Document:

AIRCRAFT GENERAL TERMS AGREEMENT

                                    AGTA-MWE

                                     between

                               THE BOEING COMPANY

                                       and

                         MIDWEST EXPRESS AIRLINES, INC.

<PAGE>

                            TABLE OF CONTENTS
                                                                           PAGE
 ARTICLES                                                                 NUMBER
 --------                                                                 ------

     1.         Subject Matter of Sale                                       1

     2.         Price, Taxes and Payment                                     1

     3.         Regulatory Requirements and Certificates                     3

     4.         Detail Specification; Changes                                4

     5.         Representatives, Inspection, Demonstration Flights,
                Test Data and Performance Guarantee Compliance               4

     6.         Delivery                                                     5

     7.         Excusable Delay                                              5

     8.         Risk Allocation/Insurance                                    7

     9.         Assignment, Resale or Lease                                  8

    10.         Termination for Certain Events                               9

    11.         Notices                                                     10

    12.         Miscellaneous                                               10

 EXHIBITS

     A          Buyer Furnished Equipment Provisions Document

     B          Customer Support Document

     C          Product Assurance Document

APPENDICES

     I          Insurance Certificate

    II          Purchase Agreement Assignment

   III          Post-Delivery Sale Notice

    IV          Post-Delivery Lease Notice

     V          Purchaser's/Lessee's Agreement

    VI          Owner Appointment of Agent - Warranties

   VII          Contractor Confidentiality Agreement

                                       i
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                AIRCRAFT GENERAL TERMS AGREEMENT NUMBER AGTA-MWE

                                     between

                               The Boeing Company

                                       and

                         Midwest Express Airlines, Inc.

                                   Relating to

                                 BOEING AIRCRAFT

     This Aircraft General Terms Agreement Number AGTA-MWE (AGTA) among The
Boeing Company, and its wholly-owned subsidiary McDonnell Douglas Corporation,
(Boeing) and Midwest Express Airlines, Inc. (Customer) will apply to all Boeing
aircraft contracted for purchase from Boeing by Customer after the effective
date of this AGTA.

Article 1.  Subject Matter of Sale.
            ----------------------

     1.1  Aircraft. Boeing will manufacture and sell to Customer and Customer
will purchase from Boeing aircraft under purchase agreements that incorporate
the terms and conditions of this AGTA.

     1.2  Buyer Furnished Equipment. Exhibit A, Buyer Furnished Equipment
Provisions Document to the AGTA, contains the obligations of Customer and Boeing
with respect to equipment purchased and provided by Customer, which Boeing will
receive, inspect, store, and install in an aircraft before delivery to Customer.
This equipment is defined as Buyer Furnished Equipment (BFE).

     1.3  Customer Support. Exhibit B, Customer Support Document to the AGTA,
contains the obligations of Boeing relating to Materials (as defined in Part 3
thereof), training, services, and other things in support of aircraft.

     1.4  Product Assurance. Exhibit C, Product Assurance Document to the AGTA,
contains the obligations of Boeing and the suppliers of equipment installed in
each aircraft at delivery relating to warranties, patent indemnities, software
copyright indemnities, and service life policies.

Article 2.  Price, Taxes, and Payment.
            -------------------------

     2.1  Price.

          2.1.1  Airframe Price is defined as the price of the airframe for a
     specific model of aircraft described in a purchase agreement. (For Models
     717-200, 737-600, 737-700, 737-800, 737-900, 777-200X and 777-300X the
     Airframe Price includes the engine price at its basic thrust level.)

                                       1
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          2.1.2  Optional Features Prices are defined as the prices for optional
     features selected by Customer for a specific model of aircraft described in
     a purchase agreement.

          2.1.3  Engine Price is defined as the price set by the engine
     manufacturer for a specific engine to be installed on the model of aircraft
     described in a purchase agreement (not applicable to Models 717-200,
     737-600, 737-700, 737-800, 737-900, 777-200X and 777-300X).

          2.1.4  Aircraft Basic Price is defined as the sum of the Airframe
     Price, Optional Features Prices, and the Engine Price, if applicable.

          2.1.5  Escalation Adjustment is defined as the price adjustment to the
     Airframe Price (which includes the basic engine price for Models 717-200,
     737-600, 737-700 737-800, 737-900, 777-200X and 777-300X) and the Optional
     Features Prices resulting from the calculation using the economic price
     formula contained in the Airframe and Optional Features Escalation
     Adjustment supplemental exhibit to the applicable purchase agreement. The
     price adjustment to the Engine Price for all other models of aircraft will
     be calculated using the economic price formula in the Engine Escalation
     Adjustment supplemental exhibit to the applicable purchase agreement.

          2.1.6  Advance Payment Base Price is defined as the estimated price of
     an aircraft rounded to the nearest thousand U. S. dollars, as of the date
     of signing a purchase agreement, for the scheduled month of delivery of
     such aircraft using commercial forecasts of the Escalation Adjustment.

          2.1.7  Aircraft Price is defined as the total amount Customer is to
     pay for an aircraft at the time of delivery, which is the sum of the
     Aircraft Basic Price, the Escalation Adjustment, and other price
     adjustments made pursuant to the purchase agreement.

     2.2  Taxes.

          2.2.1  Taxes. Taxes are defined as all taxes, fees, charges, or duties
     and any interest, penalties, fines, or other additions to tax, including,
     but not limited to sales, use, value added, gross receipts, stamp, excise,
     transfer, and similar taxes imposed by any domestic or foreign taxing
     authority, arising out of or in connection with the performance of the
     applicable purchase agreement or the sale, delivery, transfer, or storage
     of any aircraft, BFE, or other things furnished under the applicable
     purchase agreement. Except for U.S. federal or California State income
     taxes imposed on Boeing or Boeing's assignee, and Washington State business
     and occupation taxes imposed on Boeing or Boeing's assignee, Customer will
     be responsible for and pay all Taxes. Customer is responsible for filing
     all tax returns, reports, declarations and payment of any taxes related to
     or imposed on BFE.

          2.2.2  Reimbursement of Boeing. Customer will promptly reimburse
     Boeing on demand, net of additional taxes thereon, for any Taxes that are
     imposed on and paid by Boeing or that Boeing is responsible for collecting.

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     2.3  Payment.

          2.3.1  Advance Payment Schedule. Customer will make advance payments
     to Boeing for each aircraft in the amounts and on the dates indicated in
     the schedule set forth in the applicable purchase agreement.

          2.3.2  Payment at Delivery. Customer will pay any unpaid balance of
     the Aircraft Price at the time of delivery of each aircraft.

          2.3.3  Form of Payment. Customer will make all payments to Boeing by
     unconditional wire transfer of immediately available funds in United States
     Dollars in a bank account in the United States designated by Boeing.

          2.3.4  Monetary and Government Regulations. Customer is responsible
     for complying with all monetary control regulations and for obtaining
     necessary governmental authorizations related to payments.

Article 3.  Regulatory Requirements and Certificates.
            ----------------------------------------

     3.1  Certificates. Boeing will manufacture each aircraft to conform to the
appropriate Type Certificate issued by the United States Federal Aviation
Administration (FAA) for the specific model of aircraft and will obtain from the
FAA and furnish to Customer at delivery of each aircraft either a Standard
Airworthiness Certificate or an Export Certificate of Airworthiness issued
pursuant to Part 21 of the Federal Aviation Regulations.

     3.2  FAA or Applicable Regulatory Authority Manufacturer Changes.

          3.2.1  A Manufacturer Change is defined as any change to an aircraft,
     data relating to an aircraft, or testing of an aircraft required by the FAA
     to obtain a Standard Airworthiness Certificate, or by the country of import
     and/or registration to obtain an Export Certificate of Airworthiness.

          3.2.2  Boeing will bear the cost of incorporating all Manufacturer
     Changes into the aircraft:

                 (i)   resulting from requirements issued by the FAA prior to
          the date of the Type Certificate for the applicable aircraft;

                 (ii)  resulting from requirements issued by the FAA prior to
          the date of the applicable purchase agreement; and

                 (iii) for any aircraft delivered during the 18 month period
          immediately following the date of the applicable purchase agreement
          (regardless of when the requirement for such change was issued by the
          FAA).

          3.2.3  Customer will pay Boeing's charge for incorporating all other
     Manufacturer Changes into the aircraft, including all changes for
     validation of an aircraft required by any governmental agency of the
     country of import and/or registration.

                                       3
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     3.3  FAA Operator Changes.

          3.3.1  An Operator Change is defined as a change in equipment that is
     required by Federal Aviation Regulations which (i) is generally applicable
     to transport category aircraft to be used in United States certified air
     carriage and (ii) the required compliance date is on or before the
     scheduled delivery month of the aircraft.

          3.3.2  Boeing will deliver each aircraft with Operator Changes
     incorporated or, at Boeing's option, with suitable provisions for the
     incorporation of such Operator Changes, and Customer will pay Boeing's
     applicable charges.

          3.4  Export License. If an export license is required by United States
     law or regulation for any aircraft or any other things delivered under the
     purchase agreement, it is Customer's obligation to obtain such license. If
     requested, Boeing will assist Customer in applying for any such export
     license. Customer will furnish any required supporting documents.

Article 4.  Detail Specification; Changes.
            -----------------------------

     4.1  Configuration Changes. The Detail Specification is defined as the
Boeing document that describes the configuration of each aircraft purchased by
Customer. The Detail Specification for each aircraft may be amended (i) by
Boeing to reflect the incorporation of Manufacturer Changes and Operator Changes
or (ii) by the agreement of the parties. In either case the amendment will
describe the particular changes to be made and any effect on design,
performance, weight, balance, scheduled delivery month, Aircraft Basic Price,
Aircraft Price, and/or Advance Payment Base Price.

     4.2  Development Changes. Development Changes are defined as changes to
aircraft that do not affect the Aircraft Price or scheduled delivery month, and
do not adversely affect guaranteed weight, guaranteed performance, or compliance
with the interchangeability or replaceability requirements set forth in the
applicable Detail Specification. Boeing may, at its option, incorporate
Development Changes into the Detail Specification and into an aircraft prior to
delivery to Customer.

     4.3 Notices. Boeing will promptly notify Customer of any amendments to a
Detail Specification.

Article 5.  Representatives, Inspection, Demonstration Flights, Test Data and
            ------------------------------------------------------------------
            Performance Guarantee Compliance.
            --------------------------------

     5.1  Office Space. Twelve months before delivery of the first aircraft
purchased, and continuing until the delivery of the last aircraft on firm order,
Boeing will furnish, free of charge, suitable office space and equipment for the
accommodation of up to three representatives of Customer in or conveniently
located near the assembly plant.

     5.2  Inspection. Customer's representatives may inspect each aircraft at
any reasonable time, provided such inspection does not interfere with Boeing's
performance.

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     5.3  Demonstration Flights. Prior to delivery, Boeing will fly each
aircraft up to 4 hours to demonstrate to Customer the function of the aircraft
and its equipment using Boeing's production flight test procedures. Customer may
designate up to five representatives to participate as observers.

     5.4  Test Data; Performance Guarantee Compliance. Performance Guarantees
are defined as the written guarantees in a purchase agreement regarding the
operational performance of an aircraft. Boeing will furnish to Customer flight
test data obtained on an aircraft of the same model to evidence compliance with
the Performance Guarantees. Performance Guarantees will be met if reasonable
engineering interpretations and calculations based on the flight test data
establish that the particular aircraft being delivered under the applicable
purchase agreement would, if actually flown, comply with the guarantees.

     5.5  Special Aircraft Test Requirements. Boeing may use an aircraft for
flight and ground tests prior to delivery, without reduction in the Aircraft
Price, if the tests are considered necessary by Boeing (i) to obtain or maintain
the Type Certificate or Certificate of Airworthiness for the aircraft or (ii) to
evaluate potential improvements that may be offered for production or retrofit
incorporation.

Article 6.  Delivery.
            --------

     6.1  Notices of Delivery Dates. Boeing will notify Customer of the
approximate delivery date of each aircraft at least 30 days before the scheduled
month of delivery and again at least 14 days before the scheduled delivery date.

     6.2  Place of Delivery. Each aircraft will be delivered at a facility
selected by Boeing in the same state as the primary assembly plant for the
aircraft.

     6.3  Bill of Sale. At delivery of an aircraft, Boeing will provide Customer
a bill of sale conveying good title, free of encumbrances.

     6.4  Delay. If Customer delays acceptance of an aircraft beyond the
scheduled delivery date, Customer will reimburse Boeing for all costs incurred
by Boeing as a result of the delay.

Article 7.  Excusable Delay.
            ---------------

     7.1  General. Boeing will not be liable for any delay in the scheduled
delivery month of an aircraft or other performance under a purchase agreement
caused by (i) acts of God; (ii) war or armed hostilities; (iii) government acts
or priorities; (iv) fires, floods, or earthquakes; (v) strikes or labor troubles
causing cessation, slowdown, or interruption of work; (vi) inability, after due
and timely diligence, to procure materials, systems, accessories, equipment or
parts; or (vii) any other cause to the extent such cause is beyond Boeing's
control and not occasioned by Boeing's fault or negligence. A delay resulting
from any such cause is defined as an Excusable Delay.

     7.2  Notice. Boeing will give written notice to Customer (i) of a delay as
soon as Boeing concludes that an aircraft will be delayed beyond the scheduled
delivery month due to

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an Excusable Delay and, when known, (ii) of a revised delivery month based on
Boeing's appraisal of the facts.

     7.3  Delay in Delivery of Twelve Months or Less. If the revised delivery
month is 12 months or less after the scheduled delivery month, Customer will
accept such aircraft when tendered for delivery, subject to the following:

          7.3.1  The calculation of the Escalation Adjustment will be based on
     the previously scheduled delivery month.

          7.3.2  The advance payment schedule will be adjusted to reflect the
     revised delivery month.

          7.3.3  All other provisions of the applicable purchase agreement,
     including the BFE on-dock dates for the delayed aircraft, are unaffected by
     an Excusable Delay.

     7.4  Delay in Delivery of More Than Twelve Months. If the revised delivery
month is more than 12 months after the scheduled delivery month, either party
may terminate the applicable purchase agreement with respect to such aircraft
within 30 days of the notice. If either party does not terminate the applicable
purchase agreement with respect to such aircraft, all terms and conditions of
the applicable purchase agreement will remain in effect.

     7.5  Aircraft Damaged Beyond Repair. If an aircraft is destroyed or damaged
beyond repair for any reason before delivery, Boeing will give written notice to
Customer specifying the earliest month possible, consistent with Boeing's other
contractual commitments and production capabilities, in which Boeing can deliver
a replacement. Customer will have 30 days from receipt of such notice to elect
to have Boeing manufacture a replacement aircraft under the same terms and
conditions of purchase, except that the calculation of the Escalation Adjustment
will be based upon the scheduled delivery month in effect immediately prior to
the date of such notice, or, failing such election, the applicable purchase
agreement will terminate with respect to such aircraft. Boeing will not be
obligated to manufacture a replacement aircraft if reactivation of the
production line for the specific model of aircraft would be required.

     7.6  Termination. Termination under this Article will discharge all
obligations and liabilities of Boeing and Customer with respect to any aircraft
and all related undelivered Materials (as defined in Exhibit B, Customer Support
Document), training, services, and other things terminated under the applicable
purchase agreement, except that Boeing will return to Customer, without
interest, an amount equal to all advance payments paid by Customer for the
aircraft. If Customer terminates the applicable purchase agreement as to any
aircraft, Boeing may elect, by written notice to Customer within 30 days, to
purchase from Customer any BFE related to the aircraft at the invoice prices
paid, or contracted to be paid, by Customer.

     7.7  Exclusive Rights. The termination rights in this Article are in
substitution for all other rights of termination or any claim arising by
operation of law due to delays in performance covered by this Article.

Article 8.  Risk Allocation/Insurance.
            -------------------------

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     8.1  Title and Risk with Boeing.

          8.1.1  Boeing's Indemnification of Customer. Until transfer of title
     to an aircraft to Customer, Boeing will indemnify and hold harmless
     Customer and Customer's observers from and against all claims and
     liabilities, including all expenses and attorneys' fees incident thereto or
     incident to establishing the right to indemnification, for injury to or
     death of any person(s), including employees of Boeing but not employees of
     Customer, or for loss of or damage to any property, including an aircraft,
     arising out of or in any way related to the operation of an aircraft during
     all demonstration and test flights conducted under the provisions of the
     applicable purchase agreement, whether or not arising in tort or occasioned
     by the negligence of Customer or any of Customer's observers.

          8.1.2  Definition of Customer. For the purposes of this Article,
     "Customer" is defined as Midwest Express, its divisions, subsidiaries,
     affiliates, the assignees of each, and their respective directors,
     officers, employees, and agents.

     8.2  Insurance.

          8.2.1  Insurance Requirements. Customer will purchase and maintain
     insurance acceptable to Boeing and will provide a certificate of such
     insurance that names Boeing as an additional insured for any and all claims
     and liabilities for injury to or death of any person or persons, including
     employees of Customer but not employees of Boeing, or for loss of or damage
     to any property, including any aircraft, arising out of or in any way
     relating to Materials, training, services, or other things provided under
     Exhibit B of the AGTA, which will be incorporated by reference into the
     applicable purchase agreement, whether or not arising in tort or occasioned
     by the negligence of Boeing, except with respect to legal liability to
     persons or parties other than Customer or Customer's assignees arising out
     of an accident caused solely by a product defect in an aircraft. Customer
     will provide such certificate of insurance at least thirty (30) days prior
     to the scheduled delivery of the first aircraft under a purchase agreement.
     The insurance certificate will reference each aircraft delivered to
     Customer pursuant to each applicable purchase agreement. Annual renewal
     certificates will be submitted to Boeing before the expiration of the
     policy periods. The form of the insurance certificate, attached as Appendix
     I, states the terms, limits, provisions, and coverages required by this
     Article 8.2.1. The failure of Boeing to demand compliance with this 8.2.1
     in any year will not in any way relieve Customer of its obligations
     hereunder nor constitute a waiver by Boeing of these obligations.

          8.2.2 Noncompliance with Insurance Requirements. If Customer fails to
     comply with any of the insurance requirements of Article 8.2.1 or if any of
     the insurers fails to pay a claim covered by the insurance or otherwise
     fails to meet any of insurer's obligations required by Appendix I, Customer
     will provide the same protection to Boeing as that required by Article
     8.2.1 above.

          8.2.3  Definition of Boeing. For purposes of this article, "Boeing" is
     defined as The Boeing Company, its divisions, subsidiaries, affiliates,
     assignees of each, and their respective directors, officers, employees, and
     agents.

Article 9.  Assignment, Resale, or Lease.
            ----------------------------

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     9.1  Assignment. This AGTA and each applicable purchase agreement are for
the benefit of the parties and their respective successors and assigns. No
rights or duties of either party may be assigned or delegated, or contracted to
be assigned or delegated, without the prior written consent of the other party,
except:

          9.1.1  Either party may assign its interest to a corporation that (i)
     results from any merger, reorganization, or acquisition of such party and
     (ii) acquires substantially all the assets of such party;

          9.1.2  Boeing may assign its rights to receive money; and

          9.1.3  Boeing may assign any of its rights and duties to any
     wholly-owned subsidiary of Boeing.

          9.1.4  Boeing may assign any of its rights and duties with respect to
     Part 1, Articles 1, 2, 4 and 5 of Exhibit B, Customer Support Document to
     the AGTA, to FlightSafety Boeing Training International L.L.C.

     9.2  Transfer by Customer at Delivery. Boeing will take any requested
action reasonably required for the purpose of causing an aircraft, at time of
delivery, to be subject to an equipment trust, conditional sale, lien, or other
arrangement for Customer to finance the aircraft. However, no such action will
require Boeing to divest itself of title to or possession of the aircraft until
delivery of and payment for the aircraft. A sample form of assignment acceptable
to Boeing is attached as Appendix II.

     9.3  Sale or Lease by Customer After Delivery. If, following delivery of an
aircraft, Customer sells or leases the aircraft (including any sale and
lease-back for financing purposes), all of Customer's rights with respect to the
aircraft under the applicable purchase agreement will inure to the benefit of
the purchaser or lessee of such aircraft, effective upon Boeing's receipt of the
written agreement of the purchaser or lessee, in a form satisfactory to Boeing,
to comply with all applicable terms and conditions of the applicable purchase
agreement. Sample forms of agreement acceptable to Boeing are attached as
Appendices III and IV.

     9.4  Notice of Sale or Lease After Delivery. Customer will give notice to
Boeing as soon as practicable of the sale or lease of an aircraft, including in
the notice the name of the entity or entities with title and/or possession of
such aircraft.

     9.5  Exculpatory Clause in Post-Delivery Sale or Lease. If, following the
delivery of an aircraft, Customer sells or leases such aircraft and obtains from
the transferee any form of exculpatory clause protecting Customer from liability
for loss of or damage to the aircraft, and/or related incidental or
consequential damages, including without limitation loss of use, revenue, or
profit, Customer shall obtain for Boeing the purchaser's or lessee's written
agreement to be bound by terms and conditions substantially as set forth in
Appendix V. This Article 9.5 applies only if purchaser or lessee has not
provided to Boeing the written agreement described in Article 9.3 above.

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     9.6  Appointment of Agent - Warranty Claims. If, following delivery of an
aircraft, Customer appoints an agent to act directly with Boeing for the
administration of claims relating to the warranties under the applicable
purchase agreement, Boeing will deal with the agent for that purpose, effective
upon Boeing's receipt of the agent's written agreement, in a form satisfactory
to Boeing, to comply with all applicable terms and conditions of the applicable
purchase agreement. A sample form of agreement acceptable to Boeing is attached
as Appendix VI.

     9.7  No Increase in Boeing Liability. No action taken by Customer or Boeing
relating to the resale or lease of an aircraft or the assignment of Customer's
rights under the applicable purchase agreement will subject Boeing to any
liability beyond that in the applicable purchase agreement or modify in any way
Boeing's obligations under the applicable purchase agreement.

Article 10.  Termination of Purchase Agreements for Certain Events.
             -----------------------------------------------------

     10.1 Termination. If either party

          (i)   ceases doing business as a going concern, or suspends all or
     substantially all its business operations, or makes an assignment for the
     benefit of creditors, or generally does not pay its debts as they become
     due, or admits in writing its inability to pay its debts; or

          (ii)  petitions for or acquiesces in the appointment of any receiver,
     trustee or similar officer to liquidate or conserve its business or any
     substantial part of its assets; commences any legal proceeding such as
     bankruptcy, reorganization, readjustment of debt, dissolution, or
     liquidation available for the relief of financially distressed debtors; or
     becomes the object of any such proceeding, unless the proceeding is
     dismissed or stayed within a reasonable period, not to exceed 60 days,

the other party may terminate any purchase agreement with respect to any
undelivered aircraft, Materials, training, services, and other things by giving
written notice of termination.

     10.2 Repayment of Advance Payments. If Customer terminates the applicable
purchase agreement under this Article, Boeing will repay to Customer, without
interest, an amount equal to any advance payments received by Boeing from
Customer with respect to undelivered aircraft.

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<PAGE>

Article 11.  Notices.
             -------

     All notices required by this AGTA or by any applicable purchase agreement
will be in English, will be effective on the date of receipt, and will be
transmitted by any customary means of written communication, addressed as
follows:

          Customer:    Midwest Express Airlines, Inc.
                       6744 South Howell Avenue
                       Oak Creek, Wisconsin 53154

          Boeing:      Boeing Commercial Airplane Group
                       P.O. Box 3707
                       Seattle, Washington  98124-2207
                       U.S.A.

                       Attention: Vice President - Contracts
                                  Mail Code 21-34

Article 12.  Miscellaneous.
             -------------

     12.1 Government Approval. Boeing and Customer will assist each other in
obtaining any governmental consents or approvals required to effect
certification and sale of aircraft under the applicable purchase agreement.

     12.2 Headings. Article and paragraph headings used in this AGTA and in any
purchase agreement are for convenient reference only and are not intended to
affect the interpretation of this AGTA or any purchase agreement.

     12.3 GOVERNING LAW. THIS AGTA AND ANY PURCHASE AGREEMENT WILL BE
INTERPRETED UNDER AND GOVERNED BY THE LAWS OF THE STATE OF WASHINGTON, U.S.A.,
EXCEPT THAT WASHINGTON'S CHOICE OF LAW RULES SHALL NOT BE INVOKED FOR THE
PURPOSE OF APPLYING THE LAW OF ANOTHER JURISDICTION.

     12.4 Waiver/Severability. Failure by either party to enforce any provision
of this AGTA or any purchase agreement will not be construed as a waiver. If any
provision of this AGTA or any provision of any purchase agreement are held
unlawful or otherwise ineffective by a court of competent jurisdiction, the
remainder of the AGTA or the applicable purchase agreement will remain in
effect.

     12.5 Survival of Obligations. The Articles and Exhibits of this AGTA
including but not limited to those relating to insurance, DISCLAIMER AND RELEASE
and the EXCLUSION OF CONSEQUENTIAL AND OTHER DAMAGES will survive termination or
cancellation of any purchase agreement or part thereof.

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<PAGE>

     12.6 AGTA Changes. The intent of the AGTA is to simplify the standard
contracting process for terms and conditions which are related to the sale and
purchase of all Boeing aircraft. This AGTA has been mutually agreed to by the
parties as of the date indicated below. From time to time the parties may elect,
by mutual agreement to update, or modify the existing articles as written. If
such changes are made, any existing executed Purchase Agreement(s) will be
governed by the terms and conditions of the Revision level of the AGTA in effect
based on the date of the executed Purchase Agreement.

DATED AS OF  September 28, 2001
            -------------------------

Midwest ExpressAIRLINES, Inc.              THE BOEING COMPANY

By   /s/ Timothy E. Hoeksema               By   /s/ Rick Nelson
     --------------------------------           --------------------------------

Its  Chairman of the Board, President          Its Attorney-In-Fact
     and Chief Executive Officer

MCDONNELL DOUGLAS CORPORATION

By   /s/ Rick Nelson
     --------------------------------

Its  Attorney-In-Fact

                                       11
<PAGE>

                                    EXHIBIT A

                                       to

                        AIRCRAFT GENERAL TERMS AGREEMENT

                                    AGTA-MWE

                                     BETWEEN

                               THE BOEING COMPANY

                                       AND

                         MIDWEST EXPRESS AIRLINES, INC.

