by the Board of Directors or
whose nomination by the Board of Directors for election by the Company's
stockholders was approved by a vote of at least two-thirds of the members of the
Board of Directors then in office who either were members of the Board of
Directors on the Closing Date or whose election or nomination for election was
previously so approved) cease for any reason to constitute a majority of the
members of the Board of Directors then in office.

          "Closing Date" means the date on which the Notes are originally issued
under this Indenture.

          "Commission" means the Securities and Exchange Commission, as from
time to time constituted, created under the Exchange Act or, if at any time
after the execution of this instrument such Commission is not existing and
performing the duties now assigned to it under the TIA, then the body performing
such duties at such time.

          "Common Stock" means, with respect to any Person, any and all shares,
interests, participations or other equivalents (however designated, whether
voting or non-voting) of such Person's equity, other than Preferred Stock of
such Person, whether now outstanding or issued after the Closing Date, including
without limitation, all series and classes of such common stock.

          "Company" means the party named as such in this Indenture until a
successor replaces it pursuant to Article Five of this Indenture and,
thereafter, means the successor.

          "Company Order" means a written request or order signed in the name of
the Company (i) by its Chairman, a Vice Chairman, its President or a Vice
President and (ii) by its Treasurer, an Assistant Treasurer, its Secretary or an
Assistant Secretary and delivered to the Trustee; provided, however, that such
written request or order may be signed by any two of the Persons listed in
clause (i) above in lieu of being signed by one of such Persons listed in such
clause (i) and one of the officers listed in clause (ii) above.

          "Consolidated EBITDA" means, for any period, Adjusted Consolidated Net
Income for such period plus, to the extent such amount was deducted in
calculating such Adjusted Consolidated Net Income, (i) Consolidated Interest
Expense, (ii) income taxes (other than income taxes (either positive or
negative) attributable to extraordinary and non-recurring gains or losses
arising out of sales of assets), (iii) depreciation expense, (iv) amortization
expense and (v) all other non-cash items reducing Adjusted Consolidated Net
Income (other than items that will require cash payments and for which an
accrual or reserve is, or is required by GAAP to be, made), less all non-cash
items increasing Adjusted Consolidated Net Income, all as determined on a
consolidated basis for the Company and its Restricted Subsidiaries in conformity
with GAAP; provided that, if any Restricted Subsidiary is not a Wholly Owned
Restricted Subsidiary, Consolidated EBITDA shall be reduced (to the extent not
otherwise reduced in the calculation of Adjusted Consolidated Net Income in
accordance with GAAP) by an amount equal to (A) the amount of the Adjusted
Consolidated Net Income attributable to such Restricted Subsidiary multiplied by
(B) the quotient of (1) the number of shares of outstanding Common Stock of such
Restricted Subsidiary not owned on the last day of such period by the Company or
any of its Restricted Subsidiaries divided by (2)

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the total number of shares of outstanding Common Stock of such Restricted
Subsidiary on the last day of such period.

          "Consolidated Interest Expense" means, for any period, the aggregate
amount of interest in respect of Indebtedness (including, without limitation but
without duplication, amortization of original issue discount on any Indebtedness
and the interest portion of any deferred purchase price payment obligation,
calculated in accordance with the effective interest method of accounting; all
commissions, discounts and other fees and charges owed with respect to letters
of credit and bankers' acceptance financing; the net costs associated with
Interest Rate Agreements; and Indebtedness that is Guaranteed or secured by the
Company or any of its Restricted Subsidiaries) and the interest component of
rentals in respect of Capitalized Lease Obligations paid, accrued or scheduled
to be paid or to be accrued by the Company and its Restricted Subsidiaries
during such period; excluding, however, (i) any amount of such interest of any
Restricted Subsidiary if the net income of such Restricted Subsidiary is
excluded in the calculation of Adjusted Consolidated Net Income pursuant to
clause (iii) of the definition thereof (but only in the same proportion as the
net income of such Restricted Subsidiary is excluded from the calculation of
Adjusted Consolidated Net Income pursuant to clause (iii) of the definition
thereof), (ii) any premiums, fees and expenses (and any amortization thereof)
payable in connection with the offering of the Notes or the Credit Agreement,
all as determined on a consolidated basis (without taking into account
Unrestricted Subsidiaries) in conformity with GAAP, and (iii) any interest or
other financing costs associated with loans to students of the Company's
training academy, unless such costs are paid by the Company or any Restricted
Subsidiary.

          "Consolidated Net Worth" means, at any date of determination,
stockholders' equity as set forth on the most recently available quarterly or
annual consolidated balance sheet of the Company and its Restricted Subsidiaries
(which shall be as of a date not more than 90 days prior to the date of such
computation, and which shall not take into account Unrestricted Subsidiaries),
less any amounts attributable to Disqualified Stock or any equity security
convertible into or exchangeable for Indebtedness, the cost of treasury stock
and the principal amount of any promissory notes receivable from the sale of the
Capital Stock of the Company or any of its Restricted Subsidiaries, each item to
be determined in conformity with GAAP (excluding the effects of foreign currency
exchange adjustments under Financial Accounting Standards Board Statement of
Financial Accounting Standards No. 52).

          "Corporate Trust Office" means the office of the Trustee at which the
corporate trust business of the Trustee shall, at any particular time, be
principally administered, which office is, at the date of this Indenture,
located at 79 South Main Street, Salt Lake City, Utah, 84111, Attention:
Corporate Trust Services.

          "Credit Agreement" means the credit agreement among ATA, NBD Bank,
N.A., as agent, the lenders named therein, the Company and the other Guarantors,
as guarantors, together with all other loan or credit agreements entered into
from time to time with one or more banks or other institutional lenders and all
instruments and documents executed or delivered pursuant thereto, in each case
as such agreements, instruments or documents may be amended (including any
amendment and restatement thereof), supplemented, replaced or otherwise modified
from time to time in one or more successive transactions (including any such
transaction that changes the amount available, replaces the relevant agreement
or changes one or more lenders).

          "Currency Agreement" means any foreign exchange contract, currency
swap agreement or other similar agreement or arrangement.

          "Default" means any event that is, or after notice or passage of time
or both would be, an Event of Default.

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          "Depositary" means The Depository Trust Company, its nominees, and
their respective successors, until a successor Depositary shall have become such
pursuant to the applicable provisions of this Indenture, and thereafter
"Depositary" shall mean or include each Person who is then a Depositary
hereunder.

          "Disqualified Stock" means any class or series of Capital Stock of any
Person that by its terms or otherwise is (i) required to be redeemed prior to
the Stated Maturity of the Notes, (ii) redeemable at the option of the holder of
such class or series of Capital Stock at any time prior to the Stated Maturity
of the Notes or (iii) convertible into or exchangeable for Capital Stock
referred to in clause (i) or (ii) above or Indebtedness having a scheduled
maturity prior to the Stated Maturity of the Notes; provided that any Capital
Stock that would not constitute Disqualified Stock but for provisions thereof
giving holders thereof the right to require such Person to repurchase or redeem
such Capital Stock upon the occurrence of an "asset sale" or "change of control"
occurring prior to the Stated Maturity of the Notes shall not constitute
Disqualified Stock if the "asset sale" or "change of control" provisions
applicable to such Capital Stock are no more favorable to the holders of such
Capital Stock than the provisions contained in Section 4.11 and Section 4.12 and
such Capital Stock specifically provides that such Person will not repurchase or
redeem any such stock pursuant to such provision prior to the Company's
repurchase of such Notes as are required to be repurchased pursuant to Section
4.11 and Section 4.12.

          "Event of Default" has the meaning provided in Section 6.01.

          "Excess Proceeds" has the meaning provided in Section 4.11.

          "Exchange Act" means the Securities Exchange Act of 1934, as amended.

          "Exchange Notes" means any securities of the Company containing terms
identical to the Notes (except that such Exchange Notes shall be registered
under the Securities Act) that are issued and exchanged for the Notes pursuant
to the Registration Rights Agreement and this Indenture.

          "Existing Stockholders" means J. George Mikelsons, his spouse, his
issue, any trust for any of the foregoing and any Affiliate of any of the
foregoing.

          "fair market value" means the price that would be paid in an
arm's-length transaction between an informed and willing seller under no
compulsion to sell and an informed and willing buyer under no compulsion to buy,
as determined in good faith by the Board of Directors, whose determination shall
be conclusive if evidenced by a Board Resolution.

          "GAAP" means generally accepted accounting principles in the United
States of America as in effect as of the Closing Date, including, without
limitation, those set forth in the opinions and pronouncements of the Accounting
Principles Board of the American Institute of Certified Public Accountants and
statements and pronouncements of the Financial Accounting Standards Board or in
such other statements by such other entity as approved by a significant segment
of the accounting profession. All ratios and computations contained or referred
to herein (i) shall be computed in conformity with GAAP applied on a consistent
basis, except that calculations made for purposes of determining compliance with
the terms of this Indenture shall be made without giving effect to (A) the
amortization of any expenses incurred in connection with the offering of the
Notes and (B) except as otherwise provided, the amortization of any amounts
required or permitted by Accounting Principles Board Opinion Nos. 16 and 17 and
(ii) shall, insofar as they involve the treatment for financial reporting
purposes of amounts incurred with engine overhauls, reflect the accounting
policy of the Company as in effect as of the Closing Date.

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          "Global Notes" has the meaning provided in Section 2.01.

          "Guarantee" means, without duplication, any obligation, contingent or
otherwise, of any Person directly or indirectly guaranteeing any Indebtedness of
any other Person and, without limiting the generality of the foregoing, any
obligation, direct or indirect, contingent or otherwise, of such Person (i) to
purchase or pay (or advance or supply funds for the purchase or payment of) such
Indebtedness of such other Person (whether arising by virtue of partnership
arrangements, or by agreements to keep-well, to purchase assets, goods,
securities or services (unless such purchase arrangements are on arm's-length
terms and are entered into in the ordinary course of business), to take-or-pay,
or to maintain financial statement conditions or otherwise) or (ii) entered into
for purposes of assuring in any other manner the obligee of such Indebtedness of
the payment thereof or to protect such obligee against loss in respect thereof
(in whole or in part); provided that the term "Guarantee" shall not include
endorsements for collection or deposit in the ordinary course of business. The
term "Guarantee" used as a verb has a corresponding meaning.

          "Guaranteed Indebtedness" has the meaning provided in Section 4.07.

          "Guarantors" means American Trans Air, Inc., Ambassadair Travel Club,
Inc., ATA Vacations, Inc., Amber Travel, Inc., American Trans Air Training
Corporation, American Trans Air Execujet, Inc. and Amber Air Freight Corporation
(each, an Indiana corporation), until a successor replaces any Guarantor
pursuant to Article Five of this Indenture and thereafter means the successor of
such Guarantor.

          "Holder" or "Noteholder" means the registered holder of any Note.

          "Incur" means, with respect to any Indebtedness, to incur, create,
issue, assume, Guarantee or otherwise become liable for or with respect to, or
become responsible for, the payment of, contingently or otherwise, such
Indebtedness, including an "Incurrence" of Acquired Indebtedness; provided that
neither the accrual of interest nor the accretion of original issue discount
shall be considered an Incurrence of Indebtedness.

          "Indebtedness" means, with respect to any Person at any date of
determination (without duplication), (i) all indebtedness of such Person for
borrowed money, (ii) all obligations of such Person evidenced by bonds,
debentures, notes or other similar instruments, (iii) all obligations of such
Person in respect of letters of credit or other similar instruments (including
reimbursement obligations with respect thereto, but excluding obligations with
respect to letters of credit (including trade letters of credit) securing
obligations (other than obligations described in (i) or (ii) above or (v), (vi)
or (vii) below) entered into in the ordinary course of business of such Person
to the extent such letters of credit are not drawn upon or, if drawn upon, to
the extent such drawing is reimbursed no later than the third Business Day
following receipt by such Person of a demand for reimbursement), (iv) all
obligations of such Person to pay the deferred and unpaid purchase price of
property or services, which purchase price is due more than six months after the
date of placing such property in service or taking delivery and title thereto or
the completion of such services, except Trade Payables, (v) all Capitalized
Lease Obligations, (vi) all Indebtedness of other Persons secured by a Lien on
any asset of such Person, whether or not such Indebtedness is assumed by such
Person; provided that the amount of such Indebtedness shall be the lesser of (A)
the fair market value of such asset at such date of determination and (B) the
amount of such Indebtedness, (vii) all Indebtedness of other Persons Guaranteed
by such Person to the extent such Indebtedness is Guaranteed by such Person and
(viii) to the extent not otherwise included in this definition, obligations
under Currency Agreements and Interest Rate Agreements. The amount of
Indebtedness of any Person at any date shall be the outstanding balance at such
date of all unconditional obligations as described above and, with respect to
contingent obligations, the maximum liability upon the occurrence of the
contingency

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giving rise to the obligation, provided (A) that the amount outstanding at any
time of any Indebtedness issued with original issue discount is the face amount
of such Indebtedness less the remaining unamortized portion of the original
issue discount of such Indebtedness at the time of its issuance as determined in
conformity with GAAP, (B) that money borrowed and set aside at the time of the
Incurrence of any Indebtedness in order to prefund the payment of the interest
on such Indebtedness shall not be deemed to be "Indebtedness" and (C) that
Indebtedness shall not include any liability for federal, state, local or other
taxes.

          "Indenture" means this Indenture as originally executed or as it may
be amended or supplemented from time to time by one or more indentures
supplemental to this Indenture entered into pursuant to the applicable
provisions of this Indenture.

          "Institutional Accredited Investor" means an institution that is an
"accredited investor" as that term is defined in Rule 501(a)(1), (2), (3) or (7)
under the Securities Act.

          "Interest Coverage Ratio" means, on any Transaction Date, the ratio of
(i) the aggregate amount of Consolidated EBITDA for the then most recent four
fiscal quarters prior to such Transaction Date for which reports have been filed
with the Commission (the "Four Quarter Period") to (ii) the aggregate
Consolidated Interest Expense during such Four Quarter Period. In making the
foregoing calculation, (A) pro forma effect shall be given to any Indebtedness
Incurred or repaid during the period (the "Reference Period") commencing on the
first day of the Four Quarter Period and ending on the Transaction Date (other
than Indebtedness Incurred or repaid under a revolving credit or similar
arrangement to the extent of the commitment thereunder (or under any predecessor
revolving credit or similar arrangement) in effect on the last day of such Four
Quarter Period unless any portion of such Indebtedness is projected, in the
reasonable judgment of the senior management of the Company, to remain
outstanding for a period in excess of 12 months from the date of the Incurrence
thereof), in each case as if such Indebtedness had been Incurred or repaid on
the first day of such Reference Period; (B) Consolidated Interest Expense
attributable to interest on any Indebtedness (whether existing or being
Incurred) computed on a pro forma basis and bearing a floating interest rate
shall be computed as if the rate in effect on the Transaction Date (taking into
account any Interest Rate Agreement applicable to such Indebtedness if such
Interest Rate Agreement has a remaining term in excess of 12 months or, if
shorter, at least equal to the remaining term of such Indebtedness) had been the
applicable rate for the entire period; (C) pro forma effect shall be given to
Asset Dispositions and Asset Acquisitions (including giving pro forma effect to
the application of proceeds of any Asset Disposition) that occur during such
Reference Period as if they had occurred and such proceeds had been applied on
the first day of such Reference Period; and (D) pro forma effect shall be given
to asset dispositions and asset acquisitions (including giving pro forma effect
to the application of proceeds of any asset disposition) that have been made by
any Person that has become a Restricted Subsidiary or has been merged with or
into the Company or any Restricted Subsidiary during such Reference Period and
that would have constituted Asset Dispositions or Asset Acquisitions had such
transactions occurred when such Person was a Restricted Subsidiary as if such
asset dispositions or asset acquisitions were Asset Dispositions or Asset
Acquisitions that occurred on the first day of such Reference Period; provided
that to the extent that clause (C) or (D) of this sentence requires that pro
forma effect be given to an Asset Acquisition or Asset Disposition, such pro
forma calculation shall be based upon the four full fiscal quarters immediately
preceding the Transaction Date of the Person, or division or line of business of
the Person, that is acquired or disposed for which financial information is
available.

          "Interest Payment Date" means each semiannual interest payment date on
February 1 and August 1 of each year, commencing February 1, 1998.

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          "Interest Rate Agreement" means any interest rate protection
agreement, interest rate future agreement, interest rate option agreement,
interest rate swap agreement, interest rate cap agreement, interest rate collar
agreement, interest rate hedge agreement, option or future contract or other
similar agreement or arrangement.

          "Investment" in any Person means any direct or indirect advance, loan
or other extension of credit (including, without limitation, by way of Guarantee
or similar arrangement; but excluding advances to customers in the ordinary
course of business that are, in conformity with GAAP, recorded as accounts
receivable on the balance sheet of the Company or its Restricted Subsidiaries)
or capital contribution to (by means of any transfer of cash or other property
to others or any payment for property or services for the account or use of
others), or any purchase or acquisition of Capital Stock, bonds, notes,
debentures or other similar instruments issued by, such Person and shall include
(i) the designation of a Restricted Subsidiary as an Unrestricted Subsidiary and
(ii) the fair market value of the Capital Stock (or any other Investment), held
by the Company or any of its Restricted Subsidiaries, of (or in) any Person that
has ceased to be a Restricted Subsidiary, including without limitation, by
reason of any transaction permitted by clause (iii) of Section 4.06; provided
that the fair market value of the Investment remaining in any Person that has
ceased to be a Restricted Subsidiary shall not exceed the aggregate amount of
Investments previously made in such Person valued at the time such Investments
were made less the net reduction of such Investments. For purposes of the
definition of "Unrestricted Subsidiary" and Section 4.04, (i) "Investment" shall
include the fair market value of the assets (net of liabilities (other than
liabilities to the Company or any of its Restricted Subsidiaries)) of any
Restricted Subsidiary at the time that such Restricted Subsidiary is designated
an Unrestricted Subsidiary, (ii) the fair market value of the assets (net of
liabilities (other than liabilities to the Company or any of its Restricted
Subsidiaries)) of any Unrestricted Subsidiary at the time that such Unrestricted
Subsidiary is designated a Restricted Subsidiary shall be considered a reduction
in outstanding Investments and (iii) any property transferred to or from an
Unrestricted Subsidiary shall be valued at its fair market value at the time of
such transfer.

          "Lien" means any mortgage, pledge, security interest, encumbrance,
lien or charge of any kind (including, without limitation, any conditional sale
or other title retention agreement or lease in the nature thereof or any
agreement to give any security interest).

          "Moody's" means Moody's Investors Service, Inc. and its successors.

          "Net Cash Proceeds" means, (a) with respect to any Asset Sale, the
proceeds of such Asset Sale in the form of cash or cash equivalents, including
payments in respect of deferred payment obligations (to the extent corresponding
to the principal, but not interest, component thereof) when received in the form
of cash or cash equivalents (except to the extent such obligations are financed
or sold with recourse to the Company or any Restricted Subsidiary) and proceeds
from the conversion of other property received when converted to cash or cash
equivalents, net of (i) brokerage commissions and other fees and expenses
(including fees and expenses of counsel and investment bankers) related to such
Asset Sale, (ii) provisions for all taxes (whether or not such taxes will
actually be paid or are payable) as a result of such Asset Sale without regard
to the consolidated results of operations of the Company and its Restricted
Subsidiaries, taken as a whole, (iii) payments made to repay Indebtedness or any
other obligation outstanding at the time of such Asset Sale that either (A) is
secured by a Lien on the property or assets sold or (B) is required to be paid
as a result of such sale and (iv) appropriate amounts to be provided by the
Company or any Restricted Subsidiary as a reserve against any liabilities
associated with such Asset Sale, including, without limitation, pension and
other post-employment benefit liabilities, liabilities related to environmental
matters and liabilities under any indemnification obligations associated with
such Asset Sale, all as determined in conformity with GAAP and (b) with respect
to any issuance or sale of Capital Stock,

<PAGE>

the proceeds of such issuance or sale in the form of cash or cash equivalents,
including payments in respect of deferred payment obligations (to the extent
corresponding to the principal, but not interest, component thereof) when
received in the form of cash or cash equivalents (except to the extent such
obligations are financed or sold with recourse to the Company or any Restricted
Subsidiary) and proceeds from the conversion of other property received when
converted to cash or cash equivalents, net of attorney's fees, accountants'
fees, underwriters' or placement agents' fees, discounts or commissions and
brokerage, consultant and other fees incurred in connection with such issuance
or sale and net of taxes paid or payable as a result thereof.

          "Non-U.S. Person" means a person who is not a "U.S. person" (as
defined in Regulation S).

          "Note Guarantee" means any Guarantee of the Notes by a Guarantor as
set forth in Article Ten.

          "Note Register" has the meaning provided in Section 2.04.

          "Notes" means any of the securities, as defined in the first paragraph
of the recitals hereof, that are authenticated and delivered under this
Indenture. For all purposes of this Indenture, the term "Notes" shall include
the Notes initially issued on the Closing Date, any Exchange Notes to be issued
and exchanged for any Notes pursuant to the Registration Rights Agreement and
this Indenture and any other Notes issued after the Closing Date under this
Indenture. For purposes of this Indenture, all Notes shall vote together as one
series of Notes under this Indenture.

          "Offer to Purchase" means an offer to purchase Notes by the Company
from the Holders commenced by mailing a notice to the Trustee and each Holder
stating: (i) the covenant pursuant to which the offer is being made and that all
Notes validly tendered will be accepted for payment on a pro rata basis; (ii)
the purchase price and the date of purchase (which shall be a Business Day no
earlier than 30 days nor later than 60 days from the date such notice is mailed)
(the "Payment Date"); (iii) that any Note not tendered will continue to accrue
interest pursuant to its terms; (iv) that, unless the Company defaults in the
payment of the purchase price, any Note accepted for payment pursuant to the
Offer to Purchase shall cease to accrue interest on and after the Payment Date;
(v) that Holders electing to have a Note purchased pursuant to the Offer to
Purchase will be required to surrender the Note, together with the form entitled
"Option of the Holder to Elect Purchase" on the reverse side of the Note
completed, to the Paying Agent at the address specified in the notice prior to
the close of business on the Business Day immediately preceding the Payment
Date; (vi) that Holders will be entitled to withdraw their election if the
Paying Agent receives, not later than the close of business on the third
Business Day immediately preceding the Payment Date, a telegram, facsimile
transmission or letter setting forth the name of such Holder, the principal
amount of Notes delivered for purchase and a statement that such Holder is
withdrawing his election to have such Notes purchased; (vii) that Holders whose
Notes are being purchased only in part will be issued new Notes equal in
principal amount to the unpurchased portion of the Notes surrendered; provided
that each Note purchased and each new Note issued shall be in a principal amount
of $1,000 or integral multiples thereof; and (viii) if more than 98% of the
outstanding principal amount of the Notes is tendered pursuant to an Offer to
Purchase, the Company shall have the right to redeem the balance of the Notes at
the purchase price specified in such Offer to Purchase, plus (without
duplication) accrued and unpaid interest, if any, to the Redemption Date on the
principal amount of the Notes to be redeemed. On the Payment Date, the Company
shall (i) accept for payment on a pro rata basis Notes or portions thereof
tendered pursuant to an Offer to Purchase; (ii) deposit with the Paying Agent
money sufficient to pay the purchase price of all Notes or portions thereof so
accepted; and (iii) deliver, or cause to be delivered, to the Trustee all Notes
or portions thereof so accepted together with an Officers' Certificate
specifying the Notes or portions thereof

<PAGE>

accepted for payment by the Company. The Paying Agent shall promptly mail to the
Holders of Notes so accepted payment in an amount equal to the purchase price,
and the Trustee shall promptly authenticate and mail to such Holders a new Note
equal in principal amount to any unpurchased portion of the Note surrendered;
provided that each Note purchased and each new Note issued shall be in a
principal amount of $1,000 or integral multiples thereof. The Company will
publicly announce the results of an Offer to Purchase as soon as practicable
after the Payment Date. The Trustee shall act as the Paying Agent for an Offer
to Purchase. The Company will comply with Rule 14e-1 under the Exchange Act and
any other securities laws and regulations thereunder to the extent such laws and
regulations are applicable, in the event that the Company is required to
repurchase Notes pursuant to an Offer to Purchase.

          "Officer" means with respect to the Company or any Guarantor, the
Chairman of the Board, the President, any Vice President, the Chief Financial
Officer, the Treasurer or any Assistant Treasurer, or the Secretary or any
Assistant Secretary.

          "Officers' Certificate" means a certificate signed by two Officers.
Each Officers' Certificate (other than certificates provided pursuant to TIA
Section 314(a)(4)) shall include the statements provided for in TIA Section
314(e).

          "Offshore Global Note" has the meaning provided the Section 2.01.

          "Offshore Physical Note" has the meaning provided the Section 2.01.

          "Opinion of Counsel" means a written opinion signed by legal counsel
who may be an employee of or counsel to the Company or any Guarantor. Each such
Opinion of Counsel shall include the statements provided for in TIA Section
314(e). Opinions of Counsel required to be delivered may have qualifications
customary for opinions of the type required.

          "Paying Agent" has the meaning provided in Section 2.04, except that,
for the purposes of Article Eight, the Paying Agent shall not be the Company or
a Subsidiary of the Company or an Affiliate of any of them. The term "Paying
Agent" includes any additional Paying Agent.

          "Permitted Investment" means (i) an Investment in the Company or a
Restricted Subsidiary or a Person which will, upon the making of such
Investment, become a Restricted Subsidiary or be merged or consolidated with or
into or transfer or convey all or substantially all its assets to, the Company
or a Restricted Subsidiary; provided that such person's primary business is
related, ancillary or complementary to the businesses of the Company and its
Restricted Subsidiaries on the date of such Investment; (ii) Temporary Cash
Investments; (iii) payroll, travel and similar advances to cover matters that
are expected at the time of such advances ultimately to be treated as expenses
in accordance with GAAP; (iv) stock, obligations or securities received in
settlement or satisfaction of judgments or claims; (v) loans or advances to
employees in the ordinary course of business; and (vi) the non-cash portion of
the consideration received for any Asset Sale.

          "Permitted Liens" means (i) Liens for taxes, assessments, governmental
charges or claims that are being contested in good faith by appropriate legal
proceedings promptly instituted and diligently conducted and for which a reserve
or other appropriate provision, if any, as shall be required in conformity with
GAAP shall have been made; (ii) statutory and common law Liens of landlords and
carriers, warehousemen, mechanics, suppliers, materialmen, repairmen or other
similar Liens arising in the ordinary course of business and with respect to
amounts not yet delinquent or being contested in good faith by appropriate legal
proceedings promptly instituted and diligently conducted and for which a reserve
or other appropriate provision, if any, as shall be required in

<PAGE>

          conformity with GAAP shall have been made; (iii) Liens incurred or
deposits made in the ordinary course of business in connection with workers'
compensation, unemployment insurance and other types of social security; (iv)
Liens incurred or deposits made to secure the performance of tenders, bids,
leases, statutory or regulatory obligations, bankers' acceptances, surety and
appeal bonds, government contracts, performance and return-of-money bonds and
other obligations of a similar nature incurred in the ordinary course of
business (exclusive of obligations for the payment of borrowed money); (v)
easements, rights-of-way, municipal and zoning ordinances and similar charges,
encumbrances, title defects or other irregularities that do not materially
interfere with the ordinary course of business of the Company or any of its
Restricted Subsidiaries; (vi) Liens (including extensions and renewals thereof)
upon real or personal property acquired after the Closing Date; provided that
(a) each such Lien is created solely for the purpose of securing Indebtedness
Incurred to finance the costs (including transaction costs and the costs of
improvement or construction) of the item of property or assets subject thereto
and such Lien is created prior to, at the time of or within twelve months after,
the later of the acquisition, the completion of construction or the commencement
of full operation of such property or assets (b) the principal amount of the
Indebtedness secured by such Lien does not exceed 100% of such costs and (c) any
such Lien shall not extend to or cover any property or assets other than such
item of property or assets and any improvements on such item; (vii) Liens upon
aircraft, engines and buyer-furnished equipment attached thereto or incorporated
therein other than as permitted by the foregoing clause (vi); provided that,
after giving effect thereto and the Indebtedness secured thereby, the book value
of assets of the Company not subject to any Lien (other than Liens described in
clauses (i) through (v), (xiii) and (xvi) of the definition of "Permitted
Liens") shall be not less than $125 million; (viii) leases or subleases granted
to others that do not materially interfere with the ordinary course of business
of the Company and its Restricted Subsidiaries, taken as a whole; (ix) Liens
encumbering property or assets under construction arising from progress or
partial payments by a customer of the Company or its Restricted Subsidiaries
relating to such property or assets; (x) any interest or title of a lessor in
the property subject to any Capitalized Lease or operating lease; (xi) Liens
arising from filing Uniform Commercial Code financing statements regarding
leases; (xii) Liens on property of, or on shares of Capital Stock or
Indebtedness of, any Person existing at the time such Person becomes, or becomes
a part of, any Restricted Subsidiary; provided that such Liens do not extend to
or cover any property or assets of the Company or any Restricted Subsidiary
other than the property or assets acquired; (xiii) Liens with respect to the
assets of a Restricted Subsidiary granted by such Restricted Subsidiary to the
Company or a Wholly Owned Restricted Subsidiary to secure Indebtedness owing to
the Company or such other Restricted Subsidiary; (xiv) Liens arising from the
rendering of a final judgment or order against the Company or any Restricted
Subsidiary that does not give rise to an Event of Default; (xv) Liens securing
reimbursement obligations with respect to letters of credit that encumber
documents and other property relating to such letters of credit and the products
and proceeds thereof; (xvi) Liens in favor of customs and revenue authorities
arising as a matter of law to secure payment of customs duties in connection
with the importation of goods; (xvii) Liens encumbering customary initial
deposits and margin deposits, and other Liens that are within the general
parameters customary in the industry and incurred in the ordinary course of
business, in each case, securing Indebtedness under Interest Rate Agreements and
Currency Agreements and forward contracts, options, future contracts, futures
options or similar agreements or arrangements designed solely to protect the
Company or any of its Restricted Subsidiaries from fluctuations in interest
rates, currencies or the price of commodities; (xviii) Liens arising out of
conditional sale, title retention, consignment or similar arrangements for the
sale of goods entered into by the Company or any of its Restricted Subsidiaries
in the ordinary course of business in accordance with the past practices of the
Company and its Restricted Subsidiaries prior to the Closing Date; and (xix)
Liens on or sales of receivables.

<PAGE>

          "Person" means an individual, a corporation, a partnership, a limited
liability company, an association, a trust or any other entity or organization,
including a government or political subdivision or an agency or instrumentality
thereof.

          "Physical Notes" has the meaning provided in Section 2.01.

          "principal" of a debt security, including the Notes, means the
principal amount due on the Stated Maturity as shown on such debt security.

          "Private Placement Legend" means the legend initially set forth on the
Notes in the form set forth in Section 2.02.

          "QIB" means a "qualified institutional buyer" as defined in Rule 144A.

          "Redemption Date", when used with respect to any Note to be redeemed,
means the date fixed for such redemption by or pursuant to this Indenture.

          "Redemption Price", when used with respect to any Note to be redeemed,
means the price at which such Note is to be redeemed pursuant to this Indenture.

          "Registrar" has the meaning provided in Section 2.04.

          "Registration Rights Agreement" means the Registration Rights
Agreement, dated as of July 24, 1997, among the Company, the Guarantors and
Morgan Stanley & Co. Incorporated and Salomon Brothers Inc.

          "Registration Statement" means the Registration Statement as defined
and described in the Registration Rights Agreement.

          "Regular Record Date" for the interest payable on any Interest Payment
Date means the January 15 or July 15 (whether or not a Business Day), as the
case may be, next preceding such Interest Payment Date.

          "Regulation S" means Regulation S under the Securities Act.

          "Responsible Officer", when used with respect to the Trustee, means
the chairman or any vice chairman of the board of directors, the chairman or any
vice chairman of the executive committee of the board of directors, the chairman
of the trust committee, the president, any vice president, any assistant vice
president, the secretary, any assistant secretary, the treasurer, any assistant
treasurer, the cashier, any assistant cashier, any trust officer or assistant
trust officer, the controller or any assistant controller or any other officer
of the Trustee customarily performing functions similar to those performed by
any of the above designated officers (including any officer within the Corporate
Trust and Agency Group (or any successor group) of the Trustee) and also means,
with respect to a particular corporate trust matter, any other officer to whom
such matter is referred because of his or her knowledge of and familiarity with
the particular subject.