                  BUYER FURNISHED EQUIPMENT PROVISIONS DOCUMENT

<PAGE>

                  BUYER FURNISHED EQUIPMENT PROVISIONS DOCUMENT

1.   General.
     -------

     Certain equipment to be installed in the Aircraft is furnished to Boeing by
Customer at Customer's expense. This equipment is designated "Buyer Furnished
Equipment" (BFE) and is listed in the Detail Specification. Boeing will provide
to Customer a BFE Requirements On-Dock/Inventory Document (BFE Document) or an
electronically transmitted BFE Report which may be periodically revised, setting
forth the items, quantities, on-dock dates and shipping instructions relating to
the in sequence installation of BFE as described in the applicable Supplemental
Exhibit to this Exhibit A in a purchase agreement at the time of aircraft
purchase.

2.   Supplier Selection.
     ------------------

     Customer will:

     2.1  Select and notify Boeing of the suppliers of BFE items by those dates
appearing in Supplemental Exhibit BFE1 to the applicable purchase agreement at
the time of aircraft purchase.

     2.2  Meet with Boeing and such selected BFE suppliers promptly after such
selection to:

          2.2.1  complete BFE configuration design requirements for such BFE;
     and

          2.2.2  confirm technical data submittal requirements for BFE
     certification.

3.   Customer's Obligations.
     ----------------------

     Customer will:

     3.1  comply with and cause the supplier to comply with the provisions of
the BFE Document or BFE Report;

          3.1.1  deliver technical data (in English) to Boeing as required to
     support installation and FAA certification in accordance with the schedule
     provided by Boeing or as mutually agreed upon during the BFE meeting
     referred to above;

          3.1.2  deliver BFE including production and/or flight training spares
     and BFE Aircraft Software to Boeing in accordance with the quantities and
     schedule provided therein; and

                                      A-1
<PAGE>

          3.1.3  assure that all BFE Aircraft Software is delivered in
     compliance with Boeing's then-current Standards for Loadable Systems;

          3.1.4  assure that all BFE parts are delivered to Boeing with
     appropriate quality assurance documentation;

     3.2  authorize Boeing to discuss all details of the BFE directly with the
BFE suppliers;

     3.3  authorize Boeing to conduct or delegate to the supplier quality source
inspection and supplier hardware acceptance of BFE at the supplier location;

          3.3.1  require supplier's contractual compliance to Boeing defined
     quality assurance requirements, source inspection programs and supplier
     delegation programs, including availability of adequate facilities for
     Boeing resident personnel; and

          3.3.2  assure that all BFE supplier's quality systems are approved to
     Boeing's then current standards for such systems ;

     3.4  obtain from supplier a non-exclusive, perpetual, royalty-free,
irrevocable license for Boeing to copy BFE Aircraft Software. The license is
needed to enable Boeing to load the software copies in (i) the aircraft's mass
storage device (MSD), (ii) media (e.g., diskettes, CD-ROMs, etc.), (iii) the BFE
hardware and/or (iv) an intermediate device or other media to facilitate copying
of the BFE Aircraft Software into the aircraft's MSD, BFE hardware and/or media,
including media as Boeing may deliver to Customer with the aircraft;

     3.5  grant Boeing a license, extending the same rights set forth in
paragraph 3.4 above, to copy: a) BFE Aircraft Software and data Customer has
modified and/or b) other software and data Customer has added to the BFE
Aircraft Software;

     3.6  provide necessary field service representation at Boeing's facilities
to support Boeing on all issues related to the installation and certification of
BFE;

     3.7  deal directly with all BFE suppliers to obtain overhaul data,
provisioning data, related product support documentation and any warranty
provisions applicable to the BFE;

     3.8  work closely with Boeing and the BFE suppliers to resolve any
difficulties, including defective equipment, that arise;

     3.9  be responsible for modifying, adjusting and/or calibrating BFE as
required for FAA approval and for all related expenses;

                                      A-2
<PAGE>

     3.10 assure that a proprietary information agreement is in place between
Boeing and BFE suppliers prior to Boeing providing any documentation to such
suppliers,

     3.11 warrant that the BFE will comply with all applicable FARs and the U.S.
Food and Drug Administration (FDA) sanitation requirements for installation and
use in the Aircraft at the time of delivery. Customer will be responsible for
supplying any data and adjusting, calibrating, re-testing or updating such BFE
and data to the extent necessary to obtain applicable FAA and FDA approval and
shall bear the resulting expenses.

     3.12 warrant that the BFE will meet the requirements of the Detail
Specification; and

     3.13 be responsible for providing equipment which is FAA certifiable at
time of Aircraft delivery, or for obtaining waivers from the applicable
regulatory agency for non-FAA certifiable equipment.

4.   Boeing's Obligations.
     --------------------

     Other than as set forth below, Boeing will provide for the installation of
and install the BFE and obtain certification of the Aircraft with the BFE
installed.

5.   Nonperformance by Customer.
     --------------------------

     If Customer's nonperformance of obligations in this Exhibit or in the BFE
Document causes a delay in the delivery of the Aircraft or causes Boeing to
perform out-of-sequence or additional work, Customer will reimburse Boeing for
all resulting expenses and be deemed to have agreed to any such delay in
Aircraft delivery. In addition Boeing will have the right to:

     5.1  provide and install specified equipment or suitable alternate
equipment and increase the price of the Aircraft accordingly; and/or

     5.2  deliver the Aircraft to Customer without the BFE installed.

6.   Return of Equipment.
     -------------------

     BFE not installed in the Aircraft will be returned to Customer in
accordance with Customer's instructions and at Customer's expense.

                                      A-3
<PAGE>

7.   Title and Risk of Loss.
     ----------------------

     7.1  With respect to Aircraft manufactured in the State of Washington,
title to and risk of loss of BFE provided for such Aircraft will at all times
remain with Customer or other owner. Boeing will have only such liability for
BFE as a bailee for mutual benefit would have, but will not be liable for loss
of use.

     7.2  With respect to Aircraft manufactured in the State of California,
Customer agrees to sell and Boeing agrees to purchase each item of BFE
concurrently with its delivery to Boeing. A reasonable shipset price for the BFE
shall be established with Customer. Customer and Boeing agree that the Aircraft
Price will be increased by the amount of said shipset price and such amount will
be included on Boeing's invoice at time of Aircraft delivery. Boeing's payment
for the purchase of each shipset of BFE from Customer will be made at the time
of delivery of the Aircraft in which the BFE is installed.

8.   Interchange of BFE
     ------------------

     To properly maintain Boeing's production flow and to preserve Boeing's
delivery commitments, Boeing reserves the right, if necessary, due to equipment
shortages or failures, to interchange new items of BFE acquired from or for
Customer with new items of the same part numbers acquired from or for other
customers of Boeing. Used BFE acquired from Customer or from other customers of
Boeing will not be interchanged.

9.   Indemnification of Boeing.
     -------------------------

     Customer hereby indemnifies and holds harmless Boeing from and against all
claims and liabilities, including costs and expenses (including attorneys' fees)
incident thereto or incident to successfully establishing the right to
indemnification, for injury to or death of any person or persons, including
employees of Customer but not employees of Boeing, or for loss of or damage to
any property, including any Aircraft, arising out of or in any way connected
with any nonconformance or defect in any BFE and whether or not arising in tort
or occasioned by the negligence of Boeing. This indemnity will not apply with
respect to any nonconformance or defect caused solely by Boeing's installation
of the BFE.

10.  Patent Indemnity.
     ----------------

     Customer hereby indemnifies and holds harmless Boeing from and against all
claims, suits, actions, liabilities, damages and costs arising out of any actual
or alleged infringement of any patent or other intellectual property rights by
BFE or arising out of the installation, sale or use of BFE by Boeing.

                                      A-4
<PAGE>

11.  Definitions.
     -----------

     For the purposes of the above indemnities, the term "Boeing" includes The
Boeing Company, its divisions, subsidiaries and affiliates, the assignees of
each, and their directors, officers, employees and agents.

                                      A-5
<PAGE>

                                    EXHIBIT B

                                       to

                        AIRCRAFT GENERAL TERMS AGREEMENT

                                    AGTA-MWE

                                     between

                               THE BOEING COMPANY

                                       and

                         MIDWEST EXPRESS AIRLINES, INC.

                            CUSTOMER SUPPORT DOCUMENT

                             This document contains:
                             ----------------------

        Part 1:   Maintenance and Flight Training Programs; Operations
                  Engineering Support

        Part 2:   Field Services and Engineering Support
                  Services

        Part 3:   Technical Information and Materials

        Part 4:   Alleviation or Cessation of Performance

        Part 5:   Protection of Proprietary Information and
                  Proprietary Materials

<PAGE>

                            CUSTOMER SUPPORT DOCUMENT

                 PART 1: BOEING MAINTENANCE AND FLIGHT TRAINING
                    PROGRAMS; OPERATIONS ENGINEERING SUPPORT

1.   Boeing Training Programs.
     ------------------------

     1.1  Boeing will provide maintenance training and flight training programs
to support the introduction of a specific model of aircraft into service. The
training programs will consist of general and specialized courses and will be
described in a Supplemental Exhibit to the applicable purchase agreement.

     1.2  Boeing will conduct all training at Boeing's primary training facility
for the model of aircraft purchased unless otherwise agreed.

     1.3  All training will be presented in the English language. If translation
is required, Customer will provide interpreters.

     1.4  Customer will be responsible for all expenses of Customer's personnel.
Boeing will transport Customer's personnel between their local lodging and
Boeing's training facility.

2.   Training Planning Conferences.
     -----------------------------

     Customer and Boeing will conduct planning conferences approximately 12
months before the scheduled delivery month of the first aircraft of a model to
define and schedule the maintenance and flight training programs.

3.   Operations Engineering Support.
     ------------------------------

     3.1  As long as an aircraft purchased by Customer from Boeing is operated
by Customer in scheduled revenue service, Boeing will provide operations
engineering support. Such support will include:

          3.1.1  assistance with the analysis and preparation of performance
     data to be used in establishing operating practices and policies for
     Customer's operation of aircraft;

          3.1.2  assistance with interpretation of the minimum equipment list,
     the definition of the configuration deviation list and the analysis of
     individual aircraft performance;

          3.1.3  assistance with solving operational problems associated with
     delivery and route-proving flights;

                                      B1-1
<PAGE>

          3.1.4  information regarding significant service items relating to
     aircraft performance or flight operations; and

          3.1.5  if requested by Customer, Boeing will provide operations
     engineering support during an aircraft ferry flight.

4.   Training at a Facility Other Than Boeing's.
     ------------------------------------------

     If requested by Customer, Boeing will conduct the classroom portions of the
maintenance and flight training (except for the Performance Engineer training
courses) at a mutually acceptable alternate training site, subject to the
following conditions:

     4.1  Customer will provide acceptable classroom space, simulators (as
necessary for flight training) and training equipment required to present the
courses;

     4.2  Customer will pay Boeing's then-current per diem charge for each
Boeing instructor for each day, or fraction thereof, that the instructor is away
from their home location, including travel time;

     4.3  Customer will reimburse Boeing for the actual costs of round-trip
transportation for Boeing's instructors and the shipping costs of training
Materials between the primary training facility and the alternate training site;

     4.4  Customer will be responsible for all taxes, fees, duties, licenses,
permits and similar expenses incurred by Boeing and its employees as a result of
Boeing's providing training at the alternate site or incurred as a result of
Boeing providing revenue service training; and

     4.5  Those portions of training that require the use of training devices
not available at the alternate site will be conducted at Boeing's facility or at
some other alternate site.

5.   General Terms and Conditions.
     ----------------------------

     5.1  Boeing flight instructor personnel will not be required to work more
than 5 days per week, or more than 8 hours in any one 24-hour period, of which
not more than 5 hours per 8-hour workday will be spent in actual flying. These
foregoing restrictions will not apply to ferry assistance or revenue service
training services, which will be governed by FAA rules and regulations.

     5.2  Normal Line Maintenance is defined as line maintenance that Boeing
might reasonably be expected to furnish for flight crew training at Boeing's
facility, and will include ground support and aircraft storage in the open, but
will not include provision of spare parts. Boeing will provide Normal Line
Maintenance services for any aircraft while the aircraft is used for flight crew
training at Boeing's facility in accordance

                                      B1-2
<PAGE>

with the Boeing Maintenance Plan (Boeing document D6-82076) and the Repair
Station Operation and Inspection Manual (Boeing document D6-25470). Customer
will provide such services if flight crew training is conducted elsewhere.
Regardless of the location of such training, Customer will be responsible for
providing all maintenance items (other than those included in Normal Line
Maintenance) required during the training, including, but not limited to, fuel,
oil, landing fees and spare parts.

     5.3  If the training is based at Boeing's facility, and the aircraft is
damaged during such training, Boeing will make all necessary repairs to the
aircraft as promptly as possible. Customer will pay Boeing's reasonable charge,
including the price of parts and materials, for making the repairs. If Boeing's
estimated labor charge for the repair exceeds $25,000, Boeing and Customer will
enter into an agreement for additional services before beginning the repair
work.

     5.4  If the flight training is based at Boeing's facility, several airports
in surrounding states may be used, at Boeing's option. Unless otherwise agreed
in the flight training planning conference, it will be Customer's responsibility
to make arrangements for the use of such airports.

     5.5  If Boeing agrees to make arrangements on behalf of Customer for the
use of airports for flight training, Boeing will pay on Customer's behalf any
landing fees charged by any airport used in conjunction with the flight
training. At least 30 days before flight training, Customer will provide Boeing
an open purchase order against which Boeing will invoice Customer for any
landing fees Boeing paid on Customer's behalf. The invoice will be submitted to
Customer approximately 60 days after flight training is completed, when all
landing fee charges have been received and verified. Customer will pay to Boeing
within 30 days of the date of the invoice.

     5.6  If requested by Boeing, in order to provide the flight training or
ferry flight assistance, Customer will make available to Boeing an aircraft
after delivery to familiarize Boeing instructor or ferry flight crew personnel
with such aircraft. If flight of the aircraft is required for any Boeing
instructor or ferry flight crew member to maintain an FAA license for flight
proficiency or landing currency, Boeing will be responsible for the costs of
fuel, oil, landing fees and spare parts attributable to that portion of the
flight.

     5.7  If any part of the training described in Article 1.1 of this Exhibit
is not used by Customer within 12 months after the delivery of the last aircraft
under the relevant purchase agreement, Boeing will not be obligated to provide
such training.

                                      B1-3
<PAGE>

                            CUSTOMER SUPPORT DOCUMENT

                 PART 2: FIELD AND ENGINEERING SUPPORT SERVICES

1.   Field Service Representation.
     ----------------------------

     Boeing will furnish field service representation to advise Customer with
respect to the maintenance and operation of an aircraft (Field Service
Representatives).

     1.1  Field Service representation will be available at or near Customer's
main maintenance or engineering facility beginning before the scheduled delivery
month of the first aircraft and ending 12 months after delivery of the last
aircraft covered by a specific purchase agreement.

     1.2  Customer will provide, at no charge to Boeing, suitable furnished
office space and office equipment at the location where Boeing is providing
Field Service Representatives. As required, Customer will assist each Field
Service Representative with visas, work permits, customs, mail handling,
identification passes and formal introduction to local airport authorities.

     1.3  Boeing Field Service Representatives are assigned to various airports
around the world. Whenever Customer's aircraft are operating through any such
airport, the services of Boeing's Field Service Representatives are available to
Customer.

2.   Engineering Support Services.
     ----------------------------

     Boeing will, if requested by Customer, provide technical advisory
assistance for any aircraft and Boeing Product (as defined in Part I of Exhibit
C). Technical advisory assistance, provided from the Seattle area or at a base
designated by Customer as appropriate, will include:

     2.1  Operational Problem Support. If Customer experiences operational
problems with an aircraft, Boeing will analyze the information provided by
Customer to determine the probable nature and cause of the problem and to
suggest possible solutions.

     2.2  Schedule Reliability Support. If Customer is not satisfied with the
schedule reliability of a specific model of aircraft, Boeing will analyze
information provided by Customer to determine the nature and cause of the
problem and to suggest possible solutions.

     2.3  Maintenance Cost Reduction Support. If Customer is concerned that
actual maintenance costs of a specific model of aircraft are excessive, Boeing
will analyze information provided by Customer to determine the nature and cause
of the problem and to suggest possible solutions.

                                      B2-1
<PAGE>

     2.4  Aircraft Structural Repair Support. If Customer is designing
structural repairs and desires Boeing's support, Boeing will analyze and comment
on Customer's engineering releases relating to structural repairs not covered by
Boeing's Structural Repair Manual.

     2.5  Aircraft Modification Support. If Customer is designing aircraft
modifications and requests Boeing's support, Boeing will analyze and comment on
Customer's engineering proposals for changes in, or replacement of, systems,
parts, accessories or equipment manufactured to Boeing's detailed design. Boeing
will not analyze or comment on any major structural change unless Customer's
request for such analysis and comment includes complete detailed drawings,
substantiating information (including any information required by applicable
government agencies), all stress or other appropriate analyses, and a specific
statement from Customer of the substance of the review and the response
requested.

     2.6  Facilities, Ground Equipment and Maintenance Planning Support. Boeing
will, at Customer's request, evaluate Customer's technical facilities, tools and
equipment for servicing and maintaining aircraft, to recommend changes where
necessary and to assist in the formulation of an initial maintenance plan for
the introduction of the aircraft into service.

     2.7  Post-Delivery Service Support. Boeing will, at Customer's request,
perform work on an aircraft after delivery but prior to the initial departure
flight or upon the return of the aircraft to Boeing's facility prior to
completion of that flight. In that event the following provisions will apply.

          2.7.1  Boeing may rely upon the commitment authority of the Customer's
     personnel requesting the work.

          2.7.2  As title and risk of loss has passed to Customer, the insurance
     provisions of Article 8.2 of the AGTA apply.

          2.7.3  The provisions of the Boeing Warranty in Part 2 of Exhibit C of
     this AGTA apply.

          2.7.4  Customer will pay Boeing for requested work not covered by the
     Boeing Warranty, if any.

          2.7.5  The DISCLAIMER AND RELEASE and EXCLUSION OF CONSEQUENTIAL AND
     OTHER DAMAGES provisions in Article 11 of Part 2 of Exhibit C of this AGTA
     apply.

     2.8  Additional Services. Boeing may, at Customer's request, provide
additional services for an aircraft after delivery, which may include, but not
be limited to, retrofit kit changes (kits and/or information), training, flight
services, maintenance and

                                      B2-2
<PAGE>

repair of aircraft. Such additional services will be subject to a mutually
acceptable price, schedule and scope of work. The DISCLAIMER AND RELEASE and the
EXCLUSION OF CONSEQUENTIAL AND OTHER DAMAGES provisions in Article 11 of Part 2
of Exhibit C of this AGTA and the insurance provisions in Article 8.2 of this
AGTA will apply to any such work. Title to and risk of loss of any such aircraft
will always remain with Customer.

                                      B2-3
<PAGE>

                            CUSTOMER SUPPORT DOCUMENT

                   PART 3: TECHNICAL INFORMATION AND MATERIALS

1.   General.
     -------

     Materials are defined as any and all items that are created by Boeing or a
third party, which are provided directly or indirectly from Boeing and serve
primarily to contain, convey or embody information. Materials may include either
tangible embodiments (for example, documents or drawings), or intangible
embodiments (for example, software and other electronic forms) of information
but excludes Aircraft Software. Aircraft Software is defined as software that is
installed on and used in the operation of the aircraft.

     Boeing will furnish to Customer certain Materials to support the
maintenance and operation of the aircraft at no additional charge to Customer,
except as otherwise provided herein. Such Materials will, if applicable, be
prepared generally in accordance with Air Transport Association of America (ATA)
Specification No. 100, entitled "Specification for Manufacturers' Technical
Data". Materials will be in English and in the units of measure used by Boeing
to manufacture an aircraft.

     Digitally-produced Materials will, if applicable, be prepared generally in
accordance with ATA Specification No. 2100, dated January 1994, "Digital Data
Standards for Aircraft Support."

2.   Materials Planning Conferences.
     ------------------------------

     Customer and Boeing will conduct planning conferences approximately 12
months before the scheduled delivery month of the first aircraft of a model in
order to mutually determine the proper format and quantity of Materials to be
furnished to Customer in support of the aircraft.

     When available, Customer may select one Boeing digital format as the
delivery medium. Should a Boeing digital format not be chosen, Customer may
select a reasonable quantity of printed and 16mm microfilm formats, with the
exception of the Illustrated Parts Catalog, which will be provided in one
selected format only.

3.   Information and Materials - Incremental Increase.
     ------------------------------------------------

     Until one year after the month of delivery of the last aircraft covered by
a specific purchase agreement, Customer may annually request in writing a
reasonable increase in the quantity of Materials with the exception of microfilm
master copies, digital formats, and others for which a specified number of
copies are provided. Boeing will provide the

                                      B3-1
<PAGE>

additional quantity at no additional charge beginning with the next normal
revision cycle. Customer may request a decrease in revision quantities at any
time.

4.   Advance Representative Copies.
     -----------------------------

     All advance representative copies of Materials will be selected by Boeing
from available sources. Such advance copies will be for advance planning
purposes only.

5.   Customized Materials.
     --------------------

     All customized Materials will reflect the configuration of each aircraft as
delivered.

6.   Revisions.
     ---------

     6.1  Revision Service. Boeing will provide revisions free of charge to
certain Materials to be identified in the planning conference conducted for a
specific model of aircraft, reflecting changes developed by Boeing, as long as
Customer operates an aircraft of that model.

     6.2  Revisions Based on Boeing Service Bulletin Incorporation. If Boeing
receives written notice that Customer intends to incorporate, or has
incorporated, any Boeing service bulletin in an aircraft, Boeing will at no
charge issue revisions to Materials with revision service reflecting the effects
of such incorporation into such aircraft.

7.   Supplier Technical Data.
     -----------------------

     7.1  For supplier-manufactured programmed airborne avionics components and
equipment classified as Seller Furnished Equipment (SFE) or Seller Purchased
Equipment (SPE) or Buyer Designated Equipment (BDE) which contain computer
software designed and developed in accordance with Radio Technical Commission
for Aeronautics Document No. RTCA/DO-178 dated January 1982, No. RTCA/DO-178A
dated March 1985, or later as available, Boeing will request that each supplier
of the components and equipment make software documentation available to
Customer.

     7.2  The provisions of this Article will not be applicable to items of BFE.

     7.3  Boeing will furnish to Customer a document identifying the terms and
conditions of the product support agreements between Boeing and its suppliers
requiring the suppliers to fulfill Customer's requirements for information and
services in support of the specific model of aircraft.

                                      B3-2
<PAGE>

8.   Buyer Furnished Equipment Data.
     ------------------------------

     Boeing will incorporate BFE information into the customized Materials
providing Customer makes the information available to Boeing at least nine
months prior to the scheduled delivery month of Customer's first aircraft of a
specific model. Customer agrees to furnish the information in Boeing standard
digital format if Materials are to be delivered in Boeing standard digital
format.

9.   Materials Shipping Charges.
     --------------------------

     Boeing will pay the reasonable transportation costs of the Materials.
Customer is responsible for any customs clearance charges, duties, and taxes.

10.  Customer's Shipping Address.
     ---------------------------

     The Materials furnished to Customer hereunder are to be sent to a single
address to be specified. Customer will promptly notify Boeing of any change to
the address.

                                      B3-3
<PAGE>

                            CUSTOMER SUPPORT DOCUMENT

                 PART 4: ALLEVIATION OR CESSATION OF PERFORMANCE

Boeing will not be required to provide any Materials, services, training or
other things at a facility designated by Customer if any of the following
conditions exist:

     1.  a labor stoppage or dispute in progress involving Customer;

     2.  wars or warlike operations, riots or insurrections in the country where
the facility is located;

     3.  any condition at the facility which, in the opinion of Boeing, is
detrimental to the general health, welfare or safety of its personnel or their
families;

     4.  the United States Government refuses permission to Boeing personnel or
their families to enter into the country where the facility is located, or
recommends that Boeing personnel or their families leave the country; or

     5.  the United States Government refuses permission to Boeing to deliver
Materials, services, training or other things to the country where the facility
is located.

After the location of Boeing personnel at the facility, Boeing further reserves
the right, upon the occurrence of any of such events, to immediately and without
prior notice to Customer relocate its personnel and their families.

                                      B4-1
<PAGE>

                            CUSTOMER SUPPORT DOCUMENT

                  PART 5: PROTECTION OF PROPRIETARY INFORMATION
                            AND PROPRIETARY MATERIALS

1.   General.
     -------

     All Materials provided by Boeing to Customer and not covered by a Boeing
CSGTA or other agreement between Boeing and Customer defining Customer's right
to use and disclose the Materials and included information will be covered by,
and subject to the terms of this AGTA. Title to all Materials containing,
conveying or embodying confidential, proprietary or trade secret information
(Proprietary Information) belonging to Boeing or a third party (Proprietary
Materials), will at all times remain with Boeing or such third party. Customer
will treat all Proprietary Materials and all Proprietary Information in
confidence and use and disclose the same only as specifically authorized in this
AGTA.

2.   License Grant.
     -------------

     Boeing grants to Customer a worldwide, non-exclusive, non-transferable
license to use and disclose Proprietary Materials in accordance with the terms
and conditions of this AGTA. Customer is authorized to make copies of Materials
(except for Materials bearing the copyright legend of a third party), and all
copies of Proprietary Materials will belong to Boeing and be treated as
Proprietary Materials under this AGTA. Customer will preserve all proprietary
legends, and all copyright notices on all Materials and insure the inclusion of
those legends and notices on all copies.

3.   Use of Proprietary Materials and Proprietary Information.
     --------------------------------------------------------

     Customer is authorized to use Proprietary Materials and Proprietary
Information for the purpose of: (a) operation, maintenance, repair, or
modification of Customer's aircraft for which the Proprietary Materials and
Proprietary Information have been specified by Boeing and (b) development and
manufacture of training devices and maintenance tools for use by Customer.

4.   Providing of Proprietary Materials to Contractors.
     -------------------------------------------------

     Customer is authorized to provide Proprietary Materials to Customer's
contractors for the sole purpose of maintenance, repair, or modification of
Customer's aircraft for which the Proprietary Materials have been specified by
Boeing. In addition, Customer may provide Proprietary Materials to Customer's
contractors for the sole purpose of developing and manufacturing training
devices and maintenance tools for Customer's use. Before providing Proprietary
Materials to its contractor, Customer will first obtain a written agreement from
the contractor by which the contractor agrees (a) to use the

                                      B5-1
<PAGE>

Proprietary Materials only on behalf of Customer, (b) to be bound by all of the
restrictions and limitations of this Part 5, and (c) that Boeing is a third
party beneficiary under the written agreement. Customer agrees to provide copies
of all such written agreements to Boeing upon request and be liable to Boeing
for any breach of those agreements by a contractor. A sample agreement
acceptable to Boeing is attached as Appendix VII.

5.   Providing of Proprietary Materials and Proprietary Information to
     ------------------------------------------------------------------
     Regulatory Agencies.
     -------------------

     When and to the extent required by a government regulatory agency having
jurisdiction over Customer or an aircraft, Customer is authorized to provide
Proprietary Materials and to disclose Proprietary Information to the agency for
use in connection with Customer's operation, maintenance, repair, or
modification of such aircraft. Customer agrees to take all reasonable steps to
prevent the agency from making any distribution, disclosure, or additional use
of the Proprietary Materials and Proprietary Information provided or disclosed.
Customer further agrees to notify Boeing immediately upon learning of any (a)
distribution, disclosure, or additional use by the agency, (b) request to the
agency for distribution, disclosure, or additional use, or (c) intention on the
part of the agency to distribute, disclose, or make additional use of
Proprietary Materials or Proprietary Information.

                                      B5-2
<PAGE>

                                    EXHIBIT C

                                       to

                        AIRCRAFT GENERAL TERMS AGREEMENT

                                    AGTA-MWE

                                     between

                               THE BOEING COMPANY

                                       and

                         MIDWEST EXPRESS AIRLINES, INC.

                           PRODUCT ASSURANCE DOCUMENT

                             This document contains:
                             ----------------------

            Part 1:     Exhibit C Definitions

            Part 2:     Boeing Warranty

            Part 3:     Boeing Service Life Policy

            Part 4:     Supplier Warranty Commitment

            Part 5:     Boeing Interface Commitment

            Part 6:     Boeing Indemnities against Patent and Copyright
                        Infringement

<PAGE>

                           PRODUCT ASSURANCE DOCUMENT

                          PART 1: EXHIBIT C DEFINITIONS

     Authorized Agent - Agent appointed by Customer to perform corrections and
to administer warranties (see Appendix VI to the AGTA for a form acceptable to
Boeing).

     Average Direct Hourly Labor Rate - the average hourly rate (excluding all
fringe benefits, premium-time allowances, social charges, business taxes and the
like) paid by Customer to its Direct Labor employees.

     Boeing Product - any system, accessory, equipment, part or Aircraft
Software that is manufactured by Boeing or manufactured to Boeing's detailed
design with Boeing's authorization.

     Correct - to repair, modify, provide modification kits or replace with a
new product.

     Correction - a repair, a modification, a modification kit or replacement
with a new product.

     Corrected Boeing Product - a Boeing Product which is free of defect as a
result of a Correction.

     Direct Labor - Labor spent by Customer's direct labor employees to remove,
disassemble, modify, repair, inspect and bench test a defective Boeing Product,
and to reassemble, reinstall a Corrected Boeing Product and perform final
inspection.

     Direct Materials - Items such as parts, gaskets, grease, sealant and
adhesives, installed or consumed in performing a Correction, excluding
allowances for administration, overhead, taxes, customs duties and the like.

     Specification Control Drawing (SCD) - a Boeing document defining
specifications for certain Supplier Products.

     Supplier - the manufacturer of a Supplier Product.

     Supplier Product - any system, accessory, equipment, part or Aircraft
Software that is not manufactured to Boeing's detailed design. This includes but
is not limited to parts manufactured to a SCD, all standards, and other parts
obtained from non-Boeing sources.

                                      C1-1
<PAGE>

                           PRODUCT ASSURANCE DOCUMENT

                             PART 2: BOEING WARRANTY

1.   Applicability.
     -------------

     This warranty applies to all Boeing Products. Warranties applicable to
Supplier Products are in Part 4. Warranties applicable to engines will be
provided by Supplemental Exhibits to individual purchase agreements.

2.   Warranty.
     --------

     2.1  Coverage. Boeing warrants that at the time of delivery:

          (i)   the aircraft will conform to the Detail Specification except for
     portions stated to be estimates, approximations or design objectives;

          (ii)  all Boeing Products will be free from defects in material,
     process of manufacture and workmanship, including the workmanship utilized
     to install Supplier Products, engines and BFE, and;

          (iii) all Boeing Products will be free from defects in design,
     including selection of materials and the process of manufacture, in view of
     the state of the art at the time of design

     2.2  Exceptions. The following conditions do not constitute a defect under
this warranty:

          (i)   conditions resulting from normal wear and tear;

          (ii)  conditions resulting from acts or omissions of Customer; and

          (iii) conditions resulting from failure to properly service and
     maintain a Boeing Product .

3.   Warranty Periods.
     ----------------

     3.1  Warranty. The warranty period begins on the date of aircraft or Boeing
Product delivery and ends: (i) after 48 months for Boeing aircraft models
777-200, -300 or 737-600, -700, -800, -900 or new aircraft models designed and
manufactured with similar, new technology; or, (ii) after 36 months for any
other Boeing aircraft model.

     3.2  Warranty on Corrected Boeing Products. The warranty period applicable
to a Corrected Boeing Product, including the workmanship to Correct and install,
resulting from a defect in material or workmanship is the remainder of the
initial warranty

                                      C2-1
<PAGE>

period for the defective Boeing Product it replaced. The warranty period for a
Corrected Boeing Product resulting from a defect in design is 18 months or the
remainder of the initial warranty period, whichever is longer. The 18 month
period begins on the date of delivery of the Corrected Boeing Product or date of
delivery of the kit or kits furnished to Correct the Boeing Product.

     3.3  Survival of Warranties. All warranty periods are stated above. The
Performance Guarantees will not survive delivery of the aircraft.

4.   Remedies.
     --------

     4.1  Correction Options. Customer may, at its option, either perform a
Correction of a defective Boeing Product or return the Boeing Product to Boeing
for Correction.

     4.2  Warranty Labor Rate. If Customer or its Authorized Agent Corrects a
defective Boeing Product, Boeing will reimburse Customer for Direct Labor Hours
at Customer's established Warranty Labor Rate. Customer's established Warranty
Labor Rate will be the greater of the standard labor rate or 150% of Customer's
Average Direct Hourly Labor Rate. The standard labor rate paid by Boeing to its
customers is established and published annually. Prior to or concurrently with
submittal of Customer's first claim for Direct Labor reimbursement, Customer may
notify Boeing of Customer's then-current Average Direct Hourly Labor Rate, and
thereafter notify Boeing of any material change in such rate. Boeing will
require information from Customer to substantiate such rates.

     4.3  Warranty Inspections. In addition to the remedies to Correct defects
in Boeing Products, Boeing will reimburse Customer for the cost of Direct Labor
to perform certain inspections of the aircraft to determine the occurrence of a
condition Boeing has identified as a covered defect, provided:

          4.3.1  the inspections are recommended by a service bulletin or
     service letter issued by Boeing during the warranty period; and

          4.3.2  such reimbursement will not apply to any inspections performed
     after a Correction is available to Customer.

     4.4  Credit Memorandum Reimbursement. Boeing will make all reimbursements
by credit memoranda which may be applied toward the purchase of Boeing goods and
services.

     4.5  Maximum Reimbursement. Unless previously agreed, the maximum
reimbursement for Direct Labor and Direct Materials used to Correct a defective
Boeing Product will not exceed 65% of Boeing's then-current sales price for a
new replacement Boeing Product.

5.   Discovery and Notice.
     --------------------

                                      C2-2
<PAGE>

     5.1  For a claim to be valid:

          (i)  the defect must be discovered during the warranty period; and

          (ii) Boeing Warranty must receive written notice of the discovery no
     later than 90 days after expiration of the warranty period. The notice must
     include sufficient information to substantiate the claim.

     5.2 Receipt of Customer's or its Authorized Agent's notice of the
discovery of a defect secures Customer's rights to remedies under this Exhibit
C, even though a Correction is performed after the expiration of the warranty
period.

     5.3  Once Customer has given valid notice of the discovery of a defect, a
claim should be submitted as soon as practicable after performance of the
Correction.

     5.4  Boeing may release service bulletins or service letters advising
Customer of the availability of certain warranty remedies. When such advice is
provided, Customer will be deemed to have fulfilled the requirements for
discovery of the defect and submittal of notice under this Exhibit C as of the
date specified in the service bulletin or service letter.

6.   Filing a Claim.
     --------------

     6.1  Authority to File. Claims may be filed by Customer or its Authorized
Agent. Appointment of an Authorized Agent will only be effective upon Boeing's
receipt of the Authorized Agent's express written agreement, in a form
satisfactory to Boeing, to be bound by and to comply with all applicable terms
and conditions of this Aircraft General Terms Agreement.

     6.2  Claim Information.

          6.2.1  Claimant is responsible for providing sufficient information to
     substantiate Customer's rights to remedies under this Exhibit C. Boeing may
     reject a claim for lack of sufficient information. At a minimum, such
     information must include:

                 (i)    identity of claimant;

                 (ii)   serial or block number of the aircraft on which the
          defective Boeing Product was delivered;

                 (iii)  part number and nomenclature of the defective Boeing
          Product;

                                      C2-3
<PAGE>

                 (iv)   purchase order number and date of delivery of the
          defective spare part

                 (v)    description and substantiation of the defect;

                 (vi)   date the defect was discovered;

                 (vii)  date the Correction was completed;

                 (viii) the total flight hours or cycles accrued, if applicable;

                 (ix)   an itemized account of direct labor hours expended in
          performing the Correction; and

                 (x)    an itemized account of any direct materials incorporated
          in the Correction.

          6.2.2  Additional information may be required based on the nature of
     the defect and the remedies requested.

     6.3  Boeing Claim Processing.

          6.3.1  Any claim for a Boeing Product returned by Customer or its
     Authorized Agent to Boeing for Correction must accompany the Boeing
     Product. Any claim not associated with the return of a Boeing Product must
     be signed and submitted in writing directly by Customer or its Authorized
     Agent to Boeing Warranty.

          6.3.2  Boeing will promptly review the claim and will give
     notification of claim approval or rejection. If the claim is rejected,
     Boeing will provide a written explanation.

7.   Corrections Performed by Customer or Its Authorized Agent.
     ---------------------------------------------------------

     7.1  Facilities Requirements. Provided Customer, its Authorized Agent or
its third party contractor, as appropriate, are certified by the appropriate
Civil Aviation Authority or Federal Aviation Authority, Customer or its
Authorized Agent may, at its option, Correct defective Boeing Products at its
facilities, or may subcontract Corrections to a third party contractor.

     7.2  Technical Requirements. All Corrections done by Customer, its
Authorized Agent or a third party contractor must be performed in accordance
with Boeing's applicable service manuals, bulletins or other written
instructions, using parts and materials furnished or approved by Boeing.

     7.3  Reimbursement.

                                      C2-4
<PAGE>

          7.3.1  Boeing will reimburse Customer's reasonable costs of Direct
     Materials and Direct Labor (excluding time expended for overhaul) at
     Customer's Warranty Labor Rate to Correct a defective Boeing Product.
     Claims for reimbursement must contain sufficient information to
     substantiate Direct Labor hours expended and Direct Materials consumed.
     Customer or its Authorized Agent may be required to produce invoices for
     materials.

          7.3.2  Reimbursement for Direct Labor hours to perform Corrections
     stated in a service bulletin will be based on the labor estimates in the
     service bulletin.

          7.3.3  Boeing will reimburse Customer's freight charges associated
     with a Correction of a defect on a Boeing Product performed by its
     Authorized Agent or a third party contractor.

     7.4  Disposition of Defective Boeing Products Beyond Economical Repair.

          7.4.1  A defective Boeing Product found to be beyond economical repair
     (see Article 4.5, Maximum Reimbursement) will be retained for a period of
     60 days from the date Boeing receives Customer's claim. During the 60 day
     period, Boeing may request return of such Boeing Products for inspection
     and confirmation of a defect.

          7.4.2  After the 60 day period, a defective Boeing Product with a
     value of U.S. $2000 or less may be scrapped without notification to Boeing.
     If such Boeing Product has a value greater than U.S. $2000, Customer must
     obtain confirmation of unrepairability by Boeing's on-site Customer
     Services Representative prior to scrapping. Confirmation may be in the form
     of the Representative's signature on Customer's claim or through direct
     communication between the Representative and Boeing Warranty.

8.   Corrections Performed by Boeing.
     -------------------------------

     8.1  Freight Charges. Customer or its Authorized Agent will pay shipping
charges to return a Boeing Product to Boeing. Boeing will reimburse Customer or
its Authorized Agent for reasonable incoming shipping charges for any item
determined to be defective under this Aircraft General Terms Agreement. Boeing
will pay shipping charges to return the Corrected Boeing Product.

     8.2  Customer Instructions. The documentation shipped with the returned
defective Boeing Product may include specific technical instructions for
additional work to be performed on the Boeing Product. The absence of such
instructions will evidence Customer's authorization for Boeing to perform all
necessary Corrections and work required to return the Boeing Product to a
serviceable condition.

     8.3  Correction Time Objectives.

          8.3.1  Boeing's objective for making Corrections is 10 working days
     for avionics and electronic Boeing Products, 30 working days for
     Corrections of other

                                      C2-5
<PAGE>

     Boeing Products performed at Boeing's facilities, and 40 working days for
     Corrections of other Boeing Products performed at a Boeing subcontractor's
     facilities. The objectives are measured from the date Boeing receives the
     defective Boeing Product and a valid claim to the date Boeing ships the
     Correction.

          8.3.2  If Customer has a critical parts shortage because Boeing has
     exceeded a Correction time objective and Customer has procured spare Boeing
     Products for the defective Boeing Product in quantities shown in Boeing's
     Recommended Spare Parts List (RSPL) or Spares Planning and Requirements
     Evaluation Model (M-SPARE), then Boeing will either expedite the Correction
     or provide an interchangeable Boeing Product on a no charge loan or lease
     basis until the Corrected Boeing Product is returned.

     8.4  Title Transfer and Risk of Loss.

          8.4.1  Title to and risk of loss of any Boeing Product returned to
     Boeing will at all times remain with Customer or any other title holder of
     such Boeing Product. While Boeing has possession of the returned Boeing
     Product, Boeing will have only such liabilities as a bailee for mutual
     benefit would have, but will not be liable for loss of use.

          8.4.2  If a Correction requires shipment of a new Boeing Product, then
     at the time Boeing ships the new Boeing Product, title to and risk of loss
     for the returned Boeing Product will pass to Boeing, and title to and risk
     of loss for the new Boeing Product will pass to Customer.

9.   Returning an Aircraft.
     ---------------------

     9.1  Conditions. An aircraft may be returned to Boeing's facilities for
Correction only if:

          (i)   Boeing and Customer agree a covered defect exists;

          (ii)  Customer lacks access to adequate facilities, equipment or
     qualified personnel to perform the Correction; and

          (iii) it is not practical, in Boeing's estimation, to dispatch Boeing
     personnel to perform the Correction at a remote site.

     9.2  Correction Costs. Boeing will perform the Correction at no charge to
Customer. Subject to the conditions of Article 9.1, Boeing will reimburse
Customer for the costs of fuel, oil and landing fees incurred in ferrying the
aircraft to Boeing and back to Customer's facilities. Customer will minimize the
length of both flights.

     9.3  Separate Agreement. Boeing and Customer will enter into a separate
agreement covering return of the aircraft and performance of the Correction.
Authorization by Customer for Boeing to perform additional work that is not part
of the Correction must be received within 24 hours of Boeing's request. If such
authorization is

                                      C2-6
<PAGE>

not received within 24 hours, Customer will be invoiced for work performed by
Boeing that is not part of the Correction.

10.  Insurance.
     ---------

     The provisions of Article 8.2 "Insurance", of this AGTA, will apply to any
work performed by Boeing in accordance with Customer's specific technical
instructions, to the extent any legal liability of Boeing is based upon the
content of such instructions.

11.  Disclaimer and Release; Exclusion of Liabilities.
     ------------------------------------------------

     11.1 DISCLAIMER AND RELEASE. THE WARRANTIES, OBLIGATIONS AND LIABILITIES OF
BOEING AND THE REMEDIES OF CUSTOMER IN THIS EXHIBIT C ARE EXCLUSIVE AND IN
SUBSTITUTION FOR, AND CUSTOMER HEREBY WAIVES, RELEASES AND RENOUNCES, ALL OTHER
WARRANTIES, OBLIGATIONS AND LIABILITIES OF BOEING AND ALL OTHER RIGHTS, CLAIMS
AND REMEDIES OF CUSTOMER AGAINST BOEING, EXPRESS OR IMPLIED, ARISING BY LAW OR
OTHERWISE, WITH RESPECT TO ANY NONCONFORMANCE OR DEFECT IN ANY AIRCRAFT,
MATERIALS, TRAINING, SERVICES OR OTHER THING PROVIDED UNDER THIS AGTA AND THE
APPLICABLE PURCHASE AGREEMENT, INCLUDING, BUT NOT LIMITED TO:

          (A) ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS;

          (B) ANY IMPLIED WARRANTY ARISING FROM COURSE OF PERFORMANCE, COURSE OF
     DEALING OR USAGE OF TRADE;

          (C) ANY OBLIGATION, LIABILITY, RIGHT, CLAIM OR REMEDY IN TORT, WHETHER
     OR NOT ARISING FROM THE NEGLIGENCE OF BOEING; AND

          (D) ANY OBLIGATION, LIABILITY, RIGHT, CLAIM OR REMEDY FOR LOSS OF OR
     DAMAGE TO ANY AIRCRAFT.

     11.2 EXCLUSION OF CONSEQUENTIAL AND OTHER DAMAGES. BOEING WILL HAVE NO
OBLIGATION OR LIABILITY, WHETHER ARISING IN CONTRACT (INCLUDING WARRANTY), TORT,
WHETHER OR NOT ARISING FROM THE NEGLIGENCE OF BOEING, OR OTHERWISE, FOR LOSS OF
USE, REVENUE OR PROFIT, OR FOR ANY OTHER INCIDENTAL OR CONSEQUENTIAL DAMAGES
WITH RESPECT TO ANY NONCONFORMANCE OR DEFECT IN ANY AIRCRAFT, MATERIALS,
TRAINING, SERVICES OR OTHER THING PROVIDED UNDER THIS AGTA AND THE APPLICABLE
PURCHASE AGREEMENT.

                                      C2-7
<PAGE>

     11.3 Definitions. For the purpose of this Article, "BOEING" or "Boeing" is
defined as The Boeing Company, its divisions, subsidiaries, affiliates, the
assignees of each, and their respective directors, officers, employees and
agents.

                                      C2-8
<PAGE>

                           PRODUCT ASSURANCE DOCUMENT

                       PART 3: BOEING SERVICE LIFE POLICY

1.   Definitions.
     -----------

     SLP Component - any of the primary structural elements (excluding industry
standard parts) of the landing gear, wing, fuselage, vertical or horizontal
stabilizer listed in the applicable purchase agreement for a specific model of
aircraft that is installed in the aircraft at time of delivery or is purchased
from Boeing by Customer as a spare part. The detailed SLP Component listing will
be in Supplemental Exhibit SLP1 to each Purchase Agreement.

2.   Service Life Policy.
     -------------------

     2.1  SLP Commitment. If a failure or defect is discovered in a SLP
Component within the time periods specified in Article 2.2 below, Boeing will,
at a price calculated pursuant to Article 3 below, Correct the SLP Component.

     2.2  SLP Policy Periods.

          2.2.1  The policy period for SLP Components initially installed on an
     aircraft is 12 years after the date of delivery of the aircraft.

          2.2.2  The policy period for SLP Components purchased from Boeing by
     Customer as spare parts is 12 years from delivery of such SLP Component or
     12 years from the date of delivery of the last aircraft produced by Boeing
     of a specific model, whichever first expires.

3.   Price.
     -----

     The price that Customer will pay for the Correction of a defective or
failed SLP Component will be calculated pursuant to the following formula:

          P  =  CT
                ---
                144

     where:

          P  =  price to Customer for the replacement part
          C  =  SLP Component sales price at time of Correction
          T  =  total age in months of the defective or failed SLP
                Component from the date of delivery to Customer to
                the date of discovery of such condition.

                                      C3-1
<PAGE>

4.   Conditions.
     ----------

     Boeing's obligations under this Policy are conditioned upon the following:

     4.1  Customer must notify Boeing in writing of the defect or failure within
three months after it is discovered.

     4.2  Customer must provide reasonable evidence that the claimed defect or
failure is covered by this Policy and if requested by Boeing, that such defect
or failure was not the result of (i) a defect or failure in a component not
covered by this Policy, (ii) an extrinsic force, (iii) an act or omission of
Customer, or (iv) operation or maintenance contrary to applicable governmental
regulations or Boeing's instructions.

     4.3  If return of a defective or failed SLP Component is practicable and
requested by Boeing, Customer will return such SLP Component to Boeing at
Boeing's expense.

     4.4  Customer's rights and remedies under this Policy are limited to the
receipt of a Correction at prices calculated pursuant to Article 3 above.

5.   Disclaimer and Release; Exclusion of Liabilities.
     ------------------------------------------------

     This Part 3 and the rights and remedies of Customer and the obligations of
Boeing are subject to the DISCLAIMER AND RELEASE and EXCLUSION OF CONSEQUENTIAL
AND OTHER DAMAGES provisions of Article 11 of Part 2 of this Exhibit C.

                                      C3-2
<PAGE>

                           PRODUCT ASSURANCE DOCUMENT

                      PART 4: SUPPLIER WARRANTY COMMITMENT

1.   Supplier Warranties and Supplier Patent and Copyright Indemnities.
     -----------------------------------------------------------------

     Boeing will use diligent efforts to obtain warranties and indemnities
against patent and copyright infringement enforceable by Customer from Suppliers
of Supplier Products (except for BFE and engines) installed on the aircraft at
the time of delivery that were selected and purchased by Boeing, but not
manufactured to Boeing's detailed design. Boeing will furnish copies of the
warranties and patent and copyright indemnities to Customer contained in
Supplier Product Support and Product Assurance Agreements, prior to the
scheduled delivery month of the first aircraft under the initial purchase
agreement to the AGTA.

2.   Boeing Assistance in Administration of Supplier Warranties.
     ----------------------------------------------------------

     Customer will be responsible for submitting warranty claims directly to
Suppliers; however, if Customer experiences problems enforcing any Supplier
warranty obtained by Boeing for Customer, Boeing will conduct an investigation
of the problem and assist Customer in the resolution of those claims.

3.   Boeing Support in Event of Supplier Default.
     -------------------------------------------

     3.1  If the Supplier defaults in the performance of a material obligation
under its warranty, and Customer provides evidence to Boeing that a default has
occurred, then Boeing will furnish the equivalent warranty terms as provided by
the defaulting Supplier.

     3.2  At Boeing's request, Customer will assign to Boeing, and Boeing will
be subrogated to, its rights against the Supplier provided by the Supplier
warranty.

                                      C4-1
<PAGE>

                           PRODUCT ASSURANCE DOCUMENT

                       PART 5: BOEING INTERFACE COMMITMENT

1.   Interface Problems.
     ------------------

     An Interface Problem is defined as a technical problem in the operation of
an aircraft or its systems experienced by Customer, the cause of which is not
readily identifiable by Customer but which Customer believes to be attributable
to either the design characteristics of the aircraft or its systems or the
workmanship used in the installation of Supplier Products. In the event Customer
experiences an Interface Problem, Boeing will, without additional charge to
Customer, promptly conduct an investigation and analysis to determine the cause
or causes of the Interface Problem. Boeing will promptly advise Customer at the
conclusion of its investigation of Boeing's opinion as to the causes of the
Interface Problem and Boeing's recommendation as to corrective action.

2.   Boeing Responsibility.
     ---------------------

     If Boeing determines that the Interface Problem is primarily attributable
to the design or installation of any Boeing Product, Boeing will Correct the
design or workmanship to the extent of any then-existing obligations of Boeing
under the provisions of the applicable Boeing Warranty or Boeing Service Life
Policy.

3.   Supplier Responsibility.
     -----------------------

     If Boeing determines that the Interface Problem is primarily attributable
to the design or installation of a Supplier Product, Boeing will assist Customer
in processing a warranty claim against the Supplier.

4.   Joint Responsibility.
     --------------------

     If Boeing determines that the Interface Problem is partially attributable
to the design or installation of a Boeing Product and partially to the design or
installation of a Supplier Product, Boeing will seek a solution to the Interface
Problem through the cooperative efforts of Boeing and the Supplier and will
promptly advise Customer of the resulting corrective actions and
recommendations.

5.   General.
     -------

     Customer will, if requested by Boeing, assign to Boeing any of its rights
against any supplier as Boeing may require to fulfill its obligations hereunder.

                                      C5-1
<PAGE>

6.   Disclaimer and Release; Exclusion of Liabilities.
     ------------------------------------------------

     This Part 5 and the rights and remedies of Customer and the obligations of
Boeing herein are subject to the DISCLAIMER AND RELEASE and EXCLUSION OF
CONSEQUENTIAL AND OTHER DAMAGES provisions of Article 11 of Part 2 of this
Exhibit C.

                                      C5-2
<PAGE>

                           PRODUCT ASSURANCE DOCUMENT

                    PART 6: BOEING INDEMNITIES AGAINST PATENT
                           AND COPYRIGHT INFRINGEMENT

1.   Indemnity Against Patent Infringement.
     -------------------------------------

     Boeing will defend and indemnify Customer with respect to all claims, suits
and liabilities arising out of any actual or alleged patent infringement through
Customer's use, lease or resale of any aircraft or any Boeing Product installed
on an aircraft at delivery.