          "Restricted Payments" has the meaning provided in Section 4.04.

          "Restricted Subsidiary" means any Subsidiary of the Company other than
an Unrestricted Subsidiary.

          "Rule 144A" means Rule 144A under the Securities Act.

<PAGE>

          "S&P" means Standard & Poor's Ratings Service and its successors.

          "Securities Act" means the Securities Act of 1933, as amended.

          "Shelf Registration Statement" has the meaning provided in the
Registration Rights Agreement.

          "Significant Subsidiary" means, at any date of determination,
any Restricted Subsidiary that, together with its Subsidiaries, (i) for the most
recent fiscal year of the Company, accounted for more than 10% of the
consolidated revenues of the Company and its Restricted Subsidiaries or (ii) as
of the end of such fiscal year, was the owner of more than 10% of the
consolidated assets of the Company and its Restricted Subsidiaries, all as set
forth on the most recently available consolidated financial statements of the
Company for such fiscal year.

          "Specified Date" means any Redemption Date, any Payment Date for an
Offer to Purchase pursuant to Section 4.11 or Section 4.12 or any date on which
the Notes are due and payable after an Event of Default.

          "Stated Maturity" means, (i) with respect to any debt security, the
date specified in such debt security as the fixed date on which the final
installment of principal of such debt security is due and payable and (ii) with
respect to any scheduled installment of principal of or interest on any debt
security, the date specified in such debt security as the fixed date on which
such installment is due and payable.

          "Subsidiary" means, with respect to any Person, any corporation,
association or other business entity of which more than 50% of the voting power
of the outstanding Voting Stock is owned, directly or indirectly, by such Person
and one or more other Subsidiaries of such Person.

          "Subsidiary Guarantee" has the meaning provided in Section 4.07.

          "Temporary Cash Investment" means any of the following: (i) direct
obligations of the United States of America or any agency thereof or obligations
fully and unconditionally guaranteed by the United States of America or any
agency thereof, (ii) time deposit accounts, certificates of deposit and money
market deposits maturing within 180 days of the date of acquisition thereof
issued by a bank or trust company which is organized under the laws of the
United States of America, any state thereof or any foreign country recognized by
the United States of America, and which bank or trust company has capital,
surplus and undivided profits aggregating in excess of $50 million (or the
foreign currency equivalent thereof) and has outstanding debt which is rated "A"
(or such similar equivalent rating) or higher by at least one nationally
recognized statistical rating organization (as defined in Rule 436 under the
Securities Act) or any money-market fund sponsored by a registered broker dealer
or mutual fund distributor, (iii) repurchase obligations with a term of not more
than 30 days for underlying securities of the types described in clause (i)
above entered into with a bank meeting the qualifications described in clause
(ii) above, (iv) commercial paper, maturing not more than 90 days after the date
of acquisition, issued by a corporation (other than an Affiliate of the Company)
organized and in existence under the laws of the United States of America, any
state thereof or any foreign country recognized by the United States of America
with a rating at the time as of which any investment therein is made of "P-1"
(or higher) according to Moody's or "A-1" (or higher) according to S&P, and (v)
securities with maturities of six months or less from the date of acquisition
issued or fully and unconditionally guaranteed by any state, commonwealth or
territory of the United States of America, or by any political subdivision or
taxing authority thereof, and rated at least "A" by S&P or Moody's.

<PAGE>

          "TIA" or "Trust Indenture Act" means the Trust Indenture Act of 1939,
as amended (15 U.S. Code ss.ss. 77aaa-77bbb), as in effect on the date this
Indenture was executed, except as provided in Section 9.06.

          "Trade Payables" means, with respect to any Person, any accounts
payable or any other indebtedness or monetary obligation to trade creditors
created, assumed or Guaranteed by such Person or any of its Subsidiaries arising
in the ordinary course of business in connection with the acquisition of goods
or services.

          "Transaction Date" means, with respect to the Incurrence of any
Indebtedness by the Company or any of its Restricted Subsidiaries, the date such
Indebtedness is to be Incurred and, with respect to any Restricted Payment, the
date such Restricted Payment is to be made.

          "Trustee" means the party named as such in the first paragraph of this
Indenture until a successor replaces it in accordance with the provisions of
Article Seven of this Indenture and thereafter means such successor.

          "United States Bankruptcy Code" means the Bankruptcy Reform Act of
1978, as amended and as codified in Title 11 of the United States Code, as
amended from time to time hereafter, or any successor federal bankruptcy law.

          "Unrestricted Subsidiary" means (i) any Subsidiary of the Company that
at the time of determination shall be designated an Unrestricted Subsidiary by
the Board of Directors in the manner provided below; and (ii) any Subsidiary of
an Unrestricted Subsidiary. The Board of Directors may designate any Restricted
Subsidiary (including any newly acquired or newly formed Subsidiary of the
Company) to be an Unrestricted Subsidiary unless such Subsidiary owns any
Capital Stock of, or owns or holds any Lien on any property of, the Company or
any Restricted Subsidiary; provided that (A) any Guarantee by the Company or any
Restricted Subsidiary of any Indebtedness of the Subsidiary being so designated
shall be deemed an "Incurrence" of such Indebtedness and an "Investment" by the
Company or such Restricted Subsidiary (or both, if applicable) at the time of
such designation; (B) either (I) the Subsidiary to be so designated has total
assets of $1,000 or less or (II) if such Subsidiary has assets greater than
$1,000, such designation would be permitted under Section 4.04 and (C) if
applicable, the Incurrence of Indebtedness and the Investment referred to in
clause (A) of this proviso would be permitted under Section 4.03 and Section
4.04. The Board of Directors may designate any Unrestricted Subsidiary to be a
Restricted Subsidiary; provided that (i) no Default or Event of Default shall
have occurred and be continuing at the time of or after giving effect to such
designation and (ii) all Liens and Indebtedness of such Unrestricted Subsidiary
outstanding immediately after such designation would, if Incurred at such time,
have been permitted to be Incurred (and shall be deemed to have been Incurred)
for all purposes of the Indenture. Any such designation by the Board of
Directors shall be evidenced to the Trustee by promptly filing with the Trustee
a copy of the Board Resolution giving effect to such designation and an
Officers' Certificate certifying that such designation complied with the
foregoing provisions.

          "U.S. Global Notes" has the meaning provided in Section 2.01.

          "U.S. Government Obligations" means securities that are (i) direct
obligations of the United States of America for the payment of which its full
faith and credit is pledged or (ii) obligations of a Person controlled or
supervised by and acting as an agency or instrumentality of the United States of
America the payment of which is unconditionally guaranteed as a full faith and
credit obligation by the United States of America, which, in either case, are
not callable or redeemable at the option of the issuer thereof at any time prior
to the Stated Maturity of the Notes,

<PAGE>

and shall also include a depository receipt issued by a bank or trust company as
custodian with respect to any such U.S. Government Obligation or a specific
payment of interest on or principal of any such U.S. Government Obligation held
by such custodian for the account of the holder of a depository receipt;
provided that (except as required by law) such custodian is not authorized to
make any deduction from the amount payable to the holder of such depository
receipt from any amount received by the custodian in respect of the U.S.
Government Obligation or the specific payment of interest on or principal of the
U.S. Government Obligation evidenced by such depository receipt.

          "U.S. Physical Notes" has the meaning provided in Section 2.01.

          "Voting Stock" means with respect to any Person, Capital Stock of any
class or kind ordinarily having the power to vote for the election of directors,
managers or other voting members of the governing body of such Person.

          "Wholly Owned" means, with respect to any Subsidiary of any Person,
the ownership of all of the outstanding Capital Stock of such Subsidiary (other
than any director's qualifying shares or Investments by foreign nationals
mandated by applicable law) by such Person or one or more Wholly Owned
Subsidiaries of such Person.

          SECTION 1.02. Incorporation by Reference of Trust Indenture Act.
Whenever this Indenture refers to a provision of the TIA, the provision is
incorporated by reference in and made a part of this Indenture. The following
TIA terms used in this Indenture have the following meanings:

          "indenture securities" means the Notes;

          "indenture security holder" means a Holder or a Noteholder;

          "indenture to be qualified" means this Indenture;

          "indenture trustee" or "institutional trustee" means the Trustee; and

          "obligor" on the indenture securities means the Company, the
Guarantors or any other obligor on the Notes.

          All other TIA terms used in this Indenture that are defined by
the TIA, defined by TIA reference to another statute or defined by a rule of the
Commission and not otherwise defined herein have the meanings assigned to them
therein.

          SECTION 1.03. Rules of Construction. Unless the context otherwise
requires:

          (i) a term has the meaning assigned to it;

          (ii) an accounting term not otherwise defined has the meaning assigned
     to it in accordance with GAAP;

          (iii) "or" is not exclusive;

          (iv) words in the singular include the plural, and words in the plural
     include the singular;

<PAGE>

          (v) provisions apply to successive events and transactions;

          (vi) "herein," "hereof" and other words of similar import refer to
     this Indenture as a whole and not to any particular Article, Section or
     other subdivision;

          (vii) all ratios and computations based on GAAP contained in this
     Indenture shall be computed in accordance with the definition of GAAP set
     forth in Section 1.01; and

          (viii) all references to Sections or Articles refer to Sections or
     Articles of this Indenture unless otherwise indicated.

                                   ARTICLE TWO
                                    THE NOTES

          SECTION 2.01. Form and Dating. The Notes and the Trustee's certificate
of authentication shall be substantially in the form annexed hereto as Exhibit
A. The Notes may have notations, legends or endorsements required by law, stock
exchange agreements to which the Company is subject or usage. The Company shall
approve the form of the Notes and any notation, legend or endorsement on the
Notes. Each Note shall be dated the date of its authentication.

          The terms and provisions contained in the form of the Notes annexed
hereto as Exhibit A shall constitute, and are hereby expressly made, a part of
this Indenture. To the extent applicable, the Company, the Guarantors and the
Trustee, by their execution and delivery of this Indenture, expressly agree to
such terms and provisions and to be bound thereby.

          Notes offered and sold in reliance on Rule 144A shall be issued
initially in the form of one or more permanent global Notes in registered form,
substantially in the form set forth in Exhibit A (the "U.S. Global Notes"),
deposited with the Trustee, as custodian for the Depositary, duly executed by
the Company and authenticated by the Trustee as hereinafter provided. The
aggregate principal amount of the U.S. Global Notes may from time to time be
increased or decreased by adjustments made on the records of the Trustee, as
custodian for the Depositary or its nominee, as hereinafter provided.

          Notes offered and sold in offshore transactions in reliance on
Regulation S shall be issued initially in the form of one or more permanent
global Notes in registered form substantially in the form set forth in Exhibit A
(the "Offshore Global Notes") deposited with the Trustee, as custodian for the
Depositary, duly executed by the Company and authenticated by the Trustee as
hereinafter provided. The aggregate principal amount of the Offshore Global
Notes may from time to time be increased or decreased by adjustments made on the
records of the Trustee, as custodian for the Depositary or its nominee, as
hereinafter provided.

          Notes offered and sold in reliance on Regulation D under the
Securities Act shall be issued in the form of permanent certificated Notes in
registered form in substantially the form set forth in Exhibit A (the "U.S.
Physical Notes"). Notes issued pursuant to Section 2.07 in exchange for
interests in the Offshore Global Notes shall be in the form of permanent
certificated Notes in registered form substantially in the form set forth in
Exhibit A (the "Offshore Physical Notes").

          The Offshore Physical Notes and U.S. Physical Notes are sometimes
collectively herein referred to as the "Physical Notes". The U.S. Global Note
and the Offshore Global Note are sometimes referred to herein as the "Global
Notes."

<PAGE>

          The definitive Notes shall be typed, printed, lithographed or engraved
or produced by any combination of these methods or may be produced in any other
manner permitted by the rules of any securities exchange on which the Notes may
be listed, all as determined by the Officers executing such Notes, as evidenced
by their execution of such Notes.

          SECTION 2.02. Restrictive Legends. Unless and until a Note is
exchanged for an Exchange Note in connection with an effective Registration
Statement pursuant to the Registration Rights Agreement, (i) each U.S. Global
Note and each U.S. Physical Note shall bear the legend, set forth below on the
face thereof and (ii) each Offshore Physical Note and each Offshore Global Note
shall bear the legend set forth below on the face thereof until at least the
41st day after the Closing Date and receipt by the Company and the Trustee of a
certificate substantially in the form of Exhibit B hereto.

     THIS NOTE HAS NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS
     AMENDED (THE "SECURITIES ACT"), AND ACCORDINGLY, MAY NOT BE OFFERED OR SOLD
     WITHIN THE UNITED STATES OR TO, OR FOR THE ACCOUNT OR BENEFIT OF, U.S.
     PERSONS EXCEPT AS SET FORTH IN THE FOLLOWING SENTENCE. BY ITS ACQUISITION
     HEREOF, THE HOLDER (1) REPRESENTS THAT (A) IT IS A "QUALIFIED INSTITUTIONAL
     BUYER" (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) OR (B) IT IS AN
     INSTITUTIONAL "ACCREDITED INVESTOR" (AS DEFINED IN RULE 501(a)(1), (2), (3)
     OR (7) OF REGULATION D UNDER THE SECURITIES ACT) (AN "INSTITUTIONAL
     ACCREDITED INVESTOR") OR (C) IT IS NOT A U.S. PERSON AND IS ACQUIRING THIS
     NOTE IN AN OFFSHORE TRANSACTION IN COMPLIANCE WITH REGULATION S UNDER THE
     SECURITIES ACT, (2) AGREES THAT IT WILL NOT, WITHIN TWO YEARS AFTER THE
     ORIGINAL ISSUANCE OF THE NOTES, RESELL OR OTHERWISE TRANSFER THIS NOTE
     EXCEPT (A) TO THE COMPANY OR ANY SUBSIDIARY THEREOF, (B) TO A QUALIFIED
     INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES ACT,
     (C) INSIDE THE UNITED STATES TO AN INSTITUTIONAL ACCREDITED INVESTOR THAT,
     PRIOR TO SUCH TRANSFER, FURNISHES TO THE TRUSTEE A SIGNED LETTER CONTAINING
     CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO THE RESTRICTIONS ON
     TRANSFER OF THIS NOTE (THE FORM OF WHICH LETTER CAN BE OBTAINED FROM THE
     TRUSTEE) AND IF SUCH TRANSFER IS IN RESPECT OF AN AGGREGATE PRINCIPAL
     AMOUNT OF NOTES AT THE TIME OF TRANSFER OF LESS THAN $100,000, AN OPINION
     OF COUNSEL ACCEPTABLE TO THE COMPANY THAT SUCH TRANSFER IS IN COMPLIANCE
     WITH THE SECURITIES ACT, (D) OUTSIDE THE UNITED STATES IN AN OFFSHORE
     TRANSACTION IN COMPLIANCE WITH RULE 904 UNDER THE SECURITIES ACT, (E)
     PURSUANT TO THE EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER THE
     SECURITIES ACT (IF AVAILABLE) OR (F) PURSUANT TO AN EFFECTIVE REGISTRATION
     STATEMENT UNDER THE SECURITIES ACT AND (3) AGREES THAT IT WILL DELIVER TO
     EACH PERSON TO WHOM THIS NOTE IS TRANSFERRED A NOTICE SUBSTANTIALLY TO THE
     EFFECT OF THIS LEGEND. IN CONNECTION WITH ANY TRANSFER OF THIS NOTE WITHIN
     TWO YEARS AFTER THE ORIGINAL ISSUANCE OF THE NOTES, THE HOLDER MUST CHECK
     THE APPROPRIATE BOX SET FORTH ON THE REVERSE HEREOF RELATING TO THE MANNER
     OF SUCH TRANSFER AND SUBMIT THIS NOTE TO THE TRUSTEE. IF THE PROPOSED
     TRANSFEREE IS AN INSTITUTIONAL ACCREDITED INVESTOR, THE HOLDER MUST, PRIOR
     TO SUCH TRANSFER, FURNISH TO THE TRUSTEE AND THE COMPANY SUCH
     CERTIFICATIONS, LEGAL OPINIONS OR OTHER

<PAGE>

     INFORMATION AS EITHER OF THEM MAY REASONABLY REQUIRE TO CONFIRM THAT SUCH
     TRANSFER IS BEING MADE PURSUANT TO AN EXEMPTION FROM, OR IN A TRANSACTION
     NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT. AS
     USED HEREIN, THE TERMS "OFFSHORE TRANSACTION," "UNITED STATES" AND "U.S.
     PERSON" HAVE THE MEANINGS GIVEN TO THEM BY REGULATION S UNDER THE
     SECURITIES ACT. THE INDENTURE CONTAINS A PROVISION REQUIRING THE TRUSTEE TO
     REFUSE TO REGISTER ANY TRANSFER OF THIS NOTE IN VIOLATION OF THE FOREGOING
     RESTRICTIONS.

          Each Global Note, whether or not an Exchange Note, shall also bear the
following legend on the face thereof:

     UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE
     DEPOSITORY TRUST COMPANY TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF
     TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN
     THE NAME OF CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN
     AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY OR SUCH OTHER
     REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY OR SUCH OTHER NAME AS IS
     REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY
     (AND ANY PAYMENT HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS
     REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY),
     ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO
     ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS
     AN INTEREST HEREIN.

     TRANSFERS OF THIS GLOBAL NOTE SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT
     NOT IN PART, TO NOMINEES OF CEDE & CO. OR TO A SUCCESSOR THEREOF OR SUCH
     SUCCESSOR'S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL NOTE SHALL BE
     LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN
     SECTION 2.08 OF THE INDENTURE.

          SECTION 2.03. Execution, Authentication and Denominations. Subject to
Article Four, the aggregate principal amount of Notes which may be authenticated
and delivered under this Indenture is unlimited. The Notes shall be executed by
two Officers of the Company, by facsimile or manual signature, in the name and
on behalf of the Company.

          If an Officer whose signature is on a Note no longer holds that office
at the time the Trustee or authenticating agent authenticates the Note, the Note
shall be valid nevertheless.

          A Note shall not be valid until the Trustee or authenticating agent
manually signs the certificate of authentication on the Note. The signature
shall be conclusive evidence that the Note has been authenticated under this
Indenture.

          At any time and from time to time after the execution of this
Indenture, the Trustee or an authenticating agent shall upon receipt of a
Company Order authenticate for original issue Notes in the aggregate principal
amount specified in such Company Order; provided that the Trustee shall be
entitled to receive an Officers' Certificate and an Opinion of Counsel of the
Company that it may reasonably request in connection with such authentication of
Notes. Such Company Order

<PAGE>

shall specify the amount of Notes to be authenticated, the date on which the
original issue of Notes is to be authenticated and the aggregate principal
amount of Notes then authorized and in case of an issuance of Notes pursuant to
Section 2.15, shall certify that such issuance is in compliance with Article
Four.

          The Trustee may appoint an authenticating agent to authenticate Notes.
If the appointment of such authenticating agent is not at the discretion and for
the convenience of the Trustee, then such authenticating agent shall be
compensated by the Company. An authenticating agent may authenticate Notes
whenever the Trustee may do so. Each reference in this Indenture to
authentication by the Trustee includes authentication by such authenticating
agent. An authenticating agent has the same rights as an Agent to deal with the
Company or an Affiliate of the Company.

          The Notes shall be issuable only in registered form without coupons
and only in denominations of $1,000 in principal amount and any integral
multiple thereof.

          SECTION 2.04. Registrar and Paying Agent. The Company shall maintain
an office or agency where Notes may be presented for registration of transfer or
for exchange (the "Registrar"), an office or agency where Notes may be presented
for payment (the "Paying Agent") and an office or agency where notices and
demands to or upon the Company in respect of the Notes and this Indenture may be
served, which shall be in the Borough of Manhattan and the City of New York. The
Company shall cause the Registrar to keep a register of the Notes and of their
transfer and exchange (the "Note Register"). The Note Register shall be in
written form or any other form capable of being converted into written form
within a reasonable time. The Company may have one or more co-Registrars and one
or more additional Paying Agents.

          The Company shall enter into an appropriate agency agreement with any
Agent not a party to this Indenture, which shall incorporate the terms of the
TIA. The agreement shall implement the provisions of this Indenture that relate
to such Agent. The Company shall give prompt written notice to the Trustee of
the name and address of any such Agent and any change in the address of such
Agent. If the Company fails to maintain a Registrar, Paying Agent and/or agent
for service of notices and demands, the Trustee shall act as such Registrar,
Paying Agent and/or agent for service of notices and demands. The Company may
remove any Agent upon written notice to such Agent and the Trustee; provided
that no such removal shall become effective until (i) the acceptance of an
appointment by a successor Agent to such Agent as evidenced by an appropriate
agency agreement entered into by the Company and such successor Agent and
delivered to the Trustee or (ii) notification to the Trustee that the Trustee
shall serve as such Agent until the appointment of a successor Agent in
accordance with clause (i) of this proviso. The Company, any Subsidiary of the
Company, or any Affiliate of any of them may act as Paying Agent, Registrar or
co-Registrar, and/or agent for service of notice and demands.

          The Company initially appoints the Trustee as Registrar, Paying Agent,
authenticating agent and agent for service of notice and demands. If, at any
time, the Trustee is not the Registrar, the Company shall furnish, or cause to
be furnished, to the Trustee at least seven Business Days before each Interest
Payment Date and at such other times as the Trustee may reasonably request, the
names and addresses of the Holders as they appear in the Note Register. At the
option of the Company, payment of interest may be made by check mailed to the
address of the Holders as such address appears in the Note Register.

          SECTION 2.05. Paying Agent to Hold Money in Trust. Not later than each
due date of the principal, premium, if any, and interest on any Notes, the
Company shall deposit with the Paying Agent money in immediately available funds
sufficient to pay such principal, premium, if

<PAGE>

any, and interest so becoming due. The Company shall require each Paying Agent
other than the Trustee to agree in writing that such Paying Agent shall hold in
trust for the benefit of the Holders or the Trustee all money held by the Paying
Agent for the payment of principal of, premium, if any, and interest on the
Notes (whether such money has been paid to it by the Company or any other
obligor on the Notes), and such Paying Agent shall promptly notify the Trustee
of any default by the Company (or any other obligor on the Notes) in making any
such payment. The Company at any time may require a Paying Agent to pay all
money held by it to the Trustee and account for any funds disbursed, and the
Trustee may at any time during the continuance of any payment default, upon
written request to a Paying Agent, require such Paying Agent to pay all money
held by it to the Trustee and to account for any funds disbursed. Upon doing so,
the Paying Agent shall have no further liability for the money so paid over to
the Trustee. If the Company or any Subsidiary of the Company or any Affiliate of
any of them acts as Paying Agent, it will, on or before each due date of any
principal of, premium, if any, or interest on the Notes, segregate and hold in a
separate trust fund for the benefit of the Holders a sum of money sufficient to
pay such principal, premium, if any, or interest so becoming due until such sum
of money shall be paid to such Holders or otherwise disposed of as provided in
this Indenture, and will promptly notify the Trustee of its action or failure to
act.

          SECTION 2.06. Transfer and Exchange. The Notes are issuable only in
registered form. A Holder may transfer a Note by written application to the
Registrar stating the name of the proposed transferee and otherwise complying
with the terms of this Indenture. No such transfer shall be effected until, and
such transferee shall succeed to the rights of a Holder only upon, final
acceptance and registration of the transfer by the Registrar in the Note
Register. Prior to the registration of any transfer by a Holder as provided
herein, the Company, the Guarantors, the Trustee, and any agent of the Company,
the Guarantors or the Trustee shall treat the person in whose name the Note is
registered as the owner thereof for all purposes whether or not the Note shall
be overdue, and neither the Company, the Trustee, nor any such agent shall be
affected by notice to the contrary. Furthermore, any Holder of a Global Note
shall, by acceptance of such Global Note, agree that transfers of beneficial
interests in such Global Note may be effected only through a book entry system
maintained by the Registrar for such Global Note (or its agent) and that
ownership of a beneficial interest in the Note shall be required to be reflected
in a book entry. When Notes are presented to the Registrar or a co-Registrar
with a request to register the transfer or to exchange them for an equal
principal amount of Notes of other authorized denominations (including an
exchange of Notes for Exchange Notes), the Registrar shall register the transfer
or make the exchange as requested if its requirements for such transactions are
met; provided, that no exchanges of Notes for Exchange Notes shall occur until a
Registration Statement shall have been declared effective by the Commission
(confirmed in an Officers' Certificate delivered to the Trustee) and that any
Notes that are exchanged for Exchange Notes shall be cancelled by the Trustee.
To permit registrations of transfers and exchanges, the Company shall execute
and the Trustee shall authenticate Notes at the Registrar's request. No service
charge shall be made for any registration of transfer or exchange or redemption
of the Notes, but the Company may require payment of a sum sufficient to cover
any transfer tax or similar governmental charge payable in connection therewith
(other than any such transfer taxes or other similar governmental charge payable
upon exchanges pursuant to Section 2.11, 3.08 or 9.04).

          The Registrar shall not be required (i) to issue, register the
transfer of or exchange any Note during a period beginning at the opening of
business 15 days before the day of the mailing of a notice of redemption of
Notes selected for redemption under Section 3.03 and ending at the close of
business on the day of such mailing, or (ii) to register the transfer of or
exchange any Note so selected for redemption in whole or in part, except the
unredeemed portion of any Note being redeemed in part.

<PAGE>

          SECTION 2.07. Book-Entry Provisions for Global Notes. (a) The U.S.
Global Notes and Offshore Global Notes initially shall (i) be registered in the
name of the Depositary for such Global Notes or the nominee of such Depositary,
(ii) be delivered to the Trustee as custodian for such Depositary and (iii) bear
legends as set forth in Section 2.02.

          Members of, or participants in, the Depositary (the "Agent Members")
shall have no rights under this Indenture with respect to any Global Note held
on their behalf by the Depositary, or the Trustee as its custodian, or under the
Global Note, and the Depositary may be treated by the Company, the Guarantors,
the Trustee and any agent of the Company, the Guarantors or the Trustee as the
absolute owner of such Global Note for all purposes whatsoever. Notwithstanding
the foregoing, nothing herein shall prevent the Company, the Guarantors, the
Trustee or any agent of the Company, the Guarantors or the Trustee, from giving
effect to any written certification, proxy or other authorization furnished by
the Depositary or impair, as between the Depositary and its Agent Members, the
operation of customary practices governing the exercise of the rights of a
Holder of any Note.

          (b) Transfers of a Global Note shall be limited to transfers of such
Global Note in whole, but not in part, to the Depositary, its successors or
their respective nominees. Interests of beneficial owners in a Global Note may
be transferred in accordance with the rules and procedures of the Depositary and
the provisions of Section 2.08. In addition, U.S. Physical Notes and Offshore
Physical Notes shall be transferred to all beneficial owners in exchange for
their beneficial interests in the U.S. Global Notes or the Offshore Global
Notes, respectively, if (i) the Depositary notifies the Company that it is
unwilling or unable to continue as Depositary for the U.S. Global Notes or the
Offshore Global Notes, as the case may be, and a successor depositary is not
appointed by the Company within 90 days of such notice or (ii) an Event of
Default has occurred and is continuing and the Registrar has received a request
to the foregoing effect from the Depositary.

          (c) Any beneficial interest in one of the Global Notes that is
transferred to a person who takes delivery in the form of an interest in the
other Global Note will, upon transfer, cease to be an interest in such Global
Note and become an interest in the other Global Note and, accordingly, will
thereafter be subject to all transfer restrictions, if any, and other procedures
applicable to beneficial interests in such other Global Note for as long as it
remains such an interest.

          (d) In connection with any transfer of a portion of the beneficial
interests in a U.S. Global Note or Offshore Global Note to beneficial owners
pursuant to paragraph (b) of this Section, the Registrar shall reflect on its
books and records the date and a decrease in the principal amount of the U.S.
Global Notes or Offshore Global Notes in an amount equal to the principal amount
of the beneficial interest in such Global Notes to be transferred, and the
Company shall execute, and the Trustee shall authenticate and deliver, one or
more U.S. Physical Notes or Offshore Physical Notes, as the case may be, of like
tenor and amount.

          (e) In connection with the transfer of the entire U.S. Global Note or
Offshore Global Note to beneficial owners pursuant to paragraph (b) of this
Section, the U.S. Global Note or Offshore Global Note, as the case may be, shall
be deemed to be surrendered to the Trustee for cancellation, and the Company
shall execute, and the Trustee shall authenticate and deliver, to each
beneficial owner identified by the Depositary in exchange for its beneficial
interest in the U.S. Global Note or Offshore Global Note, as the case may be, an
equal aggregate principal amount of U.S. Physical Notes or Offshore Physical
Notes, as the case may be, of authorized denominations.

          (f) Any U.S. Physical Note delivered in exchange for an interest in
the U.S. Global Note pursuant to paragraph (b), (d) or (e) of this Section
shall, except as otherwise provided

<PAGE>

by paragraph (e) of Section 2.08, bear the legend regarding transfer
restrictions applicable to the U.S. Physical Note set forth in Section 2.02.

          (g) Any Offshore Physical Note delivered in exchange for an interest
in the Offshore Global Note pursuant to paragraph (b), (d) or (e) of this
Section shall, except as otherwise provided by paragraph (e) of Section 2.08,
bear the legend regarding transfer restrictions applicable to the Offshore
Physical Note set forth in Section 2.02.

          (h) The registered holder of a Global Note may grant proxies and
otherwise authorize any person, including Agent Members and persons that may
hold interests through Agent Members, to take any action which a Holder is
entitled to take under this Indenture or the Notes.

          (i) Beneficial owners of interests in a U.S. Global Note may receive
U.S. Physical Notes (which shall bear the Private Placement Legend if required
by Section 2.02) in accordance with the procedures of the Depositary. In
connection with the execution, authentication and delivery of such U.S. Physical
Notes, the Registrar shall reflect on its books and records a decrease in the
principal amount of the relevant U.S. Global Note equal to the principal amount
of such U.S. Physical Notes and the Company shall execute and the Trustee shall
authenticate and deliver one or more U.S. Physical Notes having an equal
aggregate principal amount.

          SECTION 2.08. Special Transfer Provisions. Unless and until a Note is
exchanged for an Exchange Note in connection with an effective Registration
Statement pursuant to the Registration Rights Agreement, the following
provisions shall apply:

          (a) Transfers to Non-QIB Institutional Accredited Investors. The
following provisions shall apply with respect to the registration of any
proposed transfer of a Note to any Institutional Accredited Investor which is
not a QIB (excluding Non-U.S. Persons):

          (i) The Registrar shall register the transfer of any Note, whether or
     not such Note bears the Private Placement Legend, if (x) the requested
     transfer is after the time period referred to in Rule 144(k) under the
     Securities Act as in effect with respect to such transfer or (y) the
     proposed transferee has delivered to the Registrar (A) a certificate
     substantially in the form of Exhibit C hereto and (B) if the aggregate
     principal amount of the Notes being transferred is less than $100,000 at
     the time of such transfer, an opinion of counsel acceptable to the Company
     that such transfer is in compliance with the Securities Act.

          (ii) If the proposed transferor is an Agent Member holding a
     beneficial interest in the U.S. Global Note, upon receipt by the Registrar
     of (x) the documents, if any, required by paragraph (i) and (y)
     instructions given in accordance with the Depositary's and the Registrar's
     procedures, the Registrar shall reflect on its books and records the date
     and a decrease in the principal amount of the U.S. Global Note in an amount
     equal to the principal amount of the beneficial interest in the U.S. Global
     Note to be transferred, and the Company shall execute, and the Trustee
     shall authenticate and deliver, one or more U.S. Physical Notes of like
     tenor and amount.

          (b) Transfers to QIBs. The following provisions shall apply with
respect to the registration of any proposed transfer of a U.S. Physical Note, an
interest in a U.S. Global Note or an interest in an Offshore Global Note prior
to the removal of the Private Placement Legend to a QIB (excluding Non-U.S.
Persons):

          (i) If the Note to be transferred consists of (x) either (A) an
     interest in a Offshore Global Note prior to the removal of the Private
     Placement Legend or (B) U.S. Physical

<PAGE>

         Notes, the Registrar shall register the transfer if such transfer is
         being made by a proposed transferor who has checked the box provided
         for on the form of Note stating, or has otherwise advised the Company
         and the Registrar in writing, that the sale has been made in compliance
         with the provisions of Rule 144A to a transferee who has signed the
         certification provided for on the form of Note stating, or has
         otherwise advised the Company and the Registrar in writing, that it is
         purchasing the Note for its own account or an account with respect to
         which it exercises sole investment discretion and that it and any such
         account is a QIB within the meaning of Rule 144A, and is aware that the
         sale to it is being made in reliance on Rule 144A and acknowledges that
         it has received such information regarding the Company as it has
         requested pursuant to Rule 144A or has determined not to request such
         information and that it is aware that the transferor is relying upon
         its foregoing representations in order to claim the exemption from
         registration provided by Rule 144A or (y) an interest in the U.S.
         Global Notes, the transfer of such interest may be effected only
         through the book entry system maintained by the Depositary.