2.   Indemnity Against Copyright Infringement.
     ----------------------------------------

     Boeing will defend and indemnify Customer with respect to all claims, suits
and liabilities arising out of any actual or alleged copyright infringement
through Customer's use, lease or resale of any Boeing created Materials and
Aircraft Software installed on an aircraft at delivery.

3.   Exceptions, Limitations and Conditions.
     --------------------------------------

     3.1  Boeing's obligation to indemnify Customer for patent infringement will
extend only to infringements in countries which, at the time of the
infringement, were party to and fully bound by either (a) Article 27 of the
Chicago Convention on International Civil Aviation of December 7, 1944, or (b)
the International Convention for the Protection of Industrial Property (Paris
Convention).

     3.2  Boeing's obligation to indemnify Customer for copyright infringement
is limited to infringements in countries which, at the time of the infringement,
are members of The Berne Union and recognize computer software as a "work" under
The Berne Convention.

     3.3  The indemnities provided under this Part 6 will not apply to any (i)
BFE, (ii) engines, (iii) Supplier Product (iv) Boeing Product used other than
for its intended purpose, or (v) Aircraft Software not created by Boeing.

     3.4  Customer must deliver written notice to Boeing (i) within 10 days
after Customer first receives notice of any suit or other formal action against
Customer and (ii) within 20 days after Customer first receives any other
allegation or written claim of infringement covered by this Part 6.

                                      C6-1
<PAGE>

     3.5  At any time, Boeing will have the right at its option and expense to:
(i) negotiate with any party claiming infringement, (ii) assume or control the
defense of any infringement allegation, claim, suit or formal action, (iii)
intervene in any infringement suit or formal action , and/or (iv) attempt to
resolve any claim of infringement by replacing an allegedly infringing Boeing
Product or Aircraft Software with a noninfringing equivalent.

     3.6  Customer will promptly furnish to Boeing all information, records and
assistance within Customer's possession or control which Boeing considers
relevant or material to any alleged infringement covered by this Part 6.

     3.7  Except as required by a final judgment entered against Customer by a
court of competent jurisdiction from which no appeals can be or have been filed,
Customer will obtain Boeing's written approval prior to paying, committing to
pay, assuming any obligation or making any material concession relative to any
infringement covered by these indemnities.

     3.8  Boeing will have no obligation or liability under this Part 6 for loss
of use, revenue or profit, or for any other incidental or consequential damages.
The obligations of Boeing and remedies of Customer in this Part 6 are exclusive
and in substitution for, and Customer hereby waives, releases and renounces all
other indemnities, obligations and liabilities of Boeing and all other rights,
claims and remedies of Customer against Boeing, express or implied, arising by
law or otherwise, with respect to any actual or alleged patent, copyright OR
OTHER INTELLECTUAL PROPERTY infringement or the like by any aircraft, AIRCRAFT
SOFTWARE, MATERIALS, TRAINING, SERVICES or other thing provided under this AGTA
and the applicaBLE PURCHASE AGREEMENT.

     3.9  For the purposes of this Part 6, "BOEING or Boeing" is defined as The
Boeing Company, its divisions, subsidiaries, affiliates, the assignees of each
and their respective directors, officers, employees and agents.

                                      C6-2
<PAGE>

                                     SAMPLE
                              Insurance Certificate

                               BROKER'S LETTERHEAD

[date]

Certificate of Insurance

ISSUED TO:   The Boeing Company
             Post Office Box 3707
             Mail Stop 13-57
             Seattle, Washington 98124
             Attn:  Manager - Aviation Insurance for
                    Vice President - Employee Benefits,
                     Insurance and Taxes

CC:          Boeing Commercial Airplane Group
             P.O. Box 3707
             Mail Stop 21-34
             Seattle, Washington 98124-2207
             U.S.A.
             Attn:  Vice President - Contracts

NAMED INSURED: #

We hereby certify that in our capacity as Brokers to the Named Insured, the
following described insurance is in force on this date:

Insurer                       Policy No.                         Participation
-------                       ----------                         -------------

POLICY PERIOD:  From [date and time of inception of the Policy(ies)] to [date
-------------   and time of expiration].

GEOGRAPHICAL LIMITS:  Worldwide (however, as respects "Aircraft Hull War and
-------------------   Allied Perils" Insurance, as agreed by Boeing).

                                     App. I
                                        1
<PAGE>

                                     SAMPLE
                              Insurance Certificate

AIRCRAFT INSURED:   All Boeing manufactured aircraft owned or operated by the
----------------    Named Insured which are the subject of the following
                    purchase agreement(s), entered into between The Boeing
                    Company and _________________ (hereinafter "Aircraft"):

                    Purchase Agreement No. ____ dated ______
                    Purchase Agreement No. ____ dated ______

COVERAGES:
---------

     1.   Aircraft "all risks" Hull (Ground and Flight)
          ---------------------------------------------
     2.   Aircraft Hull War and Allied Perils (as per LSW 555, or its successor
          ---------------------------------------------------------------------
          wording)
          --------
     3.   Airline Liability
          -----------------

Including, but not limited to, Bodily Injury, Property Damage, Aircraft
Liability, Liability War Risks, Passenger Legal Liability, Premises/Operations
Liability, Completed Operations/Products Liability, Baggage Legal Liability
(checked and unchecked), Cargo Legal Liability, Contractual Liability and
Personal Injury.

The above-referenced Airline Liability insurance coverage is subject to War and
Other Perils Exclusion Clause (AV48B) but all sections, other than section (b)
are reinstated as per AV52C, or their successor endorsements.

LIMITS OF LIABILITY:
-------------------

To the fullest extent of the Policy limits that the Named Insured carries from
the time of delivery of the first Aircraft under the first Purchase Agreement
listed under "Aircraft Insured" and thereafter at the inception of each policy
period, but in any event no less than the following:

Combined Single Limit Bodily Injury and Property Damage: U.S.$ any one
occurrence each Aircraft (with aggregates as applicable).

          (717-200)                             US$300,000,000
          (737-500/600)                         US$350,000,000
          (737-300/700)                         US$400,000,000
          (737-400)                             US$450,000,000
          (737-800)                             US$500,000,000
          (737-900)                             US$500,000,000
          (757-200)                             US$525,000,000
          (757-300)                             US$550,000,000
          (767-200)                             US$550,000,000
          (767-300)                             US$700,000,000
          (767-400ERX)                          US$750,000,000

                                     App. I
                                        2
<PAGE>

                                     SAMPLE
                              Insurance Certificate

          (777-200LR)                           US$800,000,000
          (MD-11)                               US$800,000,000
          (777-200/300)                         US$800,000,000
          (777-300ER)                           US$800,000,000
          (747-400)                             US$900,000,000

(In regard to all other models and/or derivatives, to be specified by Boeing).

(In regard to Personal Injury coverage, limits are US$25,000,000 any one
offense/aggregate.)

DEDUCTIBLES / SELF-INSURANCE
----------------------------

Any deductible and/or self-insurance amount (other than standard market
deductibles) are to be disclosed and agreed by Boeing.

SPECIAL PROVISIONS APPLICABLE TO BOEING:
---------------------------------------

It is certified that Insurers are aware of the terms and conditions of AGTA-*
and the following purchase agreements:

PA ______ dated _______
PA ______ dated _______
PA ______ dated _______

Each Aircraft manufactured by Boeing which is delivered to the Insured pursuant
to the applicable purchase agreement during the period of effectivity of the
policies represented by this Certificate will be covered to the extent specified
herein.

Insurers have agreed to the following:

     A.   In regard to Aircraft "all risks" Hull Insurance and Aircraft Hull War
and Allied Perils Insurance, Insurers agree to waive all rights of subrogation
or recourse against Boeing in accordance with AGTA-* which was incorporated by
reference into the applicable purchase agreement.

     B.   In regard to Airline Liability Insurance, Insurers agree:

          (1)  To include Boeing as an additional insured in accordance with
     Customer's undertaking in Article 8.2.1 of AGTA-* which was incorporated by
     reference into the applicable purchase agreement.

          (2)  To provide that such insurance will be primary and not
     contributory nor excess with respect to any other insurance available for
     the protection of Boeing;

                                     App. I
                                        3
<PAGE>

                                     SAMPLE
                              Insurance Certificate

          (3)  To provide that with respect to the interests of Boeing, such
     insurance shall not be invalidated or minimized by any action or inaction,
     omission or misrepresentation by the Insured or any other person or party
     (other than Boeing) regardless of any breach or violation of any warranty,
     declaration or condition contained in such policies;

          (4)  To provide that all provisions of the insurance coverages
     referenced above, except the limits of liability, will operate to give each
     Insured or additional insured the same protection as if there were a
     separate Policy issued to each.

     C.   In regard to all of the above referenced policies:

          (1)  Boeing will not be responsible for payment, set-off, or
     assessment of any kind or any premiums in connection with the policies,
     endorsements or coverages described herein;

          (2)  If a policy is canceled for any reason whatsoever, or any
     substantial change is made in the coverage which affects the interests of
     Boeing or if a policy is allowed to lapse for nonpayment of premium, such
     cancellation, change or lapse shall not be effective as to Boeing for
     thirty (30) days (in the case of war risk and allied perils coverage seven
     (7) days after sending, or such other period as may from time to time be
     customarily obtainable in the industry) after receipt by Boeing of written
     notice from the Insurers or the authorized representatives or Broker of
     such cancellation, change or lapse; and

          (3)  For the purposes of the Certificate, "Boeing" is defined as The
     Boeing Company, its divisions, subsidiaries, affiliates, the assignees of
     each and their respective directors, officers, employees and agents.

Subject to the terms, conditions, limitations and exclusions of the relative
policies.

(signature)
 ---------

(typed name)

(title)

                                     App. I
                                        4
<PAGE>

                                     SAMPLE
                          Purchase Agreement Assignment

     THIS PURCHASE AGREEMENT ASSIGNMENT (Assignment) dated as of ________ 20__
between MidWest Express, a company organized under the laws of ________________
(Assignor) and ________________________, a company organized under the laws of
________________ (Assignee). Capitalized terms used herein without definition
will have the same meaning as in the Boeing Purchase Agreement.

     Assignor and The Boeing Company, a Delaware corporation (Boeing), are
parties to the Boeing Purchase Agreement, providing, among other things, for the
sale by Boeing to Assignor of certain aircraft, engines and related equipment,
including the Aircraft.

     Assignee wishes to acquire the Aircraft and certain rights and interests
under the Boeing Purchase Agreement and Assignor, on the following terms and
conditions, is willing to assign to Assignee certain of Assignor's rights and
interests under the Boeing Purchase Agreement. Assignee is willing to accept
such assignment.

It is agreed as follows:

     1.   For all purposes of this Assignment, the following terms will have the
following meanings:

     Aircraft -- one Boeing Model ______ aircraft, bearing manufacturer's serial
number _______, together with all engines and parts installed on such aircraft
on the Delivery Date.

     Boeing -- Boeing shall include Boeing Sales Corporation (a wholly-owned
subsidiary of Boeing), a Guam corporation, and its successors and assigns.

     Boeing Purchase Agreement -- Purchase Agreement No. ________ dated as of
____________ between Boeing and Assignor, as amended, but excluding
______________, providing, among other things, for the sale by Boeing to
Assignor of the Aircraft, as said agreement may be further amended to the extent
permitted by its terms. The Purchase Agreement incorporated by reference
Aircraft General Terms Agreement AGTA/____ (AGTA).

     Delivery Date -- the date on which the Aircraft is delivered by Boeing to
Assignee pursuant to and subject to the terms and conditions of the Boeing
Purchase Agreement and this Assignment.

     2.   Assignor does hereby assign to Assignee all of its rights and
interests in and to the Boeing Purchase Agreement, as and to the extent that the
same relate to the Aircraft and the purchase and operation thereof, except as
and to the extent expressly reserved below, including, without limitation, in
such assignment:  [TO BE COMPLETED BY THE PARTIES.]

                                     App. II
                                        1
<PAGE>

                                     SAMPLE
                          Purchase Agreement Assignment

     {EXAMPLES

     (a)  the right upon valid tender to purchase the Aircraft pursuant to the
          Boeing Purchase Agreement subject to the terms and conditions thereof
          and the right to take title to the Aircraft and to be named the
          "Buyer" in the bill of sale for the Aircraft;

     (b)  the right to accept delivery of the Aircraft;

     (c)  all claims for damages arising as a result of any default under the
          Boeing Purchase Agreement in respect of the Aircraft;

     (d)  all warranty and indemnity provisions contained in the Boeing Purchase
          Agreement, and all claims arising thereunder, in respect of the
          Aircraft; and

     (e)  any and all rights of Assignor to compel performance of the terms of
          the Boeing Purchase Agreement in respect of the Aircraft.}

Reserving exclusively to Assignor, however:

     {EXAMPLES

     (i)  all Assignor's rights and interests in and to the Boeing Purchase
          Agreement as and to the extent the same relates to aircraft other than
          the Aircraft, or to any other matters not directly pertaining to the
          Aircraft;

     (ii) all Assignor's rights and interests in or arising out of any advance
          or other payments or deposits made by Assignor in respect of the
          Aircraft under the Boeing Purchase Agreement and any amounts credited
          or to be credited or paid or to be paid by Boeing in respect of the
          Aircraft;

     (iii) the right to obtain services, training, information and demonstration
          and test flights pursuant to the Boeing Purchase Agreement; and

     (iv) the right to maintain plant representatives at Boeing's plant pursuant
          to the Boeing Purchase Agreement.}

Assignee hereby accepts such assignment.

     3.   Notwithstanding the foregoing, so long as no event of default or
termination under [specify document] has occurred and is continuing, Assignee
hereby authorizes Assignor, to the exclusion of Assignee, to exercise in
Assignor's name all rights and powers of Customer under the Boeing Purchase
Agreement in respect of the Aircraft.

                                     App. II
                                        2
<PAGE>

                                     SAMPLE
                          Purchase Agreement Assignment

     4.   For all purposes of this Assignment, Boeing will not be deemed to have
knowledge of or need recognize the occurrence, continuance or the discontinuance
of any event of default or termination under [specify document] unless and until
Boeing receives from Assignee written notice thereof, addressed to its Vice
President - Contracts, Boeing Commercial Airplane Group at P.O. Box 3707,
Seattle, Washington 98124, if by mail, or to 32-9430 Answerback BOEINGREN RNTN,
if by telex. Until such notice has been given, Boeing will be entitled to deal
solely and exclusively with Assignor. Thereafter, until Assignee has provided
Boeing written notice that any such events no longer continue, Boeing will be
entitled to deal solely and exclusively with Assignee. Boeing may act with
acquittance and conclusively rely on any such notice.

     5.   It is expressly agreed that, anything herein contained to the contrary
notwithstanding: (a) prior to the Delivery Date Assignor will perform its
obligations with respect to the Aircraft to be performed by it on or before such
delivery, (b) Assignor will at all times remain liable to Boeing under the
Boeing Purchase Agreement to perform all obligations of Customer thereunder to
the same extent as if this Assignment had not been executed, and (c) the
exercise by Assignee of any of the assigned rights will not release Assignor
from any of its obligations to Boeing under the Boeing Purchase Agreement,
except to the extent that such exercise constitutes performance of such
obligations.

     6.   Notwithstanding anything contained in this Assignment to the contrary
(but without in any way releasing Assignor from any of its obligations under the
Boeing Purchase Agreement), Assignee confirms for the benefit of Boeing that,
insofar as the provisions of the Boeing Purchase Agreement relate to the
Aircraft, in exercising any rights under the Boeing Purchase Agreement, or in
making any claim with respect to the Aircraft or other things (including,
without limitation, Material, training and services) delivered or to be
delivered pursuant to the Boeing Purchase Agreement, the terms and conditions of
the Boeing Purchase Agreement, including, without limitation, the DISCLAIMER AND
RELEASE and EXCLUSION OF CONSEQUENTIAL AND OTHER DAMAGES in Article 11 of Part 2
of Exhibit C to the Aircraft General Terms Agreement which was incorporated by
reference into the Boeing Purchase Agreement and the insurance provisions in
Article 8.2 of the Aircraft General Terms Agreement which was incorporated by
reference into the Boeing Purchase Agreement therein, will apply to and be
binding on Assignee to the same extent as if Assignee had been the original
"Customer" thereunder. Assignee further agrees, expressly for the benefit of
Boeing, upon the written request of Boeing, Assignee will promptly execute and
deliver such further assurances and documents and take such further action as
Boeing may reasonably request in order to obtain the full benefits of Assignee's
agreements in this paragraph.

     7.   Nothing contained herein will subject Boeing to any liability to which
it would not otherwise be subject under the Boeing Purchase Agreement or modify
in any respect the contract rights of Boeing thereunder, or require Boeing to
divest itself of title to or possession of the Aircraft or other things until
delivery thereof and payment therefor as provided therein.

                                     App. II
                                        3
<PAGE>

                                     SAMPLE
                          Purchase Agreement Assignment

     8.   Notwithstanding anything in this Assignment to the contrary, after
receipt of notice of any event of default or termination under [specify
document], Boeing will continue to owe to Assignor moneys in payment of claims
made or obligations arising before such notice, which moneys may be subject to
rights of set-off available to Boeing under applicable law. Similarly, after
receipt of notice that such event of default or termination no longer continues,
Boeing will continue to owe to Assignee moneys in payment of claims made or
obligations arising before such notice, which moneys may be subject to rights of
set-off available to Boeing under applicable law.

     9.   Effective at any time after an event of default has occurred, and for
so long as such event of default is continuing, Assignor does hereby constitute
Assignee, Assignor's true and lawful attorney, irrevocably, with full power (in
the name of Assignor or otherwise) to ask, require, demand, receive, and give
acquittance for any and all moneys and claims for moneys due and to become due
under or arising out of the Boeing Purchase Agreement in respect of the
Aircraft, to the extent assigned by this Assignment.

     10.  Assignee agrees, expressly for the benefit of Boeing and Assignor that
it will not disclose, directly or indirectly, any terms of the Boeing Purchase
Agreement; provided, that Assignee may disclose any such information (a) to its
special counsel and public accountants, (b) as required by applicable law to be
disclosed or to the extent that Assignee may have received a subpoena or other
written demand under color of legal right for such information, but it will
first, as soon as practicable upon receipt of such requirement or demand,
furnish an explanation of the basis thereof to Boeing, and will afford Boeing
reasonable opportunity, to obtain a protective order or other reasonably
satisfactory assurance of confidential treatment for the information required to
be disclosed, and (c) to any bona fide potential purchaser or lessee of the
Aircraft. Any disclosure pursuant to (a) and (c) above will be subject to
execution of a confidentiality agreement substantially similar to this paragraph
10.

     11.  This Assignment may be executed by the parties in separate
counterparts, each of which when so executed and delivered will be an original,
but all such counterparts will together constitute but one and the same
instrument.

                                     App. II
                                        4
<PAGE>

                                     SAMPLE
                          Purchase Agreement Assignment

     12.  This Assignment will be governed by, and construed in accordance with,
the laws of [ ____________________ ].

_______________________________                 _______________________________
as Assignor                                     as Assignee

By ____________________________                 By ____________________________

Name:                                           Name:

Title:                                          Title:

[If the Assignment is further assigned by Assignee in connection with a
financing, the following language needs to be included.]

Attest:

The undersigned, as [Indenture Trustee/Agent for the benefit of the Loan
Participants/Mortgagee] and as assignee of, and holder of a security interest
in, the estate, right, and interest of the Assignee in and to the foregoing
Purchase Agreement Assignment and the Purchase Agreement pursuant to the terms
of a certain [Trust Indenture/Mortgage] dated as of _____________, agrees to the
terms of the foregoing Purchase Agreement Assignment and agrees that its rights
and remedies under such [Trust Indenture/Mortgage] shall be subject to the terms
and conditions of the foregoing Purchase Agreement Assignment, including,
without limitation, paragraph 6.

[Name of Entity],
 --------------
as Indenture Trustee/Agent

By:____________________________

Name:

Title:

                                     App. II
                                        5
<PAGE>

                                     SAMPLE
                          Purchase Agreement Assignment

CONSENT AND AGREEMENT OF
THE BOEING COMPANY

     THE BOEING COMPANY, a Delaware corporation (Boeing), hereby acknowledges
notice of and consents to the foregoing Purchase Agreement Assignment
(Assignment). Boeing confirms to Assignee that: all representations, warranties,
indemnities and agreements of Boeing under the Boeing Purchase Agreement with
respect to the Aircraft will, subject to the terms and conditions thereof and of
the Assignment, inure to the benefit of Assignee to the same extent as if
Assignee were originally named "Customer" therein.

     This Consent and Agreement will be governed by, and construed in accordance
with, the law of the State of Washington, excluding the conflict of laws
principles thereof.

Dated as of ____________________, 20___.

THE BOEING COMPANY

By ____________________________
Name:
Title:  Attorney-in-Fact

Aircraft Manufacturer's Serial Number(s) ____________

                                     App. II
                                        6
<PAGE>

                                     SAMPLE
                            Post-Delivery Sale Notice

Boeing Commercial Airplane Group
P.O. Box 3707
Seattle, Washington  98124-2207

Attention:  Vice President - Contracts
            Mail Stop 21-34

Ladies and Gentlemen:

In connection with the sale by MidWest Express (Seller) to ________________
(Purchaser) of the aircraft identified below, reference is made to Purchase
Agreement No. _____ dated as of ___________, 20__, between The Boeing Company
(Boeing) and Seller (the Purchase Agreement) under which Seller purchased
certain Boeing Model ________ aircraft, including the aircraft bearing
Manufacturer's Serial No.(s) ______________________ (the Aircraft). The Purchase
Agreement incorporated by reference Aircraft General Terms Agreement AGTA-MWE
(AGTA).

Capitalized terms used herein without definition will have the same meaning as
in the Purchase Agreement.

Seller has sold the Aircraft, including in that sale the transfer to Purchaser
of all remaining rights related to the Aircraft under the Purchase Agreement. To
accomplish this transfer of rights, as authorized by the provisions of the
Purchase Agreement:

(1) Purchaser acknowledges it has reviewed the Purchase Agreement and agrees to
be bound by and comply with all applicable terms and conditions of the Purchase
Agreement, including, without limitation, the DISCLAIMER AND RELEASE and
EXCLUSION OF CONSEQUENTIAL AND OTHER DAMAGES in Article 11 of Part 2 of Exhibit
C to the AGTA and the insurance provisions in Article 8.2 of the AGTA. Purchaser
further agrees upon the written request of Boeing, to promptly execute and
deliver such further assurances and documents and take such further action as
Boeing may reasonably request in order to obtain the full benefits of
Purchaser's agreements in this paragraph; and

(2) Seller will remain responsible for any payments due Boeing as a result of
obligations relating to the Aircraft incurred by Seller to Boeing prior to the
effective date of this letter.

                                    App. III
                                        1
<PAGE>

                                     SAMPLE
                            Post-Delivery Sale Notice

We request that Boeing acknowledge receipt of this letter and confirm the
transfer of rights set forth above by signing the acknowledgment and forwarding
one copy of this letter to each of the undersigned.

Very truly yours,

MidWest Express                                 Purchaser

By                                              By
   ----------------------------                    ----------------------------

Its                                             Its
    ---------------------------                     ---------------------------

Dated                                           Dated
      -------------------------                       -------------------------

Receipt of the above letter is acknowledged and transfer of rights under the
Purchase Agreement with respect to the Aircraft is confirmed, effective as of
this date.

THE BOEING COMPANY

By
   ----------------------------

Its  Attorney-in-Fact
    ---------------------------

Dated
      -------------------------

Aircraft Manufacturer's Serial Number ____________

                                    App. III
                                        2
<PAGE>

                                     SAMPLE
                           Post-Delivery Lease Notice

Boeing Commercial Airplane Group
P.O. Box 3707
Seattle, Washington  98124-2207

Attention:   Vice President - Contracts
             Mail Stop 21-34

Ladies and Gentlemen:

In connection with the lease by MidWest Express (Lessor) to ___________ (Lessee)
of the aircraft identified below, reference is made to Purchase Agreement No.
____ dated as of ________, 20__, between The Boeing Company (Boeing) and Lessor
(the Purchase Agreement) under which Lessor purchased certain Boeing Model
_______ aircraft, including the aircraft bearing Manufacturer's Serial No.(s)
___________________ (the Aircraft). The Purchase Agreement incorporated by
reference Aircraft General Terms Agreement AGTA-MWE (AGTA).

Capitalized terms used herein without definition will have the same meaning as
in the Purchase Agreement.

Lessor has leased the Aircraft, including in that lease the transfer to Lessee
of all remaining rights related to the Aircraft under the Purchase Agreement. To
accomplish this transfer of rights, as authorized by the provisions of the
Purchase Agreement:

(1) Lessor authorizes Lessee to exercise, to the exclusion of Lessor, all rights
and powers of Lessor with respect to the remaining rights related to the
Aircraft under the Purchase Agreement. This authorization will continue until
Boeing receives written notice from Lessor to the contrary, addressed to Vice
President - Contracts, Mail Stop 21-34, Boeing Commercial Airplane Group, P.O.
Box 3707, Seattle, Washington 98124-2207. Until Boeing receives such notice,
Boeing is entitled to deal exclusively with Lessee with respect to the Aircraft
under the Purchase Agreement. With respect to the rights and obligations of
Lessor under the Purchase Agreement, all actions taken or agreements entered
into by Lessee during the period prior to Boeing's receipt of this notice are
final and binding on Lessor. Further, any payments made by Boeing as a result of
claims made by Lessee will be made to the credit of Lessee.

(2) Lessee accepts the authorization above, acknowledges it has reviewed the
Purchase Agreement and agrees to be bound by and comply with all applicable
terms and conditions of the Purchase Agreement including, without limitation,
the DISCLAIMER AND RELEASE and EXCLUSION OF CONSEQUENTIAL AND OTHER DAMAGES in
Article 11 of Part 2 of Exhibit C AGTA and the insurance provisions in Article
8.2 of the AGTA. Lessee further agrees, upon the written request of Boeing, to
promptly execute and deliver such further assurances and documents and take such
further action as

                                     App. IV
                                        1
<PAGE>

                                     SAMPLE
                           Post-Delivery Lease Notice

Boeing may reasonably request in order to obtain the full benefits of Lessee's
agreements in this paragraph.