          (ii) If the proposed transferee is an Agent Member, and the Note to be
     transferred consists of U.S. Physical Notes, upon receipt by the Registrar
     of the documents referred to in clause (i) and instructions given in
     accordance with the Depositary's and the Registrar's procedures, the
     Registrar shall reflect on its books and records the date and an increase
     in the principal amount of the U.S. Global Notes in an amount equal to the
     principal amount of the U.S. Physical Notes, to be transferred, and the
     Trustee shall cancel the U.S. Physical Notes so transferred.

          (c) Transfers of Interests in the Offshore Global Note or Offshore
Physical Notes. The following provisions shall apply with respect to any
transfer of interests in the Offshore Global Notes or Offshore Physical Notes:

          (i) prior to the removal of the Private Placement Legend from a
     Offshore Global Note or Offshore Physical Note pursuant to Section 2.02,
     the Registrar shall refuse to register such transfer unless such transfer
     complies with Section 2.08(b) or Section 2.08(d), as the case may be; and

          (ii) after such removal, the Registrar shall register the transfer of
     any such Note without requiring any additional certification.

          (d) Transfers to Non-U.S. Persons at Any Time. The following
provisions shall apply with respect to any transfer of a Note to a Non-U.S.
Person:

          (i) The Registrar shall register any proposed transfer to any Non-U.S.
     Person if the Note to be transferred is a U.S. Physical Note or an interest
     in the U.S. Global Note only upon receipt of a certificate substantially in
     the form of Exhibit D from the proposed transferor.

          (ii) (a) If the proposed Transferor is an Agent Member holding a
     beneficial interest in a U.S. Global Note, upon receipt by the Registrar of
     (x) the documents required by paragraph (i) and (y) instructions in
     accordance with the Depositary's and the Registrar's procedures, the
     Registrar shall reflect on its books and records the date and a decrease in
     the principal amount of such U.S. Global Note in an amount equal to the
     principal amount of the beneficial interest in the U.S. Global Note to be
     transferred, and (b) if the proposed transferee is an Agent Member, upon
     receipt by the Registrar of instructions given in accordance with the
     Depositary's and the Registrar's procedures, the Registrar shall reflect on
     its books and records the date and an increase in the principal amount of
     the Offshore Global Note in an

<PAGE>

     amount equal to the principal amount of the U.S. Physical Notes or the U.S.
     Global Note, as the case may be, to be transferred, and the Trustee shall
     cancel the Physical Note, if any, so transferred or decrease the amount of
     the U.S. Global Note.

          (e) Private Placement Legend. Upon the transfer, exchange or
replacement of Notes not bearing the Private Placement Legend, the Registrar
shall deliver Notes that do not bear the Private Placement Legend. Upon the
transfer, exchange or replacement of Notes bearing the Private Placement Legend,
the Registrar shall deliver only Notes that bear the Private Placement Legend
unless either (i) the circumstances contemplated by paragraphs (a)(i)(x) or
(c)(ii) of this Section 2.08 exist or (ii) there is delivered to the Registrar
an Opinion of Counsel reasonably satisfactory to the Company and the Trustee to
the effect that neither such legend nor the related restrictions on transfer are
required in order to maintain compliance with the provisions of the Securities
Act.

          (f) General. By its acceptance of any Note bearing the Private
Placement Legend, each Holder of such a Note acknowledges the restrictions on
transfer of such Note set forth in this Indenture and in the Private Placement
Legend and agrees that it will transfer such Note only as provided in this
Indenture. The Registrar shall not register a transfer of any Note unless such
transfer complies with the restrictions on transfer of such Note set forth in
this Indenture. In connection with any transfer of Notes, each Holder agrees by
its acceptance of the Notes to furnish the Registrar or the Company such
certifications, legal opinions or other information as either of them may
reasonably require to confirm that such transfer is being made pursuant to an
exemption from, or a transaction not subject to, the registration requirements
of the Securities Act; provided that the Registrar shall not be required to
determine (but may conclusively rely on a determination made by the Company with
respect to) the sufficiency of any such certifications, legal opinions or other
information.

          The Registrar shall retain copies of all letters, notices and other
written communications received pursuant to Section 2.07 or this Section 2.08.
The Company shall have the right to inspect and make copies of all such letters,
notices or other written communications at any reasonable time upon the giving
of reasonable written notice to the Registrar.

          SECTION 2.09. Replacement Notes. If a mutilated Note is surrendered to
the Trustee or if the Holder claims that the Note has been lost, destroyed or
wrongfully taken, then, in the absence of notice to the Company or the Trustee
that such Note has been acquired by a bona fide purchaser, the Company shall
issue and the Trustee shall authenticate a replacement Note of like tenor and
principal amount; provided that the requirements of this Section 2.09 are met.
If required by the Trustee or the Company, an indemnity bond must be furnished
that is sufficient in the judgment of both the Trustee and the Company to
protect the Company, the Trustee or any Agent from any loss that any of them may
suffer if a Note is replaced. The Company may charge such Holder for the
expenses of the Company and the Trustee in replacing a Note. In case any such
mutilated, lost, destroyed or wrongfully taken Note has become or is about to
become due and payable, the Company in its discretion may pay such Note instead
of issuing a new Note in replacement thereof.

          Every replacement Note is an additional obligation of the Company and
shall be entitled to the benefits of this Indenture.

          The provisions of this Section 2.09 are exclusive and shall preclude
(to the extent lawful) all other rights and remedies against the Company and the
Trustee with respect to the replacement or payment of mutilated, destroyed, lost
or wrongfully taken Notes.

<PAGE>

          SECTION 2.10. Outstanding Notes. Notes outstanding at any time are all
Notes that have been authenticated by the Trustee except for those cancelled by
it, those delivered to it for cancellation and those described in this Section
2.10 as not outstanding.

          If a Note is replaced pursuant to Section 2.09, it ceases to be
outstanding unless and until the Trustee and the Company receive proof
satisfactory to each of them that the replaced Note is held by a bona fide
purchaser.

          If the Paying Agent (other than the Company or an Affiliate of the
Company) holds on a Redemption Date or the Stated Maturity of the Notes money
sufficient to pay Notes payable on that date, then on and after that date such
Notes cease to be outstanding and interest on them shall cease to accrue.

          Notes, or portions thereof, for the payment or redemption of which
moneys or U.S. Government Obligations (as provided for in Article Eight) in the
necessary amount shall have been deposited in trust with the Trustee or with any
Paying Agent (other than the Company) or shall have been set aside, segregated
and held in trust by the Company for the Holders of such Notes (if the Company
shall act as its own Paying Agent), on and after that time shall cease to be
outstanding and, in the case of redemption, interest on such Notes shall cease
to accrue, provided that if such Notes, or portions thereof, are to be redeemed
prior to the maturity thereof, notice of such redemption shall have been given
as herein provided, or provision satisfactory to the Trustee shall have been
made for giving such notice.

          A Note does not cease to be outstanding because the Company or one of
its Affiliates holds such Note, provided, however, that, in determining whether
the Holders of the requisite principal amount of the outstanding Notes have
given any request, demand, authorization, direction, notice, consent or waiver
hereunder, Notes owned by the Company or any other obligor upon the Notes or any
Affiliate of the Company or of such other obligor shall be disregarded and
deemed not to be outstanding, except that, in determining whether the Trustee
shall be protected in relying upon any such request, demand, authorization,
direction, notice, consent or waiver, only Notes which the Trustee has actual
knowledge to be so owned shall be so disregarded. Notes so owned which have been
pledged in good faith may be regarded as outstanding if the pledgee establishes
to the satisfaction of the Trustee the pledgee's right so to act with respect to
such Notes and that the pledgee is not the Company or any other obligor upon the
Notes or any Affiliate of the Company or of such other obligor.

          SECTION 2.11. Temporary Notes. Until definitive Notes are ready for
delivery, the Company may prepare and execute and the Trustee shall authenticate
temporary Notes. Temporary Notes shall be substantially in the form of
definitive Notes but may have insertions, substitutions, omissions and other
variations determined to be appropriate by the Officers executing the temporary
Notes, as evidenced by their execution of such temporary Notes. If temporary
Notes are issued, the Company will cause definitive Notes to be prepared without
unreasonable delay. After the preparation of definitive Notes, the temporary
Notes shall be exchangeable for definitive Notes upon surrender of the temporary
Notes at the office or agency of the Company designated for such purpose
pursuant to Section 4.02, without charge to the Holder. Upon surrender for
cancellation of any one or more temporary Notes the Company shall execute and
the Trustee shall authenticate and deliver in exchange therefor a like principal
amount of definitive Notes of authorized denominations. Until so exchanged, the
temporary Notes shall be entitled to the same benefits under this Indenture as
definitive Notes.

          SECTION 2.12. Cancellation. The Company at any time may deliver, or
cause to be delivered, Notes to the Trustee for cancellation. The Registrar and
the Paying Agent shall

<PAGE>

forward to the Trustee any Notes surrendered to them for transfer, exchange or
payment. The Trustee (and no one else) shall cancel all Notes surrendered for
transfer, exchange, payment, replacement or cancellation and shall destroy them
in accordance with its normal procedure.

          SECTION 2.13. CUSIP Numbers. The Company in issuing the Notes may use
"CUSIP," "CINS" and "ISIN" numbers (if then generally in use), and the Trustee
shall use CUSIP, CINS or ISIN numbers, as the case may be, in notices of
redemption or exchange as a convenience to Holders; provided that any such
notice shall state that no representation is made as to the correctness of such
CUSIP, CINS or ISIN numbers either as printed on the Notes or as contained in
any notice of redemption or exchange and that reliance may be placed only on the
other identification numbers printed on the Notes; and provided further that
failure to use CUSIP, CINS or ISIN numbers in any notice of redemption or
exchange shall not affect the validity or sufficiency of such notice. The
Company shall promptly notify the Trustee of any change in CUSIP numbers.

          SECTION 2.14. Defaulted Interest. If the Company defaults in a payment
of interest on the Notes, it shall pay, or shall deposit with the Paying Agent
money in immediately available funds sufficient to pay the defaulted interest,
plus (to the extent lawful) any interest payable on the defaulted interest, to
the Persons who are Holders on a subsequent special record date. A special
record date, as used in this Section 2.14 with respect to the payment of any
defaulted interest, shall mean the 15th day next preceding the date fixed by the
Company for the payment of defaulted interest, whether or not such day is a
Business Day. At least 15 days before the subsequent special record date, the
Company shall mail to each Holder and to the Trustee a notice that states the
subsequent special record date, the payment date and the amount of defaulted
interest to be paid.

          SECTION 2.15. Issuance of Additional Notes. The Company may, subject
to Article Four of this Indenture, issue additional Notes under this Indenture.
The Notes issued on the Closing Date and any additional Notes subsequently
issued shall be treated as a single class for all purposes under this Indenture.

                                  ARTICLE THREE
                                   REDEMPTION

          SECTION 3.01. Right of Redemption. (a) The Notes will also be
redeemable, at the Company's option, in whole or in part, at any time or from
time to time, on or after August 1, 2002 and prior to maturity, upon not less
than 30 nor more than 60 days' prior notice mailed by first class mail to each
Holders' last address as it appears in the Note Register, at the following
Redemption Prices (expressed in percentages of principal amount), plus accrued
and unpaid interest, if any, to the Redemption Date (subject to the right of
Holders of record on the relevant Regular Record Date that is on or prior to the
Redemption Date to receive interest due on an Interest Payment Date), if
redeemed during the 12-month period commencing August 1 of the years set forth
below:

Redemption

                  Year

       Price

                  2002     ...................    105.250%
                  2003     ...................    102.625%

<PAGE>

          (b) In addition, at any time prior to August 1, 2000, the Company may
redeem up to 35% of the principal amount of the Notes with the proceeds of one
or more sales of its Common Stock, at any time or from time to time in part, at
a Redemption Price (expressed as a percentage of principal amount) of 110.50%,
plus accrued and unpaid interest to the Redemption Date (subject to the rights
of Holders of record on the relevant Regular Record Date that is prior to the
Redemption Date to receive interest due on an Interest Payment Date); provided
that at least $65 million aggregate principal amount of Notes remains
outstanding after each such redemption.

          (c) In the event that more than 98% of the outstanding principal
amount of the Notes are tendered pursuant to an Offer to Purchase, as required
by Section 4.11 or Section 4.12, the balance of the Notes will be redeemable, at
the Company's option, in whole or in part, at any time or from time to time
thereafter and prior to maturity, upon not less than 30 nor more than 60 days'
prior notice mailed by first class mail to each Holder's last address as it
appears in the Note Register, at a Redemption Price equal to the price specified
in such Offer to Purchase plus accrued and unpaid interest, if any, to the
Redemption Date (subject to the right of Holders of record on the relevant
Regular Record Date that is on or prior to the Redemption Date to receive
interest due on an Interest Payment Date).

          SECTION 3.02. Notices to Trustee. If the Company elects to redeem
Notes pursuant to Section 3.01(a), (b) or (c), it shall notify the Trustee in
writing of the Redemption Date, the principal amount at Stated Maturity of Notes
to be redeemed and the clause of this Indenture pursuant to which the redemption
shall occur.

          The Company shall give each notice provided for in this Section 3.02
in an Officers' Certificate at least 45 days before the Redemption Date (unless
a shorter period shall be satisfactory to the Trustee).

          SECTION 3.03. Selection of Notes to Be Redeemed. If less than all of
the Notes are to be redeemed at any time, the Trustee will select the Notes, or
portions thereof, for redemption in compliance with the requirements of the
principal national securities exchange, if any, on which the Notes are listed
or, if the Notes are not listed on a national securities exchange, by lot or by
such other method as the Trustee in its sole discretion shall deem to be fair
and appropriate; provided that no Note of $1,000 in principal amount or less
shall be redeemed in part. If any Note is to be redeemed in part only, the
notice of redemption relating to such Note shall state the portion of the
principal amount thereof to be redeemed. A new Note in principal amount equal to
the unredeemed portion thereof will be issued in the name of the Holder thereof
upon cancellation of the original Note.

          The Trustee shall make the selection from the Notes outstanding and
not previously called for redemption. Notes in denominations of $1,000 in
principal amount at Stated Maturity may only be redeemed in whole. The Trustee
may select for redemption portions (equal to $1,000 in principal amount at
Stated Maturity or any integral multiple thereof) of Notes that have
denominations larger than $1,000 in principal amount at Stated Maturity.
Provisions of this Indenture that apply to Notes called for redemption also
apply to portions of Notes called for redemption. The Trustee shall notify the
Company and the Registrar promptly in writing of the Notes or portions of Notes
to be called for redemption.

          SECTION 3.04. Notice of Redemption. With respect to any redemption of
Notes pursuant to Section 3.01(a), (b) or (c), at least 30 days but not more
than 60 days before a Redemption Date the Company shall mail or cause to be
mailed, a notice of redemption by first class mail (pursuant to the requirements
of Section 11.02) to each Holder whose Notes are to be redeemed.

<PAGE>

          The notice shall identify the Notes to be redeemed and shall state:

          (i) the Redemption Date;

          (ii) the Redemption Price;

          (iii) the name and address of the Paying Agent;

          (iv) that Notes called for redemption must be surrendered to the
     Paying Agent in order to collect the Redemption Price;

          (v) that, unless the Company defaults in making the redemption
     payment, interest on Notes called for redemption ceases to accrue on and
     after the Redemption Date and the only remaining right of the Holders is to
     receive payment of the Redemption Price plus accrued and unpaid interest to
     the Redemption Date upon surrender of the Notes to the Paying Agent;

          (vi) that, if any Note is being redeemed in part, the portion of the
     principal amount (equal to $1,000 in principal amount at Stated Maturity or
     any integral multiple thereof) of such Note to be redeemed and that, on and
     after the Redemption Date, upon surrender of such Note, a new Note or Notes
     in principal amount equal to the unredeemed portion thereof will be
     reissued;

          (vii) that, if any Note contains a CUSIP, CINS or ISIN number as
     provided in Section 2.13, no representation is being made as to the
     correctness of the CUSIP, CINS or ISIN number either as printed on the
     Notes or as contained in the notice of redemption and that reliance may be
     placed only on the other identification numbers printed on the Notes; and

          (viii) the aggregate principal amount at Stated Maturity of Notes
     being redeemed.

          At the Company's request (which request may be revoked by the Company
at any time prior to the time at which the Trustee shall have given such notice
to the Holders), made in writing to the Trustee, at least 45 days (or such
shorter period as shall be satisfactory to the Trustee) before a Redemption
Date, the Trustee shall give the notice of redemption in the name and at the
expense of the Company. If, however, the Company gives such notice to the
Holders, the Company shall concurrently deliver to the Trustee an Officers'
Certificate stating that such notice has been given.

          SECTION 3.05. Effect of Notice of Redemption. Once notice of
redemption is mailed, Notes called for redemption become due and payable on the
Redemption Date and at the Redemption Price. Upon surrender of any Notes to the
Paying Agent, such Notes shall be paid at the Redemption Price, plus accrued and
unpaid interest to the Redemption Date.

          Notice of redemption shall be deemed to be given when mailed, whether
or not the Holder receives the notice. In any event, failure to give such
notice, or any defect therein, shall not affect the validity of the proceedings
for the redemption of Notes held by Holders to whom such notice was properly
given.

          SECTION 3.06. Deposit of Redemption Price. On or prior to 10:00 a.m.
New York City time on any Redemption Date, the Company shall deposit with the
Paying Agent (or, if the Company is acting as its own Paying Agent, shall
segregate and hold in trust as provided in Section

<PAGE>

2.05) money in immediately available funds sufficient to pay the Redemption
Price of and accrued and unpaid interest on all Notes to be redeemed on that
date other than Notes or portions thereof called for redemption on that date
that have been delivered by the Company to the Trustee for cancellation.

          SECTION 3.07. Payment of Notes Called for Redemption. If notice of
redemption has been given in the manner provided above, the Notes or portion of
Notes specified in such notice to be redeemed shall become due and payable on
the Redemption Date at the Redemption Price stated therein, together with
accrued and unpaid interest to such Redemption Date, and on and after such date
(unless the Company shall default in the payment of such Notes at the Redemption
Price and accrued and unpaid interest to the Redemption Date, in which case the
principal, until paid, shall bear interest from the Redemption Date at the rate
prescribed in the Notes), such Notes shall cease to accrue interest. Upon
surrender of any Note for redemption in accordance with a notice of redemption,
such Note shall be paid and redeemed by the Company at the Redemption Price,
together with accrued and unpaid interest to the Redemption Date; provided that
installments of interest whose record date is prior to the Redemption Date shall
be payable to the Holders registered as such at the close of business such
record date, if any.

          SECTION 3.08. Notes Redeemed in Part. Upon surrender of any Note that
is redeemed in part, the Company shall at its expense issue and execute and the
Trustee shall authenticate and deliver for the Holder a new Note equal in
principal amount to the unredeemed portion of such surrendered Note.

                                  ARTICLE FOUR
                                    COVENANTS

          SECTION 4.01. Payment of Notes. The Company shall pay the principal
of, premium, if any, and interest on the Notes on the dates and in the manner
provided in the Notes and this Indenture. An installment of principal, premium,
if any, or interest shall be considered paid on the date due if the Trustee or
Paying Agent (other than the Company, a Subsidiary of the Company, or any
Affiliate of any of them) holds as of 10:00 A.M. New York City time on the due
date money deposited by the Company in immediately available funds and
designated for and sufficient to pay the installment. If the Company or any
Subsidiary of the Company or any Affiliate of any of them, acts as Paying Agent,
an installment of principal, premium, if any, or interest shall be considered
paid on the due date if the entity acting as Paying Agent complies with the last
sentence of Section 2.05. As provided in Section 6.09, upon any bankruptcy or
reorganization procedure relative to the Company, the Trustee shall serve as the
Paying Agent and conversion agent, if any, for the Notes.

          The Company shall pay interest on overdue principal, premium, if any,
and interest on overdue installments of interest, to the extent lawful, at the
rate per annum specified in the Notes.

          SECTION 4.02. Maintenance of Office or Agency. The Company will
maintain an office or agency where Notes may be surrendered for registration of
transfer or exchange or for presentation for payment and where notices and
demands to or upon the Company in respect of the Notes and this Indenture may be
served. The Company will give prompt written notice to the Trustee of the
location, and any change in the location, of such office or agency. If at any
time the Company shall fail to maintain any such required office or agency or
shall fail to furnish the Trustee with the address thereof, such presentations,
surrenders, notices and demands may be made or served at the address of the
Trustee set forth in Section 11.02.

<PAGE>

          The Company may also from time to time designate one or more other
offices or agencies where the Notes may be presented or surrendered for any or
all such purposes and may from time to time rescind such designations. The
Company shall give prompt written notice to the Trustee of any such designation
or rescission and of any change in the location of any such other office or
agency.

          The Company hereby initially designates the [ ] of the Trustee as such
office of the Company in accordance with Section 2.04.

          SECTION 4.03. Limitation on Indebtedness. (a) The Company will not,
and will not permit any of its Restricted Subsidiaries to, Incur any
Indebtedness (other than the Notes, the Note Guarantees and Indebtedness
existing on the Closing Date); provided that the Company may Incur Indebtedness
if, after giving effect to the Incurrence of such Indebtedness and the receipt
and application of the proceeds therefrom, the Interest Coverage Ratio would be
greater than 3:1.

          Notwithstanding the foregoing, the Company and any Restricted
Subsidiary (except as specified below) may Incur each and all of the following:
(i) Indebtedness of the Company or any Restricted Subsidiary that is a Guarantor
outstanding at any time under the Credit Agreement; provided, that after giving
effect to the Incurrence of any such Indebtedness, the book value of assets of
the Company not subject to any Lien (other than Liens described in clauses (i)
through (v), (xiii) and (xvi) of the definition of "Permitted Liens") shall not
be less than $125 million; (ii) Indebtedness owed (A) to the Company evidenced
by an unsubordinated promissory note or (B) to any of its Restricted
Subsidiaries; provided that any event which results in any such Restricted
Subsidiary ceasing to be a Restricted Subsidiary or any subsequent transfer of
such Indebtedness (other than to the Company or another Restricted Subsidiary)
shall be deemed, in each case, to constitute an Incurrence of such Indebtedness
not permitted by this clause (ii); (iii) Indebtedness issued in exchange for, or
the net proceeds of which are used to refinance or refund, then outstanding
Indebtedness Incurred under clause (v) of this paragraph and any refinancings
thereof in an amount not to exceed the amount so refinanced or refunded (plus
premiums, accrued interest, fees and expenses); provided that Indebtedness the
proceeds of which are used to refinance or refund the Notes or Indebtedness that
is pari passu with, or subordinated in right of payment to, the Notes or Note
Guarantees shall only be permitted under this clause (iii) if (A) in case the
Notes are refinanced in part or the Indebtedness to be refinanced is pari passu
with the Notes or Note Guarantees, such new Indebtedness, by its terms or by the
terms of any agreement or instrument pursuant to which such new Indebtedness is
outstanding, is expressly made pari passu with, or subordinate in right of
payment to, the remaining Notes or Note Guarantees, as the case may be, (B) in
case the Indebtedness to be refinanced is subordinated in right of payment to
the Notes or Note Guarantees, as the case may be, such new Indebtedness, by its
terms or by the terms of any agreement or instrument pursuant to which such new
Indebtedness is issued or remains outstanding, is expressly made subordinate in
right of payment to the Notes or the Note Guarantees, as the case may be, at
least to the extent that the Indebtedness to be refinanced is subordinated to
the Notes or the Note Guarantees, as the case may be, and (C) such new
Indebtedness, determined as of the date of Incurrence of such new Indebtedness,
does not mature prior to the Stated Maturity of the Indebtedness to be
refinanced or refunded, and the Average Life of such new Indebtedness is at
least equal to the remaining Average Life of the Indebtedness to be refinanced
or refunded; and provided further that in no event may Indebtedness of the
Company be refinanced by means of any Indebtedness of any Restricted Subsidiary
pursuant to this clause (iii) (other than pursuant to an Offer to Purchase);
(iv) Indebtedness (A) in respect of performance, surety or appeal bonds provided
in the ordinary course of business, (B) under Currency Agreements and Interest
Rate Agreements; provided that such agreements (a) are designed solely to
protect the Company or its Restricted Subsidiaries against fluctuations in
foreign currency exchange rates or interest rates and (b) do not increase the
Indebtedness of the obligor outstanding at any time other than as a result of
fluctuations

<PAGE>

in foreign currency exchange rates or interest rates or by reason of fees,
indemnities and compensation payable thereunder; and (C) arising from agreements
providing for indemnification, adjustment of purchase price or similar
obligations, or from Guarantees or letters of credit, surety bonds or
performance bonds securing any obligations of the Company or any of its
Restricted Subsidiaries pursuant to such agreements, in any case Incurred in
connection with the disposition of any business, assets or Restricted Subsidiary
(other than Guarantees of Indebtedness Incurred by any Person acquiring all or
any portion of such business, assets or Restricted Subsidiary for the purpose of
financing such acquisition), in a principal amount not to exceed the gross
proceeds actually received by the Company or any Restricted Subsidiary in
connection with such disposition; (v) Indebtedness of the Company, to the extent
the net proceeds thereof are promptly (A) used to purchase Notes tendered in an
Offer to Purchase made as a result of a Change in Control or (B) deposited to
defease the Notes as described below under "Defeasance"; (vi) Guarantees of the
Notes, Guarantees by the Company or Restricted Subsidiaries of Indebtedness of
ATA under the Credit Agreement, and Guarantees of Indebtedness of the Company by
any Restricted Subsidiary provided the Guarantee of such Indebtedness is
permitted by and made in accordance with Section 4.07; (vii) Indebtedness of the
Company or any Restricted Subsidiary Incurred to finance the cost of aircraft,
engines and buyer-furnished equipment attached thereto or incorporated therein;
provided, that such Indebtedness is created solely for the purpose of financing
the costs (including transaction costs and the costs of improvement or
construction) of property or assets and is incurred prior to, at the time of or
within 12 months after, the later of the acquisition, the completion of
construction or the commencement of full operation of such property or assets,
and (b) the principal amount of such Indebtedness does not exceed 100% of such
costs; and (viii) Indebtedness of the Company (in addition to Indebtedness
permitted under clauses (i) through (vii) above) in an aggregate principal
amount outstanding at any time not to exceed $10 million.

          (b) Notwithstanding any other provision of this Section 4.03,
the maximum amount of Indebtedness that the Company or a Restricted Subsidiary
may Incur pursuant to this Section 4.03 shall not be deemed to be exceeded, with
respect to any outstanding Indebtedness due solely to the result of fluctuations
in the exchange rates of currencies.

          (c) For purposes of determining any particular amount of Indebtedness
under this Section 4.03, (1) Indebtedness Incurred under the Credit Agreement on
or prior to the Closing Date shall be treated as Incurred pursuant to clause (i)
of the second paragraph of this Section 4.03, (2) Guarantees, Liens or
obligations with respect to letters of credit supporting Indebtedness otherwise
included in the determination of such particular amount shall not be included
and (3) any Liens granted pursuant to the equal and ratable provisions referred
to in Section 4.09 shall not be treated as Indebtedness. For purposes of
determining compliance with this Section 4.03, in the event that an item of
Indebtedness meets the criteria of more than one of the types of Indebtedness
described in the above clauses (other than Indebtedness referred to in clause
(1) of the preceding sentence), the Company, in its sole discretion, shall
classify such item of Indebtedness and only be required to include the amount
and type of such Indebtedness in one of such clauses.

          SECTION 4.04. Limitation on Restricted Payments. The Company will not,
and will not permit any Restricted Subsidiary to, directly or indirectly, (i)
declare or pay any dividend or make any distribution on or with respect to its
Capital Stock (other than (x) dividends or distributions payable solely in
shares of its Capital Stock (other than Disqualified Stock) or in options,
warrants or other rights to acquire shares of such Capital Stock and (y) pro
rata dividends or distributions on Common Stock of Restricted Subsidiaries held
by minority stockholders) held by Persons other than the Company or any of its
Restricted Subsidiaries, (ii) purchase, redeem, retire or otherwise acquire for
value any shares of Capital Stock of (A) the Company or an Unrestricted
Subsidiary (including options, warrants or other rights to acquire such shares
of Capital Stock) held by any Person or (B) a Restricted Subsidiary (including
options, warrants or other rights to acquire

<PAGE>

such shares of Capital Stock) held by any Affiliate of the Company (other than a
Wholly Owned Restricted Subsidiary) or any holder (or any Affiliate of such
holder) of 5% or more of the Capital Stock of the Company, (iii) make any
voluntary or optional principal payment, or voluntary or optional redemption,
repurchase, defeasance, or other acquisition or retirement for value, of
Indebtedness of the Company or any Guarantor that is subordinated in right of
payment to the Notes or to a Guarantor's Note Guarantee, as the case may be, or
(iv) make any Investment, other than a Permitted Investment, in any Person (such
payments or any other actions described in clauses (i) through (iv) above being
collectively "Restricted Payments") if, at the time of, and after giving effect
to, the proposed Restricted Payment: (A) a Default or Event of Default shall
have occurred and be continuing, (B) the Company could not Incur at least $1.00
of Indebtedness under the first paragraph of Section 4.03 or (C) the aggregate
amount of all Restricted Payments (the amount, if other than in cash, to be
determined in good faith by the Board of Directors, whose determination shall be
conclusive and evidenced by a Board Resolution) made after the Closing Date
shall exceed the sum of (1) 50% of the aggregate amount of the Adjusted
Consolidated Net Income (or, if the Adjusted Consolidated Net Income is a loss,
minus 100% of the amount of such loss) (determined by excluding income resulting
from transfers of assets by the Company or a Restricted Subsidiary to an
Unrestricted Subsidiary) accrued on a cumulative basis during the period (taken
as one accounting period) beginning on the first day of the fiscal quarter
immediately following the Closing Date and ending on the last day of the last
fiscal quarter preceding the Transaction Date for which reports have been filed
with the Commission or provided to the Trustee pursuant to Section 4.17, plus
(2) the aggregate Net Cash Proceeds received by the Company after the Closing
Date from the issuance and sale permitted by the Indenture of its Capital Stock
(other than Disqualified Stock) to a Person who is not a Subsidiary of the
Company, including an issuance or sale permitted by the Indenture of
Indebtedness of the Company for cash subsequent to the Closing Date upon the
conversion of such Indebtedness into Capital Stock (other than Disqualified
Stock) of the Company, or from the issuance to a Person who is not a Subsidiary
of the Company of any options, warrants or other rights to acquire Capital Stock
of the Company (in each case, exclusive of any Disqualified Stock or any
options, warrants or other rights that are redeemable at the option of the
holder, or are required to be redeemed, prior to the Stated Maturity of the
Notes), plus (3) an amount equal to the net reduction in Investments (other than
reductions in Permitted Investments) in any Person resulting from payments of
interest on Indebtedness, dividends, repayments of loans or advances, or other
transfers of assets, in each case to the Company or any Restricted Subsidiary or
from the Net Cash Proceeds from the sale of any such Investment (except, in each
case, to the extent any such payment or proceeds are included in the calculation
of Adjusted Consolidated Net Income), or from redesignations of Unrestricted
Subsidiaries as Restricted Subsidiaries (valued in each case as provided in the
definition of "Investments"), not to exceed, in each case, the amount of
Investments previously made by the Company or any Restricted Subsidiary in such
Person or Unrestricted Subsidiary, minus (4) the sum of the amounts by which the
Pro Forma Consolidated Net Worth after giving effect to each consolidation,
merger and sale of assets effectuated pursuant to clause (iii) under Section
5.01 was less than the Base Consolidated Net Worth immediately prior to such
consolidation, merger and sale of assets, plus (5) $5 million.