(3) Lessor will remain responsible for any payments due Boeing as a result of
obligations relating to the Aircraft incurred by Lessor to Boeing prior to the
effective date of this Notice.

We request that Boeing acknowledges receipt of this letter and confirm the
transfer of rights set forth above by signing the acknowledgment and forwarding
one copy of this letter to each of the undersigned.

Very truly yours,

MidWest Express                                 Lessee

By                                              By
   ----------------------------                    ----------------------------

Its                                             Its
    ---------------------------                     ---------------------------

Dated                                           Dated
      -------------------------                       -------------------------

Receipt of the above letter is acknowledged and transfer of rights under the
Purchase Agreement with respect to the Aircraft is confirmed, effective as of
this date.

THE BOEING COMPANY

By
   ----------------------------

Its
    ---------------------------

Dated
      -------------------------

Aircraft Manufacturer's Serial Number ____________

                                     App. IV
                                        2
<PAGE>

                                     SAMPLE
                         Purchaser's/Lessee's Agreement

Boeing Commercial Airplane Group
P. O. Box 3707
Seattle, Washington  98124-2207

Attention         Vice President - Contracts
                  Mail Stop 21-34

Ladies and Gentlemen:

In connection with the sale/lease by MidWest Express (Seller/Lessor) to
_______________________ (Purchaser/Lessee) of the aircraft identified below,
reference is made to the following documents:

(i) Purchase Agreement No. _____ dated as of ___________, 20__, between The
Boeing Company (Boeing) and Seller/Lessor (the Purchase Agreement) under which
Seller/Lessor purchased certain Boeing Model ________ aircraft, including the
aircraft bearing Manufacturer's Serial No.(s) ______________________ (the
Aircraft); and

(ii) Aircraft Sale/Lease Agreement dated as of ___________, 20__, between
Seller/Lessor and Purchaser/Lessee (the Aircraft Agreement) under which
Seller/Lessor is selling/leasing the Aircraft.

Capitalized terms used herein without definition will have the same meaning as
in the Aircraft Agreement.

1.   Seller/Lessor has sold/leased the Aircraft under the Aircraft Agreement,
including therein a form of exculpatory clause protecting Seller/ Lessor from
liability for loss of or damage to the aircraft, and/or related incidental or
consequential damages, including without limitation loss of use, revenue or
profit.

2.   Disclaimer and Release; Exclusion of Liabilities

     2.1  In accordance with Seller/Lessor's obligation under Article 9.5 of
AGTA-MWE which was incorporated by reference into the Purchase Agreement,
Purchaser/Lessee hereby agrees that:

     2.2  DISCLAIMER AND RELEASE. IN CONSIDERATION OF THE SALE/LEASE OF THE
AIRCRAFT, PURCHASER/LESSEE HEREBY WAIVES, RELEASES AND RENOUNCES ALL WARRANTIES,
OBLIGATIONS AND LIABILITIES OF BOEING AND ALL OTHER RIGHTS, CLAIMS AND REMEDIES
OF PURCHASER/LESSEE AGAINST BOEING, EXPRESS OR IMPLIED, ARISING BY LAW OR
OTHERWISE, WITH RESPECT TO ANY NONCONFORMANCE OR DEFECT IN ANY AIRCRAFT, BOEING
PRODUCT, MATERIALS, TRAINING,

                                     App. V
                                        1
<PAGE>

                                     SAMPLE
                         Purchaser's/Lessee's Agreement

SERVICES OR OTHER THING PROVIDED UNDER THE AIRCRAFT AGREEMENT, INCLUDING, BUT
NOT LIMITED TO:

          (A)  ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS;

          (B)  ANY IMPLIED WARRANTY ARISING FROM COURSE OF PERFORMANCE, COURSE
               OF DEALING OR USAGE OF TRADE;

          (C)  ANY OBLIGATION, LIABILITY, RIGHT, CLAIM OR REMEDY IN TORT,
               WHETHER OR NOT ARISING FROM THE NEGLIGENCE OF BOEING; AND

          (D)  ANY OBLIGATION, LIABILITY, RIGHT, CLAIM OR REMEDY FOR LOSS OF OR
               DAMAGE TO ANY AIRCRAFT.

     2.3  EXCLUSION OF CONSEQUENTIAL AND OTHER DAMAGES. BOEING WILL HAVE NO
OBLIGATION OR LIABILITY, WHETHER ARISING IN CONTRACT (INCLUDING WARRANTY), TORT,
WHETHER OR NOT ARISING FROM THE NEGLIGENCE OF BOEING, OR OTHERWISE, FOR LOSS OF
USE, REVENUE OR PROFIT, OR FOR ANY OTHER INCIDENTAL OR CONSEQUENTIAL DAMAGES
WITH RESPECT TO ANY NONCONFORMANCE OR DEFECT IN ANY AIRCRAFT, MATERIALS,
TRAINING, SERVICES OR OTHER THING PROVIDED UNDER THE AIRCRAFT AGREEMENT.

     2.4  Definitions. For the purpose of this paragraph 2, "BOEING" or "Boeing"
is defined as The Boeing Company, its divisions, subsidiaries, affiliates, the
assignees of each, and their respective directors, officers, employees and
agents.

MidWest Express (Seller/Lessor)                 Purchaser/Lessee

By                                              By
   ----------------------------                    ----------------------------

Its                                             Its
    ---------------------------                     ---------------------------

Dated                                           Dated
      -------------------------                       -------------------------

                                     App. V
                                        2
<PAGE>

                                     SAMPLE
                     Owner Appointment of Agent - Warranties

Boeing Commercial Airplane Group
P.O. Box 3707
Seattle, Washington  98124-2207

Attention:        Vice President - Contracts
                  Mail Stop 21-34

Ladies and Gentlemen:

1. Reference is made to Purchase Agreement No. ____ dated as of ________, 20__,
between The Boeing Company (Boeing) and MidWest Express (Customer) (the Purchase
Agreement), under which Customer purchased certain Boeing Model ________
aircraft including the aircraft bearing Manufacturer's Serial No.(s)
_____________ (the Aircraft). The Purchase Agreement incorporated by reference
Aircraft General Terms Agreement AGTA-MWE (AGTA).

Capitalized terms used herein without definition will have the same meaning as
in the Purchase Agreement.

To accomplish the appointment of an agent, Customer confirms:

A. Customer has appointed ____________________ as agent (Agent) to act directly
with Boeing with respect to the remaining warranties under the Purchase
Agreement and requests Boeing to treat Agent as Customer for the administration
of claims with respect to such warranties; provided however, Customer remains
liable to Boeing to perform the obligations of Customer under the Purchase
Agreement.

B. Boeing may continue to deal exclusively with Agent concerning the matters
described herein unless and until Boeing receives written notice from Customer
to the contrary, addressed to Vice President - Contracts, Mail Stop 21-34,
Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124-2207,
U.S.A. With respect to the rights and obligations of Customer under the Purchase
Agreement, all actions taken by Agent or agreements entered into by Agent during
the period prior to Boeing's receipt of such notice are final and binding on
Customer. Further, any payments made by Boeing as a result of claims made by
Agent will be made to the credit of Agent unless otherwise specified when each
claim is submitted.

C. Customer will remain responsible for any payments due Boeing as a result of
obligations relating to the Aircraft incurred by Customer to Boeing prior to the
effective date of this Notice.

                                     App. VI
                                        1
<PAGE>

                                     SAMPLE
                     Owner Appointment of Agent - Warranties

We request that Boeing acknowledge receipt of this letter and confirm the
appointment of Agent as stated above by signing the acknowledgment and
forwarding one copy of this letter to each of the undersigned.

Very truly yours,

MidWest Express

By
     -------------------------------

                                     App. VI
                                        2
<PAGE>

                                     SAMPLE
                     Owner Appointment of Agent - Warranties

                                AGENT'S AGREEMENT

Agent accepts the appointment as stated above, acknowledges it has reviewed the
Purchase Agreement and agrees that, in exercising any rights or making any
claims thereunder, Agent will be bound by and comply with all applicable terms
and conditions of the Purchase Agreement including, without limitation, the
DISCLAIMER AND RELEASE and EXCLUSION OF CONSEQUENTIAL AND OTHER DAMAGES in
Article 11 of Part 2 of Exhibit C to the AGTA. Agent further agrees, upon the
written request of Boeing, to promptly execute and deliver such further
assurances and documents and take such further action as Boeing may reasonably
request in order to obtain the full benefits of the warranties under the
Purchase Agreement.

Very truly yours,

Agent

By
   ----------------------------

Its
    ---------------------------

Dated
      -------------------------

Receipt of the above letter is acknowledged and the appointment of Agent with
respect to the above-described rights under the Purchase Agreement is confirmed,
effective as of this date.

THE BOEING COMPANY

By
   ----------------------------

Its
    ---------------------------

Dated
      -------------------------

Aircraft Manufacturer's Serial Number __________

                                     App. VI
                                        3
<PAGE>

                                     SAMPLE
                      Contractor Confidentiality Agreement

Boeing Commercial Airplane Group
P.O. Box 3707
Seattle, Washington  98124-2207

Attention:        Vice President - Contracts
                  Mail Stop 21-34

Ladies and Gentlemen:

This Agreement is entered into between ____________________ (Contractor) and
MidWest Express (Customer) and will be effective as of the date stated below.

In connection with Customer's provision to Contractor of certain Materials,
Proprietary Materials and Proprietary Information, reference is made to Purchase
Agreement No. _____ dated as of _______ , 20___ between The Boeing Company
(Boeing) and Customer.

Capitalized terms used herein without definition will have the same meaning as
in the Purchase Agreement.

Boeing has agreed to permit Customer to make certain Materials, Proprietary
Materials and Proprietary Information relating to Customer's Boeing Model
________ aircraft, Manufacturer's Serial Number ______, Registration No.
________ (the Aircraft) available to Contractor in connection with Customer's
contract with Contractor (the Contract) to maintain/repair/modify the Aircraft.
As a condition of receiving the Proprietary Materials and Proprietary
Information, Contractor agrees as follows:

1.   For purposes of this Agreement:

     "Aircraft Software" means software that is installed and used in the
operation of an Aircraft.

     "Materials" are defined as any and all items that are created by Boeing or
a third party, which are provided directly or indirectly from Boeing and serve
primarily to contain, convey or embody information. Materials may include either
tangible embodiments (for example, documents or drawings), or intangible
embodiments (for example, software and other electronic forms) of information
but excludes Aircraft Software.

     "Proprietary Information" means any and all proprietary, confidential
and/or trade secret information owned by Boeing or a Third Party which is
contained, conveyed or embodied in Proprietary Materials.

     "Proprietary Materials" means Materials that contain, convey, or embody
Proprietary Information.

                                    App. VII
                                        1
<PAGE>

                                     SAMPLE
                      Contractor Confidentiality Agreement

     "Third Party" means anyone other than Boeing, Customer and Contractor.

2. Boeing has authorized Customer to grant to Contractor a worldwide,
non-exclusive, personal and nontransferable license to use Proprietary Materials
and Proprietary Information, owned by Boeing, internally in connection with
performance of the Contract or as may otherwise be authorized by Boeing in
writing. Contractor will keep confidential and protect from disclosure to any
person, entity or government agency, including any person or entity affiliated
with Contractor, all Proprietary Materials and Proprietary Information.
Individual copies of all Materials are provided to Contractor subject to
copyrights therein, and all such copyrights are retained by Boeing or, in some
cases, by Third Parties. Contractor is authorized to make copies of Materials
(except for Materials bearing the copyright legend of a Third Party) provided,
however, Contractor preserves the restrictive legends and proprietary notices on
all copies. All copies of Proprietary Materials will belong to Boeing and be
treated as Proprietary Materials under this Agreement.

3. Contractor specifically agrees not to use Proprietary Materials or
Proprietary Information in connection with the manufacture or sale of any part
or design. Unless otherwise agreed with Boeing in writing, Proprietary Materials
and Proprietary Information may be used by Contractor only for work on the
Aircraft for which such Proprietary Materials have been specified by Boeing.
Customer and Contractor recognize and agree that they are responsible for
ascertaining and ensuring that all Materials are appropriate for the use to
which they are put.

4. Contractor will not attempt to gain access to information by reverse
engineering, decompiling, or disassembling any portion of any software provided
to Contractor pursuant to this Agreement.

5. Upon Boeing's request at any time, Contractor will promptly return to Boeing
(or, at Boeing's option, destroy) all Proprietary Materials, together with all
copies thereof and will certify to Boeing that all such Proprietary Materials
and copies have been so returned or destroyed.

6. To the extent required by a government regulatory agency having jurisdiction
over Contractor, Customer or the Aircraft, Contractor is authorized to provide
Proprietary Materials and disclose Proprietary Information to the agency for the
agency's use in connection with Contractor's, authorized use of such Proprietary
Materials and/or Proprietary Information in connection with Contractor's
maintenance, repair, or modification of the Aircraft. Contractor agrees to take
reasonable steps to prevent such agency from making any distribution or
disclosure, or additional use of the Proprietary Materials and Proprietary
Information so provided or disclosed. Contractor further agrees to promptly
notify Boeing upon learning of any (i) distribution, disclosure, or additional
use by such agency, (ii) request to such agency for distribution, disclosure, or
additional use, or (iii) intention on the part of such agency to distribute,
disclose, or make additional use of the Proprietary Materials or Proprietary
Information.

                                    App. VII
                                        2
<PAGE>

                                     SAMPLE
                      Contractor Confidentiality Agreement

7. Boeing is a third-party beneficiary under this Agreement, and Boeing may
enforce any and all of the provisions of the Agreement directly against
Contractor. Contractor hereby submits to the jurisdiction of the Washington
state courts and the United States District Court for the Western District of
Washington with regard to any claims Boeing may make under this Agreement. It is
agreed that Washington law (excluding Washington's conflict-of-law principles)
governs this Agreement.

8. No disclosure or physical transfer by Boeing or Customer to Contractor, of
any Proprietary Materials or Proprietary Information covered by this Agreement
will be construed as granting a license, other than as expressly set forth in
this Agreement or any ownership right in any patent, patent application,
copyright or proprietary information.

9. The provisions of this Agreement will apply notwithstanding any markings or
legends, or the absence thereof, on any Proprietary Materials.

10. This Agreement is the entire agreement of the parties regarding the
ownership and treatment of Proprietary Materials and Proprietary Information,
and no modification of this Agreement will be effective as against Boeing unless
in writing signed by authorized representatives of Contractor, Customer and
Boeing.

11. Failure by either party to enforce any of the provisions of this Agreement
will not be construed as a waiver of such provisions. If any of the provision of
this Agreement is held unlawful or otherwise ineffective by a court of competent
jurisdiction, the remainder of the Agreement will remain in full force.

ACCEPTED AND AGREED TO this

Date: _____________________, 20___

MidWest Express                               Contractor

By                                            By
     -----------------------------                 -----------------------------

Its                                           Its
     -----------------------------                 -----------------------------

                                    App. VII
                                        3
<PAGE>

6-1162-RCN-1483

Midwest Express Airlines, Inc.
766 South Howell Avenue
Oak Creek, Wisconsin

Subject:     Maintenance Cost Protection Program

Reference:   Purchase Agreement No. 2371 (the Purchase Agreement) between The
             McDonnell Douglas Corporation a wholly-owned subsidiary of The
             Boeing Company (MDC) and Midwest Express (Customer) relating to
             Model 717-2BL aircraft (the Aircraft)

This Letter Agreement amends the Purchase Agreement and Exhibit C of the AGTA.
All terms used but not defined in this Letter Agreement have the same meaning as
in the Purchase Agreement and AGTA.

1.   Intent

The Airframe Maintenance Cost Protection Program described in this Letter
Agreement (the Program) is intended to address Customer's concerns regarding
airframe maintenance costs. The Program is based on a projection by MDC of
target costs for airframe maintenance. These target costs are developed at the
time of Aircraft purchase using Customer's forecast of its operation of the
Aircraft. Target costs will be adjusted during the Program to reflect Customer's
actual operation of the Aircraft. Customer's actual costs will be compared
against these adjusted target costs and MDC will take corrective action if the
Program targets are not met.

2.   Definitions

Covered Aircraft: Each of the Aircraft operated by Customer on Customer's routes
during the Program Term.

Program Term: The ten (10) consecutive years commencing on the first day of the
calendar quarter in which the first Covered Aircraft is delivered by MDC to
Customer.

Covered Maintenance: Labor performed and materials used in the maintenance of
the airframe and component elements of the Covered Aircraft (excluding Engines
and Engine parts provided by the Engine manufacturer and the Engine
manufacturer's suppliers) where the maintenance is performed as part of a
maintenance program approved by Customer's regulatory authority. These airframe
and component elements are defined in the Air Transport Association of America
(ATA), Specification No. 100, ("Specification for Manufacturer's

<PAGE>

6-1162-RCN-1483
Page 2

Technical Data," dated 1984) as aircraft systems 5, 7 through 11, relevant
sections of 12 and 20, 21 through 57, 71, and 73 through 80. All labor and
materials must be properly charged to the following work descriptions:

Scheduled Maintenance: All routine and required non-routine or corrective
maintenance performed by Customer during scheduled checks and line maintenance.

Non-Scheduled Maintenance:  All non-scheduled required maintenance.

Repair and Overhaul: Any required repair or overhaul of rotable or repairable
systems, accessories, equipment or parts.

Modifications: Modifications required to make changes recommended by MDC or MDC
Suppliers pursuant to paragraphs 4.3 and 5.1 herein.

Actual Maintenance Cost: The total cost incurred by Customer related to
performing Covered Maintenance, and is the sum of three components; (i) the
Direct Airframe Material Cost Component, (ii) the Direct Airframe Labor Cost
Component, and (iii) the Subcontracted Airframe Cost Component.

Direct Airframe Material Cost Component (Direct Material): The net actual cost
paid by Customer for materials required to perform the Covered Maintenance,
exclusive of those cost and/or other charges as set forth in paragraph 5.5 which
may be added to the manufacturer's standard price.

Direct Airframe Labor Cost Component (Direct Labor):  The product of:

     (i) Labor Hours. The hours actually expended by Customer in performing the
     Covered Maintenance, exclusive of time consumed by employees while waiting
     for work, traveling to or from work, training, vacation, sick leave, or in
     any other similar absences from the actual maintenance work,

     and

     (ii) Labor Rate. The average direct hourly labor rate (excluding all fringe
     benefits, premium time allowances, social charges, business taxes and the
     like), paid to Customer's employees who actually perform the Covered
     Maintenance.

Subcontracted Airframe Maintenance Cost Component (Subcontracted Maintenance):
The maintenance charges to Customer for labor and materials where the
maintenance is performed for Customer by others.

<PAGE>

6-1162-RCN-1483
Page 3

Cumulative Average Actual Maintenance Cost: The aggregate Actual Maintenance
Cost for all then-completed Reporting Periods divided by the Fleet Hours for all
such completed Reporting Periods.

Reporting Period: A twelve-month period beginning on either the date the Program
Term commences or on an annual anniversary thereof.

Fleet Hours: The total airborne time (aircraft takeoff-to-touchdown) accumulated
by the Fleet during a Reporting Period.

Fleet: The number of Covered Aircraft operated by Customer during a Reporting
Period.

Cumulative Average Target Maintenance Cost: For any Reporting Period, the sum of
the products of the Target Maintenance Cost multiplied by the comparable Fleet
Hours divided by the total Fleet Hours for all completed Reporting Periods.

Target Maintenance Cost: A dollar value per flight hour, which will be the sum
of the Target Material Cost and Target Labor Cost for a Reporting Period.

3.   Methodology

3.1  General

Because maintenance costs are influenced by a number of operational, economic,
and financial factors, MDC at this time can only project the Target Maintenance
Costs. During the Program Term, MDC will calculate Target Maintenance Costs
using actual data on these factors when the data becomes available.

This Letter Agreement describes projected Target Maintenance Costs for each
Reporting Period. These Target Maintenance Costs have been calculated using
certain assumptions about Customer's operation and maintenance of the Aircraft.
Upon receipt of Customer's actual data for these assumptions and information
regarding Customer's actual operation, MDC will report Target Maintenance Costs
for each Reporting Period to Customer.

MDC will also calculate and report to Customer the Cumulative Average Target
Maintenance Cost, which is the benchmark for Program compliance. If the
Cumulative Average Actual Maintenance Cost exceeds the Cumulative Average Target
Maintenance Cost, MDC will take corrective action as defined in paragraph 4.3.

Customer will report costs in Customer's currency. All other costs related to
the Program will be expressed in U.S. dollars.

<PAGE>

6-1162-RCN-1483
Page 4

3.2  Projected Target Maintenance Costs

The Projected Target Maintenance Costs are estimates of the anticipated costs of
maintaining the Covered Aircraft for a specified period of time, taking into
account assumptions regarding projected average flight time, projected average
yearly utilization, a projected labor rate and a projected proportion of
airframe maintenance to be performed by subcontractors (Projected Target
Maintenance Costs). Projected Target Maintenance Costs are established for each
Reporting Period in year 2000 US dollars.

The Projected Target Maintenance Cost is the sum of a projected target material
cost and a projected target labor cost. These values are based on a projected
average time per flight for the Fleet of 1.7 flight hours (Projected Average
Flight Time), and a projected Labor Rate of $26 per man hour (In-House Labor)
and $50 per man hour (Contract Labor). The Projected Target Maintenance Cost is
also contigent upon the aircraft delivery schedule as defined in the Purchase
Agreement.

Accordingly, the Projected Target Maintenance Costs for each Reporting Period
are as follows:

          *

3.3  Target Maintenance Costs

For each Reporting Period, MDC will calculate Target Maintenance Costs by
adjusting (as described in Attachment A) the Projected Target Maintenance Cost
to reflect actual data for the following parameters:

     (a)  Customer's labor rate,
     (b)  Percentage of Covered Maintenance which is subcontracted,
     (c)  Average flight time,
     (d)  Number of Covered Aircraft,
     (e)  Utilization of the Covered Aircraft,
     (f)  Delivery schedule of the Covered Aircraft,
     (g)  Material price inflation,

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>

6-1162-RCN-1483
Page 5

Customer will report data to MDC for parameters (a) through (e), and MDC will
acquire data for parameter (f). For each Reporting Period, MDC will calculate
the Target Maintenance Costs and the Cumulative Average Target Maintenance Cost.

3.4  Actual Maintenance Costs

For each Reporting Period, Customer will report Actual Maintenance Costs
incurred in performing Covered Maintenance for the Covered Aircraft. Actual
Maintenance Costs will be reported for each of the four activities listed in
paragraph 2.2, in three components (Direct Material, Direct Labor, and
Subcontracted Maintenance):

     (a)  The component of airframe (excluding QEC) material cost incurred
          directly by Customer (Direct Material);
     (b)  The component of airframe (excluding QEC) labor cost incurred directly
          by Customer (Direct Labor); and
     (c)  The component airframe (excluding QEC) maintenance cost performed by
          others (Subcontracted Maintenance).

The Actual Maintenance Costs will be the sum of In-House Direct Labor and Direct
Material cost components plus subcontract maintenance costs, and will be used
along with Fleet Hours to calculate the Cumulative Average Actual Maintenance
Cost as a dollar value per flight hour.

3.5  Program Compliance

Compliance with the Program will be achieved if the Cumulative Average Actual
Maintenance Cost does not exceed the Cumulative Average Target Maintenance Cost.
If compliance is not achieved, MDC will take corrective action as defined in
paragraph 4.3.

4.   Obligations

4.1  Customer's Obligation under the Program

     4.1.1  Customer will report to MDC within 90 days after the last day of
            each Reporting Period, the following data for that Reporting Period:

            (a)   Direct Labor costs
            (b)   Direct Material costs
            (c)   Subcontracted Maintenance costs
            (d)   Customer's direct Labor Rate per man-hour
            (e)   The actual Average Flight Time per flight for the Fleet
            (f)   The number of Covered Aircraft included in the Fleet
            (g)   The Fleet Hours

<PAGE>

6-1162-RCN-1483
Page 6

For Customer's convenience, a form for reporting the above information is
included as Exhibit A to this Letter Agreement.

Failure to provide these reports to MDC within the 90 day period will constitute
an acknowledgment by Customer that the Program is in compliance. However, if the
Program should subsequently become non-compliant, Customer will, within 90 days
after the last day of the applicable Reporting Period, report to MDC the data
identified above for all then-completed Reporting Periods of the Program Term.

     4.1.2  If the Program is determined to be non-compliant, Customer will,
            upon request, submit to MDC sufficient information to allow MDC:

            (a)  To verify cost elements of the Actual Maintenance Cost as
                 defined in paragraph 3.4
            (b)  To verify the Fleet, Fleet Hours, and the Actual Average Flight
                 Time per flight
            (c)  To analyze the problems causing such non-compliance
            (d)  To develop, when required, appropriate remedial action

     4.1.3  All reports submitted to MDC will be addressed to the attention of:

            Director - Product Assurance Contracts
            Boeing Commercial Airplane Group
            P.O. Box 3707    Mail Code 2L-46
            Fax: 425-237-1706
            Seattle, Washington  98124-2207

4.2  MDC's Obligation under the Program

     4.2.1  MDC will report to Customer within 30 days after receiving
            Customer's report for each Reporting Period, the following data for
            that Reporting Period (see Exhibit B):

            (a)  Target Maintenance Cost
            (b)  Cumulative Average Target Maintenance Cost
            (c)  Actual Maintenance Cost
            (d)  Cumulative Average Actual Maintenance Cost
            (e)  Material price inflation factor

<PAGE>

6-1162-RCN-1483
Page 7

     4.2.2  At Customer's request, MDC will provide Customer sufficient
            information to verify the data described in paragraph 4.2.1 and the
            calculations used to produce that data.

     4.2.3  All reports submitted to Customer will be addressed to the attention
            of:

             Midwest Express
             555 West Air Cargo Way
             Milwaukee, Wisconsin 53207
             ATTN: Vice President of Technical Services

4.3  Corrective Action.

     If the Program is non-compliant as defined in paragraph 3.5 and Customer
     provides its reports to MDC pursuant to paragraph 4.1, then MDC will
     without charge and within 90 days of Customer's report:

     4.3.1.a. Investigate the circumstances and possible causes of the
              non-compliance, and

     4.3.1.b. Provide technical assistance to Customer in the form of analysis
              and recommendations of a kind and nature which MDC determines to
              be best suited for reducing Actual Maintenance Cost.

     4.3.2.a. If necessary, initiate a design review of the systems,
              accessories, equipment or parts determined by MDC to be the
              primary cause of the non-compliance and, when in MDC's judgment a
              redesign is indicated as a technically and economically
              practicable means of attaining Program compliance, MDC will
              redesign or cause the redesign of such items, and

     4.3.2.b. If such redesign results in retrofit kits being offered by MDC or
              MDC's suppliers, MDC will provide such kits or cause such kits to
              be provided at no charge to Customer. MDC will also reimburse, at
              MDC's then existing Warranty labor rate, Customer's reasonable
              direct labor costs for incorporation of any such kit manufactured
              to MDC's, or MDC's supplier's, detailed design. Such reimbursement
              will be provided pursuant to Exhibit C, Product Assurance
              Document, of the AGTA.

5.  Conditions and Limitations

5.1  If, with the intent of reducing Covered Maintenance Costs, MDC or any
     supplier issues reasonable service bulletins, service letters or other
     reasonable written instructions or offers no-charge retrofit kits, Customer
     will comply with such instructions or install such kits within a period of
     240 days after issuance of such instructions or receipt of

<PAGE>

6-1162-RCN-1483
Page 8

     such kits at Customer's facility, or such longer period as may be mutually
     agreed by the parties. If Customer does not comply with the time
     requirements of this paragraph, all airframe maintenance costs which MDC
     determines would have been eliminated if such instructions or kits had been
     incorporated, will be subtracted from the Actual Maintenance Costs reported
     after expiration of such time requirements.

5.2  Customer will promptly notify MDC in writing of any variations in its
     maintenance cost accounting system or procedures which would affect the
     proper reporting of Actual Maintenance Costs. MDC will have the right to
     make adjustments to the Cumulative Average Target Maintenance Cost to
     reflect the effect of any such variations.

5.3  Upon reasonable notice to Customer, MDC will have the right to audit all
     Actual Maintenance Costs reported by Customer, as well as the maintenance
     practices and procedures related thereto during the Program Term.

5.4  Upon reasonable notice to Customer, MDC may inspect Customer's maintenance
     facilities, programs and procedures. If MDC recommends in writing
     reasonable changes to Customer's maintenance programs and procedures which
     would reduce Actual Maintenance Costs and Customer does not implement such
     changes or Customer delays implementing such changes beyond the period set
     forth in paragraph 5.1, MDC will have the right to adjust the Actual
     Maintenance Costs that have been reported to deduct the increased
     maintenance costs which MDC estimates resulted from Customer's failure or
     delay in implementing such changes.

5.5  The Actual Maintenance Cost will not include the following:

     (a)  Costs arising from loss of, or damage to, any Covered Aircraft, or any
          system, accessory, equipment or part thereof.

     (b)  Any taxes, duties, tariffs, surcharges, transportation, insurance
          interest or overhead.

     (c)  The cost of initial or sustaining spare parts or the depreciation of
          such spare parts; costs resulting from any modification to the Covered
          Aircraft or any system, equipment, accessory or part thereof other
          than modifications described under paragraphs 4.3.2b and 5.1 herein.

     (d)  Costs resulting from the negligent acts or omissions of Customer.

<PAGE>

6-1162-RCN-1483
Page 9

     (e)  Costs resulting from the failure to comply with MDC's or MDC's
          suppliers' applicable written instructions for the operation, service,
          maintenance or overhaul of any Covered Aircraft, or any system,
          accessory, equipment or part thereof.

     (f)  Costs attributable to loss of use, revenue or profit.

     (g)  Costs of consumable fluids, including fuel.

     (h)  Costs due to acts of God, war, armed hostilities, riots, fires,
          floods, earthquakes or serious accidents, Governmental acts or failure
          to act affecting materials, facilities or Aircraft needed for the
          maintenance of Covered Aircraft.

     (i)  Costs due to strikes or labor troubles causing cessation, slowdown or
          interruption of work related to the maintenance of Covered Aircraft.

     (j)  Costs resulting from failure of or delay in transportation or
          inability, after due and timely diligence, to procure materials,
          systems, accessories, equipment or parts needed for the maintenance of
          Covered Aircraft.

     (k)  Amounts for any part provided by MDC or MDC's suppliers to Customer at
          no charge.

     (l)  Amounts equal to the difference between the reported price for any
          part and the reduced price for such part as provided by MDC or MDC's
          suppliers to Customer.

     (m)  Amounts related to any warranty, maintenance cost guarantee, or
          similar agreement, for which there is a credit memorandum or other
          payment scheme, established in Customer's favor, and issued by MDC or
          MDC's suppliers to Customer.

5.6  At MDC's request, Customer will assign to MDC, any of Customer's rights
     against the manufacturer of any equipment, accessory or part installed in
     the Covered Aircraft to the extent reasonably necessary for MDC to fulfill
     its obligations with respect to any corrective action provided by MDC
     hereunder.

5.7  THIS LETTER AGREEMENT AND THE RIGHTS AND REMEDIES OF CUSTOMER AND
     OBLIGATIONS OF MDC HEREIN ARE SUBJECT TO THE DISCLAIMER AND RELEASE, AND

<PAGE>

6-1162-RCN-1483
Page 10

     EXCLUSION OF CONSEQUENTIAL AND OTHER DAMAGES PROVISIONS OF EXHIBIT C,
     PRODUCT ASSURANCE DOCUMENT, OF THE AGTA.

6.  Confidential Treatment

MDC and Customer agree that this Letter Agreement is confidential and shall not
disclose it or its contents to any third party, except associated companies,
subsidiaries or affiliates of Customer or MDC and their financial and legal
advisors and potential financiers (provided such advisors and financiers are
under a prior written obligation to keep this Letter Agreement and its terms
confidential), as required by law, the Security Exchange Commission (SEC), or as
required to perform and enforce the terms hereof, without the prior written
consent of the other party, which shall not be unreasonably withheld.

Very truly yours,

MCDONNELL DOUGLAS CORPORATION

By /s/ Rick Nelson
   ---------------------------------------

Its           Attorney-In-Fact
    --------------------------------------

ACCEPTED AND AGREED TO this

Date: September 21, 2001
      --------------

MIDWEST EXPRESS AIRLINES, INC.

By /s/ Timothy E. Hoeksema
   ---------------------------------------

Its Chairman of the Board, President and
    Chief Executive Officer

<PAGE>

Attachment A to 6-1162-RCN-1483
Page 1

                           Attachment A - Adjustments

For each reporting period, MDC will calculate Target Maintenance Costs by
revising the Projected Target Maintenance Cost to reflect actual data for the
following parameters:

Material Price Inflation

Material prices will be adjusted using Producer Price Indexes as defined below.
The Target Material Cost for a Reporting Period will be calculated by
multiplying the projected target material cost by the ratio of the average index
for the Reporting Period to the index related to the projected target material
cost.

The measure of material price inflation will be the Producer Price Index for
"Aircraft Parts and Auxiliary Equipment, n.e.c." (Standard Industrial
Classification Code 3728). This index will be obtained from the publication
"Producer Prices and Price Indexes" published by the U.S. Department of Labor,
Bureau of Labor Statistics or any comparable successor publication published by
the U.S. Department of Labor, Bureau of Labor Statistics or any comparable
successor agency.

Labor Cost

The projected target labor cost will be adjusted to reflect Customer's actual
Labor Cost. The Target Labor Cost will be calculated by multiplying the
Projected Target Labor Cost by the ratio of Customer's then-current Labor Rate
to the Labor Rate used to calculate the projected target labor cost for that
Reporting Period.

Covered Aircraft

The Projected Target Maintenance Costs are based on the number of Covered
Aircraft. If the number of Covered Aircraft changes during any Reporting Period,
MDC reserves the right to incorporate such change when calculating the Target
Maintenance Costs for that Reporting Period.

Delivery Schedule

The Projected Target Maintenance Costs are based on the delivery schedule of
Covered Aircraft as described in the Purchase Agreement. If the delivery
schedule for the Covered Aircraft changes during any Reporting Period, MDC
reserves the right to incorporate such change when calculating the Target
Maintenance Costs for that Reporting Period.

<PAGE>

Attachment A to 6-1162-RCN-1483
Page 2

Average Flight Time

The formulas below are used to calculate target airframe material and labor
costs per flight hour for flight lengths other than the specified 1.6 flight
hours. The figures represent the coefficients, slope, and intercept for the best
fitting straight line through the data points obtained via the maintenance cost
study. If the Actual Average Flight Time (AAFT) for any Reporting Period differs
from the Projected Average Flight Time of 1.7 flight hours, the Target Material
Cost (TMC) and Target Labor Cost (TLC) for that reporting period will be
adjusted pursuant to the formula's below:

              TMC for AAFT =  (33.291 * AAFT) + 56.107

              TLC for AAFT =  (65.079 * AAFT) + 64.079

Utilization

The Projected Target Maintenance Costs assume a Projected Average Yearly
Utilization for the Covered Aircraft during any reporting period of 3000 flight
hours per aircraft and an average flight length of 1.6 flight hours per trip. If
the Average Yearly Utilization for the Covered Aircraft for any Reporting Period
or the average trip length change from these values, MDC reserves the right to
incorporate such change when calculating the Target Maintenance Costs for that
Reporting Period

Covered Aircraft Configuration

The Target Maintenance Cost set forth in this Program is based on the
configuration for the Covered Aircraft as set forth in Exhibit A to the Purchase
Agreement. Such Target Maintenance Cost may be adjusted by MDC to appropriately
reflect any changes to the actual configuration of the Covered Aircraft at the
time of delivery thereof to Customer. Adjustments to such Target Maintenance
Cost may also be made at any time during the Program Term to reflect any
additional changes in the configuration of the Covered Aircraft.

<PAGE>

Exhibit A to 6-1162-RCN-1483
Page 1

To:       Director - Product Assurance Contracts
          Boeing Commercial Airplane Group
          P.O. Box 3707     Mail Stop 76-02
          Fax: 206-237-1706
          Seattle, Washington  98124-2207

Subject:  Letter Agreement No. ! to Purchase Agreement No. @
          Airframe Maintenance Cost Protection Program

Reported herein are certain data required under paragraph 4.1.1 of the reference
Letter Agreement.

Reporting Period No. _____
Beginning date _________ ending date _________

Currency of the costs shown below: _________

--------------------------   --------------   --------------   ---------------
                                                  Direct        Subcontracted
         Actual               Direct Labor       Material        Maintenance
    Maintenance Costs         (total cost)     (total cost)      (total cost)
--------------------------   --------------   --------------   ---------------
Scheduled Maintenance
--------------------------   --------------   --------------   ---------------
Non-Scheduled Maintenance
--------------------------   --------------   --------------   ---------------
Repair & Overhaul
--------------------------   --------------   --------------   ---------------
Modifications
(ref. para. 4.3 & 5.1)
--------------------------   --------------   --------------   ---------------
Total
--------------------------   --------------   --------------   ---------------

The above labor costs are exclusive of time consumed by employees while waiting
for work, traveling to or from work, training, vacation, sick leave, or in any
other similar absences from the actual maintenance work. The above material
costs exclude all costs described in paragraph 5 of the reference letter
agreement.

-----------------------   --------------   -------------------   --------------
                            Average per                             Total per
  Average per manhour         flight        Average number of       aircraft
      Labor Rate            Flight Time     Covered Aircraft      Flight Hours
-----------------------   --------------   -------------------   --------------

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

<PAGE>

Exhibit A to 6-1162-RCN-1483
Page 2

The above labor rate excludes all fringe benefits, premium time allowances,
social charges, business taxes and the like.

Midwest Express

By                                        Date
   ---------------------------------           ---------------------------------

Its
    --------------------------------

<PAGE>

Exhibit B to 6-1162-RCN-1483
Page 1

To:       Midwest Express

Subject:  Letter Agreement No. ! to Purchase Agreement No. @
          Airframe Maintenance Cost Protection Program

Reported herein are certain data required under paragraph 4.2.1 of the reference
Letter Agreement.

Reporting Period No. _____
Beginning date _________ ending date _________

Costs as reported by Customer:

--------------------------   --------------   ----------   ---------------
         Actual                                 Direct      Subcontracted
    Maintenance Costs         Direct Labor     Material      Maintenance
--------------------------   --------------   ----------   ---------------
Scheduled Maintenance
--------------------------   --------------   ----------   ---------------
Non-Scheduled Maintenance
--------------------------   --------------   ----------   ---------------
Repair & Overhaul
--------------------------   --------------   ----------   ---------------
Modifications
--------------------------   --------------   ----------   ---------------

Customer's costs with adjusted Subcontracted Maintenance (per Attachment A of
the reference Letter Agreement) in U.S. dollars.

--------------------------   ------   --------   -------------   -------------
         Actual              Direct    Direct    Subcontracted   Subcontracted
    Maintenance Costs        Labor    Material       Labor         Material
--------------------------   ------   --------   -------------   -------------
Scheduled Maintenance
--------------------------   ------   --------   -------------   -------------
Non-Scheduled Maintenance
--------------------------   ------   --------   -------------   -------------
Repair & Overhaul
--------------------------   ------   --------   -------------   -------------
Modifications
--------------------------   ------   --------   -------------   -------------
Total
--------------------------   ------   --------   -------------   -------------

<PAGE>

Exhibit B to 6-1162-RCN-1483
Page 2

Actual Costs and Target Costs (per Attachment A of the reference Letter
Agreement)

------------------------  ---------  ---------  ---------  ---------  ---------
                          Reporting  Reporting  Reporting  Reporting  Reporting
                          Period 1   Period 2   Period 3   Period 4   Period 5
------------------------  ---------  ---------  ---------  ---------  ---------
Year dollars
------------------------  ---------  ---------  ---------  ---------  ---------
Actual Labor
------------------------  ---------  ---------  ---------  ---------  ---------
Actual Material
------------------------  ---------  ---------  ---------  ---------  ---------
Actual Maintenance Cost
------------------------  ---------  ---------  ---------  ---------  ---------
Fleet Hours
------------------------  ---------  ---------  ---------  ---------  ---------
Cumulative Actual
Maintenance Cost
------------------------  ---------  ---------  ---------  ---------  ---------
Number of Covered
Aircraft
------------------------  ---------  ---------  ---------  ---------  ---------
Currency Exchange factor
------------------------  ---------  ---------  ---------  ---------  ---------
Per man-hour Labor Rate
------------------------  ---------  ---------  ---------  ---------  ---------
Material Inflation
factor
------------------------  ---------  ---------  ---------  ---------  ---------
Average Flight Time
------------------------  ---------  ---------  ---------  ---------  ---------
Target Labor Cost
------------------------  ---------  ---------  ---------  ---------  ---------
Target Material Cost
------------------------  ---------  ---------  ---------  ---------  ---------
Target Maintenance Cost
------------------------  ---------  ---------  ---------  ---------  ---------
Cumulative Target
Maintenance Cost
------------------------  ---------  ---------  ---------  ---------  ---------

As of this Reporting Period, the Program is in compliance:

Yes     |_|             No     |_|

Very truly yours,

THE MDC COMPANY

Reported by    _________________________

Its            _________________________

Date           _________________________

<PAGE>

6-1162-RCN-1484

Midwest Express Airlines, Inc.
6744 South Howell Avenue
Oak Creek, Wisconsin 53154

Subject: Aircraft General Terms Agreement (AGTA) Matters

Reference:  1)  Aircraft General Terms Agreement AGTA-MWE and the
            Exhibits thereto (the AGTA) between The Boeing Company
            (Boeing) and Midwest Express Airlines, Inc. (Customer

            2)  Purchase Agreement No. 2371 (the Purchase Agreement)
            between McDonnell Douglas Corporation (Boeing) and Midwest
            Express Airlines Inc., (Customer) relating to Model
            717-2BL aircraft (Aircraft).

Customer has requested changes to certain terms in the AGTA. Those changes are
contained herein. This Letter Agreement when accepted by Customer will become
part of the Purchase Agreement and the changes herein will be applicable to all
Aircraft under the Purchase Agreement. All terms used but not defined in this
Letter Agreement have the same meaning as the AGTA.

AGTA ARTICLES

1) Article 2.1.7 of the AGTA. The phrase "and other price adjustments made
pursuant to the purchase agreement." is hereby revised to "and other upward or
downward price adjustments (if any) made pursuant to the express terms of the
purchase agreement".

2) Article 2.2.1 of the AGTA. The phrase "Except for U.S. federal or California
State income taxes imposed on Boeing or Boeing's assignee, and Washington State
business and occupation taxes imposed on Boeing or Boeing's assignee, Customer
will be responsible for and pay all Taxes." is hereby revised to "Except for
U.S. Federal or California State income taxes imposed on Boeing or Boeing's
assignee, and Washington State business and occupation taxes imposed on Boeing
or Boeing's assignee, Customer will be responsible for and pay all Taxes that
arise as a direct result of the sale or transfer to Customer of goods or
services, including aircraft, under a purchase agreement. As of July 6, 2001,
Boeing warrants that it is unaware of any taxes that will result in a tax
liability being imposed upon Boeing as a result of the sale of the aircraft,
exclusive of BFE, that will be passed onto Customer."

3) Article 2.2.2 of the AGTA. The phrase "Customer will promptly reimburse
Boeing on demand," is hereby revised to "Except for taxes for which

<PAGE>

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Page 2

Boeing is responsible pursuant to Section 2.2.1, Customer will promptly
reimburse Boeing on demand,".

4) Article 3.1 of the AGTA. The phrase "Boeing will manufacture each aircraft to
conform to the appropriate Type Certificate issued by the United States Federal
Aviation Administration (FAA)" is hereby revised to "Boeing will manufacture
each aircraft to conform to the appropriate Type Certificate issued by the
United States Federal Aviation Administration (FAA) pursuant to Part 25 of the
FAR". The phrase either a Standard Airworthiness Certificate" is hereby revised
to "either a valid and effective Standard Airworthiness Certificate". The
following sentence is hereby added to the end of the Article: "Boeing hereby
agrees to obtain, at its sole expense, FAA/JAA Joint Type Certification for the
717-200 series aircraft".

5) Article 3.2.2 of the AGTA. The phrase "(i) resulting from requirements issued
by the FAA prior to the date of the type certificate for the applicable
aircraft;" is hereby revised to "(i) resulting from requirements issued by the
FAA prior to the date of the type certificate for the applicable aircraft; or"
The phrase "(ii) resulting from requirements issued by the FAA prior to the date
of the applicable purchase agreement; and" is hereby revised to "(ii) resulting
from requirements issued by the FAA prior to the date of the applicable purchase
agreement; or".

6) Article 3.2.3 of the AGTA. The phrase "Customer will pay Boeing's charge" is
hereby revised to "Customer will pay Boeing's reasonable costs, which at
Customer's request will be substantiated in writing".

7) Article 3.3.1 of the AGTA. The phrase "the required compliance date is on or
before the scheduled delivery month of the aircraft." is hereby revised to "the
required compliance date is on or before the scheduled delivery month of the
aircraft and (iii) was not issued until after the date of the purchase
agreement".

8) Article 3.3.2 of the AGTA. The phrase "and Customer will pay Boeing's
applicable charges." is hereby revised to "Customer will pay Boeing's reasonable
costs, which at Customer's request will be substantiated in writing".

9) Article 3.4 of the AGTA. The phrase "If requested, Boeing will assist
Customer in applying for any such export license." is hereby revised to "Boeing
will provide at no charge commercially reasonable efforts requested by Customer
in applying for such export license".

10) *

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

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Page 3

*

11) Article 4.3 of the AGTA. The phrase "Boeing will promptly notify Customer"
is hereby revised to "Boeing will promptly notify Customer in writing".

12) Article 5.2 of the AGTA. The phrase "provided such inspection does not
interfere with Boeing's performance." is hereby revised to "provided such
inspection does not unreasonably interfere with Boeing's performance".

13) Article 5.5 of the AGTA. The phrase "(ii) to evaluate potential improvements
that may be offered for production or retrofit incorporation." is hereby revised
to "(ii) with the prior written approval of Customer, to evaluate potential
improvements that may be offered for production or retrofit incorporation".

14) *

15) Article 6.3 of the AGTA. The phrase " At delivery of an aircraft, Boeing
will provide Customer a bill of sale conveying good title, free of encumbrances"
is hereby revised to "At delivery of an aircraft, Boeing will provide and
warrant Customer a bill of sale conveying good title, free of all liens,
security interests and encumbrances".

16) *

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

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Page 4

17) *

18) Article 7.2 of the AGTA. The article is hereby revised in its entirety to
"7.2 Notice. Boeing will give written notice to Customer (i) of any actual
non-Customer caused delay beyond the scheduled delivery month, and (ii) of the
revised delivery month based on Boeing's good faith, reasonable appraisal of the
facts. The notice referred to in clause (i) shall be provided as soon as
possible after Boeing has knowledge of the delay or event, and the notice
referred to in clause (ii) shall be provided as soon as the revised delivery
month is determined by Boeing. Boeing further agrees that the rescheduling of
aircraft due to Excusable Delay will result in a revised delivery rate for all
of Customer's aircraft of no faster than one aircraft per month.".

19) Article 7.3 of the AGTA. The phrase "If the revised delivery month is 12
months or less after the scheduled delivery month" is hereby revised to "If the
delay in question is an Excusable Delay, and if the revised delivery month is 12
months or less after the scheduled delivery month".

20) Article 7.4 of the AGTA. The phrase "If the revised delivery month is more
than 12 months after the scheduled delivery month, either party may" is hereby
revised to "If the delay in question is an Excusable Delay, and if the revised
delivery month is more than 12 months after the scheduled delivery month,
Customer may." The phrase " If either party does not terminate" is hereby
revised to. " If the revised delivery month is more than 12 months after the
scheduled delivery month, and is due to a Excusable Delay, Boeing may terminate
the applicable purchase agreement with respect to such aircraft within 30 days
of the notice provided that operations at the plant of manufacture have been
substantially impaired and there are no commercially reasonable means to repair
them. If either party does not terminate".

21) Article 7.5 of the AGTA. The following sentence is hereby added after the
last sentence: "If the cause of the damage is other than excusable delay, then
the remedies provided in this Article 7.5 shall be in addition to the other
remedies available to Customer as provided in Letter Agreement No. MJB-002 (Non
Excusable Delay Matters).

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

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22) Article 7.6 of the AGTA. * The phrase "If Customer terminates the applicable
purchase agreement as to any aircraft, Boeing may elect, by written notice to
Customer within 30 days, to purchase from Customer any BFE related to the
aircraft at the invoice prices paid, or contracted to be paid, by the Customer"
is hereby revised to "If Customer terminates the applicable purchase agreement
as to any aircraft pursuant to this Article 7, Boeing shall, at Customer's
option (such option to be exercised in writing within 30 days after
termination), purchase from Customer any BFE specified by Customer that is
related to the affected aircraft at the invoice prices paid, or contracted to be
paid, by Customer".

23) *

24) *

25) *

26) *

27) Article 9.1.3 of the AGTA. The phrase "Boeing may assign any of its rights
and duties to any wholly-owned subsidiary of Boeing" is hereby revised to
"Boeing may assign any of its rights and duties to any wholly-owned subsidiary
of Boeing, but Boeing shall remain responsible for all assigned duties and
Customer shall continue to deal only with Boeing, notwithstanding any such
assignments".

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

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28) Article 9.3 of the AGTA. The phrase "all of Customer's rights with respect
to the aircraft under the applicable purchase agreement" is hereby revised to:
"all of Customer's rights with respect to the aircraft transferred to the buyer
or buyer-lessor under the applicable purchase agreement" The phrase "in a form
satisfactory to Boeing" is hereby revised to "in a form reasonably satisfactory
to Boeing".

29) Article 9.5 of the AGTA. The phrase ", Customer shall obtain for Boeing" is
hereby revised to ", Customer shall use commercially reasonable efforts to
obtain for Boeing".

30) Article 9.7 of the AGTA. Article 9.7 is revised in its entirety as follows:
"9.7 No Increase in Boeing Liability. With respect to the resale or lease by
Customer of an aircraft without a prior assignment agreement, no action taken by
Customer will subject Boeing to any liability beyond that in the applicable
purchase agreement or modify in any way Boeing's obligations under the
applicable purchase agreement".

31) Article 12 of the AGTA. Article 12.7 is hereby added as follows: "12.7.
Calendar Days. All day references in the AGTA or any purchase agreement or any
exhibits or appendices attached to such documents shall be deemed to refer to
calendar days, unless explicitly stated otherwise".

32) Article 12 of the AGTA. Article 12.8 is hereby added as follows: "Article
12.8. No Undisclosed Fees. All fees, payments, charges, costs and reimbursements
for which Customer is responsible shall be explicitly set forth in the AGTA or
in the applicable purchase agreements, and Customer shall not be liable for any
such fees, payments, charges, costs or reimbursements that are not explicitly
disclosed in said documents".

AGTA EXHIBIT A

33) Article 3.1.3 of Exhibit A to AGTA. Article 3.1.3 is hereby revised in its
entirety to 3.1.3. "Customer will use commercially reasonable efforts to ensure
that all BFE software is in a form reasonably compliant with Boeing Standards
for Loadable Systems as described in Boeing Document D6-55562-8."

34) Article 3.2 of Exhibit A to AGTA. The phrase "authorize Boeing to discuss
all details of the BFE directly with the BFE suppliers" is hereby revised to
"authorize Boeing to discuss all relevant details of the BFE directly with the
BFE suppliers so long as Boeing notifies Customer reasonably far in advance of
the proposed discussion".

35) Article 3.3 of Exhibit A to AGTA. The phrase "authorize Boeing to conduct or
delegate to the supplier quality source inspection and supplier hardware
acceptance of BFE at the supplier location" is hereby revised to

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"Customer will use commercially reasonable efforts required to authorize Boeing
to conduct or delegate to the supplier quality source inspection and supplier
hardware acceptance of BFE at the supplier location;".

36) Article 3.3.1 of Exhibit A to AGTA. Article 3.3.1 is hereby revised in its
entirety to "3.3.1. Customer agrees to select suppliers pre-approved by Boeing,
or if Customer desires a supplier not pre-approved, Boeing will use commercially
reasonable efforts to approve such supplier".