          The foregoing provision shall not be violated by reason of: (i) the
payment of any dividend within 60 days after the date of declaration thereof if,
at said date of declaration, such payment would comply with the foregoing
paragraph; (ii) the redemption, repurchase, defeasance or other acquisition or
retirement for value of Indebtedness that is subordinated in right of payment to
the Notes including premium, if any, and accrued and unpaid interest, with the
proceeds of, or in exchange for, Indebtedness Incurred under clause (iii) of the
second paragraph of part (a) of Section 4.03; (iii) the repurchase, redemption
or other acquisition of Capital Stock of the Company or an Unrestricted
Subsidiary (or options, warrants or other rights to acquire such Capital Stock)
in exchange for, or out of the proceeds of a substantially concurrent offering
of, shares of Capital Stock (other than Disqualified Stock) of the Company (or
options, warrants or other rights to acquire such

<PAGE>

Capital Stock); (iv) the making of any principal payment or the repurchase,
redemption, retirement, defeasance or other acquisition for value of
Indebtedness of the Company or any Guarantor which is subordinated in right of
payment to the Notes or the Note Guarantees, as the case may be, in exchange
for, or out of the proceeds of, a substantially concurrent offering of, shares
of the Capital Stock (other than Disqualified Stock) of the Company or any
Guarantor (or options, warrants or other rights to acquire such Capital Stock);
(v) payments or distributions, to dissenting stockholders pursuant to applicable
law, pursuant to or in connection with a consolidation, merger or transfer of
assets that complies with the provisions of the Indenture applicable to mergers,
consolidations and transfers of all or substantially all of the property and
assets of the Company; (vi) Investments acquired in exchange for Capital Stock
(other than Disqualified Stock) of the Company; provided that, except in the
case of clauses (i) and (iii), no Default or Event of Default shall have
occurred and be continuing or occur as a consequence of the actions or payments
set forth therein; or (vii) the purchase or redemption of subordinated
Indebtedness pursuant to asset sale or change of control provisions contained in
the Indenture or other governing instrument relating thereto; provided, however,
that (a) no offer or purchase obligation may be triggered in respect of such
Indebtedness unless a corresponding obligation also arises for the Notes and (b)
in all events, no repurchase or redemption of such Indebtedness may be
consummated unless and until the Company shall have satisfied all repurchase
obligations with respect to any required purchase offer made with respect to the
Notes.

          Each Restricted Payment permitted pursuant to the preceding paragraph
(other than the Restricted Payment referred to in clause (ii) thereof, an
exchange of Capital Stock for Capital Stock or Indebtedness referred to in
clause (iii) or (iv) thereof and an Investment referred to in clause (vi)
thereof), and the Net Cash Proceeds from any issuance of Capital Stock referred
to in clauses (iii) and (iv), shall be included in calculating whether the
conditions of clause (C) of the first paragraph of this Section 4.04 have been
met with respect to any subsequent Restricted Payments. In the event the
proceeds of an issuance of Capital Stock of the Company are used for the
redemption, repurchase or other acquisition of the Notes, or Indebtedness that
is pari passu with the Notes, then the Net Cash Proceeds of such issuance shall
be included in clause (C) of the first paragraph of this Section 4.04 only to
the extent such proceeds are not used for such redemption, repurchase or other
acquisition of Indebtedness.

          SECTION 4.05. Limitation on Dividend and Other Payment Restrictions
Affecting Restricted Subsidiaries. The Company will not, and will not permit any
Restricted Subsidiary to, create or otherwise cause or suffer to exist or become
effective any consensual encumbrance or restriction of any kind on the ability
of any Restricted Subsidiary that is not a Guarantor to (i) pay dividends or
make any other distributions permitted by applicable law on any Capital Stock of
such Restricted Subsidiary owned by the Company or any other Restricted
Subsidiary, (ii) pay any Indebtedness owed to the Company or any other
Restricted Subsidiary, (iii) make loans or advances to the Company or any other
Restricted Subsidiary or (iv) transfer any of its property or assets to the
Company or any other Restricted Subsidiary.

          The foregoing provisions shall not restrict any encumbrances or
restrictions: (i) existing on the Closing Date in the Credit Agreement, the
Indenture or any other agreements in effect on the Closing Date, and any
extensions, refinancings, renewals or replacements of such agreements; provided
that the encumbrances and restrictions in any such extensions, refinancings,
renewals or replacements are no less favorable in any material respect to the
Holders than those encumbrances or restrictions that are then in effect and that
are being extended, refinanced, renewed or replaced; (ii) existing under or by
reason of applicable law; (iii) existing with respect to any Person or the
property or assets of such Person acquired by the Company or any Restricted
Subsidiary, existing at the time of such acquisition and not incurred in
contemplation thereof, which encumbrances or restrictions are not applicable to
any Person or the property or assets of any Person other than such

<PAGE>

Person or the property or assets of such Person so acquired; (iv) in the case of
clause (iv) of the first paragraph of this Section 4.05, (A) that restrict in a
customary manner the subletting, assignment or transfer of any property or asset
that is a lease, license, conveyance or contract or similar property or asset,
(B) existing by virtue of any transfer of, agreement to transfer, option or
right with respect to, or Lien on, any property or assets of the Company or any
Restricted Subsidiary not otherwise prohibited by the Indenture or (C) arising
or agreed to in the ordinary course of business, not relating to any
Indebtedness, and that do not, individually or in the aggregate, detract from
the value of property or assets of the Company or any Restricted Subsidiary in
any manner material to the Company or any Restricted Subsidiary; (v) with
respect to a Restricted Subsidiary and imposed pursuant to an agreement that has
been entered into for the sale or disposition of all or substantially all of the
Capital Stock of, or property and assets of, such Restricted Subsidiary; or (vi)
contained in the terms of any Indebtedness or any agreement pursuant to which
such Indebtedness was issued if (A) the encumbrance or restriction applies only
in the event of a payment default or a default with respect to a financial
covenant contained in such Indebtedness or agreement, (B) the encumbrance or
restriction is not materially more disadvantageous to the Holders of the Notes
than is customary in comparable financings (as determined by the Company) and
(C) the Company determines that any such encumbrance or restriction will not
materially affect the Company's ability to make principal or interest payments
on the Notes. Nothing contained in this Section 4.05 shall prevent the Company
or any Restricted Subsidiary from (1) creating, incurring, assuming or suffering
to exist any Liens otherwise permitted in Section 4.09 or (2) restricting the
sale or other disposition of property or assets of the Company or any of its
Restricted Subsidiaries that secure Indebtedness of the Company or any of its
Restricted Subsidiaries.

          SECTION 4.06. Limitation on the Issuance and Sale of Capital Stock of
Restricted Subsidiaries. The Company will not sell, and will not permit any
Restricted Subsidiary, directly or indirectly, to issue or sell, any shares of
Capital Stock of a Restricted Subsidiary (including options, warrants or other
rights to purchase shares of such Capital Stock) except (i) to the Company or a
Wholly Owned Restricted Subsidiary; (ii) issuances of director's qualifying
shares or sales to foreign nationals of shares of Capital Stock of foreign
Restricted Subsidiaries, to the extent required by applicable law; or (iii) if,
immediately after giving effect to such issuance or sale, such Restricted
Subsidiary would no longer constitute a Restricted Subsidiary and any Investment
in such Person remaining after giving effect to such issuance or sale would have
been permitted to be made under Section 4.04 if made on the date of such
issuance or sale.

          SECTION 4.07. Limitation on Issuances of Guarantees by Restricted
Subsidiaries. The Company will not permit any Restricted Subsidiary that is not
a Guarantor, directly or indirectly, to Guarantee any Indebtedness of the
Company which is pari passu with or subordinate in right of payment to the Notes
("Guaranteed Indebtedness"), unless (i) such Restricted Subsidiary
simultaneously executes and delivers a supplemental indenture to the Indenture
providing for a Guarantee (a "Subsidiary Guarantee") of payment of the Notes by
such Restricted Subsidiary and (ii) such Restricted Subsidiary waives and will
not in any manner whatsoever claim or take the benefit or advantage of, any
rights of reimbursement, indemnity or subrogation or any other rights against
the Company or any other Restricted Subsidiary as a result of any payment by
such Restricted Subsidiary under its Subsidiary Guarantee; provided that this
paragraph shall not be applicable to any Guarantee of any Restricted Subsidiary
that existed at the time such Person became a Restricted Subsidiary and was not
Incurred in connection with, or in contemplation of, such Person becoming a
Restricted Subsidiary. If the Guaranteed Indebtedness is (A) pari passu with the
Notes or the Note Guarantees, then the Guarantee of such Guaranteed Indebtedness
shall be pari passu with, or subordinated to, the Subsidiary Guarantee or (B)
subordinated to the Notes or the Note Guarantees, then the Guarantee of such
Guaranteed Indebtedness shall be subordinated to the Subsidiary Guarantee at
least to the extent that the Guaranteed Indebtedness is subordinated to the
Notes or the Note Guarantees, as the case may be.

<PAGE>

          Notwithstanding the foregoing, any Subsidiary Guarantee by a
Restricted Subsidiary may provide by its terms that it shall be automatically
and unconditionally released and discharged upon (i) any sale, exchange or
transfer, to any Person not an Affiliate of the Company, of all of the Company's
and each Restricted Subsidiary's Capital Stock in, or all or substantially all
the assets of, such Restricted Subsidiary (which sale, exchange or transfer is
not prohibited by the Indenture) or (ii) the release or discharge of the
Guarantee which resulted in the creation of such Subsidiary Guarantee, except a
discharge or release by or as a result of payment under such Guarantee.

          SECTION 4.08. Limitation on Transactions with Shareholders and
Affiliates. The Company will not, and will not permit any Restricted Subsidiary
to, directly or indirectly, enter into, renew or extend any transaction
(including, without limitation, the purchase, sale, lease or exchange of
property or assets, or the rendering of any service) with any holder (or any
Affiliate of such holder) of 5% or more of any class of Capital Stock of the
Company or with any Affiliate of the Company or any Restricted Subsidiary,
except upon fair and reasonable terms no less favorable to the Company or such
Restricted Subsidiary than could be obtained, at the time of such transaction
or, if such transaction is pursuant to a written agreement, at the time of the
execution of the agreement providing therefor, in a comparable arm's-length
transaction with a Person that is not such a holder or an Affiliate.

          The foregoing limitation does not limit, and shall not apply to (i)
transactions (A) approved by a majority of the disinterested members of the
Board of Directors, or (B) for which the Company or a Restricted Subsidiary
delivers to the Trustee a written opinion of a nationally recognized investment
banking firm stating that the transaction is fair to the Company or such
Restricted Subsidiary from a financial point of view; (ii) any transaction
solely between the Company and any of its Wholly Owned Restricted Subsidiaries
or solely between Wholly Owned Restricted Subsidiaries; (iii) the payment of
reasonable and customary regular compensation (whether in cash or securities)
and expense reimbursements to directors of the Company who are not employees of
the Company; (iv) any payments or other transactions pursuant to any tax-sharing
agreement between the Company and any other Person with which the Company files
a consolidated tax return or with which the Company is part of a consolidated
group for tax purposes; or (v) any Restricted Payments not prohibited by Section
4.04. Notwithstanding the foregoing, any transaction or series of related
transactions covered by the first paragraph of this Section 4.08 and not covered
by clauses (ii) through (v) of this paragraph, (a) the aggregate amount of which
exceeds $1 million in value, must be approved or determined to be fair in the
manner provided for in clause (i)(A) or (B) above and (b) the aggregate amount
of which exceeds $3 million in value, must be determined to be fair in the
manner provided for in clause (i)(B) above.

          SECTION 4.09. Limitation on Liens. The Company will not, and will not
permit any Restricted Subsidiary to, create, incur, assume or suffer to exist
any Lien on any of its assets or properties of any character, or any shares of
Capital Stock or Indebtedness of any Restricted Subsidiary, without making
effective provision for all of the Notes (or in the case of a Lien on assets or
properties of a Guarantor, the Note Guarantee of such Guarantor) and all other
amounts due under the Indenture to be directly secured equally and ratably with
(or, if the obligation or liability to be secured by such Lien is subordinated
in right of payment to the Notes or the Note Guarantee, prior to) the obligation
or liability secured by such Lien. The foregoing limitation does not apply to
(i) Liens existing on the Closing Date, including Liens securing obligations
under the Credit Agreement; (ii) Liens granted after the Closing Date on any
assets or Capital Stock of the Company or its Restricted Subsidiaries created in
favor of the Holders; (iii) Liens with respect to the assets of a Restricted
Subsidiary granted by such Restricted Subsidiary to the Company or a Wholly
Owned Restricted Subsidiary to secure Indebtedness owing to the Company or such
other Restricted Subsidiary; (iv) Liens securing Indebtedness which is Incurred
to refinance secured Indebtedness which is permitted to be Incurred under clause
(iii) of the second paragraph of Section 4.03; provided

<PAGE>

that such Liens do not extend to or cover any property or assets of the Company
or any Restricted Subsidiary other than the property or assets securing the
Indebtedness being refinanced; (v) Liens on any property or assets of a
Restricted Subsidiary securing Indebtedness of such Restricted Subsidiary
permitted under Section 4.03; or (vi) Permitted Liens.

          SECTION 4.10. Limitation on Sale-Leaseback Transactions. The Company
will not, and will not permit any Restricted Subsidiary to, enter into any
sale-leaseback transaction involving any of its assets or properties whether now
owned or hereafter acquired, whereby the Company or a Restricted Subsidiary
sells or transfers such assets or properties and then or thereafter leases such
assets or properties or any part thereof or any other assets or properties which
the Company or such Restricted Subsidiary, as the case may be, intends to use
for substantially the same purpose or purposes as the assets or properties sold
or transferred.

          The foregoing restriction does not apply to any sale-leaseback
transaction if (i) the lease is for a period, including renewal rights, of not
in excess of three years; (ii) the lease secures or relates to industrial
revenue or pollution control bonds; (iii) the transaction is solely between the
Company and any Wholly Owned Restricted Subsidiary or solely between Wholly
Owned Restricted Subsidiaries; or (iv) the Company or such Restricted
Subsidiary, within 12 months after the sale or transfer of any assets or
properties is completed, applies an amount not less than the net proceeds
received from such sale in accordance with clause (A) or (B) of the first
paragraph of Section 4.11.

          SECTION 4.11. Limitation on Asset Sales. The Company will not, and
will not permit any Restricted Subsidiary to, consummate any Asset Sale, unless
(i) the consideration received by the Company or such Restricted Subsidiary is
at least equal to the fair market value of the assets sold or disposed of and
(ii) at least 75% of the consideration received (including the fair market
value, as determined in good faith by the Board of Directors, of any non-cash
consideration) consists of (w) cash, (x) Temporary Cash Investments, (y)
marketable securities which are liquidated for cash within 90 days following the
consummation of such Asset Sale, and (z) the assumption of Indebtedness of the
Company or any Restricted Subsidiary (other than the Notes and the Note
Guarantees); provided that (1) such Indebtedness is not subordinate in right of
payment to the Notes and the Note Guarantees and (2) the Company or such
Restricted Subsidiary is irrevocably released and discharged from such
Indebtedness. In the event and to the extent that the Net Cash Proceeds received
by the Company or any of its Restricted Subsidiaries from one or more Asset
Sales occurring on or after the Closing Date in any period of 12 consecutive
months exceed 10% of Adjusted Consolidated Net Tangible Assets (determined as of
the date closest to the commencement of such 12-month period for which a
consolidated balance sheet of the Company and its Subsidiaries has been filed
with the Commission), then the Company shall or shall cause the relevant
Restricted Subsidiary to (i) within twelve months after the date Net Cash
Proceeds so received exceed 10% of Adjusted Consolidated Net Tangible Assets (A)
apply an amount equal to such excess Net Cash Proceeds to permanently repay
unsubordinated Indebtedness of the Company, or any Restricted Subsidiary
providing a Subsidiary Guarantee pursuant to Section 4.07 described above or
Indebtedness of any other Restricted Subsidiary, in each case owing to a Person
other than the Company or any of its Restricted Subsidiaries or (B) invest an
equal amount, or the amount not so applied pursuant to clause (A) (or enter into
a definitive agreement committing to so invest within 12 months after the date
of such agreement), in property or assets (other than current assets) of a
nature or type or that are used in a business (or in a company having property
and assets of a nature or type, or engaged in a business) similar or related to
the nature or type of the property and assets of, or the business of, the
Company and its Restricted Subsidiaries existing on the date of such investment
and (ii) apply (no later than the end of the 12-month period referred to in
clause (i)) such excess Net Cash Proceeds (to the extent not applied pursuant to
clause (i)) as provided in the following paragraph of this Section 4.11. The
amount of such excess Net Cash Proceeds required to be applied (or to be
committed to be applied) during such 12-month period as set forth in clause

<PAGE>

(i) of the preceding sentence and not applied as so required by the end of such
period shall constitute "Excess Proceeds."

          If, as of the first day of any calendar month, the aggregate amount of
Excess Proceeds not theretofore subject to an Offer to Purchase pursuant to this
Section 4.11 totals at least $10 million, the Company must commence, not later
than the fifteenth Business Day of such month, and consummate an Offer to
Purchase from the Holders on a pro rata basis an aggregate principal amount of
Notes equal to the Excess Proceeds on such date, at a purchase price equal to
100% of the principal amount of the Notes, plus, in each case, accrued interest
(if any) to the Payment Date. In the event that more than 98% of the outstanding
principal amount of the Notes are tendered pursuant to such Offer to Purchase,
the balance of the Notes will be redeemable, at the Company's option, in whole
or in part, at any time or from time to time thereafter, at a Redemption Price
equal to the price specified in such Offer to Purchase plus accrued and unpaid
interest, if any, to the Redemption Date (subject to the right of Holders of
record on the relevant Regular Record Date that is on or prior to the Redemption
Date to receive interest due on an Interest Payment Date).

          SECTION 4.12. Repurchase of Notes upon a Change of Control. The
Company must commence, within 30 days of the occurrence of a Change of Control,
and consummate an Offer to Purchase for all Notes then outstanding, at a
purchase price equal to 101% of the principal amount thereof, plus accrued
interest (if any) to the Payment Date. In the event that more than 98% of the
outstanding principal amount of the Notes are tendered pursuant to such Offer to
Purchase, the balance of the Notes will be redeemable, at the Company's option,
in whole or in part, at any time or from time to time thereafter, at a
Redemption Price equal to the price specified in such Offer to Purchase plus
accrued and unpaid interest, if any, to the Redemption Date (subject to the
right of Holders of record on the relevant Regular Record Date that is on or
prior to the Redemption Date to receive interest due on an Interest Payment
Date).

          SECTION 4.13. Existence. Subject to Articles Four and Five of this
Indenture, the Company will do or cause to be done all things necessary to
preserve and keep in full force and effect its existence and the existence of
each of its Restricted Subsidiaries in accordance with the respective
organizational documents of the Company and each such Restricted Subsidiary and
the rights (whether pursuant to charter, partnership certificate, agreement,
statute or otherwise), licenses and franchises of the Company and each such
Restricted Subsidiary; provided that the Company shall not be required to
preserve any such right, license or franchise, or the existence of any
Restricted Subsidiary, if the maintenance or preservation thereof is no longer
desirable in the conduct of the business of the Company and its Restricted
Subsidiaries taken as a whole.

          SECTION 4.14. Payment of Taxes and Other Claims. The Company will pay
or discharge and shall cause each of its Restricted Subsidiaries to pay or
discharge, or cause to be paid or discharged, before the same shall become
delinquent (i) all material taxes, assessments and governmental charges levied
or imposed upon (a) the Company or any such Restricted Subsidiary, (b) the
income or profits of any such Subsidiary which is a corporation or (c) the
property of the Company or any such Restricted Subsidiary and (ii) all material
lawful claims for labor, materials and supplies that, if unpaid, might by law
become a lien upon the property of the Company or any such Restricted
Subsidiary; provided that the Company shall not be required to pay or discharge,
or cause to be paid or discharged, any such tax, assessment, charge or claim the
amount, applicability or validity of which is being contested in good faith by
appropriate proceedings and for which adequate reserves have been established.

          SECTION 4.15. Maintenance of Properties and Insurance. The Company
will cause all properties used or useful in the conduct of its business or the
business of any Restricted Subsidiary and material to the Company and its
Restricted Subsidiaries taken as a whole, to be

<PAGE>

maintained and kept in good condition, repair and working order and supplied
with all necessary equipment and will cause to be made all necessary repairs,
renewals, replacements, betterments and improvements thereof, all as in the
judgment of the Company may be necessary so that the business carried on in
connection therewith may be properly and advantageously conducted at all times;
provided that nothing in this Section 4.15 shall prevent the Company or any such
Restricted Subsidiary from discontinuing the use, operation or maintenance of
any of such properties or disposing of any of them, if such discontinuance or
disposal is, in the judgment of the Company or of such Restricted Subsidiary
having managerial responsibility for any such property, desirable in the conduct
of the business of the Company or such Restricted Subsidiary.

          The Company will provide or cause to be provided, for itself and its
Restricted Subsidiaries, insurance (including appropriate self-insurance)
against loss or damage of the kinds customarily insured against by corporations
similarly situated and owning like properties, with reputable insurers or with
the government of the United States of America, or an agency or instrumentality
thereof, in such amounts, with such deductibles and by such methods as the
Company in good faith shall determine to be reasonable and appropriate in the
circumstances.

          SECTION 4.16. Compliance Certificates. (a) Each of the Company and
each Guarantor shall deliver to the Trustee, within 90 days after the end of the
Company's and each Guarantor's fiscal year, an Officers' Certificate signed by
the Chief Financial Officer of the Company or the Guarantor, as applicable, and
another senior executive Officer of the Company or the Guarantor, as applicable,
stating whether or not the signers know of any Default or Event of Default that
occurred during such fiscal year. If any of the signers of the Officers'
Certificate have knowledge of such a Default or Event of Default, the
certificate shall describe any such Default or Event of Default and its status.

          (b) The Company shall, so long as any of the Notes are outstanding,
deliver to the Trustee, forthwith upon any Officer becoming aware of any Default
or Event of Default, an Officers' Certificate specifying such Default or Event
of Default and what action the Company is taking or proposes to take with
respect thereto.

          SECTION 4.17. Commission Reports and Reports to Holders. The Company
shall file with the Commission the annual, quarterly and other reports and other
information required by Section 13(a) or 15(d) of the Exchange Act, regardless
of whether such sections of the Exchange Act are applicable to the Company, and
shall mail or cause to be mailed copies of such reports to Holders and the
Trustee within 15 days after the date it would have been required to file such
reports with the Commission had it been subject to such sections; provided,
however, that the copies of such reports mailed to Holders may omit exhibits,
which the Company will supply to any Holder at such Holder's request. The
Company also shall comply with the other provisions of TIA Section 314(a).

          SECTION 4.18. Waiver of Stay, Extension or Usury Laws. The Company and
each of the Guarantors covenant (to the extent that it may lawfully do so) that
it will not at any time insist upon, or plead, or in any manner whatsoever claim
or take the benefit or advantage of, any stay or extension law or any usury law
or other law that would prohibit or forgive the Company or any Guarantor from
paying all or any portion of the principal of, premium, if any, or interest on
the Notes as contemplated herein, wherever enacted, now or at any time hereafter
in force, or that may affect the covenants or the performance of this Indenture;
and (to the extent that it may lawfully do so) the Company and each of the
Guarantors hereby expressly waive all benefit or advantage of any such law and
covenants that it will not hinder, delay or impede the execution of any power
herein granted to the Trustee, but will suffer and permit the execution of every
such power as though no such law had been enacted.

<PAGE>

                                  ARTICLE FIVE
                              SUCCESSOR CORPORATION

          SECTION 5.01. When Company May Merge, Etc. Neither the Company nor any
Guarantor will consolidate with, merge with or into, or sell, convey, transfer,
lease or otherwise dispose of all or substantially all of its property and
assets (as an entirety or substantially an entirety in one transaction or a
series of related transactions) to, any Person or permit any Person to merge
with or into the Company or any Guarantor unless:

          (i) the Company or the Guarantor, as the case may be, shall be the
     continuing Person, or the Person (if other than the Company or the
     Guarantor) formed by such consolidation or into which the Company or the
     Guarantor, as the case may be, is merged or that acquired or leased such
     property and assets of the Company or the Guarantor, as the case may be,
     shall be a corporation organized and validly existing under the laws of the
     United States of America or any jurisdiction thereof and shall expressly
     assume, by a supplemental indenture, executed and delivered to the Trustee,
     all of the obligations of the Company or the Guarantor, as the case may be,
     on all of the Notes or the Note Guarantees, as the case may be, and under
     the Indenture;

          (ii) immediately after giving effect to such transaction, no Default
     or Event of Default shall have occurred and be continuing;

          (iii) immediately after giving effect to such transaction on a pro
     forma basis, the Company or any Guarantor, as the case may be, or any
     Person becoming the successor obligor of the Notes or the Note Guarantees,
     as the case may be, shall have a Consolidated Net Worth (a "Pro Forma
     Consolidated Net Worth") which is equal to or greater than the Consolidated
     Net Worth of the Company or the Guarantor, as the case may be, immediately
     prior to such transaction (the "Base Consolidated Net Worth"), or if the
     Pro Forma Consolidated Net Worth is less than the Base Consolidated Net
     Worth, the amount by which the Pro Forma Consolidated Net Worth is less
     than the Base Consolidated Net Worth shall, if considered as a Restricted
     Payment, be permitted to be paid at the time under Section 4.04;

          (iv) immediately after giving effect to such transaction on a pro
     forma basis the Company or any Guarantor, as the case may be, or any Person
     becoming the successor obligor of the Notes or the Note Guarantees, as the
     case may be, could Incur at least $1.00 of Indebtedness under the first
     paragraph of Section 4.03; provided that this clause (iv) shall not apply
     to a consolidation or merger with or into a Wholly Owned Restricted
     Subsidiary with a positive net worth; and provided further that, in
     connection with any such merger or consolidation, no consideration (other
     than Capital Stock (other than Disqualified Stock) in the surviving Person,
     the Company or any Guarantor) shall be issued or distributed to the
     stockholders of the Company or the Guarantor; and

          (v) the Company delivers to the Trustee an Officers' Certificate
     (attaching the arithmetic computations to demonstrate compliance with
     clauses (iii) and (iv)) and Opinion of Counsel, in each case stating that
     such consolidation, merger or transfer and such supplemental indenture
     complies with this provision and that all conditions precedent provided for
     herein relating to such transaction have been complied with;

provided, however, that clauses (iii) and (iv) above do not apply if, in the
good faith determination of the Board of Directors of the Company, whose
determination shall be evidenced by a Board Resolution, the principal purpose of
such transaction is to change the state of incorporation of the

<PAGE>

Company or any Guarantor; and provided further that any such transaction shall
not have as one of its purposes the evasion of the foregoing limitations.

          SECTION 5.02. Successor Substituted. Upon any consolidation or merger,
or any sale, conveyance, transfer or other disposition of all or substantially
all of the property and assets of the Company or any Guarantor in accordance
with Section 5.01 of this Indenture, the successor Person formed by such
consolidation or into which the Company or any Guarantor is merged or to which
such sale, conveyance, transfer or other disposition is made shall succeed to,
and be substituted for, and may exercise every right and power of, the Company
or any Guarantor, as the case may be, under this Indenture with the same effect
as if such successor Person had been named as the Company or any Guarantor, as
the case may be, herein; provided, however, that in the case of a lease, the
Company or any Guarantor, as the case may be, shall not be released from the
obligation to pay the principal of and interest on the Notes.

                                   ARTICLE SIX
                              DEFAULT AND REMEDIES

          SECTION 6.01. Events of Default. An "Event of Default" shall occur
with respect to the Notes if:

          (a) the Company or any Guarantor, as the case may be, defaults in the
     payment of principal of (or premium, if any, on) any Note when the same
     becomes due and payable at Stated Maturity, upon acceleration, redemption
     or otherwise;

          (b) the Company or any Guarantor, as the case may be, defaults in the
     payment of interest on any Note when the same becomes due and payable, and
     such default continues for a period of 30 days;

          (c) the Company or any Guarantor, as the case may be, defaults in the
     performance or breaches the provisions of Article Five or fails to make or
     consummate an Offer to Purchase in accordance with Section 4.11 or Section
     4.12 of this Indenture;

          (d) the Company or any Guarantor, as the case may be, defaults in the
     performance of or breaches any other covenant or agreement of the Company
     or a Guarantor in this Indenture or under the Notes (other than a default
     specified in clause (a), (b) or (c) above) and such default or breach
     continues for a period of 30 consecutive days after written notice by the
     Trustee or the Holders of 25% or more in aggregate principal amount of the
     Notes;

          (e) there occurs with respect to any issue or issues of Indebtedness
     of the Company, any Guarantor or any Significant Subsidiary having an
     outstanding principal amount of $10 million or more in the aggregate for
     all such issues of all such Persons, whether such Indebtedness now exists
     or shall hereafter be created, (I) an event of default that has caused the
     holder thereof to declare such Indebtedness to be due and payable prior to
     its Stated Maturity and such Indebtedness has not been discharged in full
     or such acceleration has not been rescinded or annulled within 30 days of
     such acceleration and/or (II) the failure to make a principal payment at
     the final (but not any interim) fixed maturity and such defaulted payment
     shall not have been made, waived or extended within 30 days of such payment
     default;

<PAGE>

          (f) any final judgment or order (not covered by insurance) for the
     payment of money in excess of $10 million in the aggregate for all such
     final judgments or orders against all such Persons (treating any
     deductibles, self-insurance or retention as not so covered) shall be
     rendered against the Company, any Guarantor or any Significant Subsidiary
     and shall not be paid or discharged, and there shall be any period of 30
     consecutive days during which a stay of enforcement of such final judgment
     or order, by reason of a pending appeal or otherwise, shall not be in
     effect;

          (g) a court having jurisdiction in the premises enters a decree or
     order for (A) relief in respect of the Company or any Significant
     Subsidiary in an involuntary case under any applicable bankruptcy,
     insolvency or other similar law now or hereafter in effect, (B) appointment
     of a receiver, liquidator, assignee, custodian, trustee, sequestrator or
     similar official of the Company or any Significant Subsidiary or for all or
     substantially all of the property and assets of the Company or any
     Significant Subsidiary or (C) the winding up or liquidation of the affairs
     of the Company or any Significant Subsidiary and, in each case, such decree
     or order shall remain unstayed and in effect for a period of 30 consecutive
     days;

          (h) the Company or any Significant Subsidiary (A) commences a
     voluntary case under any applicable bankruptcy, insolvency or other similar
     law now or hereafter in effect, or consents to the entry of an order for
     relief in an involuntary case under any such law, (B) consents to the
     appointment of or taking possession by a receiver, liquidator, assignee,
     custodian, trustee, sequestrator or similar official of the Company or any
     Significant Subsidiary or for all or substantially all of the property and
     assets of the Company or any Significant Subsidiary or (C) effects any
     general assignment for the benefit of creditors; or

          (i) any Note Guarantee ceases to be in full force and effect (except
     pursuant to its terms) or is declared null and void or any Guarantor denies
     that it has any further liability under any Note Guarantee, or gives notice
     to such effect.

          SECTION 6.02. Acceleration. If an Event of Default (other than an
Event of Default specified in clause (g) or (h) of Section 6.01 that occurs with
respect to the Company or any Guarantor) occurs and is continuing under this
Indenture, the Trustee or the Holders of at least 25% in aggregate principal
amount of the Notes, then outstanding, by written notice to the Company (and to
the Trustee if such notice is given by the Holders), may, and the Trustee at the
request of such Holders shall, declare the principal of, premium, if any, and
accrued interest on the Notes to be immediately due and payable. Upon a
declaration of acceleration, such principal of, premium, if any, and accrued
interest shall be immediately due and payable. In the event of a declaration of
acceleration because an Event of Default set forth in clause (e) of Section 6.01
has occurred and is continuing, such declaration of acceleration shall be
automatically rescinded and annulled if the event of default triggering such
Event of Default pursuant to clause (e) shall be remedied or cured by the
Company, any Guarantor or the relevant Significant Subsidiary or waived by the
holders of the relevant Indebtedness within 60 days after the declaration of
acceleration with respect thereto. If an Event of Default specified in clause
(g) or (h) of Section 6.01 occurs with respect to the Company or any Significant
Subsidiary, the principal of, premium, if any, and accrued interest on the Notes
then outstanding shall ipso facto become and be immediately due and payable
without any declaration or other act on the part of the Trustee or any Holder.

          At any time after such a declaration of acceleration, but before a
judgment or decree for the payment of the money due has been obtained by the
Trustee, the Holders of at least a majority in principal amount of the
outstanding Notes by written notice to the Company and to the Trustee, may waive
all past defaults and rescind and annul a declaration of acceleration and its
consequences if (i) all existing Events of Default, other than the nonpayment of
the principal of, premium, if any,

<PAGE>

and interest on the Notes that have become due solely by such declaration of
acceleration, have been cured or waived and (ii) the rescission would not
conflict with any judgment or decree of a court of competent jurisdiction.

          SECTION 6.03. Other Remedies. If an Event of Default occurs and is
continuing, the Trustee may pursue any available remedy by proceeding at law or
in equity to collect the payment of principal of, premium, if any, or interest
on the Notes or to enforce the performance of any provision of the Notes or this
Indenture.

          The Trustee may maintain a proceeding even if it does not possess any
of the Notes or does not produce any of them in the proceeding.

          SECTION 6.04. Waiver of Past Defaults. Subject to Sections 6.02, 6.07
and 9.02, the Holders of at least a majority in aggregate principal amount of
the outstanding Notes, by notice to the Trustee, may waive an existing Default
or Event of Default and its consequences, except a Default in the payment of
principal of, premium, if any, or interest on any Note as specified in clause
(a) or (b) of Section 6.01 (including in connection with an Offer to Purchase)
or in respect of a covenant or provision of this Indenture which cannot be
modified or amended without the consent of the Holder of each outstanding Note
affected. Upon any such waiver, such Default shall cease to exist, and any Event
of Default arising therefrom shall be deemed to have been cured, for every
purpose of this Indenture; but no such waiver shall extend to any subsequent or
other Default or Event of Default or impair any right consequent thereto.

          SECTION 6.05. Control by Majority. The Holders of at least a majority
in aggregate principal amount of the outstanding Notes, by notice to the
Trustee, may direct the time, method and place of conducting any proceeding for
exercising any remedy available to the Trustee or exercising any trust or power
conferred on the Trustee; provided that the Trustee may refuse to follow any
direction that conflicts with law or this Indenture, that may involve the
Trustee in personal liability, or that the Trustee determines in good faith may
be unduly prejudicial to the rights of Holders not joining in the giving of such
direction; and provided further that the Trustee may take any other action it
deems proper that is not inconsistent with any directions received from Holders
of Notes pursuant to this Section 6.05.

          SECTION 6.06. Limitation on Suits. A Holder may not institute any
proceeding, judicial or otherwise, with respect to this Indenture or the Notes,
or for the appointment of a receiver or trustee, or pursue any other remedy
hereunder, unless:

          (i) such Holder has previously given the Trustee written notice of a
     continuing Event of Default;

          (ii) the Holders of at least 25% in aggregate principal amount of
     outstanding Notes shall have made a written request to the Trustee to
     institute proceedings in respect of such Event of Default in its own name
     as Trustee hereunder;

          (iii) such Holder or Holders have offered to the Trustee indemnity
     satisfactory to the Trustee against any costs, liability or expense
     incurred in compliance with such request;

          (iv) the Trustee for 60 days after its receipt of such notice, request
     and offer of indemnity has failed to institute any such proceeding; and

<PAGE>

          (v) during such 60-day period, the Holders of a majority in aggregate
     principal amount of the outstanding Notes have not given the Trustee a
     direction that is inconsistent with such written request.

          For purposes of Section 6.05 of this Indenture and this Section 6.06,
the Trustee shall comply with TIA Section 316(a) in making any determination of
whether the Holders of the required aggregate principal amount of outstanding
Notes have concurred in any request or direction of the Trustee to pursue any
remedy available to the Trustee or the Holders with respect to this Indenture or
the Notes or otherwise under the law.

          A Holder may not use this Indenture to prejudice the rights of another
Holder or to obtain a preference or priority over such other Holder.

          SECTION 6.07. Rights of Holders to Receive Payment. Notwithstanding
any other provision of this Indenture, the right of any Holder of a Note to
receive payment of the principal amount of, premium, if any, or interest on such
Holder's Note on or after the respective due dates expressed on such Note
(including in a notice with respect to an Offer to Purchase), or to bring suit
for the enforcement of any such payment on or after such respective dates, shall
not be impaired or affected without the consent of such Holder.

          SECTION 6.08. Collection Suit by Trustee. If an Event of Default in
payment of principal, premium or interest specified in clause (a) or (b) of
Section 6.01 occurs and is continuing, the Trustee may recover judgment in its
own name and as trustee of an express trust against the Company or any other
obligor of the Notes for the whole amount of principal, premium, if any, and
accrued interest remaining unpaid, together with interest on overdue principal,
premium, if any, and, to the extent that payment of such interest is lawful,
interest on overdue installments of interest, in each case at the rate specified
in the Notes, and such further amount as shall be sufficient to cover the costs
and expenses of collection, including the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel.

          SECTION 6.09. Trustee May File Proofs of Claim. The Trustee may file
such proofs of claim and other papers or documents as may be necessary or
advisable in order to have the claims of the Trustee (including any claim for
the reasonable compensation, expenses, disbursements and advances of the
Trustee, its agents and counsel, and any other amounts due the Trustee under
Section 7.06) and the Holders allowed in any judicial proceedings relative to
the Company (or any other obligor of the Notes), its creditors or its property
and shall be entitled and empowered to collect and receive any monies,
securities or other property payable or deliverable upon conversion or exchange
of the Notes or upon any such claims and to distribute the same, and any
custodian, receiver, assignee, trustee, liquidator, sequestrator or other
similar official in any such judicial proceeding is hereby authorized by each
Holder to make such payments to the Trustee and, in the event that the Trustee
shall consent to the making of such payments directly to the Holders, to pay to
the Trustee any amount due to it for the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agent and counsel, and any other
amounts due the Trustee under Section 7.06. Nothing herein contained shall be
deemed to empower the Trustee to authorize or consent to, or accept or adopt on
behalf of any Holder, any plan of reorganization, arrangement, adjustment or
composition affecting the Notes or the rights of any Holder thereof, or to
authorize the Trustee to vote in respect of the claim of any Holder in any such
proceeding.

          SECTION 6.10. Priorities. If the Trustee collects any money pursuant
to this Article Six, it shall pay out the money in the following order:

<PAGE>

          First: to the Trustee for amounts due under Section 7.06, including
     payment of all compensation, expense and liabilities incurred, and all
     advances made, by the Trustee and the costs and expenses of collection;

          Second: to Holders for amounts then due and unpaid for principal
     amount of, premium, if any, and interest on the Notes in respect of which
     or for the benefit of which such money has been collected, ratably, without
     preference or priority of any kind, according to the amounts due and
     payable on such Notes for principal, premium, if any, and interest,
     respectively; and

          Third: to the Company or any other obligors of the Notes, as their
     interests may appear, or as a court of competent jurisdiction may direct.

          The Trustee, upon prior written notice to the Company, may fix a
record date and payment date for any payment to Holders pursuant to this Section
6.10.

          SECTION 6.11. Undertaking for Costs. In any suit for the enforcement
of any right or remedy under this Indenture or in any suit against the Trustee
for any action taken or omitted by it as Trustee, a court in its discretion may
require the filing by any party litigant in the suit of an undertaking to pay
the costs of the suit, and the court in its discretion may assess reasonable
costs, including reasonable attorneys' fees, against any party litigant in the
suit having due regard to the merits and good faith of the claims or defenses
made by the party litigant. This Section 6.11 does not apply to a suit by the
Trustee, a suit by a Holder pursuant to Section 6.07 of this Indenture, or a
suit by Holders of more than 10% in principal amount of the outstanding Notes.

          SECTION 6.12. Restoration of Rights and Remedies. If the Trustee or
any Holder has instituted any proceeding to enforce any right or remedy under
this Indenture and such proceeding has been discontinued or abandoned for any
reason, or has been determined adversely to the Trustee or to such Holder, then,
and in every such case, subject to any determination in such proceeding, the
Company, the Trustee and the Holders shall be restored severally and
respectively to their former positions hereunder and thereafter all rights and
remedies of the Company, Trustee and the Holders shall continue as though no
such proceeding had been instituted.

          SECTION 6.13. Rights and Remedies Cumulative. Except as otherwise
provided with respect to the replacement or payment of mutilated, destroyed,
lost or wrongfully taken Notes in Section 2.09, no right or remedy herein
conferred upon or reserved to the Trustee or to the Holders is intended to be
exclusive of any other right or remedy, and every right and remedy shall, to the
extent permitted by law, be cumulative and in addition to every other right and
remedy given hereunder or now or hereafter existing at law or in equity or
otherwise. The assertion or employment of any right or remedy hereunder, or
otherwise, shall not prevent the concurrent assertion or employment of any other
appropriate right or remedy.

          SECTION 6.14. Delay or Omission Not Waiver. No delay or omission of
the Trustee or of any Holder to exercise any right or remedy accruing upon any
Event of Default shall impair any such right or remedy or constitute a waiver of
any such Event of Default or an acquiescence therein. Every right and remedy
given by this Article Six or by law to the Trustee or to the Holders may be
exercised from time to time, and as often as may be deemed expedient, by the
Trustee or by the Holders, as the case may be.

<PAGE>

                                  ARTICLE SEVEN
                                     TRUSTEE

          SECTION 7.01. Rights and Duties of Trustee. (i) Except during the
continuance of an Event of Default,

          (a) the Trustee undertakes to perform such duties and only such duties
     as are specifically set forth in this Indenture, and no implied covenants
     or obligations shall be read into this Indenture against the Trustee; and

          (b) in the absence of bad faith on its part, the Trustee may
     conclusively rely, as to the truth and correctness of the statements and
     certificates or opinions furnished to it and conforming to the requirements
     of this Indenture; but in the case of any such certificates or opinions
     which by any provision hereof are specifically required to be furnished to
     the Trustee, the Trustee shall be under a duty to examine the same to
     determine whether or not they conform to the requirements of this
     Indenture.

          (ii) In case an Event of Default has occurred and is continuing, the
Trustee shall exercise such of the rights and powers vested in it by this
Indenture, and use the same degree of care and skill in its exercise, as a
prudent person would exercise or use under the circumstances in the conduct of
such person's own affairs.

          (iii) No provision of this Indenture shall be construed to relieve the
Trustee from liability for its own negligent action, its own negligent failure
to act, or its own willful misconduct, except that:

          (a) this Subsection shall not be construed to limit the effect of
     Subsection (i) of this Section;

          (b) the Trustee shall not be liable for any error of judgment made in
     good faith by a Responsible Officer, unless it shall be proved that the
     Trustee was negligent in ascertaining the pertinent facts; and

          (c) the Trustee shall not be liable with respect to any action taken
     or omitted to be taken by it in good faith in accordance with the direction
     of the Holders of a majority in principal amount of the outstanding Notes,
     relating to the time, method and place of conducting any proceeding for
     exercising any remedy available to the Trustee, or exercising any trust or
     power conferred upon the Trustee, under this Indenture with respect to the
     Notes.

          (iv) Subject to TIA Sections 315(a) through (d):

          (a) the Trustee may rely upon any document believed by it to be
     genuine and to have been signed or presented by the proper person. The
     Trustee need not investigate any fact or matter stated in the document;

          (b) before the Trustee acts or refrains from acting, it may require an
     Officers' Certificate or an Opinion of Counsel, which shall conform to
     Section 11.04. The Trustee shall not be liable for any action it takes or
     omits to take in good faith in reliance on such certificate or opinion;

          (c) the Trustee shall be under no obligation to exercise any of the
     rights or powers vested in it by this Indenture at the request or direction
     of any of the Holders, unless such

<PAGE>

     Holders shall have offered to the Trustee reasonable security or indemnity
     against the costs, expenses and liabilities that might be incurred by it in
     compliance with such request or direction;

          (d) the Trustee shall not be liable for any action it takes or omits
     to take in good faith that it believes to be authorized or within its
     rights or powers; provided that the Trustee's conduct does not constitute
     negligence or bad faith;

          (e) no provision of this Indenture shall require the Trustee to expend
     or risk its own funds or otherwise incur any financial liability in the
     performance of any of its duties hereunder, or in the exercise of any of
     its rights or powers, if it shall have reasonable grounds for believing
     that repayment of such funds or adequate indemnity against such risk or
     liability is not reasonably assured to it;

          (f) whenever in the administration of this Indenture the Trustee shall
     deem it desirable that a matter be proved or established prior to taking,
     suffering or omitting any action hereunder, the Trustee (unless other
     evidence be herein specifically prescribed), may, in the absence of bad
     faith on its part, rely upon an Officers' Certificate;

          (g) the Trustee may consult with counsel and the advice of such
     counsel or any opinion of counsel shall be full and complete authorization
     and protection in respect of any action taken, suffered or omitted by it
     hereunder in good faith and in reliance thereon;

          (h) the Trustee shall not be bound to make any investigation into the
     facts or matters stated in any resolution, certificate, statement,
     instrument, opinion, report, notice, request, direction, consent, order,
     bond, debenture, note, other evidence of indebtedness or other paper or
     document, but the Trustee, in its discretion, may make such further inquiry
     or investigation into such facts or matters as it may see fit, and, if the
     Trustee shall determine to make such further inquiry or investigation, it
     shall be entitled to examine the books, records and premises of the Company
     or any Guarantor, personally or by agent or attorney;

          (i) the Trustee may execute any of the trusts or powers hereunder
     either directly or by or through agents or attorneys and the Trustee shall
     not be responsible for any misconduct or negligence on the part of any
     agent or attorney appointed with due care by it hereunder;

          (j) the Trustee may conclusively rely as to the identity and addresses
     of Holders and other matters contained therein on the register of the Notes
     maintained by the Registrar pursuant to Section 2.04 hereof and shall not
     be affected by notice to the contrary; and

          (k) unless otherwise specifically provided in this Indenture, any
     demand, request, direction or notice from the Company shall be sufficient
     if signed by an Officer of the Company.

          SECTION 7.02. Individual Rights of Trustee. The Trustee, in its
individual or any other capacity, may become the owner or pledgee of Notes and
may otherwise deal with the Company, the Guarantors or their Affiliates with the
same rights it would have if it were not the Trustee. Any Agent may do the same
with like rights. However, the Trustee must comply with Sections 7.09 and 7.11.

          SECTION 7.03. Trustee's Disclaimer. The Trustee (i) shall not be
responsible for and makes no representation as to the validity or adequacy of
this Indenture or the Notes, (ii) shall

<PAGE>

not be accountable for the Company's use of the proceeds from the Notes (iii)
shall not be responsible for the use or application of any money received by any
Paying Agent other than the Trustee, and (iv) shall not be responsible for any
statement in the Notes other than its certificate of authentication.

          SECTION 7.04. Notice of Default. If any Default or any Event of
Default occurs and is continuing and if such Default or Event of Default is
known to a Responsible Officer of the Trustee, the Trustee shall mail to each
Holder in the manner and to the extent provided in TIA Section 313(c) notice of
the Default or Event of Default within 45 days after it occurs, unless such
Default or Event of Default has been cured or waived; provided, however, that,
except in the case of a default in the payment of the principal of, premium, if
any, or interest on any Note, the Trustee shall be protected in withholding such
notice if and so long as the board of directors, the executive committee or a
trust committee of directors and/or Responsible Officers of the Trustee in good
faith determine that the withholding of such notice is in the interest of the
Holders.

          The Trustee shall not be deemed to have knowledge of any Default or
Event of Default except (i) a default described in Section 6.01(a) or (b) so
long as the Trustee is the Paying Agent or (ii) any Default or Event of Default
of which the Trustee shall have received written notification or a Responsible
Officer charged with the administration of this Indenture shall have obtained
actual knowledge, and such notification shall not be deemed to include receipt
of information obtained in any report or other reports and documents furnished
under Section 4.16 of this Indenture which reports and documents the Trustee
shall have no duty to examine.

          SECTION 7.05. Reports by Trustee to Holders. Within 60 days after each
May 15, beginning with May 15, 1998, the Trustee shall mail to each Holder as
provided in TIA Section 313(c) a brief report dated as of such May 15, if
required by TIA Section 313(a).

          A copy of each report at the time of its mailing to the Holders of
Notes shall be mailed to the Company and filed with the Commission and each
stock exchange on which the Notes are listed in accordance with TIA Section
313(d). The Company shall promptly notify the Trustee when the Notes are listed
on any stock exchange or of any delisting thereof.

          SECTION 7.06. Compensation and Indemnity. The Company and the
Guarantors, jointly and severally, shall pay to the Trustee such compensation as
shall be agreed upon in writing for its services hereunder. The compensation of
the Trustee shall not be limited by any law on compensation of a trustee of an
express trust. The Company and the Guarantors, jointly and severally, shall
reimburse the Trustee promptly upon request for all reasonable disbursements,
expenses and advances incurred or made by it in addition to compensation for its
services. Such expenses shall include the reasonable compensation, disbursements
and expenses of the Trustee's agents and counsel.

          The Company and the Guarantors, jointly and severally, shall indemnify
the Trustee for, and hold it harmless against, any loss or liability or expense
incurred by it without negligence or bad faith on its part in connection with
the acceptance or administration of this Indenture and its duties under this
Indenture and the Notes, including the costs and expenses of defending itself
against any claim or liability and of complying with any process served upon it
or any of its officers in connection with the exercise or performance of any of
its powers or duties under this Indenture and the Notes. The Trustee shall
notify the Company promptly of any claim asserted against the Trustee for which
it may seek indemnity. The Company shall defend the claim and the Trustee shall
cooperate in the defense. The Trustee may have separate counsel and the Company
shall pay reasonable fees and expenses of such counsel. The Company need not pay
for any settlements made without its consent; provided that such consent shall
not be unreasonably withheld. The Company

<PAGE>

need not reimburse any expense or indemnity against any loss or liability
incurred by the Trustee through negligence or bad faith.

          The Trustee shall have a claim prior to the Notes on all money or
property held or collected by the Trustee, in its capacity as Trustee, for any
amount owing it pursuant to this Section 7.06, except money or property held in
trust to pay principal of, premium, if any, and interest on particular Notes.

          If the Trustee incurs expenses or renders services after the
occurrence of an Event of Default specified in clause (g) or (h) of Section
6.01, the expenses and the compensation for the services (including the
reasonable fees and expenses of its agents and counsel) will be intended to
constitute expenses of administration under Title 11 of the United States
Bankruptcy Code or any applicable federal or state law for the relief of
debtors.

          To the extent that the payment of any such compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel, and any other
amounts due the Trustee under this Section 7.06 out of the estate in any such
proceeding, shall be denied for any reason, other than solely because of the
misconduct of the Trustee or its Agents, payment of the same shall be secured by
a Lien on, and shall be paid out of, any and all distributions, dividends,
money, securities and other properties that the Holders may be entitled to
receive in such proceeding whether in liquidation or under any plan of
reorganization or arrangement or otherwise.

          The provisions of this Section 7.06 shall survive the termination of
this Indenture.

          The Trustee shall comply with the provisions of TIA Section 313(b)(2)
to the extent applicable.

          SECTION 7.07. Replacement of Trustee. A resignation or removal of the
Trustee and appointment of a successor Trustee shall become effective only upon
the successor Trustee's acceptance of appointment as provided in this Section
7.07.

          The Trustee may resign by so notifying the Company in writing at least
30 days prior to the date of the proposed resignation. The Holders of a majority
in principal amount of the outstanding Notes may remove the Trustee by so
notifying the Trustee in writing and may appoint a successor Trustee with the
consent of the Company. The Company may remove the Trustee if:

          (i) the Trustee fails to comply with Section 7.09;

          (ii) the Trustee is adjudged a bankrupt or an insolvent;

          (iii) a receiver or other public officer takes charge of the Trustee
     or its property; or

          (iv) the Trustee becomes incapable of acting.

          If the Trustee resigns or is removed, or if a vacancy exists in the
office of Trustee for any reason, the Company shall promptly appoint a successor
Trustee. Within one year after the successor Trustee takes office, the Holders
of a majority in aggregate principal amount of the outstanding Notes may appoint
a successor Trustee to replace the successor Trustee appointed by the Company.
If the successor Trustee does not take office within 60 days after the retiring
Trustee resigns or is removed, the retiring Trustee, the Company or the Holders
of a majority in principal

<PAGE>

amount of the outstanding Notes may petition any court of competent jurisdiction
for the appointment of a successor Trustee.

          A successor Trustee shall deliver a written acceptance of its
appointment to the retiring Trustee and to the Company. Immediately after the
delivery of such written acceptance, subject to the lien provided in Section
7.06, (i) the retiring Trustee shall transfer all property held by it as Trustee
to the successor Trustee, (ii) the resignation or removal of the retiring
Trustee shall become effective and (iii) the successor Trustee shall have all
the rights, powers and duties of the Trustee under this Indenture. A successor
Trustee shall mail notice of its succession to each Holder.

          If the Trustee fails to comply with Section 7.09, any Holder who
satisfies the requirements of TIA Section 310(b) may petition any court of
competent jurisdiction for the removal of the Trustee and the appointment of a
successor Trustee. If at any time the Trustee shall cease to be eligible in
accordance with the provisions of this Section, the Trustee shall resign
immediately in the manner and with the effect provided in this Section.

          Notwithstanding replacement of the Trustee pursuant to this Section
7.07, the Company's obligation under Section 7.06 shall continue for the benefit
of the retiring Trustee.

          SECTION 7.08. Successor Trustee by Merger, Etc. If the Trustee
consolidates with, merges or converts into, or transfers all or substantially
all of its corporate trust business to, another corporation or national banking
association, the resulting, surviving or transferee corporation or national
banking association without any further act shall be the successor Trustee with
the same effect as if the successor Trustee had been named as the Trustee
herein.

          SECTION 7.09. Eligibility; Disqualification. Any Trustee serving
hereunder shall be a bank or trust company, within or without the state, which
is authorized by law to perform all of the duties imposed upon it hereby and
which either (i) has a reported capital and surplus aggregating at least $25
million or (ii) is a wholly owned subsidiary of a bank, a trust company or a
bank holding company having a reported capital and surplus aggregating at least
$25 million, and shall at all times satisfy the requirements of TIA Section
310(a)(i). The Trustee shall comply with TIA Section 310(b); provided, however,
that there shall be excluded from the operation of TIA Section 310(b)(1) any
indenture or indentures under which other securities or certificates of interest
or participation in other securities of the Company are outstanding if the
requirements for such exclusion set forth in TIA Section 310(b)(1) are met.

          SECTION 7.10. Money Held in Trust. The Trustee shall not be liable for
interest on any money received by it except as the Trustee may agree with the
Company. Money held in trust by the Trustee need not be segregated from other
funds except to the extent required by law and except for money held in trust
under Article Eight of this Indenture.

          SECTION 7.11. Preferential Collection of Claims Against Company. The
Trustee shall comply with TIA Section 311(a), excluding any creditor
relationship listed in TIA Section 311(b). A Trustee who has resigned or been
removed shall be subject to TIA Section 311(a) to the extent indicated.

<PAGE>

                                  ARTICLE EIGHT
                             DISCHARGE OF INDENTURE

          SECTION 8.01. Termination of Company's Obligations. Except as
otherwise provided in this Section 8.01, the Company and the Guarantors may
terminate their obligations under the Notes and this Indenture if:

          (i) all Notes previously authenticated and delivered (other than
     destroyed, lost or stolen Notes that have been replaced or Notes that are
     paid pursuant to Section 4.01 or Notes for whose payment money or
     securities have theretofore been held in trust and thereafter repaid to the
     Company, as provided in Section 8.05) have been delivered to the Trustee
     for cancellation and the Company has paid all sums payable by it hereunder;
     or

          (ii) (A) the Notes have become due and payable, mature within one year
     or all of them are to be called for redemption within one year under
     arrangements satisfactory to the Trustee for giving the notice of
     redemption, (B) the Company or any Guarantor irrevocably deposits in trust
     with the Trustee during such one-year period, under the terms of an
     irrevocable trust agreement in form and substance satisfactory to the
     Trustee, as trust funds solely for the benefit of the Holders for that
     purpose, money or U.S. Government Obligations sufficient (in the opinion of
     a nationally recognized firm of independent public accountants expressed in
     a written certification thereof delivered to the Trustee), without
     consideration of any reinvestment of any interest thereon, to pay, through
     the payment of principal and interest in accordance with their terms not
     later than one day prior to the relevant due date, principal, premium, if,
     any, and interest on the Notes to maturity or redemption, as the case may
     be, and to pay all other sums payable by it hereunder, (C) no Default or
     Event of Default with respect to the Notes shall have occurred and be
     continuing on the date of such deposit, (D) such deposit will not result in
     a breach or violation of, or constitute a default under, this Indenture or
     any other agreement or instrument to which the Company or any Guarantor is
     a party or by which it is bound and (E) the Company has delivered to the
     Trustee an Officers' Certificate and an Opinion of Counsel, in each case
     stating that all conditions precedent provided for herein relating to the
     satisfaction and discharge of this Indenture have been complied with.

          With respect to the foregoing clause (i), the Company's obligations
under Section 7.06 shall survive. With respect to the foregoing clause (ii), the
Company's and the Guarantors' obligations in Sections 2.03, 2.04, 2.05, 2.06,
2.09, 2.14, 4.01, 4.02, 7.06, 7.07, 8.04, 8.05 and 8.06 and Article Ten shall
survive until the Notes and the Note Guarantees are no longer outstanding.
Thereafter, only the Company's and the Guarantors' obligations in Sections 7.06,
8.04, 8.05 and 8.06 shall survive. After any such irrevocable deposit, the
Trustee upon request shall acknowledge in writing the discharge of the Company's
and the Guarantors' obligations under the Notes, the Note Guarantees and this
Indenture except for those surviving obligations specified above.

          SECTION 8.02. Defeasance and Discharge of Indenture. The Company and
each Guarantor will be deemed to have paid and will be discharged from any and
all obligations in respect of the Notes and the Note Guarantees on the 123rd day
after the date of the deposit referred to in clause (A) of this Section 8.02,
and the provisions of this Indenture will no longer be in effect with respect to
the Notes and the Note Guarantees, and the Trustee, at the expense of the
Company, shall execute proper instruments acknowledging the same, except as to
(i) rights of registration of transfer and exchange, (ii) substitution of
apparently mutilated, defaced, destroyed, lost or stolen Notes, (iii) rights of
Holders to receive payments of principal thereof and interest thereon, (iv) the
Company's obligations under Section 4.02, (v) the rights, obligations and
immunities of the Trustee hereunder and (vi) the rights of the Holders as
beneficiaries of this Indenture with respect to the property so

<PAGE>

deposited with the Trustee payable to all or any of them; provided that the
following conditions shall have been satisfied:

          (A) the Company or the Guarantors have deposited with the Trustee, in
     trust, money and/or U.S. Government Obligations that through the payment of
     interest and principal in respect thereof in accordance with their terms
     will provide, not later than one day before the due date of any payment
     referred to in this clause (A), money in an amount sufficient in the
     opinion of a nationally recognized firm of independent public accountants
     expressed in a written certification thereof delivered to the Trustee to
     pay the principal of, premium, if any, and accrued interest on the Notes on
     the Stated Maturity of such payments in accordance with the terms of the
     Indenture and the Notes and shall have irrevocably instructed the Trustee
     to apply such money to the payment of such principal, premium and interest;

          (B) the Company has delivered to the Trustee (i) either (x) an Opinion
     of Counsel to the effect that Holders will not recognize income, gain or
     loss for federal income tax purposes as a result of the Company's or any
     Guarantor's exercise of its option under this Section 8.02 provision and
     will be subject to federal income tax on the same amount and in the same
     manner and at the same times as would have been the case if such deposit,
     defeasance and discharge had not occurred, which Opinion of Counsel must be
     based upon (and accompanied by a copy of) a ruling of the Internal Revenue
     Service to the same effect unless there has been a change in applicable
     federal income tax law after the date of this Indenture such that a ruling
     is no longer required or (y) a ruling directed to the Trustee received from
     the Internal Revenue Service to the same effect as the aforementioned
     Opinion of Counsel and (ii) an Opinion of Counsel to the effect that the
     creation of the defeasance trust does not violate the Investment Company
     Act of 1940;

          (C) immediately after giving effect to such deposit on a pro forma
     basis, no Event of Default, or event that after the giving of notice or
     lapse of time or both would become an Event of Default, shall have occurred
     and be continuing on the date of such deposit or during the period ending
     on the 123rd day after the date of such deposit, and such deposit shall not
     result in a breach or violation of, or constitute a default under, any
     other agreement or instrument to which the Company or any of its
     Subsidiaries is a party or by which the Company or any of its Subsidiaries
     is bound;

          (D) if at such time the Notes are listed on a national securities
     exchange, the Company has delivered to the Trustee an Opinion of Counsel to
     the effect that the Notes will not be delisted as a result of such deposit,
     defeasance and discharge; and

          (E) the Company has delivered to the Trustee an Officers' Certificate
     and an Opinion of Counsel, in each case stating that all conditions
     precedent provided for herein relating to the defeasance contemplated by
     this Section 8.02 have been complied with.

          Notwithstanding the foregoing, prior to the end of the 123-day (or one
year) period referred to in clause (B)(ii) of this Section 8.02, none of the
Company's or Guarantors' obligations under this Indenture shall be discharged.
Subsequent to the end of such 123-day (or one year) period with respect to this
Section 8.02, the Company's and each Guarantor's obligations in Sections 2.03,
2.04, 2.05, 2.06, 2.09, 2.14, 4.01, 4.02, 7.06, 7.07, 8.04, 8.05 and 8.06 shall
survive until the Notes are no longer outstanding. Thereafter, only the
Company's and the Guarantors' obligations in Sections 7.06, 8.05 and 8.06 shall
survive. If and when a ruling from the Internal Revenue Service or an Opinion of
Counsel referred to in clause (B)(i) of this Section 8.02 is able to be provided
specifically without regard to, and not in reliance upon, the continuance of the
Company's

<PAGE>

obligations under Section 4.01 and the Guarantors' obligations under Article
Ten, then the Company's obligations under such Section 4.01 and the Guarantors'
obligations under Article Ten shall cease upon delivery to the Trustee of such
ruling or Opinion of Counsel and compliance with the other conditions precedent
provided for herein relating to the defeasance contemplated by this Section
8.02.

          After any such irrevocable deposit, the Trustee upon request shall
acknowledge in writing the discharge of the Company's and each Guarantor's
obligations under the Notes and the Note Guarantees, respectively, and this
Indenture except for those surviving obligations in the immediately preceding
paragraph.

          SECTION 8.03. Defeasance of Certain Obligations. The Company (and the
Guarantors) may omit to comply with any term, provision or condition set forth
in clauses (iii) and (iv) of Section 5.01 and Sections 4.03 through 4.16, and
clause (c) of Section 6.01, with respect to such clauses (iii) and (iv) of
Section 5.01, and clause (d) of Section 6.01, with respect to Sections 4.03
through 4.16, and clauses (e) and (f) of Section 6.01 shall be deemed not to be
Events of Default, in each case with respect to the outstanding Notes if:

          (i) the Company has deposited with the Trustee in trust, money and/or
     U.S. Government Obligations that, through the payment of interest and
     principal in respect thereof in accordance with their terms, will provide,
     not later than one day before the due date of any payment referred to in
     this clause (i), money in an amount sufficient in the opinion of a
     nationally recognized firm of independent public accountants expressed in a
     written certification thereof delivered to the Trustee to pay the principal
     of, premium, if any, and accrued interest on the Notes on the Stated
     Maturity of such payments in accordance with the terms of this Indenture
     and the Notes and shall have irrevocably instructed the Trustee to apply
     such money to the payment of such principal, premium and interest;

          (ii) immediately after giving effect to such deposit on a pro forma
     basis, no Event of Default, or event that after the giving of notice or
     lapse of time or both would become an Event of Default, shall have occurred
     and be continuing on the date of such deposit or during the period ending
     on the 123rd day after the date of such deposit, and such deposit shall not
     result in a breach or violation of, or constitute a default under, any
     other agreement or instrument to which the Company, any of its Subsidiaries
     or any Guarantor is a party or by which the Company, the Guarantors, any of
     its Subsidiaries or any Guarantor is bound;

          (iii) the Company has delivered to the Trustee an Opinion of Counsel
     to the effect that (A) the creation of the defeasance trust does not
     violate the Investment Company Act of 1940 and (B) the Holders will not
     recognize income, gain or loss for federal income tax purposes as a result
     of such deposit and defeasance of certain obligations and will be subject
     to federal income tax on the same amount and in the same manner and at the
     same times as would have been the case if such deposit and defeasance had
     not occurred;

          (iv) at such time the Notes are listed on a national securities
     exchange, the Company has delivered to the Trustee an Opinion of Counsel to
     the effect that the Notes will not be delisted as a result of such deposit,
     defeasance and discharge; and

          (v) the Company has delivered to the Trustee an Officers' Certificate
     and an Opinion of Counsel, in each case stating that all conditions
     precedent provided for herein relating to the defeasance contemplated by
     this Section 8.03 have been complied with.