37) Article 3.3.2 of Exhibit A to AGTA. Article 3.3.2 is hereby deleted in its
entirety.

38) Article 3.4 of Exhibit A to AGTA. The phrase "license for Boeing to copy BFE
Aircraft Software" is hereby revised to "license for Boeing to copy BFE Aircraft
Software only for the purpose of use in Customer's aircraft".

39) Article 3.5 of Exhibit A to AGTA. The phrase "to copy" is hereby revised to
"to copy only for the purpose of use in Customer's aircraft".

40) Article 4 of Exhibit A to AGTA. The phrase ", Boeing will provide" is hereby
revised to ", Boeing will, at its sole expense, provide".

41) *

42) *.

43) Article 7.1 of Exhibit A to AGTA. The phrase "Boeing will have only such
liability for BFE as a bailee for mutual benefit would have, but will not be
liable for loss of use." Is hereby revised to "Boeing will not be liable for BFE
unless loss of use is due to Boeing's negligence.".

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

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44) Article 8 of Exhibit A to AGTA. Article 8 is hereby revised by adding the
following to the end of the article: "Boeing will be responsible, at no charge
to Customer, to replace such interchanged BFE, and will not interchange BFE if
it causes a delay in delivery of Customer's aircraft."

45) Article 9 of Exhibit A to AGTA. The phrase "(including attorney's fees)" is
hereby revised to "(including reasonable attorney's fees)". The phrase ",
arising out of" is hereby revised to "to the extent arising out of". The phrase
"solely by Boeing's installation of the BFE" is hereby revised to solely by
Boeing's handling, storage or installation of the BFE".

46) Article 10 of Exhibit A to AGTA. The phrase "damages and costs arising out
of any actual or alleged infringement of any patent or intellectual property
rights by BFE or arising out of the installation, sale or use of BFE by Boeing"
is hereby revised to "damages and costs to the extent arising out of any actual
or alleged infringement of any patent or intellectual property rights by BFE or
by its installation, sale or use by Boeing."

AGTA EXHIBIT B

47) Part 1 of Exhibit B to AGTA. The following sentence is hereby added between
"Customer Support Document" and "Part 1" as follows: "All training, services,
support, information, documents, materials and other items provided by Boeing
pursuant to this Customer Support Document shall, except to the extent
explicitly provided otherwise herein, be furnished as part of the Aircraft
Price, at no added charge to Customer".

48) Article 1, Part 1 of Exhibit B to AGTA. Article 1.5 is hereby added as
follows: "1.5 Where possible, all conferences and training sessions should be
conducted in Milwaukee."

49) Article 2, Part 1 of Exhibit B to AGTA. The phrase "approximately 12 months
before" is hereby revised to "approximately 18 months before". The following is
hereby added to the end of the article: "Where possible, all conferences and
training sessions should be conducted in Milwaukee".

50) Article 2, Part 2 of Exhibit B to AGTA The phrase ", will include:" is
hereby revised to ", will include, without limitation:".

51) Article 3.1, Part 1 of Exhibit B to AGTA. The phrase "Such support will
include:" is hereby revised to "Such support will include without limitation:".

52) Article 4.2, Part 1 of Exhibit B to AGTA. The phrase "Customer will pay
Boeing's then current per diem" is hereby revised to "Customer will pay Boeing's
lowest per Diem".

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53) Article 4.3, Part 1 of Exhibit B to AGTA. The following sentence is hereby
added to the end of the article: "Boeing shall travel on Customer's airline,
where possible, in connection with services to be provided for Customer".

54) Article 4.4, Part 1 of Exhibit B to AGTA. The phrase "providing revenue
service training" is hereby revised to "providing revenue service training,
excluding any income taxes".

55) Article 5.5, Part 1 of Exhibit B to AGTA. The phrase "The invoice will be
submitted to Customer" is hereby revised to "The invoice will be calculated on a
straight pass-through basis, without mark-up, and will be submitted to
Customer".

56) Article 5.6, Part 1 of Exhibit B to AGTA. Article 5.6 is hereby deleted in
its entirety.

57) Article 2, Part 2 of Exhibit B to AGTA. The following sentence is hereby
added after the first sentence: "Boeing shall provide Customer no less favorable
consideration with respect to AOG support than any other airline".

58) Article 2.7.1, Part 2 of Exhibit B to AGTA. The phrase "Boeing may rely on"
is hereby revised to: "Boeing may reasonably rely on".

59) Article 2.7.4, Part 2 of Exhibit B to AGTA. Article 2.7.4 is hereby revised
in its entirety as follows: "2.7.4 Customer will pay Boeing at its lowest rates
then in effect for requested work not covered by the Boeing Warranty, if any".

60) Article 1, Part 3 of Exhibit B to AGTA. The phrase "if applicable, be
prepared generally in accordance with" is hereby revised to "if applicable, be
prepared in accordance with". The following sentence is hereby added to the end
of the Article as follows: "Customer may copy any Boeing Materials solely for
the purpose of Customer's internal use.".

61) Article 3, Part 3 of Exhibit B to AGTA. The phrase "at no additional charge"
is hereby revised to "at no charge".

62) Article 6.1, Part 3 of Exhibit B to AGTA. Article 6.1 is hereby revised in
its entirety to: "6.1 Revision Service. Boeing will provide revision service as
identified in the purchase agreement."

63) Article 7.1, Part 3 of Exhibit B to AGTA. The phrase "Boeing will request
that each supplier of the components and equipment make software documentation
available to Customer" is hereby revised to "Boeing will require that each
supplier of the components and equipment make software documentation available
to Customer at no charge".

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64) Article 3, Part 4 of Exhibit B to AGTA. The phrase "which, in the opinion of
Boeing, is detrimental," is hereby revised to "which the parties reasonably
agree is detrimental".

65) Article 1, Part 5 of Exhibit B to AGTA The following sentence is hereby
added to the end of the Article as follows: "For purposes of this Part 5
temporary third party contract labor used by Customer to supplement Customer's
workforce and under the direct supervision of Customer shall be considered
Customer employees."

66) Article 2, Part 5 of Exhibit B to AGTA. The phrase "Customer is authorized
to make copies of Materials (except for Materials bearing the copyright legend
of a third party)" is hereby revised to "Customer is authorized to make copies
of Materials (except for Materials bearing the copyright legend of a third
party, for which Boeing has not received authorization for its customers to
copy)".

67) Article 4, Part 5 of Exhibit B to AGTA. The phrase "and be liable to Boeing
for any breach of those agreements by a contractor" is hereby revised to "and to
notify Boeing promptly after becoming aware of contractor's breach. Any
information or materials which were provided by Boeing and passed on to a third
party contractor by Customer should be treated as Proprietary Materials."

68) Article 5, Part 5 of Exhibit B to AGTA. The phrase "by a regulatory agency"
is hereby revised to "by a regulatory agency or to the court". The phrase "or
modification of such aircraft" is hereby revised to "or modification of such
aircraft, or to the court". The phrase "agrees to notify Boeing immediately" is
hereby revised to "agrees to notify Boeing promptly after".

AGTA EXHIBIT C

69) Article 2 Part 2 of Exhibit C to AGTA. The second sentence is hereby revised
to "The technical advisory assistance, provided from the Seattle area or at a
base designated by Customer as appropriate is listed below. Boeing will target a
response time of 3 business days after Customers request to initiate the work
contemplated for the support services discussed herein. Customer recognizes that
the actual time to complete the task depends on the nature and complexity of the
specific request. If Boeings average response time is not 3 business days, as
measured quarterly, Boeing will meet with Customer to discuss ways to improve
such response time. In order to monitor this response time, Customer will submit
all requests through the on-site Boeing Field Service Representative so that the
requirement is entered into the BOECOM message tracking system."

70) Article 2.2, Part 2 of Exhibit C to AGTA. In Article 2.2 (i), the phrase
"conditions resulting" is hereby revised to "conditions to the extent
resulting". In Article 2.2 (ii) the phrase "conditions resulting" from acts or
omissions" is hereby revised to "conditions to the extent resulting from misuse
and abuse". In Article

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2.2 (iii) the phrase "conditions resulting" is hereby revised to "conditions to
the extent resulting".

71) Article 3.2, Part 2 of Exhibit C to AGTA. The first sentence is hereby
deleted. The phrase "from a defect" in the second sentence is hereby deleted.

72) Article 4.2, Part 2 of Exhibit C to AGTA. The phrase "The standard labor
rate paid by Boeing to its customers is established and published annually" is
hereby revised to "The standard labor rate paid by Boeing to its customers is
established and published annually and as of the date of this Agreement is
$47.50 per hour in July 2001 subject to escalation (STE) dollars."

73) Article 4.3, Part 2 of Exhibit C to AGTA. The phrase "a condition Boeing has
identified as a covered defect" is hereby revised to "a condition Boeing has
identified as a defect".

74) Article 4.4, Part 2 of Exhibit C to AGTA. The phrase "Boeing will make all
reimbursements by credit memoranda which may be applied toward the purchase of
Boeing goods and services" is hereby revised to "Boeing will make all
reimbursements by credit memoranda which may be applied toward the purchase of
Boeing goods and services, provided, however, that if at the time reimbursement
is made Customer does not owe Boeing for any goods or services, Customer may
request Boeing to make the reimbursement in cash".

75) Article 4.5, Part 2 of Exhibit C to AGTA. The phrase "will not exceed 65% of
Boeing's then-current sales price for a new replacement Boeing Product" is
hereby revised to "will not exceed 65% of Boeing's then-current sales price for
a new replacement Boeing Product, except in the case where the part was critical
to the operation of an aircraft and the repair could be performed more quickly
than obtaining a replacement part from Boeing".

76) Article 7.3.1, Part 2 of Exhibit C to AGTA. The phrase "Direct Labor
(excluding time expended for overhaul) at Customer's Warranty Labor Rate" is
hereby revised to: "Direct Labor at Customer's Warranty Labor Rate".

77) Article 7.3.2, Part 2 of Exhibit C to AGTA. Article 7.3.2 is hereby deleted
in its entirety.

78) Article 7.4.1, Part 2 of Exhibit C to AGTA. The phrase "a defective product
found to be beyond economical repair" is hereby revised to "a defective
product".

79) Article 8.1, Part 2 of Exhibit C to AGTA. The phrase "Customer or its
authorized agent will pay shipping charges" is hereby revised to "Customer or
its authorized agent will pay freight plus any insurance purchased specifically
for a shipment". The following sentence is hereby added before the last sentence
as

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follows: "Boeing recognizes that expedited charges are reasonable in a "aircraft
on ground" (AOG) or potential AOG situation."

80) Article 8.3, Part 2 of Exhibit C to AGTA. Article 8.3.3 is hereby added as
follows "8.3.3 If requested by Customer, and required by the nature of the
defect, and after determination that other options are not feasible, Boeing will
provide an AOG team at no charge to customer to perform a Correction."

81) Article 9.3, Part 2 of Exhibit C to AGTA. Article 9.3 is hereby revised in
its entirety as follows: "9.3 Separate Agreement. Prior to performing the
correction, Boeing and Customer will agree to the scope of the work to be
performed and the timing".

82) *

83) *

84) Article 4.2, Part 3 of Exhibit C to AGTA. In Article 4.2 (iii) the phrase
"an act or omission of Customer" is hereby revised to "misuse or abuse by
Customer". In Article 4.2 (iv) the phrase "Boeing's instructions" is hereby
revised to "Boeing's written instructions previously provided or made available
to Customer".

85) Article 2, Part 4 of Exhibit C to AGTA. The phrase "Boeing will conduct an
investigation of the problem and assist Customer in the resolution of those
claims" is hereby revised to " Boeing will use commercially reasonable efforts
in a timely basis on Customer's behalf in the resolution of those claims".

86) *

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

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87) Article 2, Part 5 of Exhibit C to AGTA. The phrase "attributable to the
design or installation of any Boeing Product," is hereby revised to
"attributable to the design of any Boeing Product or installation of any Boeing
or Supplier Product,"

88) Article 3, Part 5 of Exhibit C to AGTA. The phrase "design or installation
of a Supplier Product" is hereby revised to "design of a Supplier Product".

89) Article 4, Part 5 of Exhibit C to AGTA. Article 4 hereby revises the
paragraph by adding at the end of the section as follows: "The foregoing actions
shall be at no cost to Customer".

90) *

91) *

92) *

93) *

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>

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Page 14

94) *

95) *

APPENDICES

96) Appendix I, Sample Insurance Certificate. The first sentence immediately
below the Header entitled: DEDUCTABLES / SELF-INSURANCE, is deleted and replaced
with "Any deductible and/or self-insurance amount (other than standard
deductibles) are to be disclosed to Boeing."

97) Appendix I, Sample Insurance Certificate. The first sentence in part C (3)
is deleted and replaced with "For the purposes of the Certificate, "Boeing" is
defined as The Boeing Company, its divisions, subsidiaries, affiliates, the
assignees of each and their respective directors, officers, employees and agents
(example of an agent is someone Boeing may ask to do repair or maintenance on an
aircraft).

98) Appendix II, Sample Purchase Agreement Assignment, is hereby deleted in its
entirety and replaced with the attachment hereto.

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>

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MDC and Customer agree that this Letter Agreement is confidential and shall not
disclose it or its contents to any third party, except associated companies,
subsidiaries or affiliates of Customer or MDC and their financial and legal
advisors and potential financiers (provided such advisors and financiers are
under a prior written obligation to keep this Letter Agreement and its terms
confidential), as required by law, the Security Exchange Commission (SEC), or as
required to perform and enforce the terms hereof, without the prior written
consent of the other party, which shall not be unreasonably withheld.

Very truly yours,

MCDONNELL DOUGLAS CORPORATION

By  /s/ Rick Nelson
   ---------------------------------------

Its           Attorney-In-Fact
    --------------------------------------

ACCEPTED AND AGREED TO this

Date:  September 21, 2001
      --------------

MIDWEST EXPRESS AIRLINES, INC.

By  /s/ Timothy E. Hoeksema
   ---------------------------------------

Its Chairman of the Board, President and
    Chief Executive OfficerPURCHASE AGREEMENT NUMBER 2371

                                     between

                          MCDONNELL DOUGLAS CORPORATION

                                       and

                         Midwest Express Airlines, Inc.

                       Relating to Model 717-2BL Aircraft

<PAGE>
                                TABLE OF CONTENTS

                                                                            SA
ARTICLES                                                                  NUMBER

    1.         Quantity, Model and Description

    2.         Delivery Schedule

    3.         Price

    4.         Payment

    5.         Miscellaneous

TABLE

    1.         Aircraft Information Table

EXHIBIT

    A.         Aircraft Configuration

    B.         Aircraft Delivery Requirements and Responsibilities

SUPPLEMENTAL EXHIBITS

    AE1.       Escalation Adjustment/Airframe and Optional Features

    BFE1.      BFE Variables

    CS1.       Customer Support Variables

    EE1.       Engine Escalation/Engine Warranty and Patent Indemnity

    SLP1.      Service Life Policy Components

                                       i
<PAGE>
LETTER AGREEMENTS

6-1162-RCN-1476 ......Performance Guarantees

6-1162-RCN-1481 ......Business Considerations

6-1162-RCN-1482 ......Aircraft Schedule Reliability

6-1162-RCN-1483 ......Maintenance Cost

6-1162-MJB-002 .......Non Excusable Delay Matters

6-1162-RCN-1484 ......AGTA Matters

6-1162-RCN-1497 ......Other Matters

6-1162-RCN-1498 ......Boeing Guarantee

6-1162-RCN-1503 ......Performance Validation

6-1162-RCN-1504 ......Rolls Financing Matters

                                       ii
<PAGE>

                           Purchase Agreement No. 2371

                                     between

                          McDonnell Douglas Corporation

                                       and

                         Midwest Express Airlines, Inc.

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

       This Purchase Agreement No. 2371 dated as of between McDonnell Douglas
Corporation, a wholly-owned subsidiary of The Boeing Company (MDC) and Midwest
Express Airlines, Inc. (Customer) relating to the purchase and sale of Model
717-2BL aircraft incorporates the terms and conditions (except as specifically
set forth below) of the Aircraft General Terms Agreement dated as of between The
Boeing Company and Midwest Express Airlines, Inc., identified as AGTA-MWE
(AGTA).

Article 1.        Quantity, Model and Description.

       The aircraft to be delivered to Customer will be designated as Model
717-2BL aircraft (the Aircraft). MDC will manufacture and sell to Customer
Aircraft conforming to the configuration described in Exhibit A, which is part
of this Purchase Agreement, in the quantities listed in Table 1 to the Purchase
Agreement.

Article 2.        Delivery Schedule.

       The scheduled months of delivery of the Aircraft are listed in the
attached Table 1, which is part of this Purchase Agreement. Exhibit B, which is
part of this Purchase Agreement, describes certain responsibilities for both
Customer and MDC in order to accomplish the delivery of the Aircraft.

Article 3.        Price.

       3.1 Aircraft Basic Price. The Aircraft Basic Price is listed in Table 1
in subject to escalation dollars.

       3.2 Advance Payment Base Prices. The Advance Payment Base Prices listed
in Table 1 were calculated utilizing the latest escalation factors available to
MDC on the date of this Purchase Agreement projected to the month of scheduled
delivery.

                                       1
<PAGE>

Article 4.        Payment.

       4.1 MDC acknowledges receipt of a deposit in the amount shown in Table 1
for each Aircraft (Deposit).

       4.2 The standard advance payment schedule for the Model 717-2BL aircraft
requires Customer to make certain advance payments, expressed in a percentage of
the Advance Payment Base Price of each Aircraft beginning with a payment of 1%,
less the Deposit, on the effective date of the Purchase Agreement for the
Aircraft. Additional advance payments for each Aircraft are due on the first day
(other than a Saturday, Sunday or federal holiday) of the months listed in the
attached Table 1.

       4.3 For any Aircraft whose scheduled month of delivery is less than 24
months from the date of this Purchase Agreement, the total amount of advance
payments due for payment upon signing of this Purchase Agreement will include
all advance payments which are past due in accordance with the standard advance
payment schedule set forth in paragraph 4.2 above.

       4.4 Customer will pay the balance of the Aircraft Price of each Aircraft
at delivery.

Article 5.        Miscellaneous.

       5.1 Aircraft Information Table. Table 1 consolidates information
contained in Articles 1, 2, 3 and 4 with respect to (i) quantity of Aircraft,
(ii) applicable Detail Specification, (iii) month and year of scheduled
deliveries, (iv) Aircraft Basic Price, (v) applicable escalation factors and
(vi) Advance Payment Base Prices and advance payments and their schedules.

       5.2 Escalation Adjustment/Airframe and Optional Features. Supplemental
Exhibit AE1 contains the applicable airframe and optional features escalation
formula.

       5.3 Buyer Furnished Equipment Variables. Supplemental Exhibit BFE1
contains vendor selection dates, on dock dates and other variables applicable to
the Aircraft.

       5.4 Customer Support Variables. Supplemental Exhibit CS1 contains the
variable information applicable to information, training services and other
things furnished by MDC in support of the Aircraft.

       5.5 Engine Escalation Variables. Supplemental Exhibit EE1 describes the
applicable engine escalation formula and contains the engine warranty and the
engine patent indemnity for the Aircraft.

                                       2
<PAGE>

       5.6 Service Life Policy Component Variables. Supplemental Exhibit SLP1
lists the airframe and landing gear components covered by the Service Life
Policy for the Aircraft.

       5.7 Public Announcement. Boeing reserves the right to make a public
announcement regarding Customer's purchase of the Aircraft upon approval of
Boeing's press release by Customer's public relations department or other
authorized representative with such editiorial changes as Customer may
reasonably request.

       5.8 Negotiated Agreement; Entire Agreement. This Purchase Agreement,
including the provisions of Article 8.2 of the AGTA relating to insurance, and
Article 11 of Part 2 of Exhibit C of the AGTA relating to DISCLAIMER AND RELEASE
and EXCLUSION OF CONSEQUENTIAL AND OTHER DAMAGES, has been the subject of
discussion and negotiation and is understood by the parties; the Aircraft Price
and other agreements of the parties stated in this Purchase Agreement were
arrived at in consideration of such provisions. This Purchase Agreement,
including the AGTA, together with the Table 1, Exhibits, Supplemental Exhibits,
and Letter Agreements herein and as referenced in the Table of Contents;
contains the entire agreement between the parties and supersedes all previous
proposals, understandings, commitments or representations whatsoever, oral or
written, and may be changed only in writing signed by authorized representatives
of the parties.

DATED AS OF     September 28     , 2001
            ---------------------

MIDWEST EXPRESS AIRLINES, INC.                MCDONNELL DOUGLAS CORPORATION
                                              a wholly-owned subsidiary of
                                              THE BOEING COMPANY

By  /s/ Timothy E. Hoeksema                   By /s/ Rick Nelson
   ------------------------------------         ----------------------------

Its Chairman of the Board, President           Its Attorney-In-Fact
    and Chief Executive Officer

                                       3
<PAGE>

                                                Table 1 to
                                       Purchase Agreement No. 2371
                      Aircraft Delivery, Description, Price and Advance Payments

Airframe Model/MTGW:               717-200          114,000
Engine Model:                   BR700-715A1-30
Airframe Price:                                                   $32,017,000
Optional Features:                                                   $789,800
                                                                 ------------
Sub-Total of Airframe and Features:                               $32,806,800
Engine Price (Per Aircraft):                                               $0
Aircraft Basic Price (Excluding BFE/BDE):                         $32,806,800
                                                                 ============
Buyer Furnished Equipment (BFE) Estimate:                            $600,000
Buyer Designated Equipment (BDE) Estimate:                                 $0

Refundable Deposit per Aircraft at Proposal Acceptance:               $75,000

Detail Specification:        CS7172F (2/1/2000)
Price Base Year:             Jul-00              00A

 Airframe and  Engine Escalation Data:

Base Year Index (ECI):                    145.40
Base Year Index (ICI):                    130.30

<TABLE>
<CAPTION>
                                                                Advance Payment Per Aircraft (Amts. Due/Mos. Prior to Delivery):
                            Escalation    Escalation Estimate  ------------------------------------------------------------------
  Delivery    Number of       Factor       Adv Payment Base    At Signing      24 Mos.     21/18/12/9/6 Mos.           Total
    Date      Aircraft      (Airframe)      Price Per A/P          1%            4%               5%                    30%
    ----      --------      ----------      -------------          --            --               --                    ---

<S>               <C>         <C>            <C>                <C>          <C>              <C>                   <C>
  Feb-2003        1           1.1011         $36,124,000        $286,240     $1,444,960       $1,806,200            $10,837,200
  Apr-2003        1           1.1069         $36,314,000        $288,140     $1,452,560       $1,815,700            $10,894,200
  Jun-2003        1           1.1125         $36,498,000        $289,980     $1,459,920       $1,824,900            $10,949,400
  Aug-2003        1           1.1187         $36,701,000        $292,010     $1,468,040       $1,835,050            $11,010,300
  Oct-2003        1           1.1259         $36,937,000        $294,370     $1,477,480       $1,846,850            $11,081,100
  Dec-2003        1           1.1321         $37,141,000        $296,410     $1,485,640       $1,857,050            $11,142,300
  Feb-2004        1           1.1373         $37,311,000        $298,110     $1,492,440       $1,865,550            $11,193,300
  Apr-2004        1           1.143          $37,498,000        $299,980     $1,499,920       $1,874,900            $11,249,400
  Jun-2004        1           1.1489         $37,692,000        $301,920     $1,507,680       $1,884,600            $11,307,600
  Aug-2004        1           1.155          $37,892,000        $303,920     $1,515,680       $1,894,600            $11,367,600
  Oct-2004        1           1.1623         $38,131,000        $306,310     $1,525,240       $1,906,550            $11,439,300
  Dec-2004        1           1.168          $38,318,000        $308,180     $1,532,720       $1,915,900            $11,495,400
  Feb-2005        1           1.1728         $38,476,000        $309,760     $1,539,040       $1,923,800            $11,542,800
  Apr-2005        1           1.1784         $38,660,000        $311,600     $1,546,400       $1,933,000            $11,598,000
  Jun-2005        1           1.1848         $38,869,000        $313,690     $1,554,760       $1,943,450            $11,660,700
  Aug-2005        1           1.1925         $39,122,000        $316,220     $1,564,880       $1,956,100            $11,736,600
  Oct-2005        1           1.2015         $39,417,000        $319,170     $1,576,680       $1,970,850            $11,825,100
  Dec-2005        1           1.2089         $39,660,000        $321,600     $1,586,400       $1,983,000            $11,898,000
  Feb-2006        1           1.2153         $39,870,000        $323,700     $1,594,800       $1,993,500            $11,961,000
  Apr-2006        1           1.2225         $40,106,000        $326,060     $1,604,240       $2,005,300            $12,031,800
</TABLE>

<PAGE>

                             AIRCRAFT CONFIGURATION

                                     between

                          MCDONNELL DOUGLAS CORPORATION

                                       and

                         Midwest Express Airlines, Inc.

                   Exhibit A to Purchase Agreement Number 2371

<PAGE>
Exhibit A to
Purchase Agreement No. 2371
Page 2
                             AIRCRAFT CONFIGURATION

                             Dated ________________

                                   relating to

                             MODEL 717-2BL AIRCRAFT

       The Detail Specification is MDC Detail Specification CS7172G dated
December 15, 2000 as amended to incorporate the Specification Change Notices
(SCNs) attached hereto, including the effects on Manufacturer's Empty Weight
(MEW). The Detail Specification may be further amended in accordance with the
provisions of Article 4 of the AGTA. The Aircraft Basic Price reflects and
includes all effects of such SCNs., except such Aircraft Basic Price does not
include the price effects of any Buyer Furnished Equipment or Buyer Designated
Equipment.

                                       A
<PAGE>
<TABLE>
                                           Midwest Express 717-200
                                                    SCN's
<CAPTION>
Option                                               Title                                                     Price
Number                                                                                                      in 7/00$, STE
--------------------------------------------------------------------------------------------------------------------------
<S>                <C>                                                                                        <C>
G0100C028A-1       Selectable Program Options
                                                                                                                 NC
                        Note: A version of G0100C028A will be prepared once buyer selects specific
                        program options.