<PAGE>

          SECTION 8.04. Application of Trust Money. Subject to Sections
8.05 and 8.06, the Trustee or Paying Agent shall hold in trust money or U.S.
Government Obligations deposited with it pursuant to Section 8.01, 8.02 or 8.03,
as the case may be, and shall apply the deposited money and the money from U.S.
Government Obligations in accordance with the Notes and this Indenture to the
payment of principal of, premium, if any, and interest on the Notes; but such
money need not be segregated from other funds except to the extent required by
law.

          SECTION 8.05. Repayment to Company. Subject to Sections 7.06, 8.01,
8.02 and 8.03, the Trustee and the Paying Agent shall promptly pay to the
Company upon request set forth in an Officers' Certificate any excess money held
by them at any time and thereupon shall be relieved from all liability with
respect to such money. The Trustee and the Paying Agent shall pay to the Company
upon written request any money held by them for the payment of principal,
premium, if any, or interest that remains unclaimed for two years; provided that
the Trustee or such Paying Agent before being required to make any payment may
cause to be published at the expense of the Company once in a newspaper of
general circulation in the City of New York or mail to each Holder entitled to
such money at such Holder's address (as set forth in the Note Register) notice
that such money remains unclaimed and that after a date specified therein (which
shall be at least 30 days from the date of such publication or mailing) any
unclaimed balance of such money then remaining will be repaid to the Company.
After payment to the Company, Holders entitled to such money must look to the
Company for payment as general creditors unless an applicable law designates
another Person, and all liability of the Trustee and such Paying Agent with
respect to such money shall cease.

          SECTION 8.06. Reinstatement. If the Trustee or Paying Agent is unable
to apply any money or U.S. Government Obligations in accordance with Section
8.01, 8.02 or 8.03, as the case may be, by reason of any legal proceeding or by
reason of any order or judgment of any court or governmental authority
enjoining, restraining or otherwise prohibiting such application, the Company's
and the Guarantors' obligations under this Indenture and the Notes shall be
revived and reinstated as though no deposit had occurred pursuant to Section
8.01, 8.02 or 8.03, as the case may be, until such time as the Trustee or Paying
Agent is permitted to apply all such money or U.S. Government Obligations in
accordance with Section 8.01, 8.02 or 8.03, as the case may be; provided that,
if the Company or the Guarantors have made any payment of principal of, premium,
if any, or interest on any Notes because of the reinstatement of its
obligations, the Company or the Guarantors, as the case may be, shall be
subrogated to the rights of the Holders of such Notes to receive such payment
from the money or U.S. Government Obligations held by the Trustee or Paying
Agent.

                                  ARTICLE NINE
                       AMENDMENTS, SUPPLEMENTS AND WAIVERS

          SECTION 9.01. Without Consent of Holders. The Company and the
Guarantors, when authorized by a resolution of their Board of Directors, and the
Trustee may amend or supplement this Indenture or the Notes without notice to or
the consent of any Holder:

          (1) to cure any ambiguity, defect or inconsistency;

          (2) to comply with Article Five;

          (3) to comply with any requirements of the Commission in connection
     with the qualification of this Indenture under the TIA;

<PAGE>

          (4) to evidence and provide for the acceptance of appointment
     hereunder of a
         successor Trustee;

          (5) to provide for uncertificated Notes in addition to or in place of
     certificated
         Notes;

          (6) to add one or more Subsidiary Guarantees on the terms required by
     this
         Indenture; or

          (7) to make any change that does not adversely affect the rights of
     any Holder in any material respect.

          SECTION 9.02. With Consent of Holders. Subject to Sections 6.04 and
6.07 and without prior notice to the Holders, the Company and the Guarantors,
when authorized by their respective Boards of Directors (as evidenced by a Board
Resolution), and the Trustee may amend this Indenture and the Notes with the
written consent of the Holders of not less than a majority in principal amount
of the Notes then outstanding, and the Holders of not less than a majority in
principal amount of the Notes then outstanding by written notice to the Trustee
may waive future compliance by the Company or the Guarantors with any provision
of this Indenture or the Notes.

          Notwithstanding the provisions of this Section 9.02, without the
consent of each Holder affected, an amendment or waiver, including a waiver
pursuant to Section 6.04, may not:

          (i) change the Stated Maturity of the principal of, or any installment
     of interest on, any Note;

          (ii) reduce the principal of, or premium, if any, or interest on, any
     Note;

          (iii) change the place or currency of payment of principal of, or
     premium, if any, or interest on, any Note;

          (iv) impair the right to institute suit for the enforcement of any
     payment on or after the Stated Maturity (or, in the case of a redemption,
     on or after the Redemption Date) of any Note;

          (v) reduce the above-stated percentage of outstanding Notes the
     consent of whose Holders is necessary to modify or amend this Indenture;

          (vi) waive a default in the payment of principal of, premium, if any,
     or interest on the Notes;

          (vii) reduce the percentage or aggregate principal amount of
     outstanding Notes the consent of whose Holders is necessary for waiver of
     compliance with certain provisions of this Indenture or for waiver of
     certain defaults;

          (viii) release any Guarantor from its Note Guarantee or otherwise
     modify the terms of the Note Guarantees in a material respect adverse to
     the Holders; or

          (ix) modify any of the provisions of this Section 9.02, except to
     increase any such percentage or to provide that certain other provisions of
     this Indenture cannot be modified or waived without the consent of the
     Holder of each outstanding Note affected thereby.

<PAGE>

          It shall not be necessary for the consent of the Holders under
this Section 9.02 to approve the particular form of any proposed amendment,
supplement or waiver, but it shall be sufficient if such consent approves the
substance thereof.

          After an amendment, supplement or waiver under this Section 9.02
becomes effective, the Company shall mail to the Holders affected thereby a
notice briefly describing the amendment, supplement or waiver. The Company will
mail supplemental indentures to Holders upon request. Any failure of the Company
to mail such notice, or any defect therein, shall not, however, in any way
impair or affect the validity of any such supplemental indenture or waiver.

          SECTION 9.03. Revocation and Effect of Consent. Until an amendment or
waiver becomes effective, a consent to it by a Holder is a continuing consent by
the Holder and every subsequent Holder of a Note or portion of a Note that
evidences the same debt as the Note of the consenting Holder, even if notation
of the consent is not made on any Note. However, any such Holder or subsequent
Holder may revoke the consent as to its Note or portion of its Note. Such
revocation shall be effective only if the Trustee receives the notice of
revocation before the date the amendment, supplement or waiver becomes
effective. An amendment, supplement or waiver shall become effective on receipt
by the Trustee of written consents from the Holders of the requisite percentage
principal amount of the outstanding Notes.

          The Company may, but shall not be obligated to, fix a record date for
the purpose of determining the Holders entitled to consent to any amendment,
supplement or waiver. If a record date is fixed, then, notwithstanding the last
two sentences of the immediately preceding paragraph, those persons who were
Holders at such record date (or their duly designated proxies) and only those
persons shall be entitled to consent to such amendment, supplement or waiver or
to revoke any consent previously given, whether or not such persons continue to
be Holders after such record date. No such consent shall be valid or effective
for more than 90 days after such record date.

          After an amendment, supplement or waiver becomes effective, it shall
bind every Holder unless it is of the type described in any of clauses (i)
through (v) of Section 9.02. In case of an amendment or waiver of the type
described in clauses (i) through (v) of Section 9.02, the amendment or waiver
shall bind each Holder who has consented to it and every subsequent Holder of a
Note that evidences the same indebtedness as the Note of the consenting Holder.

          SECTION 9.04. Notation on or Exchange of Notes. If an amendment,
supplement or waiver changes the terms of a Note, the Trustee may require the
Holder to deliver it to the Trustee. The Trustee may place an appropriate
notation on the Note about the changed terms and return it to the Holder and the
Trustee may place an appropriate notation on any Note thereafter authenticated.
Alternatively, if the Company or the Trustee so determines, the Company in
exchange for the Note shall issue and the Trustee shall authenticate a new Note
that reflects the changed terms. Failure to make the appropriate notation or
issue a new Note shall not affect the validity and effect of such amendment,
supplement or waiver.

          SECTION 9.05. Trustee to Sign Amendments, Etc. The Trustee shall be
entitled to receive, and shall be fully protected in relying upon, an Opinion of
Counsel stating that the execution of any amendment, supplement or waiver
authorized pursuant to this Article Nine is authorized or permitted by this
Indenture. Subject to the preceding sentence, the Trustee shall sign such
amendment, supplement or waiver if the same does not adversely affect the rights
of the Trustee. The Trustee may, but shall not be obligated to, execute any such
amendment, supplement or waiver that affects the Trustee's own rights, duties or
immunities under this Indenture or otherwise.

<PAGE>

          SECTION 9.06. Conformity with Trust Indenture Act. Every supplemental
indenture executed pursuant to this Article Nine shall conform to the
requirements of the TIA as then in effect.

                                   ARTICLE TEN
                               GUARANTEE OF NOTES

          SECTION 10.01. Note Guarantee. Subject to the provisions of this
Article Ten, each of the Guarantors, as primary obligors and not merely as
sureties, hereby fully, unconditionally and irrevocably guarantees on a senior
basis to each Holder and to the Trustee on behalf of the Holders: (i) the due
and punctual payment of the principal of, premium, if any, on and interest on
each Note, when and as the same shall become due and payable, whether, by
acceleration, required repurchase (including by reason of Change of Control),
call for redemption or otherwise, the due and punctual payment of interest on
the overdue principal of and interest, if any, on the Notes, to the extent
lawful (in each case including interest accruing on or after filing of any
petition in bankruptcy or reorganization relating to the Company or any
Guarantor, whether or not a claim for post filing interest is allowed in such
proceeding), and the due and punctual performance of all other obligations of
the Company to the Holders or the Trustee, all in accordance with the terms of
such Note and this Indenture and (ii) in the case of any extension of time of
payment or renewal of any Note or any of such other obligations, that the same
will be promptly paid in full when due or performed in accordance with the terms
of the extension or renewal, at Stated Maturity, by acceleration, required
repurchase (including by reason of Change of Control), call for redemption or
otherwise. Each of the Guarantors hereby waives diligence, presentment, demand
of payment, filing of claims with a court in the event of merger or bankruptcy
of the Company, any right to require a proceeding first against the Company, the
benefit of discussion, protest or notice with respect to any such Note or the
debt evidenced thereby and all demands whatsoever, and covenants that this Note
Guarantee will not be discharged as to any such Note except by payment in full
of the principal thereof and interest thereon and as provided in Section 8.01
and Section 8.02 (subject to Section 8.06). The obligations of the Guarantors
hereunder shall not be affected by any failure or delay of the Trustee to
exercise any right or remedy under this Indenture, the Notes or this Note
Guarantee. The maturity of the obligations guaranteed hereby may be accelerated
as provided in Article Six for the purposes of this Article Ten. In the event of
any declaration of acceleration of such obligations as provided in Article Six,
such obligations (whether or not due and payable) shall forthwith become due and
payable by the Guarantors for the purpose of this Article Ten. In addition,
without limiting the foregoing provisions, upon the effectiveness of an
acceleration under Article Six, the Trustee shall promptly make a demand for
payment on the Notes under the Note Guarantee provided for in this Article Ten.

          The Note Guarantee shall remain in full force and effect and continue
to be effective should any petition be filed by or against the Company for
liquidation or reorganization, should the Company become insolvent or make an
assignment for the benefit of creditors or should a receiver or trustee be
appointed for all or any significant portion of the Company's assets, and if the
Trustee or the Holder of any Note is required by any court or otherwise to
return to the Company or any Guarantor, or any custodian, receiver, liquidator,
trustee, sequestrator or other similar official acting in relation to the
Company or the Guarantors, any amount paid to the Trustee or such Holder in
respect of a Note, this Note Guarantee, to the extent theretofore discharged,
shall continue to be effective or be reinstated in full force and effect, as the
case may be, all as though such payment has not been made. Each of the
Guarantors further agrees, to the fullest extent that it may lawfully do so,
that, as between the Guarantors, on the one hand, and the Holders and the
Trustee, on the other hand, the maturity of the obligations guaranteed hereby
may be accelerated as provided in Article Six hereof for the purposes of this
Note Guarantee, notwithstanding any stay, injunction or other prohibition extant
under any applicable bankruptcy law preventing such acceleration in respect of
the obligations Guaranteed hereby.

<PAGE>

          Each of the Guarantors hereby irrevocably waives any claim or other
rights which it may now or hereafter acquire against the Company that arise from
the existence, payment, performance or enforcement of its obligations under this
Note Guarantee and this Indenture, including, without limitation, any right of
subrogation, reimbursement, exoneration, contribution, indemnification, any
right to participate in any claim or remedy of the Holders against the Company
or any collateral which any such Holder or the Trustee on behalf of such Holder
hereafter acquires, whether or not such claim, remedy or right arises in equity,
or under contract, statute or common law, including, without limitation, the
right to take or receive from the Company, directly or indirectly, in cash or
other property or by set-off or in any other manner, payment or security on
account of such claim or other rights until such time as the Notes and all of
the Company's other obligations being guaranteed hereby shall have been
indefeasibly paid in full. If any amount shall be paid to the Guarantors in
violation of the preceding sentence and the principal of, premium, if any, and
accrued interest on the Notes shall not have been paid in full, such amount
shall be deemed to have been paid to the Guarantors for the benefit of, and held
in trust for the benefit of, the Holders, and shall forthwith be paid to the
Trustee for the benefit of the Holders to be credited and applied upon the
principal of, premium, if any, and accrued interest on the Notes. Each of the
Guarantors acknowledges that it will receive direct and indirect benefits from
the issuance of the Notes pursuant to this Indenture and that the waivers set
forth in this Section 10.01 are knowingly made in contemplation of such
benefits.

          The Note Guarantee set forth in this Section 10.01 shall not be valid
or become obligatory for any purpose with respect to a Note until the
certificate of authentication on such Note shall have been signed by or on
behalf of the Trustee.

          SECTION 10.02. Obligations Unconditional. Subject to Section 10.05,
nothing contained in this Article Ten or elsewhere in this Indenture or in the
Notes is intended to or shall impair, as among any Guarantor and the Holders,
the obligation of such Guarantor, which is absolute, unconditional and
irrevocable, upon failure by the Company, to pay to the Holders the principal
of, premium, if any, and interest on the Notes as and when the same shall become
due and payable in accordance with their terms, or is intended to or shall
affect the relative rights of the Holders and creditors of such Guarantor, nor
shall anything herein or therein prevent the Holder of any Note or the Trustee
on their behalf from exercising all remedies otherwise permitted by applicable
law upon default under this Indenture.

          Without limiting the foregoing, nothing contained in this Article Ten
will restrict the right of the Trustee or the Holders to take any action to
declare the Note Guarantee to be due and payable prior to the Stated Maturity of
the Notes pursuant to Section 6.02 or to pursue any rights or remedies
hereunder.

          SECTION 10.03. Notice to Trustee. The Guarantors shall give prompt
written notice to the Trustee of any fact known to the Guarantors which would
prohibit the making of any payment to or by the Trustee in respect of the Note
Guarantee pursuant to the provisions of this Article Ten.

          SECTION 10.04. This Article Not to Prevent Events of Default. The
failure to make a payment on account of principal of, premium, if any, or
interest on the Notes by reason of any provision of this Article Ten will not be
construed as preventing the occurrence of an Event of Default.

          SECTION 10.05. Net Worth Limitation. Notwithstanding any other
provision of this Indenture or the Notes, the Note Guarantee shall not be
enforceable against any Guarantor in an amount in excess of the net worth of
such Guarantor at the time that determination of such net worth is, under
applicable law, relevant to the enforceability of the Note Guarantee. Such net
worth shall

<PAGE>

include any claim of any Guarantor against the Company for reimbursement and any
claim against any grantor of a Subsidiary Guarantee for contribution.

                                 ARTICLE ELEVEN
                                  MISCELLANEOUS

          SECTION 11.01. Trust Indenture Act of 1939. This Indenture is subject
to the provisions of the TIA that are required to be a part of this Indenture
and shall, to the extent applicable, be governed by such provisions.

          SECTION 11.02. Notices. Any notice or communication shall be
sufficiently given if in writing and delivered in person or mailed by first
class mail (registered or certified, return receipt requested), telex,
telecopier or overnight air courier guaranteeing next day delivery addressed as
follows:

        if to the Company:

                 Amtran, Inc.
                 7337 West Washington Street
                 Indianapolis, IN  46231
                 Telecopier No.:  (317) 240-7091

                 Attention:  Kenneth K. Wolff, Chief Financial Officer

        if to the Trustee:

                 First Security Bank, N.A.
                 79 South Main Street
                 Salt Lake City, Utah  84111
                 Telecopier No.:  (801) 246-5053
                 Attention:  Corporate Trust Services

          The Company, the Guarantors or the Trustee by notice to the other may
designate additional or different addresses for subsequent notices or
communications.

          All notices and communications (other than those sent to Holders)
shall be deemed to have been duly given: (i) at the time delivered by hand, if
personally delivered; five Business Days after being deposited in the mail,
postage prepaid, if mailed; when answered back, if telexed; when receipt
acknowledged, if telecopied; and the next Business Day after timely delivery to
the courier, if sent by overnight air courier guaranteeing next day delivery.

          Any notice or communication to a Holder shall be mailed by first class
mail (certified or registered, return receipt requested) to its address shown on
the register kept by the Registrar and shall be sufficiently given to such
Holder if so mailed or delivered within the time presented. Any notice or
communication shall also be so mailed to any Person described in TIA Section
313(c), to the extent required by the TIA.

          Failure to mail a notice or communication to a Holder or any defect in
it shall not affect its sufficiency with respect to other Holders. Except for a
notice to the Trustee, which is deemed given only when received, and except as
otherwise provided in this Indenture, if a notice or communication is mailed in
the manner provided in this Section 11.02, it is duly given, whether or not the
addressee receives it.

<PAGE>

          Holders may communicate pursuant to TIA Section 312(b) with other
Holders with respect to their rights under this Indenture or the Notes. The
Company, the Trustee, the Registrar and anyone else shall have the protection of
TIA Section 312(c).

          SECTION 11.03. Certificate and Opinion As to Conditions Precedent.
Upon any request or application by the Company or the Guarantors to the Trustee
to take any action under this Indenture, the Company or the Guarantors shall
furnish to the Trustee:

          (i) an Officers' Certificate reasonably satisfactory to the Trustee
     stating that, in the opinion of the signers, all conditions precedent, if
     any, provided for in this Indenture relating to the proposed action have
     been complied with; and

          (ii) an Opinion of Counsel reasonably satisfactory to the Trustee
     stating that, in the opinion of such Counsel, all such conditions precedent
     have been complied with.

          SECTION 11.04. Statements Required in Certificate or Opinion.
Each certificate or opinion with respect to compliance with a condition or
covenant provided for in this Indenture shall include:

          (i) a statement that the person making such certificate or opinion has
     read such covenant or condition;

          (ii) a brief statement as to the nature and scope of the examination
     or investigation upon which the statement or opinion contained in such
     certificate or opinion is based;

          (iii) a statement that, in the opinion of such person, he has made
     such examination or investigation as is necessary to enable him to express
     an informed opinion as to whether or not such covenant or condition has
     been complied with; and

          (iv) a statement as to whether or not, in the opinion of such person,
     such condition or covenant has been complied with, and such other opinions
     as the Trustee may reasonably request; provided, however, that, with
     respect to matters of fact, an Opinion of Counsel may rely on an Officers'
     Certificate or certificates of public officials.

          SECTION 11.05. Acts of Holders. (a) Any request, demand,
authorization, direction, notice, consent, waiver or other action provided by
this Indenture to be given or taken by Holders may be embodied in and evidenced
by one or more instruments of substantially similar tenor signed by such Holders
in person or by an agent duly appointed in writing; and, except as herein
otherwise expressly provided, such action shall become effective when such
instrument or instruments are delivered to the Trustee and, where it is hereby
expressly required, to the Company. Proof of execution of any such instrument or
of a writing appointing any such agent shall be sufficient for any purpose of
this Indenture and conclusive in favor of the Trustee and the Company, if made
in the manner provided in this Section.

          (b) The ownership of Notes shall be proved by the Note Register.

          (c) Any request, demand, authorization, direction, notice, consent,
waiver or other action by the Holder of any Note shall bind every future Holder
of the same Note or the Holder of every Note issued upon the transfer thereof or
in exchange therefor or in lieu thereof, in respect of anything done, suffered
or omitted to be done by the Trustee, any Paying Agent or the Company in
reliance thereon, whether or not notation of such action is made upon such Note.

<PAGE>

          (d) If the Company shall solicit from the Holders any request, demand,
authorization, direction, notice, consent or waiver or other act, the Company
may, at its option, by or pursuant to a Board Resolution, fix in advance a
record date for the determination of such Holders entitled to give such request,
demand, authorization, direction, notice, consent, waiver or other act, but the
Company shall have no obligation to do so. Notwithstanding Trust Indenture Act
Section 316(c), any such record date shall be the record date specified in or
pursuant to such Board Resolution, which shall be a date not more than 30 days
prior to the first solicitation of Holders generally in connection therewith and
no later than the date such solicitation is completed.

          If such a record date is fixed, such request, demand, authorization,
direction, notice, consent, waiver or other act may be given before or after
such record date, but only the Holders of record at the close of business on
such record date shall be deemed to be Holders for purposes of determining
whether Holders of the requisite proportion of Notes then outstanding have
authorized or agreed or consented to such request, demand, authorization,
direction, notice, consent, waiver or other act, and for this purpose the Notes
then outstanding shall be computed as of such record date; provided that no such
request, demand, authorization, direction, notice, consent, waiver or other act
by the Holders on such record date shall be deemed effective unless it shall
become effective pursuant to the provisions of this Indenture not later than six
months after the record date.

          SECTION 11.06. Rules by Trustee, Paying Agent or Registrar. The
Trustee may make reasonable rules for action by or at a meeting of Holders. The
Paying Agent or Registrar may make reasonable rules for its functions.

          SECTION 11.07. Payment Date Other Than a Business Day. If an Interest
Payment Date, Redemption Date, Payment Date for an Offer to Purchase, Stated
Maturity or date of maturity of any Note shall not be a Business Day at any
place of payment, then payment of principal of, premium, if any, or interest on
such Note, as the case may be, need not be made on such date, but may be made on
the next succeeding Business Day at such place of payment with the same force
and effect as if made on the Interest Payment Date, Payment Date for an Offer to
Purchase, or Redemption Date, or at the Stated Maturity or date of maturity of
such Note; provided that no interest shall accrue for the period from and after
such Interest Payment Date, Payment Date for an Offer to Purchase, Redemption
Date, Stated Maturity or date of maturity, as the case may be.

          SECTION 11.08. Governing Law. This Indenture and the Notes shall be
governed by and construed in accordance with the internal laws of the State of
New York. The Trustee, the Company, each of the Guarantors and the Holders agree
to submit to the jurisdiction of the courts of the State of New York in any
action or proceeding arising out of or relating to this Indenture or the Notes.

          SECTION 11.09. No Adverse Interpretation of Other Agreements. This
Indenture may not be used to interpret another indenture, loan or debt agreement
of the Company, the Guarantors or any Subsidiary of the Company. Any such
indenture, loan or debt agreement may not be used to interpret this Indenture.

          SECTION 11.10. No Recourse Against Others. No recourse for the payment
of the principal of, premium, if any, or interest on any of the Notes, or for
any claim based thereon or otherwise in respect thereof, and no recourse under
or upon any obligation, covenant or agreement of the Company or the Guarantors
contained in this Indenture, any Guarantee or in any of the Notes, or because of
the creation of any Indebtedness represented thereby, shall be had against any
incorporator or against any past, present or future partner, shareholder, other
equityholder, officer, director, employee or controlling person, as such, of the
Company or of any successor Person, either directly or through the Company or
the Guarantors or any successor Person, whether by virtue of

<PAGE>

any constitution, statute or rule of law, or by the enforcement of any
assessment or penalty or otherwise; it being expressly understood that all such
liability is hereby expressly waived and released as a condition of, and as a
consideration for, the execution of this Indenture and the issue of the Notes.

          SECTION 11.11. Successors. All agreements of the Company and the
Guarantors in this Indenture and the Notes shall bind its successors. All
agreements of the Trustee in this Indenture shall bind its successor.

          SECTION 11.12. Duplicate Originals. The parties may sign any number of
copies of this Indenture. Each signed copy shall be an original, but all of them
together represent the same agreement.

          SECTION 11.13. Separability. In case any provision in this Indenture
or in the Notes shall be invalid, illegal or unenforceable, the validity,
legality and enforceability of the remaining provisions shall not in any way be
affected or impaired thereby.

          SECTION 11.14. Table of Contents, Headings, Etc. The Table of
Contents, Cross- Reference Table and headings of the Articles and Sections of
this Indenture have been inserted for convenience of reference only, are not to
be considered a part hereof and shall in no way modify or restrict any of the
terms and provisions hereof.

                                 ARTICLE TWELVE
                               MEETINGS OF HOLDERS

          SECTION 12.01. Purposes for Which Meetings May Be Called. A
meeting of Holders may be called at any time and from time to time pursuant to
the provisions of this Article Twelve for any of the following purposes:

          (a) to give any notice to the Company or to the Trustee, or to give
     any directions to the Trustee, or to waive or to consent to the waiving of
     any Default or Event of Default hereunder and its consequences, or to take
     any other action authorized to be taken by Holders pursuant to any of the
     provisions of Article Six;

          (b) to remove the Trustee or appoint a successor Trustee pursuant to
     the provisions of Article Seven;

          (c) to consent to an amendment, supplement or waiver pursuant to the
     provisions of Section 9.02; or

          (d) to take any other action authorized to be taken by or on behalf of
     the Holders of any specified aggregate principal amount of the Notes under
     any other provision of this Indenture, or authorized or permitted by law.

          SECTION 12.02. Manner of Calling Meetings. The Trustee may at any time
call a meeting of Holders to take any action specified in Section 12.01, to be
held at such time and at such place in The City of New York, New York or
elsewhere as the Trustee will determine. Notice of every meeting of Holders,
setting forth the time and place of such meeting and in general terms the action
proposed to be taken at such meeting, will be mailed by the Trustee, first-class
postage prepaid, to the Company and to the Holders at their last addresses as
they will appear on the

<PAGE>

registration books of the Registrar not less than 10 nor more than 60 days prior
to the date fixed for a meeting.

          Any meeting of Holders will be valid without notice if the Holders of
all outstanding Notes are present in Person or by proxy, or if notice is waived
before or after the meeting by the Holders of all outstanding Notes, and if the
Company and the Trustee are either present by duly authorized representatives or
have, before or after the meeting, waived notice.

          SECTION 12.03. Call of Meetings by the Company or Holders. In case at
any time the Company, pursuant to a Board Resolution, or the Holders of not less
than 10% in aggregate principal amount of the outstanding Notes will have
requested the Trustee to call a meeting of Holders to take any action specified
in Section 12.01, by written request setting forth in reasonable detail the
action proposed to be taken at the meeting, and the Trustee will not have mailed
the notice of such meeting within 20 days after receipt of such request, then
the Company or the Holders of Notes in the amount above specified may determine
the time and place in The City of New York, New York or elsewhere for such
meeting and may call such meeting for the purpose of taking such action, by
mailing or causing to be mailed notice thereof as provided in Section 12.02, or
by causing notice thereof to be published at least once in each of two
successive calendar weeks (on any Business Day during such week) in a newspaper
or newspapers printed in the English language, customarily published at least
five days a week of a general circulation in The City of New York, State of New
York, the first such publication to be not less than 10 nor more than 60 days
prior to the date fixed for the meeting.

          SECTION 12.04. Who May Attend and Vote at Meetings. To be entitled to
vote at any meeting of Holders, a Person will (i) be a registered Holder of one
or more Notes, or (ii) be a Person appointed by an instrument in writing as
proxy for the registered Holder or Holders of Notes. The only Persons who will
be entitled to be present or to speak at any meeting of Holders will be the
Persons entitled to vote at such meeting and their counsel and any
representatives of the Trustee and its counsel and any representatives of the
Company and their counsel.

          SECTION 12.05. Quorum; Action. The Persons entitled to vote a majority
in principal amount of the outstanding Notes shall constitute a quorum. In the
absence of a quorum within 30 minutes of the time appointed for any such
meeting, the meeting shall, if convened at the request of Holders of Notes, be
dissolved. In any other case the meeting may be adjourned for a period of not
less than 10 days as determined by the chairman of the meeting prior to the
adjournment of such meeting. In the absence of a quorum at any such adjourned
meeting, such adjourned meeting may be further adjourned for a period of not
less than 10 days as determined by the chairman of the meeting prior to the
adjournment of such adjourned meeting. Notice of the reconvening of any
adjourned meeting shall be given as provided in Section 12.02, except that such
notice need be given only once and not less than five days prior to the date on
which the meeting is scheduled to be reconvened. Notice of the reconvening of an
adjourned meeting shall state expressly the percentage of the principal amount
of the outstanding Notes which shall constitute a quorum.

          Subject to the foregoing, at the reconvening of any meeting adjourned
for a lack of a quorum, the Persons entitled to vote 25% in principal amount of
the outstanding Notes at the time shall constitute a quorum for the taking of
any action set forth in the notice of the original meeting.

          At a meeting or an adjourned meeting duly reconvened and at which a
quorum is present as aforesaid, any action or matter, except as otherwise
specified herein, shall be effectively passed and decided if passed or decided
by the Persons entitled to vote not less than a majority in principal amount of
outstanding Notes represented and voting at such meeting.

<PAGE>

          Any action or matter passed or decision taken at any meeting
of Holders of Notes duly held in accordance with this Section 12.05 shall be
binding on all the Holders of Notes, whether or not present or represented at
the meeting.

          SECTION 12.06. Regulations May Be Made by Trustee; Conduct of the
Meeting; Voting Rights; Adjournment. Notwithstanding any other provision of this
Indenture, the Trustee may make such reasonable regulations as it may deem
advisable for any action by or any meeting of Holders, in regard to proof of the
holding of Notes and of the appointment of proxies, and in regard to the
appointment and duties of inspectors of votes, and submission and examination of
proxies, certificates and other evidence of the right to vote, and such other
matters concerning the conduct of the meeting as it will think appropriate. Such
regulations may fix a record date and time for determining the Holders of record
of Notes entitled to vote at such meeting, in which case those and only those
Persons who are Holders of Notes at the record date and time so fixed, or their
proxies, will be entitled to vote at such meeting whether or not they will be
such Holders at the time of the meeting.

          The Trustee will, by an instrument in writing, appoint a
temporary chairman of the meeting, unless the meeting will have been called by
the Company or by Holders as provided in Section 12.03, in which case the
Company or the Holders calling the meeting, as the case may be, will in like
manner appoint a temporary chairman. A permanent chairman and a permanent
secretary of the meeting will be elected by vote of the Holders of a majority in
principal amount of the Notes represented at the meeting and entitled to vote.

          At any meeting each Holder or proxy will, subject to the
provisions of Section 12.04 hereof, be entitled to one vote for each $1,000
principal amount of Notes held or represented by him or her; provided, however,
that no vote will be cast or counted at any meeting in respect of any Notes
challenged as not outstanding and ruled by the chairman of the meeting to be not
outstanding. The chairman may adjourn any such meeting if he is unable to
determine whether any Holder or proxy will be entitled to vote at such meeting.
The chairman of the meeting will have no right to vote other than by virtue of
Notes held by him or instruments in writing as aforesaid duly designating him as
the proxy to vote on behalf of other Holders. Any meeting of Holders duly called
pursuant to the provisions of Section 12.02 or Section 12.03 may be adjourned
from time to time by vote of the Holders of a majority in aggregate principal
amount of the Notes represented at the meeting and entitled to vote, and the
meeting may be held as so adjourned without further notice.

          SECTION 12.07. Voting at the Meeting and Record to Be Kept.
The vote upon any resolution submitted to any meeting of Holders will be by
written ballots on which will be subscribed the signatures of the Holders of
Notes or/of their representatives by proxy and the principal amount of the Notes
voted by the ballot. The permanent chairman of the meeting will appoint two
inspectors of votes, who will count all votes cast at the meeting for or against
any resolution and will make and file with the secretary of the meeting their
verified written reports in duplicate of all votes cast at the meeting. A record
in duplicate of the proceedings of each meeting of Holders will be prepared by
the secretary of the meeting and there will be attached to such record the
original reports of the inspectors of votes on any vote by ballot taken thereat
and affidavits by one or more Persons having knowledge of the facts, setting
forth a copy of the notice of the meeting and showing that such notice was
mailed as provided in Section 12.02. The record will be signed and verified by
the affidavits of the permanent chairman and the secretary of the meeting and
one of the duplicates will be delivered to the Company and the other to the
Trustee to be preserved by the Trustee, the latter to have attached thereto the
ballots voted at the meeting.

          Any record so signed and verified will be conclusive evidence of the
matters therein
stated.

<PAGE>

          SECTION 12.08. Exercise of Rights of Trustee or Holders May
Not Be Hindered or Delayed by Call of Meeting. Nothing contained in this Article
Twelve will be deemed or construed to authorize or permit, by reason of any call
of a meeting of Holders or any rights expressly or impliedly conferred hereunder
to make such call, any hindrance or delay in the exercise of any right or rights
conferred upon or reserved to the Trustee or to the Holders under any of the
provisions of this Indenture or of the Notes.

          SECTION 12.09. Procedures Not Exclusive. The procedures set forth in
this Article Twelve are not exclusive and the rights and obligations of the
Company, the Trustee and the Holders under other Articles of this Indenture
(including, without limitation, Articles Six, Seven, Eight and Nine) will in no
way be limited by the provisions of this Article Twelve.

<PAGE>

                                   SIGNATURES

          IN WITNESS WHEREOF, the parties hereto have caused this Indenture to
be duly executed, all as of the date first written above.

                                          AMTRAN, INC.,
                                              as Issuer

                                          By: /s/ Kenneth K. Wolff
                                              ---------------------------------
                                              Name:
                                              Title:

                                          AMERICAN TRANS AIR, INC.,
                                              as Guarantor

                                          By: /s/ Kenneth K. Wolff
                                              ---------------------------------
                                              Name:
                                              Title:

                                          AMBASSADAIR TRAVEL CLUB, INC.,
                                              as Guarantor

                                          By: /s/ Kenneth K. Wolff
                                              ---------------------------------
                                              Name:
                                              Title:

                                          ATA VACATIONS, INC.,
                                              as Guarantor

                                          By: /s/ Kenneth K. Wolff
                                              ---------------------------------
                                              Name:
                                              Title:

                                          AMBER TRAVEL, INC.,
                                              as Guarantor

                                          By: /s/ Kenneth K. Wolff
                                              ---------------------------------

<PAGE>

                                              Name:
                                              Title:

                                          AMERICAN TRANS AIR TRAINING
                                            CORPORATION,
                                            as Guarantor

                                          By: /s/ Kenneth K. Wolf
                                              ---------------------------------
                                              Name:
                                              Title:

                                          AMERICAN TRANS AIR
                                            EXECUJET, INC.,
                                            as Guarantor

                                          By: /s/ Kenneth K. Wolff
                                              ---------------------------------
                                              Name:
                                              Title:

                                          AMBER AIR FREIGHT CORPORATION,
                                            as Guarantor

                                           By: /s/ Kenneth K. Wolff
                                               --------------------------------
                                               Name:
                                               Title:

<PAGE>

                                          FIRST SECURITY BANK, N.A.,
                                            as Trustee

                                          By: /s/ Greg A. Hawley
                                              ---------------------------------
                                              Name:
                                              Title:

<PAGE>

                                                                    Exhibit 4.2

                                                                      EXHIBIT A
                                                                      ---------

                                   GLOBAL NOTE

                                 [FACE OF NOTE]

                                  AMTRAN, INC.

                          10 1/2% Senior Notes due 2004

                                                     [CUSIP] [CINS] 03234G AE 6
                                                                    -----------

No.                                                                  $_________

          AMTRAN INC., an Indiana corporation (the "Company", which term
includes any successor under the Indenture hereinafter referred to), for value
received, promises to pay to _____________, or its registered assigns, the
principal sum of ____________ ($____) on August 1, 2004.

          Interest Payment Dates: February 1 and August 1, commencing
          August 1, 2000.

          Regular Record Dates: January 15 and July 15.

          Reference is hereby made to the further provisions of this Note set
forth on the reverse hereof, which further provisions shall for all purposes
have the same effect as if set forth at this place.

<PAGE>

          IN WITNESS WHEREOF, the Company has caused this Note to be signed
manually or by facsimile by its duly authorized officers.

Date:  December 21, 1999                  AMTRAN, INC.

                                          By: /s/ John P. Tague
                                              ---------------------------------
                                              Name:  John P. Tague
                                              Title: President & CEO

                                          By: Kenneth K. Wolff
                                              ---------------------------------
                                              Name:  Kenneth K. Wolff
                                              Title: Executive V.P. & CFO

<PAGE>

                    (Trustee's Certificate of Authentication)

This is one of the 10 1/2% Senior Notes due 2004 described in the
within-mentioned Indenture.

                                          FIRST SECURITY BANK, N.A.,
                                            as Trustee

                                          By: /s/ Greg A. Hawley
                                              ---------------------------------
                                              Authorized Signatory

<PAGE>

                             [REVERSE SIDE OF NOTE]

                                  AMTRAN, INC.

                          10 1/2% Senior Note due 2004

1.  Principal and Interest.

          The Company will pay the principal of this Note on August 1, 2004.

          The Company promises to pay interest on the principal amount of this
Note on each Interest Payment Date, as set forth below, at the rate per annum
shown above.

          Interest will be payable semiannually (to the holders of record of the
Notes at the close of business on the January 15 or July 15 immediately
preceding the Interest Payment Date) on each Interest Payment Date, commencing
February 1, 1998.

          If (i) the Shelf Registration Statement or Exchange Offer Registration
Statement, as applicable under the Registration Agreement, is not filed with the
Commission on or prior to 45 days after the Closing Date, (ii) the Exchange
Offer Registration Statement or the Shelf Registration Statement, as the case
may be, is not declared effective within 150 days after the Closing Date, (iii)
the Registered Exchange Offer is not consummated on or prior to the 30th day
after the date on which the Exchange Offer Registration Statement was declared
effective, or (iv) the Shelf Registration Statement is filed and declared
effective but shall thereafter cease to be effective at any time prior to the
second anniversary of its effective date (other than after such time as all
Notes have been disposed of) in accordance with the terms of the Registration
Rights Agreement dated as of July 24, 1997 among the Company, the Guarantors (as
defined therein) and Deutsche Bank Alex. Brown, then additional interest
("Additional Interest") shall accrue on the principal amount of the Notes, (A)
in the case of (i) above, commencing on the day after either such required
filing date, at a rate of .50% per annum for the first 90 days immediately
following each such filing date, such Additional Interest increasing by an
additional 0.50% per annum at the beginning of each subsequent 90-day period;
(B) in the case of (ii) above, commencing on the day after either such required
effective date, at a rate of .50% per annum for the first 90 days immediately
following each such filing date, such Additional Interest increasing by an
additional 0.50% per annum at the beginning of each subsequent 90-day period;
(C) in the case of (iii) above, commencing on the 31st day after sucheffective
date, at a rate of .50% per annum for the first 90 days immediately following
each such filing date, such Additional Interest increasing by an additional
0.50% per annum at the beginning of each subsequent 90-day period; or (D) in the
case of (iv) above, commencing on the day after such Shelf Registration
Statement ceases to eb effective, at a rate of .50% per annum for the first 90
days immediately following each such filing date, such Additional Interest
increasing by an additional 0.50% per annum at the beginning of each subsequent
90-day period; provided, however, that the Additional Interest rate on the Notes
may not exceed in the aggregate 2.0%. The Holder of this Note is entitled to the
benefits of such Registration Rights Agreement.

          Interest on the Notes will accrue from the most recent date to which
interest has been paid or, if no interest has been paid, from July 24, 1997;
provided that, if there is no existing default in the payment of interest and
this Note is authenticated between a Regular Record Date referred to on the face
hereof and the next succeeding Interest Payment Date, interest shall accrue from
such Interest Payment Date. Interest will be computed on the basis of a 360-day
year of twelve 30-day months.

<PAGE>

          The Company shall pay interest on overdue principal and premium, if
any, and interest on overdue installments of interest, to the extent lawful, at
a rate borne by the Notes.

2.  Method of Payment.

          The Company will pay interest (except defaulted interest) on the
principal amount of the Notes as provided above on each February 1 and August 1
to the persons who are Holders (as reflected in the Note Register at the close
of business on the January 15 and July 15 immediately preceding the Interest
Payment Date), in each case, even if the Note is cancelled on registration of
transfer, registration of exchange, redemption or repurchase after such record
date; provided that, with respect to the payment of principal, the Company will
make payment to the Holder that surrenders this Note to a Paying Agent on or
after August 1, 2004.

          The Company will pay principal, premium, if any, and as provided
above, interest in money of the United States that at the time of payment is
legal tender for payment of public and private debts. However, the Company, at
its option, may pay principal, premium, if any, and interest by its check
payable in such money. It may mail an interest check to a Holder's registered
address (as reflected in the Note Register). If a payment date is a date other
than a Business Day at a place of payment, payment may be made at that place on
the next succeeding day that is a Business Day and no interest shall accrue for
the intervening period.

3.  Paying Agent and Registrar.

          Initially, the Trustee will act as authenticating agent, Paying Agent
and Registrar. The Company may change any authenticating agent, Paying Agent or
Registrar without notice. The Company, any Subsidiary or any Affiliate of any of
them may act as Paying Agent, Registrar or co- Registrar.

4.  Indenture; Limitations.

          The Company issued the Notes under an Indenture dated as of July 24,
1997 (the "Indenture"), between the Company, the Guarantors and First Security
Bank, N.A., as trustee (the "Trustee"). Capitalized terms herein are used as
defined in the Indenture unless otherwise indicated. The terms of the Notes
include those stated in the Indenture and those made part of the Indenture by
reference to the Trust Indenture Act. The Notes are subject to all such terms,
and Holders are referred to the Indenture and the Trust Indenture Act for a
statement of all such terms. To the extent permitted by applicable law, in the
event of any inconsistency between the terms of this Note and the terms of the
Indenture, the terms of the Indenture shall control.

          The Notes are unsecured senior obligations of the Company. The Company
may, subject to Article Four of the Indenture, issue additional Notes under the
Indenture.

5.  Redemption.

          The Notes will be redeemable, at the Company's option, in whole or in
part, at any time or from time to time, on or after August 1, 2002 and prior to
maturity, upon not less than 30 nor more than 60 days' prior notice mailed by
first class mail to each Holders' last address as it appears in the Note
Register, at the following Redemption Prices (expressed in percentages of
principal amount), plus accrued and unpaid interest, if any, to the Redemption
Date (subject to the right of

<PAGE>

Holders of record on the relevant Regular Record Date that is on or prior to the
Redemption Date to receive interest due on an Interest Payment Date), if
redeemed during the 12-month period commencing August 1 of the years set forth
below:

    Redemption

                  Year
                  ----
       Price
       -----
                  2002     .......................   105.250%
                  2003     .......................   102.625%

          In addition, at any time prior to August 1, 2000, the Company may
redeem up to 35% of the principal amount of the Notes with the proceeds of one
or more sales of its Common Stock, at any time or from time to time in part, at
a Redemption Price (expressed as a percentage of principal amount) of 110.50%,
plus accrued and unpaid interest to the Redemption Date (subject to the rights
of Holders of record on the relevant Regular Record Date that is prior to the
Redemption Date to receive interest due on an Interest Payment Date); provided
that at least $65 million aggregate principal amount of Notes remains
outstanding after each such redemption.

          In the event that more than 98% of the outstanding principal amount of
the Notes are tendered pursuant to an Offer to Purchase, as required by Section
4.11 or Section 4.12, the balance of the Notes will be redeemable, at the
Company's option, in whole or in part, at any time or from time to time
thereafter and prior to maturity, upon not less than 30 nor more than 60 days'
prior notice mailed by first class mail to each Holder's last address as it
appears in the Note Register, at a Redemption Price equal to the price specified
in such Offer to Purchase plus accrued and unpaid interest, if any, to the
Redemption Date (subject to the right of Holders of record on the relevant
Regular Record Date that is on or prior to the Redemption Date to receive
interest due on an Interest Payment Date).

          Notice of any optional redemption will be mailed at least 30 days but
not more than 60 days before the Redemption Date to each Holder of Notes to be
redeemed at his last address as it appears in the Note Register. Notes in
denominations larger than $1,000 may be redeemed in part. On and after the
Redemption Date, interest ceases to accrue on Notes or portions of Notes called
for redemption, unless the Company defaults in the payment of the Redemption
Price.

6.  Repurchase upon a Change of Control.

          Upon the occurrence of any Change of Control, each Holder shall have
the right to require the repurchase of its Notes by the Company in cash pursuant
to the offer described in the Indenture at a purchase price equal to 101% of the
principal amount thereof plus accrued and unpaid interest, if any, to the
Payment Date (the "Change of Control Payment").

          A notice of such Change of Control will be mailed within 30 days after
any Change of Control occurs to each Holder at his last address as it appears in
the Note Register. Notes in denominations larger than $1,000 may be sold to the
Company in part. On and after the Payment Date, interest ceases to accrue on
Notes or portions of Notes surrendered for purchase by the Company, unless the
Company defaults in the payment of the Change of Control Payment.

<PAGE>

7.  Denominations; Transfer; Exchange.

          The Notes are in registered form without coupons in denominations of
$1,000 of principal amount and multiples of $1,000 in excess thereof. A Holder
may register the transfer or exchange of Notes in accordance with the Indenture.
The Registrar may require a Holder, among other things, to furnish appropriate
endorsements and transfer documents and to pay any taxes and fees required by
law or permitted by the Indenture. The Registrar need not register the transfer
or exchange of any Notes selected for redemption. Also, it need not register the
transfer or exchange of any Notes for a period of 15 days before the day of the
mailing of a notice of redemption of Notes selected for redemption.

8.  Persons Deemed Owners.

          A Holder shall be treated as the owner of a Note for all purposes.

9.  Unclaimed Money.

          If money for the payment of principal, premium, if any, or interest
remains unclaimed for two years, the Trustee and the Paying Agent will pay the
money back to the Company at its written request. After that, Holders entitled
to the money must look to the Company for payment, unless an abandoned property
law designates another Person, and all liability of the Trustee and such Paying
Agent with respect to such money shall cease.

10.  Discharge Prior to Redemption or Maturity.

          If the Company deposits with the Trustee money or U.S. Government
Obligations sufficient to pay the then outstanding principal of, premium, if
any, and accrued interest on the Notes (a) to redemption or maturity, the
Company and the Guarantors will be discharged from the Indenture and the Notes,
except in certain circumstances for certain sections thereof, and (b) to the
Stated Maturity, the Company and the Guarantors will be discharged from certain
covenants set forth in the Indenture.

11.  Amendment; Supplement; Waiver.

          Subject to certain exceptions, the Indenture or the Notes may be
amended or supplemented with the consent of the Holders of at least a majority
in principal amount of the Notes then outstanding, and any existing default or
compliance with any provision may be waived with the consent of the Holders of
at least a majority in principal amount of the Notes then outstanding. Without
notice to or the consent of any Holder, the parties thereto may amend or
supplement the Indenture or the Notes to, among other things, cure any
ambiguity, defect or inconsistency and make any change that does not adversely
affect the rights of any Holder.

12.  Restrictive Covenants.

          The Indenture imposes certain limitations on the ability of the
Company and its Restricted Subsidiaries, among other things, to Incur additional
Indebtedness, make Restricted Payments, use the proceeds from Asset Sales,
suffer to exist restrictions on the ability of Restricted

<PAGE>

Subsidiaries to make certain payments to the Company, issue Capital Stock of
Restricted Subsidiaries, engage in transactions with Affiliates, suffer to exist
or incur Liens, engage in certain sale-leaseback transactions, Guarantee
Indebtedness of the Company or merge, consolidate or transfer substantially all
of its assets. Within 90 days after the end of each fiscal year, the Company
shall deliver to the Trustee an Officers' Certificate stating whether or not the
signers know of any Default or Event of Default under such restrictive
covenants.

13.  Successor Persons.

          When a successor person or other entity assumes all the obligations of
its predecessor under the Notes and the Indenture, the predecessor person will
be released from those obligations.

14.  Defaults and Remedies.

          The following events constitute "Events of Default" with respect to
the Notes under the Indenture: (a) the Company or any Guarantor, as the case may
be, defaults in the payment of principal of (or premium, if any, on) any Note
when the same becomes due and payable at Stated Maturity, upon acceleration,
redemption or otherwise; (b) the Company or any Guarantor, as the case may be,
defaults in the payment of interest on any Note when the same becomes due and
payable, and such default continues for a period of 30 days; (c) the Company or
any Guarantor, as the case may be, defaults in the performance or breaches
Article Five or fails to make or consummate an Offer to Purchase in accordance
with Section 4.11 or Section 4.12 of the Indenture; (d) the Company or a
Guarantor defaults in the performance of or breaches any other covenant or
agreement of the Company or a Guarantor in this Indenture or under the Notes
(other than a default specified in clause (a), (b) or (c) above) and such
default or breach continues for a period of 30 consecutive days after written
notice by the Trustee or the Holders of 25% or more in aggregate principal
amount of the Notes; (e) there occurs with respect to any issue or issues of
Indebtedness of the Company, any Guarantor or any Significant Subsidiary having
an outstanding principal amount of $10 million or more in the aggregate for all
such issues of all such Persons, whether such Indebtedness now exists or shall
hereafter be created, (I) an event of default that has caused the holder thereof
to declare such Indebtedness to be due and payable prior to its Stated Maturity
and such Indebtedness has not been discharged in full or such acceleration has
not been rescinded or annulled within 30 days of such acceleration and/or (II)
the failure to make a principal payment at the final (but not any interim) fixed
maturity and such defaulted payment shall not have been made, waived or extended
within 30 days of such payment default; (f) any final judgment or order (not
covered by insurance) for the payment of money in excess of $10 million in the
aggregate for all such final judgments or orders against all such Persons
(treating any deductibles, self-insurance or retention as not so covered) shall
be rendered against the Company, any Guarantor or any Significant Subsidiary and
shall not be paid or discharged, and there shall be any period of 30 consecutive
days during which a stay of enforcement of such final judgment or order, by
reason of a pending appeal or otherwise, shall not be in effect; (g) a court
having jurisdiction in the premises enters a decree or order for (A) relief in
respect of the Company or any Significant Subsidiary in an involuntary case
under any applicable bankruptcy, insolvency or other similar law now or
hereafter in effect, (B) appointment of a receiver, liquidator, assignee,
custodian, trustee, sequestrator or similar official of the Company or any
Significant Subsidiary or for all or substantially all of the property and
assets of the Company or any Significant Subsidiary or (C) the winding up or
liquidation of the affairs of the Company or any Significant Subsidiary and, in
each case, such decree or order shall remain unstayed and in effect for a period
of 30 consecutive days; (h) the Company or any Significant Subsidiary (A)
commences a voluntary case under any applicable bankruptcy, insolvency or other
similar law now or hereafter in effect, or consents to the entry of an order for
relief in an involuntary case under any such law,

<PAGE>

(B) consents to the appointment of or taking possession by a receiver,
liquidator, assignee, custodian, trustee, sequestrator or similar official of
the Company or any Significant Subsidiary or for all or substantially all of the
property and assets of the Company or any Significant Subsidiary or (C) effects
any general assignment for the benefit of creditors; or (i) any Note Guarantee
ceases to be in full force and effect (except pursuant to its terms) or is
declared null and void or any Guarantor denies that it has any further liability
under any Note Guarantee, or gives notice to such effect.

          If an Event of Default, as defined in the Indenture, occurs and is
continuing, the Trustee or the Holders of at least 25% in aggregate principal
amount of the Notes may declare all the Notes to be due and payable. If a
bankruptcy or insolvency default with respect to the Company occurs and is
continuing, the Notes automatically become due and payable. Holders may not
enforce the Indenture or the Notes except as provided in the Indenture. The
Trustee may require indemnity satisfactory to it before it enforces the
Indenture or the Notes. Subject to certain limitations, Holders of at least a
majority in principal amount of the Notes then outstanding may direct the
Trustee in its exercise of any trust or power.

15.  Note Guarantee.

          The Company's obligations under the Notes are fully, unconditionally
and irrevocably guaranteed by each Guarantor.

16. Trustee Dealings with the Company or the Guarantors.

          The Trustee under the Indenture, in its individual or any other
capacity, may make loans to, accept deposits from and perform services for the
Guarantors or the Company or their Affiliates and may otherwise deal with the
Guarantors or the Company or their Affiliates as if it were not the Trustee.

17.  No Recourse Against Others.

          No incorporator or any past, present or future partner, shareholder,
other equity holder, officer, director, employee or controlling person as such,
of the Company or the Guarantors or of any successor Person shall have any
liability for any obligations of the Company or the Guarantors under the Notes
or the Indenture or for any claim based on, in respect of or by reason of, such
obligations or their creation. Each Holder by accepting a Note expressly waives
and releases all such liability. The waiver and release are a condition of, and
part of the consideration for the issuance of the Notes.

18.  Authentication.

          This Note shall not be valid until the Trustee or authenticating agent
signs the certificate of authentication on the other side of this Note.

19.  Abbreviations.

          Customary abbreviations may be used in the name of a Holder or an
assignee, such as: TEN COM (= tenants in common), TEN ENT (= tenants by the
entireties), JT TEN (= joint

<PAGE>

tenants with right of survivorship and not as tenants in common), CUST (=
Custodian) and U/G/M/A (= Uniform Gifts to Minors Act).

          The Company will furnish to any Holder upon written request and
without charge a copy of the Indenture. Requests may be made to Amtran, Inc.,
7337 West Washington Street, Indianapolis, Indiana 46231, Attention: Chief
Financial Officer.

20.  Defeasance

          The Indenture contains provisions for defeasance, at any time, of the
Indebtedness represented by this Note or the covenants governing the
Indebtedness represented by this Note, upon compliance by the Company with
certain conditions set forth in the Indenture.

21.  Holders' Compliance with Registration Rights Agreement

          Each Holder of a Note, by acceptance hereof, acknowledges and agrees
to the provisions of the Registration Rights Agreement, including, without
limitation, the obligations of the Holders with respect to a registration and
the indemnification of the Company and each of the Guarantors to the extent
provided therein.

22.  Governing Law

          THIS NOTE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE
INTERNAL LAWS OF THE STATE OF NEW YORK.

<PAGE>

                            [FORM OF TRANSFER NOTICE]

          FOR VALUE RECEIVED the undersigned registered holder hereby sell(s),
assign(s) and transfer(s) unto

Insert Taxpayer Identification No.

-------------------------------------------------------------------------------
Please print or typewrite name and address including zip code of assignee
-------------------------------------------------------------------------------
the within Note and all rights thereunder, hereby irrevocably constituting and
appointing ----------------------- attorney to transfer said Note on the books
of the Company with full power of substitution in the premises.

                     [THE FOLLOWING PROVISION TO BE INCLUDED
                     ON ALL NOTES OTHER THAN EXCHANGE NOTES,
                      UNLEGENDED OFFSHORE GLOBAL NOTES AND
                       UNLEGENDED OFFSHORE PHYSICAL NOTES]

          In connection with any transfer of this Note occurring prior to the
date which is the earlier of (i) the date the shelf registration statement is
declared effective or (ii) the end of the period referred to in Rule 144(k)
under the Securities Act, the undersigned confirms that without utilizing any
general solicitation or general advertising that:

                                   [Check One]

     [    ] (a) this Note is being transferred in compliance with the exemption
          from registration under the Securities Act of 1933 provided by Rule
          144A thereunder.

                                       or

     [    ] (b) this Note is being transferred other than in accordance with (a)
          above and documents are being furnished which comply with the
          conditions of transfer set forth in this Note and the Indenture.

<PAGE>

If none of the foregoing boxes is checked, the Trustee or other Registrar shall
not be obligated to register this Note in the name of any Person other than the
Holder hereof unless and until the conditions to any such transfer of
registration set forth herein and in Section 2.08 of the Indenture shall have
been satisfied.

Date:  --------------------     -----------------------------------------------
                                NOTICE: The signature to this assignment must
                                correspond with the name as written upon the
                                face of the within- mentioned instrument in
                                every particular, without alteration
                                or any change whatsoever.

TO BE COMPLETED BY PURCHASER IF (a) ABOVE IS CHECKED.

          The undersigned represents and warrants that it is purchasing this
Note for its own account or an account with respect to which it exercises sole
investment discretion and that it and any such account is a "qualified
institutional buyer" within the meaning of Rule 144A under the Securities Act of
1933 and is aware that the sale to it is being made in reliance on Rule 144A and
acknowledges that it has received such information regarding the Company as the
undersigned has requested pursuant to Rule 144A or has determined not to request
such information and that it is aware that the transferor is relying upon the
undersigned's foregoing representations in order to claim the exemption from
registration provided by Rule 144A.

Dated: ------------------

                                 ----------------------------------------------
                                 NOTICE:  To be executed by an executive officer

<PAGE>

                       OPTION OF HOLDER TO ELECT PURCHASE

          If you wish to have this Note purchased by the Company pursuant to
Section 4.11 or Section 4.12 of the Indenture, check the Box: |_|

          If you wish to have a portion of this Note purchased by the Company
pursuant to Section 4.11 or Section 4.12 of the Indenture, state the amount:
$___________________.

Date: _______________________

Your Signature: _______________________________________________________________
              (Sign exactly as your name appears on the other side of this Note)

Signature Guarantee:1  ______________________________

--------

     1    The Holder's signature must be guaranteed by a member firm of a
          registered national securities exchange or of the National Association
          of Securities Dealers, Inc., a commercial bank or trust company having
          an office or correspondent in the United States or an "eligible
          guarantor institution" as defined by Rule 17Ad-15 under the Exchange
          Act.

<PAGE>

                                                                       EXHIBIT B

                               Form of Certificate
                               -------------------

                                                               ____________, ___

First Security Bank, N.A.
79 South Main Street
Salt Lake City, Utah  84111
Attention:  Corporate Trust Services

Re:  Amtran Inc. (the "Company") 10 1/2% Senior Notes due 2004 (the "Notes")
----------------------------------------------------------------------------

Dear Sirs:

          This letter relates to U.S. $ principal amount of Notes represented by
a Note (the "Legended Note") which bears a legend outlining restrictions upon
transfer of such Legended Note. Pursuant to Section 2.02 of the Indenture dated
as of July 24, 1997 (the "Indenture") relating to the Notes, we hereby certify
that we are (or we will hold such securities on behalf of) a person outside the
United States to whom the Notes could be transferred in accordance with Rule 904
of Regulation S promulgated under the U.S. Securities Act of 1933. Accordingly,
you are hereby requested to exchange the legended certificate for an unlegended
certificate representing an identical principal amount of Notes, all in the
manner provided for in the Indenture.

          You and the Company are entitled to rely upon this letter and are
irrevocably authorized to produce this letter or a copy hereof to any interested
party in any administrative or legal proceedings or official inquiry with
respect to the matters covered hereby. Terms used in this certificate have the
meanings set forth in Regulation S.

                                          Very truly yours,

                                          [Name of Holder]

                                          By: _________________________________
                                              Authorized Signature

<PAGE>

                                                                       EXHIBIT C

                            Form of Certificate to Be
                          Delivered in Connection with
                    Transfers to Non-QIB Accredited Investors

                                                          _________________, ___

First Security Bank, N.A.
79 South Main Street
Salt Lake City, Utah  84111
Attention:  Corporate Trust Services

Re:  Amtran, Inc. (the "Company") 10 1/2% Senior Notes due 2004 (the "Notes")
-----------------------------------------------------------------------------

Dear Sirs:

          In connection with our proposed purchase of $_______________ aggregate
principal amount of the Notes, we confirm that:

          1. We understand that any subsequent transfer of the Notes is subject
to certain restrictions and conditions set forth in the Indenture dated as of
July [ ], 1997 (the "Indenture"), relating to the Notes, and the undersigned
agrees to be bound by, and not to resell, pledge or otherwise transfer the Notes
except in compliance with, such restrictions and conditions and the Securities
Act of 1933 (the "Securities Act").

          2. We understand that the offer and sale of the Notes have not been
registered under the Securities Act, and that the Notes may not be offered or
sold except as permitted in the following sentence. We agree, on our own behalf
and on behalf of any accounts for which we are acting as hereinafter stated,
that if we should sell any Notes, we will do so only (A) to the Company or any
subsidiary thereof, (B) in accordance with Rule 144A under the Securities Act to
a "qualified institutional buyer" (as defined therein), (C) to an institutional
"accredited investor" (as defined below) that, prior to such transfer, furnishes
(or has furnished on its behalf by a U.S. broker-dealer) to you and to the
Company a signed letter substantially in the form of this letter, (D) outside
the United States in accordance with Rule 904 of Regulation S under the
Securities Act, (E) pursuant to the exemption from registration provided by Rule
144 under the Securities Act, or (F) pursuant to an effective registration
statement under the Securities Act, and we further agree to provide to any
person purchasing any of the Notes from us a notice advising such purchaser that
resales of the Notes are restricted as stated herein.

          3. We understand that, on any proposed resale of any Notes, we will be
required to furnish to you and the Company such certifications, legal opinions
and other information as you and the Company may reasonably require to confirm
that the proposed sale complies with the foregoing restrictions. We further
understand that the Notes purchased by us will bear a legend to the foregoing
effect.

<PAGE>

          4. We are an institutional "accredited investor" (as defined in Rule
501(a)(1), (2), (3) or (7) of Regulation D under the Securities Act) and have
such knowledge and experience in financial and business matters as to be capable
of evaluating the merits and risks of our investment in the Notes, and we and
any accounts for which we are acting are each able to bear the economic risk of
our or its investment.

          5. We are acquiring the Notes purchased by us for our own account or
for one or more accounts (each of which is an institutional "accredited
investor") as to each of which we exercise sole investment discretion.

          You and the Company are entitled to rely upon this letter and are
irrevocably authorized to produce this letter or a copy hereof to any interested
party in any administrative or legal proceedings or official inquiry with
respect to the matters covered hereby.

                                          Very truly yours,

                                          [Name of Transferee]

                                          By: _______________________________
                                              Authorized Signature

<PAGE>

                                                                       EXHIBIT D

                       Form of Certificate to Be Delivered
                          in Connection with Transfers
                            Pursuant to Regulation S

                                                           _________________, __

First Security Bank, N.A.
79 South Main Street
Salt Lake City, Utah  84111
Attention:  Corporate Trust Services

Re:  Amtran, Inc. (the "Company") 10 1/2% Senior Notes due 2004 (the "Notes")
-----------------------------------------------------------------------------

Dear Sirs:

          In connection with our proposed sale of U.S.$ aggregate principal
amount of the Notes, we confirm that such sale has been effected pursuant to and
in accordance with Regulation S under the Securities Act of 1933 and,
accordingly, we represent that:

          (1) the offer of the Notes was not made to a person in the United
States;

          (2) at the time the buy order was originated, the transferee was
outside the United States or we and any person acting on our behalf reasonably
believed that the transferee was outside the United States;

          (3) no directed selling efforts have been made by us in the United
States in contravention of the requirements of Rule 903(b) or Rule 904(b) of
Regulation S, as applicable; and

          (4) the transaction is not part of a plan or scheme to evade the
registration requirements of the U.S. Securities Act of 1933.

          You and the Company are entitled to rely upon this letter and are
irrevocably authorized to produce this letter or a copy hereof to any interested
party in any administrative

<PAGE>

or legal proceedings or official inquiry with respect to the matters covered
hereby. Terms used in this certificate have the meanings set forth in Regulation
S.

                                          Very truly yours,

                                          [Name of Transferor]

                                          By: ______________________________
                                              Authorized Signature

<PAGE>

                      ====================================

                                  AMTRAN, INC.,
                                          as Issuer

                                       and

                          THE GUARANTORS NAMED HEREIN,
                                          as Guarantors

                                       and

                           FIRST SECURITY BANK, N.A.,
                                          as Trustee

                              ____________________

                                    Indenture

                            Dated as of July 24, 1997

                              ____________________

                          10 1/2% Senior Notes due 2004

                      ====================================

<PAGE>

                              CROSS-REFERENCE TABLE

TIA Sections
------------
                                                      Indenture Sections
                                                      ------------------

ss. 310(a)(1).............................                 7.09
       (a)(2) ............................                 7.09
       (b)................................                 7.02; 7.07
ss. 311(a)................................                 7.02
       (b)................................                 7.02
ss. 312(a)................................                 2.03
ss. 313(a)................................                 7.05
       (c)................................                 7.04; 7.05; 11.02
       (d)................................                 7.05
ss. 314(a)................................                 4.17; 7.04; 11.02
       (a)(4).............................                 4.16; 11.02
       (c)(1).............................                11.03
       (c)(2).............................                11.03
       (e)................................                 4.16; 11.04
ss. 315(a)................................                 7.01
       (b)................................                 7.04; 11.02
       (c)................................                 7.01
       (d)................................                 7.01
       (e)................................                 6.11
ss. 316(a)(1)(A)..........................                 6.05
       (a)(1)(B)..........................                 6.04
       (b)................................                 6.07
       (c)................................                 9.03
ss. 317(a)(1).............................                 6.08
       (a)(2).............................                 6.09
       (b)................................                 2.04
ss. 318(a)................................                11.01
       (c)................................                11.01

Note:  The Cross-Reference Table shall not for any purpose be deemed to be a
       part of the Indenture.

<PAGE>

                               TABLE OF CONTENTS*

                                                                            Page

RECITALS OF THE COMPANY......................................................  1

                                   ARTICLE ONE
                   DEFINITIONS AND INCORPORATION BY REFERENCE

SECTION 1.01.  Definitions...................................................  1
SECTION 1.02.  Incorporation by Reference of Trust Indenture Act............. 20
SECTION 1.03.  Rules of Construction......................................... 21

                                   ARTICLE TWO
                                    THE NOTES

SECTION 2.01.  Form and Dating............................................... 22
SECTION 2.02.  Restrictive Legends........................................... 23
SECTION 2.03.  Execution, Authentication and Denominations................... 25
SECTION 2.04.  Registrar and Paying Agent.................................... 25
SECTION 2.05.  Paying Agent to Hold Money in Trust........................... 26
SECTION 2.06.  Transfer and Exchange......................................... 27
SECTION 2.07.  Book-Entry Provisions for Global Notes........................ 28
SECTION 2.08.  Special Transfer Provisions................................... 29
SECTION 2.09.  Replacement Notes............................................. 32
SECTION 2.10.  Outstanding Notes............................................. 33
SECTION 2.11.  Temporary Notes............................................... 34
SECTION 2.12.  Cancellation.................................................. 34
SECTION 2.13.  CUSIP Numbers................................................. 34
SECTION 2.14.  Defaulted Interest............................................ 34
SECTION 2.15.  Issuance of Additional Notes.................................. 35

                                  ARTICLE THREE
                                   REDEMPTION

SECTION 3.01.  Right of Redemption........................................... 35
SECTION 3.02.  Notices to Trustee............................................ 36
SECTION 3.03.  Selection of Notes to Be Redeemed............................. 36
SECTION 3.04.  Notice of Redemption.......................................... 36
SECTION 3.05.  Effect of Notice of Redemption................................ 37
SECTION 3.06.  Deposit of Redemption Price................................... 38
SECTION 3.07.  Payment of Notes Called for Redemption........................ 38
SECTION 3.08.  Notes Redeemed in Part........................................ 38

                                  ARTICLE FOUR
                                    COVENANTS

____________________________
   * Note:        The Table of Contents shall not for any purposes be deemed to
                  be a part of the Indenture.

<PAGE>

                                                                            Page

SECTION 4.01.  Payment of Notes.............................................. 38
SECTION 4.02.  Maintenance of Office or Agency............................... 39
SECTION 4.03.  Limitation on Indebtedness.................................... 39
SECTION 4.04.  Limitation on Restricted Payments............................. 41
SECTION 4.05.  Limitation on Dividend and Other Payment Restrictions
               Affecting Restricted Subsidiaries............................. 44
SECTION 4.06.  Limitation on the Issuance and Sale of Capital Stock of
               Restricted Subsidiaries....................................... 45
SECTION 4.07.  Limitation on Issuances of Guarantees by Restricted
               Subsidiaries.................................................. 45
SECTION 4.08.  Limitation on Transactions with Shareholders and Affiliates... 46
SECTION 4.09.  Limitation on Liens........................................... 46
SECTION 4.10.  Limitation on Sale-Leaseback Transactions..................... 47
SECTION 4.11.  Limitation on Asset Sales..................................... 47
SECTION 4.12.  Repurchase of Notes upon a Change of Control.................. 49
SECTION 4.13.  Existence..................................................... 49
SECTION 4.14.  Payment of Taxes and Other Claims............................. 49
SECTION 4.15.  Maintenance of Properties and Insurance....................... 49
SECTION 4.16.  Compliance Certificates....................................... 50
SECTION 4.17.  Commission Reports and Reports to Holders..................... 50
SECTION 4.18.  Waiver of Stay, Extension or Usury Laws....................... 50

                                  ARTICLE FIVE
                              SUCCESSOR CORPORATION

SECTION 5.01.  When Company May Merge, Etc................................... 51
SECTION 5.02.  Successor Substituted......................................... 52

                                   ARTICLE SIX
                              DEFAULT AND REMEDIES

SECTION 6.01.  Events of Default............................................. 52
SECTION 6.02.  Acceleration.................................................. 54
SECTION 6.03.  Other Remedies................................................ 55
SECTION 6.04.  Waiver of Past Defaults....................................... 55
SECTION 6.05.  Control by Majority........................................... 55
SECTION 6.06.  Limitation on Suits........................................... 55
SECTION 6.07.  Rights of Holders to Receive Payment.......................... 56
SECTION 6.08.  Collection Suit by Trustee.................................... 56
SECTION 6.09.  Trustee May File Proofs of Claim.............................. 56
SECTION 6.10.  Priorities.................................................... 57
SECTION 6.11.  Undertaking for Costs......................................... 57
SECTION 6.12.  Restoration of Rights and Remedies............................ 58
SECTION 6.13.  Rights and Remedies Cumulative................................ 58
SECTION 6.14.  Delay or Omission Not Waiver.................................. 58

                                  ARTICLE SEVEN
                                     TRUSTEE

SECTION 7.01.  Rights and Duties of Trustee.................................. 58
SECTION 7.02.  Individual Rights of Trustee.................................. 61
SECTION 7.03.  Trustee's Disclaimer.......................................... 61

<PAGE>

                                                                            Page

SECTION 7.04.  Notice of Default............................................ 61
SECTION 7.05.  Reports by Trustee to Holders................................ 62
SECTION 7.06.  Compensation and Indemnity................................... 62
SECTION 7.07.  Replacement of Trustee....................................... 63
SECTION 7.08.  Successor Trustee by Merger, Etc............................. 64
SECTION 7.09.  Eligibility; Disqualification................................ 64
SECTION 7.10.  Money Held in Trust.......................................... 64
SECTION 7.11.  Preferential Collection of Claims Against Company............ 64

                                  ARTICLE EIGHT
                             DISCHARGE OF INDENTURE

SECTION 8.01.  Termination of Company's Obligations.......................... 65
SECTION 8.02.  Defeasance and Discharge of Indenture......................... 66
SECTION 8.03.  Defeasance of Certain Obligations............................. 68
SECTION 8.04.  Application of Trust Money.................................... 69
SECTION 8.05.  Repayment to Company.......................................... 69
SECTION 8.06.  Reinstatement................................................. 70

                                  ARTICLE NINE
                       AMENDMENTS, SUPPLEMENTS AND WAIVERS

SECTION 9.01.  Without Consent of Holders................................... 70
SECTION 9.02.  With Consent of Holders...................................... 71
SECTION 9.03.  Revocation and Effect of Consent............................. 72
SECTION 9.04.  Notation on or Exchange of Notes............................. 72
SECTION 9.05.  Trustee to Sign Amendments, Etc.............................. 73
SECTION 9.06.  Conformity with Trust Indenture Act.......................... 73

                                   ARTICLE TEN
                               GUARANTEE OF NOTES

SECTION 10.01.  Note Guarantee............................................... 73
SECTION 10.02.  Obligations Unconditional.................................... 75
SECTION 10.03.  Notice to Trustee............................................ 75
SECTION 10.04.  This Article Not to Prevent Events of Default................ 75
SECTION 10.05.  Net Worth Limitation......................................... 75

                                 ARTICLE ELEVEN
                                  MISCELLANEOUS

SECTION 11.01.  Trust Indenture Act of 1939.................................. 76
SECTION 11.02.  Notices...................................................... 76
SECTION 11.03.  Certificate and Opinion As to Conditions Precedent........... 77
SECTION 11.04.  Statements Required in Certificate or Opinion................ 77
SECTION 11.05.  Acts of Holders.............................................. 78
SECTION 11.06.  Rules by Trustee, Paying Agent or Registrar.................. 79
SECTION 11.07.  Payment Date Other Than a Business Day....................... 79
SECTION 11.08.  Governing Law................................................ 79
SECTION 11.09.  No Adverse Interpretation of Other Agreements................ 79
SECTION 11.10.  No Recourse Against Others................................... 79
SECTION 11.11.  Successors................................................... 80

<PAGE>

                                                                            Page

SECTION 11.12.  Duplicate Originals......................................... 80
SECTION 11.13.  Separability................................................ 80
SECTION 11.14.  Table of Contents, Headings, Etc............................ 80

                                 ARTICLE TWELVE
                               MEETINGS OF HOLDERS

SECTION 12.01.  Purposes for Which Meetings May Be Called.................... 80
SECTION 12.02.  Manner of Calling Meetings................................... 81
SECTION 12.03.  Call of Meetings by the Company or Holders................... 81
SECTION 12.04.  Who May Attend and Vote at Meetings.......................... 81
SECTION 12.05.  Quorum; Action............................................... 81
SECTION 12.06.  Regulations May Be Made by Trustee; Conduct of the
                Meeting; Voting Rights; Adjournment.......................... 82
SECTION 12.07.  Voting at the Meeting and Record to Be Kept.................. 83
SECTION 12.08.  Exercise of Rights of Trustee or Holders May Not Be
                Hindered or Delayed by Call of Meeting....................... 83
SECTION 12.09.  Procedures Not Exclusive..................................... 84

SIGNATURES

EXHIBIT A    Form of Note
EXHIBIT B    Form of Certificate

EXHIBIT C    Form of Certificate to Be Delivered in Connection with Transfers to
             Non-QIB Accredited Investors

EXHIBIT D    Form of Certificate to Be Delivered in Connection with Transfers
             Pursuant to Regulation SExhibit 4.1

                         FIRST SUPPLEMENTAL INDENTURE (this "First
                    Supplemental Indenture") dated as of December 21, 1999,
                    among AMTRAN, INC., an Indiana corporation, as issuer (the
                    "Company"), American Trans Air, Inc., Ambassadair Travel
                    Club, Inc., ATA Leisure Corp. (formerly known as ATA
                    Vacations, Inc.), Amber Travel, Inc., American Trans Air
                    Training Corporation, American Trans Air Execujet, Inc.,
                    Amber Air Freight Corporation (each, an Indiana
                    corporation) (the "Original Guarantors") and Chicago
                    Express Airlines, Inc., (a Georgia Corporation), ("Chicago
                    Express" and together with the Original Guarantors, the
                    "Guarantors"), as guarantors and First Security Bank,
                    N.A., a national banking association, as trustee (the
                    "Trustee").

          WHEREAS each of the Company, the Original Guarantors and the Trustee
have heretofore executed and delivered to the Trustee an Indenture (the
"Indenture"), dated as of July 24, 1997, providing for the issuance of the
Company's 10 1/2% Senior Notes due 2004 (the "Notes", which term shall include
any additional notes (the "Additional Notes") issued under the Indenture as
supplemented hereby on or after the date hereof;

          WHEREAS Section 2.03 of the Indenture provides that subject to
Article Four the aggregate principal amount of Notes which may be
authenticated and delivered under the Indenture is unlimited;

          WHEREAS Section 2.15 of the Indenture permits the Company, subject
to certain conditions, to issue Additional Notes under the Indenture which,
together with the Notes issued heretofore, shall be treated as a single class
for all purposes under the Indenture;

          WHEREAS Section 9.01(1) of the Indenture provides that without
notice to or the consent of any Holders, the Company and the Guarantors, when
authorized by a resolution of their Board of Directors, and the Trustee may
amend or supplement the Indenture to cure any ambiguity, defect or
inconsistency and Section 9.01(7) of the Indenture provides that without
notice to or the consent of any Holders, the Company and the Guarantors, when
authorized by a resolution of their Board of Directors, and the Trustee may
amend or supplement the Indenture to make any change that does not

<PAGE>

                                                                             2

adversely affect the rights of any Holder in any material
respect;

          WHEREAS the purpose of this First Supplemental Indenture is (i) to
make conforming adjustments to the Indenture with respect to the issuance of
Additional Notes as contemplated by Section 2.15 of the Indenture and (ii) to
cause Chicago Express Airlines, Inc. to provide a Subsidiary Guarantee of the
Notes containing the same provisions as those contemplated by Section 4.07 of
the Indenture; and

          WHEREAS the Company has requested that the Trustee execute and
deliver this First Supplemental Indenture and all requirements necessary to
make this First Supplemental Indenture a valid instrument in accordance with
its terms, and the execution and delivery of this First Supplemental Indenture
have been duly authorized in all respects.

          NOW THEREFORE, the Company, the Guarantors and the Trustee hereby
agree that the following Sections of this First Supplemental Indenture
supplement and amend the Indenture with respect to the issuance of Additional
Notes proposed to be issued thereunder on or after the date of this First
Supplemental Indenture:

          SECTION 1. Definitions. (a) Capitalized terms used herein and not
defined herein have the meanings ascribed to such terms in the Indenture.

          (b) Solely for purposes of this First Supplemental Indenture and any
Additional Notes originally issued under the Indenture on or after the date of
this First Supplemental Indenture, the following terms shall have the
indicated meanings (such meanings shall apply equally to both the singular and
plural forms of the respective terms):

          "Closing Date", solely for the purposes of Section 2.03 with respect
to Additional Notes, means the date on which any Additional Notes are
originally issued under the Indenture on or after the date of this First
Supplemental Indenture.

          "Exchange Notes" means any securities of the Company containing
terms identical to the Notes (except that such Exchange Notes shall be
registered under the Securities Act) that are issued and exchanged for the
Notes pursuant to a Registration Rights Agreement and the Indenture.

          "Guarantors" means American Trans Air, Inc., Ambassadair Travel
Club, Inc., ATA Leisure Corp. (formerly

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                                                                             3

known as ATA Vacations, Inc.), Amber Travel, Inc., American Trans Air Training
Corporation, American Trans Air Execujet, Inc. and Amber Air Freight
Corporation (each, an Indiana corporation) and Chicago Express, until a
successor replaces any Guarantor pursuant to Article Five of the Indenture and
thereafter means the successor of such Guarantor, and any Restricted
Subsidiary that executes a Subsidiary Guarantee.

          "Registration Rights Agreement" means a registration rights
agreement, among the Company, the Guarantors and one or more investment banks
that act as initial purchasers in the distribution of Notes, including the
Registration Rights Agreement dated as of December 21, 1999 between the
Company, the Guarantors and Deutsche Bank Securities Inc.

          "Registration Statement" means a Registration Statement as defined
and described in a Registration Rights Agreement.

          "Shelf Registration Statement" has the meaning provided in a
Registration Rights Agreement.

          SECTION 2. Payment of Interest. Whenever Additional Notes are issued
that will constitute restricted securities under the Securities Act of 1933,
interest on such Additional Notes will accrue from the date of original issue
of such Additional Notes. Certificates representing such Additional Notes may
bear a legend to the foregoing effect.

          SECTION 3. Subsidiary Guarantee. (a) Pursuant to Section 4.07,
Chicago Express, a Restricted Subsidiary of the Company, hereby provides a
Subsidiary Guarantee of payment of the Notes as set forth below.

          (b) Subject to the provisions of this Section 3, Chicago Express, as
primary obligor and not merely as surety, hereby fully, unconditionally and
irrevocably guarantees on a senior basis to each Holder and to the Trustee on
behalf of the Holders (a "Subsidiary Guarantee"): (i) the due and punctual
payment of the principal of, premium, if any, on and interest on each Note,
when and as the same shall become due and payable, whether, by acceleration,
required repurchase (including by reason of Change of Control), call for
redemption or otherwise, the due and punctual payment of interest on the
overdue principal of and interest, if any, on the Notes, to the extent lawful
(in each case including interest accruing on or after filing of any petition
in bankruptcy or reorganization relating to the Company or any Guarantor,

<PAGE>

                                                                             4

whether or not a claim for post filing interest is allowed in such
proceeding), and the due and punctual performance of all other obligations of
the Company to the Holders or the Trustee, all in accordance with the terms of
such Note and the Indenture and (ii) in the case of any extension of time of
payment or renewal of any Note or any of such other obligations, that the same
will be promptly paid in full when due or performed in accordance with the
terms of the extension or renewal, at Stated Maturity, by acceleration,
required repurchase (including by reason of Change of Control), call for
redemption or otherwise. Chicago Express hereby waives diligence, presentment,
demand of payment, filing of claims with a court in the event of merger or
bankruptcy of the Company, any right to require a proceeding first against the
Company, the benefit of discussion, protest or notice with respect to any such
Note or the debt evidenced thereby and all demands whatsoever, and covenants
that this Subsidiary Guarantee will not be discharged as to any such Note
except by payment in full of the principal thereof and interest thereon and as
provided in Section 8.01 and Section 8.02 (subject to Section 8.06) of the
Indenture. The obligations of Chicago Express hereunder shall not be affected
by any failure or delay of the Trustee to exercise any right or remedy under
this First Supplemental Indenture, the Indenture, the Notes or this Subsidiary
Guarantee. The maturity of the obligations guaranteed hereby may be
accelerated as provided in Article Six of the Indenture for the purposes of
this Section 3. In the event of any declaration of acceleration of such
obligations as provided in Article Six of the Indenture, such obligations
(whether or not due and payable) shall forthwith become due and payable by the
Guarantors for the purpose of this Section 3. In addition, without limiting
the foregoing provisions, upon the effectiveness of an acceleration under
Article Six of the Indenture, the Trustee shall promptly make a demand for
payment on the Notes under the Subsidiary Guarantee provided for in this
Section 3.

          The Subsidiary Guarantee shall remain in full force and effect and
continue to be effective should any petition be filed by or against the
Company for liquidation or reorganization, should the Company become insolvent
or make an assignment for the benefit of creditors or should a receiver or
trustee be appointed for all or any significant portion of the Company's
assets, and if the Trustee or the Holder of any Note is required by any court
or otherwise to return to the Company or any Guarantor, or any custodian,
receiver, liquidator, trustee, sequestrator or other similar official acting
in relation to the Company or the Guarantors, any amount paid to the Trustee
or such Holder in respect of a Note, this Subsidiary Guarantee, to the extent

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                                                                             5

theretofore discharged, shall continue to be effective or be reinstated in
full force and effect, as the case may be, all as though such payment has not
been made. Chicago Express further agrees, to the fullest extent that it may
lawfully do so, that, as between the Guarantors, on the one hand, and the
Holders and the Trustee, on the other hand, the maturity of the obligations
guaranteed hereby may be accelerated as provided in Article Six of the
Indenture for the purposes of this Subsidiary Guarantee, notwithstanding any
stay, injunction or other prohibition extant under any applicable bankruptcy
law preventing such acceleration in respect of the obligations Guaranteed
hereby.

          Chicago Express hereby irrevocably waives any claim or other rights
which it may now or hereafter acquire against the Company that arise from the
existence, payment, performance or enforcement of its obligations under this
Subsidiary Guarantee and the Indenture, including, without limitation, any
right of subrogation, reimbursement, exoneration, contribution,
indemnification, any right to participate in any claim or remedy of the
Holders against the Company or any collateral which any such Holder or the
Trustee on behalf of such Holder hereafter acquires, whether or not such
claim, remedy or right arises in equity, or under contract, statute or common
law, including, without limitation, the right to take or receive from the
Company, directly or indirectly, in cash or other property or by set-off or in
any other manner, payment or security on account of such claim or other rights
until such time as the Notes and all of the Company's other obligations being
guaranteed hereby shall have been indefeasibly paid in full. If any amount
shall be paid to the Guarantors in violation of the preceding sentence and the
principal of, premium, if any, and accrued interest on the Notes shall not
have been paid in full, such amount shall be deemed to have been paid to the
Guarantors for the benefit of, and held in trust for the benefit of, the
Holders, and shall forthwith be paid to the Trustee for the benefit of the
Holders to be credited and applied upon the principal of, premium, if any, and
accrued interest on the Notes. Each of the Guarantors acknowledges that it
will receive direct and indirect benefits from the issuance of the Notes
pursuant to the Indenture and that the waivers set forth in this Section 3 are
knowingly made in contemplation of such benefits.

          The Subsidiary Guarantee set forth in this Section 3 shall not be
valid or become obligatory for any purpose with respect to a Note until the
certificate of authentication on such Note shall have been signed by or on
behalf of the Trustee.

<PAGE>

                                                                             6

          (c) Subject to Section 3(f), nothing contained in this Section 3 or
elsewhere in the Indenture or in the Notes is intended to or shall impair, as
among any Guarantor and the Holders, the obligation of such Guarantor, which
is absolute, unconditional and irrevocable, upon failure by the Company, to
pay to the Holders the principal of, premium, if any, and interest on the
Notes as and when the same shall become due and payable in accordance with
their terms, or is intended to or shall affect the relative rights of the
Holders and creditors of such Guarantor, nor shall anything herein or therein
prevent the Holder of any Note or the Trustee on their behalf from exercising
all remedies otherwise permitted by applicable law upon default under this
Indenture.

          Without limiting the foregoing, nothing contained in this Section 3
will restrict the right of the Trustee or the Holders to take any action to
declare the Subsidiary Guarantee to be due and payable prior to the Stated
Maturity of the Notes pursuant to Section 6.02 of the Indenture or to pursue
any rights or remedies hereunder.

          (d) Chicago Express shall give prompt written notice to the Trustee
of any fact known to it which would prohibit the making of any payment to or
by the Trustee in respect of the Subsidiary Guarantee pursuant to the
provisions of this Section 3.

          (e) The failure to make a payment on account of principal of,
premium, if any, or interest on the Notes by reason of any provision of this
Section 3 will not be construed as preventing the occurrence of an Event of
Default.

          (f) Notwithstanding any other provision of the Indenture or the
Notes, the Subsidiary Guarantee shall not be enforceable against Chicago
Express in an amount in excess of the net worth of Chicago Express at the time
that determination of such net worth is, under applicable law, relevant to the
enforceability of the Subsidiary Guarantee. Such net worth shall include any
claim of any Subsidy against the Company for reimbursement and any claim
against any grantor of a Subsidiary Guarantee or Note Guarantee for
contribution.

          (g) Notwithstanding any other provision of the Indenture or the
Notes, this Subsidiary Guarantee shall be automatically and unconditionally
released and discharged upon (i) any sale, exchange or transfer, to any Person
not an Affiliate of the Company, of all of the Company's and each Restricted
Subsidiary's Capital Stock in, or all or

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                                                                             7

substantially all the assets of, such Restricted Subsidiary (which sale,
exchange or transfer is not prohibited by the Indenture) or (ii) the release
or discharge of the Guarantee which resulted in the creation of this
Subsidiary Guarantee, except a discharge or release by or as a result of
payment under such Guarantee.

SECTION 4. Additional Interest; Legends. Unless and until a Note is exchanged
for an Exchange Note pursuant to a Registration Rights Agreement, each Note
shall bear the legend set forth below on the face thereof.

          IF (I) THE SHELF REGISTRATION STATEMENT OR EXCHANGE OFFER
REGISTRATION STATEMENT, AS APPLICABLE UNDER THE REGISTRATION RIGHTS AGREEMENT,
IS NOT FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON OR PRIOR TO 45
DAYS AFTER THE CLOSING DATE, (II) THE EXCHANGE OFFER REGISTRATION STATEMENT OR
THE SHELF REGISTRATION STATEMENT, AS THE CASE MAY BE, IS NOT DECLARED
EFFECTIVE WITHIN 150 DAYS AFTER THE CLOSING DATE, (III) THE REGISTERED
EXCHANGE OFFER IS NOT CONSUMMATED ON OR PRIOR TO THE 30TH DAY AFTER THE DATE
ON WHICH THE EXCHANGE OFFER REGISTRATION STATEMENT WAS DECLARED EFFECTIVE, OR
(IV) THE SHELF REGISTRATION STATEMENT IS FILED AND DECLARED EFFECTIVE BUT
SHALL THEREAFTER CEASE TO BE EFFECTIVE AT ANY TIME PRIOR TO THE SECOND
ANNIVERSARY OF ITS EFFECTIVE DATE (OTHER THAN AFTER SUCH TIME AS ALL NOTES
HAVE BEEN DISPOSED OF)IN ACCORDANCE WITH THE TERMS OF THE REGISTRATION RIGHTS
AGREEMENT, THEN ADDITIONAL INTEREST ("ADDITIONAL INTEREST") SHALL ACCRUE ON
THE PRINCIPAL AMOUNT OF THIS NOTE, (A) IN THE CASE OF (I) ABOVE, COMMENCING ON
THE DAY AFTER EITHER SUCH REQUIRED FILING DATE, AT A RATE OF .50% PER ANNUM
FOR THE FIRST 90 DAYS IMMEDIATELY FOLLOWING EACH SUCH FILING DATE, SUCH
ADDITIONAL INTEREST INCREASING BY AN ADDITIONAL 0.50% PER ANNUM AT THE
BEGINNING OF EACH SUBSEQUENT 90-DAY PERIOD; (B) IN THE CASE OF (II) ABOVE,
COMMENCING ON THE DAY AFTER EITHER SUCH REQUIRED EFFECTIVE DATE, AT A RATE OF
 .50% PER ANNUM FOR THE FIRST 90 DAYS IMMEDIATELY FOLLOWING EACH SUCH FILING
DATE, SUCH ADDITIONAL INTEREST INCREASING BY AN ADDITIONAL 0.50% PER ANNUM AT
THE BEGINNING OF EACH SUBSEQUENT 90-DAY PERIOD; (C) IN THE CASE OF (III)
ABOVE, COMMENCING ON THE 31ST DAY AFTER SUCH EFFECTIVE DATE, AT A RATE OF .50%
PER ANNUM FOR THE FIRST 90 DAYS IMMEDIATELY FOLLOWING EACH SUCH FILING DATE,
SUCH ADDITIONAL INTEREST INCREASING BY AN ADDITIONAL 0.50% PER ANNUM AT THE
BEGINNING OF EACH SUBSEQUENT 90-DAY PERIOD; OR (D) IN THE CASE OF (IV) ABOVE,
COMMENCING ON THE DAY AFTER SUCH SHELF REGISTRATION STATEMENT CEASES TO BE
EFFECTIVE, AT A RATE OF .50% PER ANNUM FOR THE FIRST 90 DAYS IMMEDIATELY
FOLLOWING EACH SUCH FILING DATE, SUCH ADDITIONAL INTEREST INCREASING BY AN
ADDITIONAL 0.50% PER ANNUM AT THE BEGINNING OF EACH SUBSEQUENT 90-DAY PERIOD;
PROVIDED, HOWEVER, THAT

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                                                                             8

THE ADDITIONAL INTEREST RATE ON THE NOTES MAY NOT EXCEED IN THE AGGREGATE
2.0%; PROVIDED FURTHER, HOWEVER, THAT ANY AND ALL AMOUNTS OF ADDITIONAL
INTEREST PAID IN ACCORDANCE WITH SECTION 1 OF THIS NOTE SHALL BE CREDITED
AGAINST THE ADDITIONAL INTEREST SET FORTH ABOVE.

          SECTION 5. This First Supplemental Indenture. This First
Supplemental Indenture shall be construed as supplemental to the Indenture and
shall form a part of it, and the Indenture is hereby incorporated by reference
herein and each is hereby ratified, approved and confirmed.

          SECTION 6. GOVERNING LAW. THIS FIRST SUPPLEMENTAL INDENTURE SHALL BE
GOVERNED AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

          SECTION 7. Counterparts. This First Supplemental Indenture may be
executed in two or more counterparts, each of which shall constitute an
original, but all of which when taken together shall constitute but one
instrument.

          SECTION 8. Headings. The headings of this First Supplemental
Indenture are for reference only and shall not limit or otherwise affect the
meaning hereof.

          SECTION 9. Trustee Not Responsible for Recitals. The recitals herein
contained are made by the Company and not by the Trustee, and the Trustee
assumes no responsibility for the correctness thereof. The Trustee shall not
be responsible in any manner whatsoever for or in respect of the validity or
sufficiency of this First Supplemental Indenture.

          SECTION 10. Separability. In case any one or more of the provisions
contained in this First Supplemental Indenture shall for any reason be held to
be invalid, illegal or unenforceable in any respect, such invalidity,
illegality or unenforceability shall not affect any other provisions of this
First Supplemental Indenture, but this First Supplemental Indenture shall be
construed as if such invalid or illegal or unenforceable provision had never
been contained herein.

          IN WITNESS WHEREOF, the parties hereto have caused this First
Supplemental Indenture to be duly executed by their respective authorized
officers as of the date first written above.

<PAGE>

                                                                             9

                                             AMTRAN, INC.,
                                                as Issuer,

                                                by: /s/ Kenneth K. Wolff
                                                    ---------------------------
                                                      Name:  Kenneth K. Wolff
                                                      Title: Executive Vice
                                                             President & CFO

                                             AMERICAN TRANS AIR, INC.,
                                                as Guarantor,

                                                by: /s/ Kenneth K. Wolff
                                                    ---------------------------
                                                      Name:  Kenneth K. Wolff
                                                      Title: Executive Vice
                                                             President & CFO

                                             AMBASSADAIR TRAVEL CLUB, INC.,
                                                as Guarantor,

                                                by: /s/ Kenneth K. Wolff
                                                    ---------------------------
                                                      Name:  Kenneth K. Wolff
                                                      Title: Executive Vice
                                                             President & CFO

                                             ATA LEISURE CORP. (formerly known
                                             as ATA VACATIONS, INC.),
                                                 as Guarantor,

                                                by: /s/ Kenneth K. Wolff
                                                    ---------------------------
                                                      Name:  Kenneth K. Wolff
                                                      Title: Executive Vice
                                                             President & CFO

                                             AMBER TRAVEL, INC.,
                                               as Guarantor

                                                by: /s/ Kenneth K. Wolff
                                                    ---------------------------
                                                      Name:  Kenneth K. Wolff
                                                      Title: Executive Vice
                                                             President & CFO

<PAGE>

                                                                            10

                                             AMERICAN TRANS AIR TRAINING
                                             CORPORATION,
                                                as Guarantor,

                                                by: /s/ Kenneth K. Wolff
                                                    ---------------------------
                                                      Name:  Kenneth K. Wolff
                                                      Title: Executive Vice
                                                             President & CFO

                                             AMERICAN TRANS AIR EXECUJET, INC.,
                                                as Guarantor,

                                                by: /s/ Kenneth K. Wolff
                                                    ---------------------------
                                                      Name:  Kenneth K. Wolff
                                                      Title: Executive Vice
                                                             President & CFO

                                             AMBER AIR FREIGHT CORPORATION,
                                                as Guarantor,

                                                by: /s/ Kenneth K. Wolff
                                                    --------------------------
                                                      Name:  Kenneth K. Wolff
                                                      Title: Executive Vice
                                                             President & CFO

                                             CHICAGO EXPRESS AIRLINES, INC.,
                                                as Guarantor,

                                                by: /s/ Stephen Cooper
                                                    ---------------------------
                                                      Name:  Stephen Cooper
                                                      Title: Acting President

<PAGE>

                                                                            11

                                             FIRST SECURITY BANK, N.A.,
                                                as Trustee,

                                               by /s/ Greg A. Hawley
                                                  -----------------------------
                                                 Name:  Greg A. Hawley
                                                 Title: Vice President

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