G0201C007-1        Incorporation of Finish Specification F-109-TBD for Midwest Express 717-200
                                                                                                                 NC
                       Note: A version of G0201C007 will be prepared once buyer selects specific
                       interior finish color, upholstery and exterior scheme.

G0219C006A         Certification for Dispatch with One Brake Hydraulic System Inoperative                      42,700
                   Within Any One Wheel

G0320D024          Increased Maximum Taxi Weight (MTW) from 111,000 lbs to 115,000 lbs                         196,900
                   and Maximum Takeoff Gross Weight (MTOGW) from 110,000 Lbs to
                   114,000 Lbs

G2122C001C         Installation of Gasper Booster Fan System                                                   28,400

G2312C007          Installation of a Third ARINC 716/750 VHF Communications System Utilizing                   42,200
                   Existing Partial Provisions

G2322S003          Installation of a Generic Non-functional SELCAL Plug                                          NC

G2324C004D         Installation of a Seller-Furnished ARINC 744A Full Format Printer                           31,600

G2324C008A         Installation of a Communications Management Unit (CMU) Mark 2 Utilizing                     61,100
                    Existing Partial Provisions

G2332C005          Installation of a Matsushita Prerecorded Announcement System With                           31,700
                   Boarding Music

G2500C027B-1       Installation of a 88-Passenger All-Business Class Interior Arrangement for                  28,200
                   Midwest Express

                       Note: A version of SCN G2500C027B will be created to install a custom
                                88-passenger All Business Class Interior J152511 for Midwest Express.

G2500C029          Custom Airline Soft Good Finish Materials                                                   61,800
                                                                                                             ** see note

                        Note: Price to be adjusted based on choice of soft good finish materials.                BQ
                                 ** Price includes an estimate provided by MWX for premium leather
                                    seat covers (minus the cost of seat covering material for Boeing
                                    baseline 106-passengers arrangement)

G2515C008          Replacement of IPECO Captain and First Officer Seats with IPECO Seat                         1,200
                   Faced in Lambswool

G2515C009A         Installation of Rotary Buckle on the Crotch Strap in Lieu of the Lap Belt
                   on Captain and First Officer Seats                                                            NC
</TABLE>

<PAGE>
<TABLE>
                                           Midwest Express 717-200
                                                    SCN's
<CAPTION>
Option                                               Title                                                     Price
Number                                                                                                      in 7/00$, STE
--------------------------------------------------------------------------------------------------------------------------
<S>                <C>                                                                                        <C>
G2523C004A-1       Certification of a New 16G Dynamic Seat Program (Non Standard Supplier/                      8,200
                    Vendor TBD)                                                                              ** see note

                        Note: A version of G2523C004A will be prepared to reflect Midwest Express                BQ
                        selection of TBD Vendor business class seat program.
                        **Price to be adjusted based upon definition of scope of work for certification.
G2531C014A         Definition of Interior Option FL4: BFE Galley G3A in Lieu of Forward Lavatory               (9,200)

G2531C015A-1       Certification of a New Galley Program (Non-Standard Supplier/Vendor TBD)                     5,400

                        Note: A version of G2531C015A will be prepared to reflect Midwest Express                BQ
                        selection of new TBD vendor galley program.
                        **Price to be adjusted based upon definition of scope of work for certification.

G3131C009A         Installation of an Allied Signal FDAMS/DFDAU Unit (Aircraft Condition                       79,900
                   Monitoring System)

G3242S001          Installation of Nose Landing Gear Radial Tires in Lieu of those Specified                     NC

G3246C002A         Installation of an Automatic Braking System with Landing and Takeoff Modes                  139,400

G3344C002B         Installation of Wing Tip Mounted Logo Lights Utilizing Existing                             18,200
                   Partial Provisions

G3446C003          Installation of 2 ATC Mode-S Transponders and TCAS Computer to Comply                       14,500
                   With TCAS Change 7 Requirements

G3511C002A         Install a 77-Cubic Foot Composite Crew Oxygen Cylinder with an Integrated                     NC
                   Regulator Shutoff Valve and Pressure Indicator

G3520C002A         Installation of 4-Person Oxygen Insert Assemblies Above Each Triple                          7,600
                   Passenger Seat Assembly and 3-Person Oxygen Insert Assemblies Above
                   Each Double Passenger Seat Assembly

G9900D018          Selection of a Puritan Bennett Buyer-Furnished Flight Crew Oxygen System                      N/C

------------------------------------------------------------------------------------------------------------------------
Total                                                                                                          789,800
========================================================================================================================

</TABLE>
<PAGE>
               AIRCRAFT DELIVERY REQUIREMENTS AND RESPONSIBILITIES

                                     between

                          MCDONNELL DOUGLAS CORPORATION
                                       and

                         Midwest Express Airlines, Inc.

                   Exhibit B to Purchase Agreement Number 2371

                                       B
<PAGE>
Exhibit B to
Purchase Agreement No. 2371
Page 1

               AIRCRAFT DELIVERY REQUIREMENTS AND RESPONSIBILITIES

                                   relating to

                             MODEL 717-2BL AIRCRAFT

Both MDC and Customer have certain documentation and approval responsibilities
at various times during the construction cycle of Customer's Aircraft that are
critical to making the delivery of each Aircraft a positive experience for both
parties. This Exhibit B documents those responsibilities and indicates
recommended completion deadlines for the actions to be accomplished.

                                      B-1
<PAGE>
Exhibit B to
Purchase Agreement No. 2371
Page 2

1.     GOVERNMENT DOCUMENTATION REQUIREMENTS.

Certain actions are required to be taken by Customer in advance of the scheduled
delivery month of each Aircraft with respect to obtaining certain government
issued documentation.

       1.1    Airworthiness and Registration Documents.

              Not later than 10 months prior to delivery of each Aircraft,
       Customer will notify MDC of the registration number to be painted on the
       side of the Aircraft. In addition, and not later than 3 months prior to
       delivery of each Aircraft, Customer will, by letter to the regulatory
       authority having jurisdiction, authorize the temporary use of such
       registration numbers by MDC during the pre-delivery testing of the
       Aircraft.

Customer is responsible for furnishing any Temporary or Permanent Registration
Certificates required by any governmental authority having jurisdiction to be
displayed aboard the Aircraft after delivery.

       1.2    Certificate of Sanitary Construction.

              1.2.1 U.S. Registered Aircraft. MDC will at its sole cost obtain
       from the United States Public Health Service, a United States Certificate
       of Sanitary Construction to be displayed aboard each Aircraft after
       delivery to Customer.

              1.2.2 Non-U.S. Registered Aircraft. If Customer requires a United
       States Certificate of Sanitary Construction at the time of delivery of
       the Aircraft, Customer will give written notice thereof to MDC at least 3
       months prior to delivery. MDC will at its sole cost then use commercially
       reasonable efforts to obtain the Certificate from the United States
       Public Health Service and present it to Customer at the time of Aircraft
       delivery.

       1.3    Confirmation of No Prior Registration.

              MDC will instruct the FAA to confirm to Customer's applicable
       regulatory agency that the Aircraft has not been previously registered in
       the United States subject to Customer's written request to provide such
       confirmation no later that 45 days prior to delivery.

       1.4    Customs Documentation.

              1.4.1 Import Documentation. If the Aircraft is intended to be
       exported from the United States, Customer must notify MDC not later than
       3 months prior to delivery of each Aircraft of any documentation required
       by the customs authorities or by any other agency of the country of
       import.

                                      B-2
<PAGE>
Exhibit B to
Purchase Agreement No. 2371
Page 3

              1.4.2 General Declaration - U.S. If the Aircraft is intended to be
       exported from the United States, MDC will prepare Customs Form 7507,
       General Declaration, for execution by U.S. Customs immediately prior to
       the ferry flight of the Aircraft. For this purpose, Customer will furnish
       to MDC not later than 7 days prior to delivery a complete crew and
       passenger list and a complete ferry flight itinerary, including point of
       exit from the United States for the Aircraft.

If Customer intends, during the ferry flight of an Aircraft, to land at a U.S.
airport after clearing Customs at delivery, Customer must notify MDC not later
than 7 days prior to delivery of such intention. If MDC receives such
notification, MDC will provide to Customer the documents constituting a Customs
permit to proceed, allowing such Aircraft to depart after any such landing.
Sufficient copies of completed Form 7507, along with passenger manifest, will be
furnished to Customer to cover U.S. stops scheduled for the ferry flight.

2.     Insurance CertificateS.

       Unless provided earlier, Customer will provide to MDC not later than 10
days prior to delivery of the first Aircraft, a copy of the requisite annual
insurance certificate in accordance with the requirements of Article 8 of the
AGTA.

3      NOTICE OF FLYAWAY CONFIGURATION.

       3.1    Ownership Placards.

       If requested by Customer, MDC at no additional cost to Customer will
fabricate and install ownership placards on the airframe and/or engines subject
to Customer providing the following information to MDC no later than 30 days
prior to delivery:

              (i) the legend to appear on the ownership placards, and

              (ii) the placard installation location such as on the airframe
       only, the engines only, or on both the airframe and engines.

       3.2    Delivery Requirements.

       Not later than 7 days prior to delivery of the Aircraft, Customer will
provide to MDC a configuration letter stating the requested "flyaway
configuration" of the Aircraft for its ferry flight. This configuration letter
should include:

              (i) the quantity of fuel to be loaded on the Aircraft prior to the
       ferry flight and any scheduled post-delivery flight training;

              (ii) the cargo to be loaded on the Aircraft including quantity,
       description, weight, part number and value of each item,

                                      B-3
<PAGE>
Exhibit B to
Purchase Agreement No. 2371
Page 4

              (iii) any BFE equipment to be removed prior to flyaway and
       returned to MDC BFE stores for installation on Customer's subsequent
       Aircraft;

              (iv) a list of the names of the crew members and non-revenue
       passengers that will be aboard the ferry flight; and

              (v) a complete ferry flight itinerary.

4.     DELIVERY ACTIONS BY MDC.

       4.1 Schedule of Inspections. All FAA, MDC, Customer and, if required,
U.S. Customs Bureau inspections will be scheduled by MDC for completion prior to
delivery or departure of the Aircraft. Customer will be informed of such
schedules.

       4.2 Schedule of Demonstration Flights. All FAA and Customer demonstration
flights will be scheduled by MDC for completion prior to delivery of the
Aircraft.

       4.3 Schedule for Customer's Flight Crew. At least 10 days prior to the
scheduled delivery date of each aircraft, MDC will inform Customer of the date
that a flight crew is required for acceptance routines associated with delivery
of the Aircraft.

       4.4 Fuel Provided by MDC. MDC will provide to Customer, without charge,
the amount of fuel shown in U.S. gallons in the table below for the model of
Aircraft being delivered and full capacity of engine oil at the time of delivery
or prior to the ferry flight of the Aircraft.

        Aircraft Model                        Fuel Provided
             717                                  1,000

       4.5 Flight Crew and Passenger Consumables. MDC will provide without
charge reasonable quantities of food, coat hangers, towels, toilet tissue,
drinking cups and soap for the first segment of the ferry flight for the
Aircraft.

       4.6 Delivery Papers, Documents and Data. MDC will have available at the
time of delivery of the Aircraft certain delivery papers, documents and data for
execution and delivery. If title for the Aircraft will be transferred to
Customer through a MDC sales subsidiary and if the Aircraft will be registered
with the FAA, MDC will pre-position in Oklahoma City, Oklahoma, for filing with
the FAA at the time of delivery of the Aircraft an executed original Form
8050-2, Aircraft Bill of Sale, indicating transfer of title to the Aircraft from
MDC's sales subsidiary to Customer.

                                      B-4
<PAGE>

       4.7 Delegation of Authority. If specifically requested in advance by
Customer, MDC will present a certified copy of a Resolution of Boeing's Board of
Directors, designating and authorizing certain persons to act on its behalf in
connection with delivery of the Aircraft.

5.     DELIVERY ACTIONS BY CUSTOMER.

       5.1 Financing Arrangements. As soon as practicable, Customer will advise
MDC of any special financing arrangements in connection with the delivery
including Customer's intent to assign the Aircraft to a third party at time of
title transfer.

       5.2 BFE Value. No later than 90 days prior to delivery, Customer will
provide a BFE invoice reflecting the total amount of BFE installed on the
Aircraft.

       5.3 Fuel Receipt. At delivery Customer will execute a fuel receipt
acknowledging the amount of fuel loaded on the Aircraft prior to the ferry
flight. Boeing will invoice Customer for this fuel less the amount provided at
no charge as set forth in paragraph 4.4 above.

       5.4 Aircraft Radio Station License. At delivery Customer will provide its
Aircraft Radio Station License to be placed on board the Aircraft following
delivery.

       5.5. Aircraft Flight Log. At delivery Customer will provide the Aircraft
Flight Log for the Aircraft.

       5.6 Delegation of Authority. Customer will present to MDC at delivery of
the Aircraft an original or certified copy of Customer's Delegation of Authority
designating and authorizing certain persons to act on its behalf in connection
with delivery of the specified Aircraft.

       5.7 Affidavit of Arrival. No later than 14 days after delivery, Customer
will submit to Boeing an Affidavit of Arrival indicating the date and airport at
which the ferry flight was completed.

                                      B-5
<PAGE>

                              ESCALATION ADJUSTMENT

                         AIRFRAME AND OPTIONAL FEATURES

                                     between

                          MCDONNELL DOUGLAS CORPORATION

                                       and

                         Midwest Express Airlines, Inc.

           Supplemental Exhibit AE1 to Purchase Agreement Number 2371

             (For Model 717-200, 737-600, 737-700, 737-800, 737-900,
              777-200X and 777-300X the Airframe Price Includes the
                    Engine Price at its basic thrust level.)

<PAGE>

1.     Formula.

       Airframe and Optional Features price adjustments (Airframe Price
Adjustment) are used to allow prices to be stated in current year dollars at the
signing of this Purchase Agreement and to adjust the amount to be paid by
Customer at delivery for the effects of economic fluctuation. The Airframe Price
Adjustment will be determined at the time of Aircraft delivery in accordance
with the following formula:

         Pa = (P+B)(L + M) - P

         Where:

                     Pa =  Airframe Price Adjustment.  (For Model 717-200,
                           737-600, 737-700, 737-800, 737-900, 777-200X and
                           777-300X the Airframe Price includes the Engine Price
                           at its basic thrust level.)

                      L =  .65 x ( ECI
                                  -----
                                   ECIb)   where ECIb is the base
                                           year index (as set forth in
                                           Table 1 of this Purchase
                                           Agreement)

                      M =  .35 x ( ICI
                                  -----
                                   ICIb)   where ICIb is the base year index
                                           (as set forth in Table 1 of this
                                           Purchase Agreement)

                      P =  Airframe Price plus Optional Features Price (as set
                           forth in Table 1 of this Purchase Agreement).

                      B =  0.005 x (N/12) x (P) where N is the calendar month
                                                and year of scheduled Aircraft
                                                delivery minus the calendar
                                                month and year of the Base Price
                                                Year, both as shown in Table 1
                                                of this Purchase Agreement.

                      ECI is a value determined using the U.S. Department of
                      Labor, Bureau of Labor Statistics "Employment Cost Index
                      for workers in aerospace manufacturing - Wages and
                      Salaries" (ECI code 3721W), calculated by establishing a
                      three-month arithmetic average value (expressed as a
                      decimal and rounded to the nearest tenth) using the values
                      for the fifth, sixth and seventh months prior to the month
                      of scheduled delivery of the applicable Aircraft. As the
                      Employment Cost Index values are only released on a
                      quarterly basis, the value released for the month of March
                      will be used for the months of January and February; the
                      value for June

<PAGE>

                      used for April and May; the value for September used for
                      July and August; and the value for December used for
                      October and November.

                      ICI is a value determined using the U.S. Department of
                      Labor, Bureau of Labor Statistics "Producer Prices and
                      Price Index - Industrial Commodities Index ", calculated
                      as a 3-month arithmetic average of the released monthly
                      values (expressed as a decimal and rounded to the nearest
                      tenth) using the values for the 5th, 6th and 7th months
                      prior to the month of scheduled delivery of the applicable
                      Aircraft.

                      As an example, for an Aircraft scheduled to be delivered
                      in the month of January, the months June, July and August
                      of the preceding year will be utilized in determining the
                      value of ECI and ICI.

Note:  i. In determining the values of L and M, all calculations and resulting
       values will be expressed as a decimal rounded to the nearest
       ten-thousandth.

       ii. .65 is the numeric ratio attributed to labor in the Airframe Price
       Adjustment formula.

       iii. .35 is the numeric ratio attributed to materials in the Airframe
       Price Adjustment formula.

       Iv. The denominators (base year indices) are the actual average values
       reported by the U.S. Department of Labor, Bureau of Labor Statistics
       (base year June 1989 = 100). The applicable base year and corresponding
       denominator is provided by Boeing in Table 1 of this Purchase Agreement.

       iv. The final value of Pa will be rounded to the nearest dollar.

       vi. The Airframe Price Adjustment will not be made if it will result in a
       decrease in the Aircraft Basic Price.

2.     Values to be Utilized in the Event of Unavailability.

       2.1 If the Bureau of Labor Statistics substantially revises the
methodology used for the determination of the values to be used to determine the
ECI and ICI values (in contrast to benchmark adjustments or other corrections of
previously released values), or for any reason has not released values needed to
determine the applicable Airframe Price Adjustment, the parties will, prior to
the delivery of any such Aircraft, select a substitute from other Bureau of
Labor Statistics data or similar data reported by non-governmental
organizations. Such substitute will result in the same adjustment, insofar as
possible, as would have been calculated utilizing the original values adjusted
for fluctuation during the applicable time period. However, if within 24 months
after delivery of the Aircraft, the Bureau of Labor Statistics should resume
releasing values for the months needed to determine the Airframe Price
Adjustment, such values will be used to determine any increase or decrease in
the Airframe Price Adjustment

<PAGE>

for the Aircraft from that determined at the time of delivery of the Aircraft. A
credit memorandum or supplemental invoice will be issued for the Airframe Price
Adjustment difference. Interest charges will not apply for the period of
original invoice to issuance of credit memorandum or supplemental invoice.

         2.2 Notwithstanding Article 2.1 above, if prior to the scheduled
delivery month of an Aircraft the Bureau of Labor Statistics changes the base
year for determination of the ECI and ICI values as defined above, such re-based
values will be incorporated in the Airframe Price Adjustment calculation.

         2.3 In the event escalation provisions are made non-enforceable or
otherwise rendered void by any agency of the United States Government, the
parties agree, to the extent they may lawfully do so, to equitably adjust the
Aircraft Price of any affected Aircraft to reflect an allowance for increases or
decreases in labor compensation and material costs occurring since February of
the price base year shown in the Purchase Agreement which is consistent with the
applicable provisions of paragraph 1 of this Supplemental Exhibit AE1.

         2.4 If within 12 months of Aircraft delivery, the published index
values are revised due to an acknowledged error by the Bureau of Labor
Statistics, the Airframe Price Adjustment will be re-calculated using the
revised index values (this does not include those values noted as preliminary by
the Bureau of Labor Statistics). A credit memorandum or supplemental invoice
will be issued for the Airframe Price Adjustment difference. Interest charges
will not apply for the period of original invoice to issuance of credit
memorandum or supplemental invoice.

Note:  i. The values released by the Bureau of Labor Statistics and available to
       Boeing 30 days prior to the scheduled delivery month of an Aircraft will
       be used to determine the ECI and ICI values for the applicable months
       (including those noted as preliminary by the Bureau of Labor Statistics)
       to calculate the Airframe Price Adjustment for the Aircraft invoice at
       the time of delivery. The values will be considered final and no Airframe
       Price Adjustments will be made after Aircraft delivery for any subsequent
       changes in published Index values, subject always to paragraph 2.4 above.

       ii. The maximum number of digits to the right of the decimal after
       rounding utilized in any part of the Airframe Price Adjustment equation
       will be 4, where rounding of the fourth digit will be increased to the
       next highest digit when the 5th digit is equal to 5 or greater.

<PAGE>
                       BUYER FURNISHED EQUIPMENT VARIABLES

                                     between

                          MCDONNELL DOUGLAS CORPORATION

                                       and

                         Midwest Express Airlines, Inc.

           Supplemental Exhibit BFE1 to Purchase Agreement Number 2371

                                      BFE1
<PAGE>
                       BUYER FURNISHED EQUIPMENT VARIABLES

                                   relating to

                             MODEL 717-2BL AIRCRAFT

This Supplemental Exhibit BFE1 contains vendor selection dates, on-dock dates
and other variables applicable to the Aircraft.

1.       Supplier Selection.

         Customer will:

         1.1      Select and notify MDC of the suppliers of the following BFE
items by the following dates:

            Galley System                       December 14, 2001
                                               ---------------------

            Seats (passenger)                    November 16, 2001
                                               ---------------------

                                     BFE1-1
<PAGE>

2.       On-dock Dates

MDC will provide to Customer prior to June 29, 2001 a BFE Requirements
On-Dock/Inventory Document (BFE Document) or an electronically transmitted BFE
Report which may be periodically revised, setting forth the items, quantities,
on-dock dates and shipping instructions relating to the in-sequence installation
of BFE.

                                     BFE1-2
<PAGE>

                           CUSTOMER SUPPORT VARIABLES

                                     between

                          MCDONNELL DOUGLAS CORPORATION

                                       and

                         Midwest Express Airlines, Inc.

           Supplemental Exhibit CS1 to Purchase Agreement Number 2371

                                      CS1

<PAGE>

                           CUSTOMER SUPPORT VARIABLES

                                   relating to

                           MDC MODEL 717-2BL AIRCRAFT

Customer and MDC will conduct planning conferences approximately 12 months
before delivery of the first Aircraft, or as otherwise agreed, to develop and
schedule a customized Customer Support Program to be furnished by MDC in support
of the Aircraft.

The customized Customer Support Program will be based upon and equivalent to the
entitlements summarized below. Unless explicitly provided otherwise, all aspects
of the Customer Support Program shall be provided by MDC/Boeing at no added
charge to Customer.

Part 1: Maintenance and Flight Training Programs; Operations Engineering Support

1.     Maintenance Training.

       1.1    Airplane General Familiarization Course; 1 class of 24 students;

       1.2    Mechanical/Power Plant Course; 2 classes of 15 students;

       1.3    Electrical Systems Course; 2 classes of 15 students;

       1.4    Avionics Systems Course; 2 classes of 15 students;

       1.5    Composite Repair Course for Technicians; 1 class of 8 students;

       1.6    Corrosion Prevention and Control Course; 1 class of 10 students;

       1.7    Airplane Rigging Course; 1 class of 6 students;

       1.8    Training materials will be provided to each student. In addition,
              one set of training materials used in MDC's training program,
              including visual aids, Computer Based Training Courseware,
              instrument panel wall charts, text/graphics, video programs, etc.
              will be provided for use in Customer's own training program. Items
              will be provided without revision service.

                                     CS1-1
<PAGE>
2.     Flight Training.

       2.1    Transition training for 8 flight crews (16 pilots); The training
              will consist of ground school (utilizing computer based training),
              fixed base simulator, full flight simulator.

       2.2    Flight Dispatcher training; 2 classes of 6 students;

       2.3    Flight Attendant training; 2 classes of 12 students;

       2.4    Performance Engineer Training; will be provided at MDC's facility.

       2.5    One copy of the Flight Crew Operating Manual (FCOM) will be
              provided to each student. In addition, one set of training
              materials as used in MDC's training program, including visual
              aids, Computer Based Training Courseware (Microsoft compatible),
              instrument panel prints, text/graphics, video programs, etc. will
              be provided. Customer is hereby granted a license to modify and
              copy the Computer Based Training Courseware provided hereunder
              solely for training Customer's employees.

       2.6    Additional Flight Operations Services:

              a.     MDC flight crew personnel to assist in ferrying the first
                     aircraft to Customer's main base;

              b.     Instructor pilots for 90 instructor pilot days for revenue
                     service training assistance;

              c.     An instructor pilot to visit Customer 6 months after
                     revenue service training to review Customer's flight crew
                     operations for a 2 week period.

                                     CS1-2
<PAGE>
3.     Planning Assistance.

       3.1    Maintenance and Ground Operations.

              a)     Maintenance Program Planning - Provide technical assistance
                     in planning aircraft maintenance requirements and
                     documentation.

              b)     Ground Support Equipment Planning - Recommend ground
                     support equipment necessary for operation of the aircraft
                     and provide a summary of ground support equipment suitable
                     for use in maintenance and servicing.

              c)     Maintenance Engineering Operations Review - Upon request,
                     MDC will conduct a maintenance operations review consisting
                     of assistance to analyze Customer's current maintenance and
                     engineering operational requirements, reliability and
                     maintenance specifications, maintenance costs and
                     reliability accounting practices. The objective of such
                     review is to improve the interactions of operations,
                     engineering, maintenance and logistics for improved
                     operational effectiveness. MDC will provide the findings
                     and recommendations in a report to the Customer. This
                     service will be available until one year after delivery of
                     the last Aircraft.

       3.2    Spares.

              a)     Recommended Spares Parts List (RSPL)

                     customized RSPL, data and documents will be provided to
                     identify spare parts required for Customer's support
                     program.

              b)     Illustrated Parts Catalog (Provisioning IPC)
                     A customized Provisioning IPC in accordance with ATA 100
                     will be provided.

              c)     Provisioning Training
                     Provisioning training will be provided for Customer's
                     personnel at MDC's facilities, where documentation and
                     technical expertise are available. Training is focused on
                     the initial provisioning process and calculations reflected
                     in the MDC RSPL.

              d)     Spares Provisioning Conference
                     A provisioning conference will be conducted, normally at
                     MDC's facilities where technical data and personnel are
                     available.

4:     Technical Publications Data

                                     CS1-3
<PAGE>

       The Technical Publications provided by MDC are listed below. Except for
the Illustrated Parts Catalog (IPC), Boeing will at no charge to Customer
provide revisions to such Technical Publications Data reflecting changes
developed by Boeing, for as long as Customer operates an Aircraft. Revisions to
the IPC are provided free of charge until three months after delivery of the
last Aircraft.

       A.     Maintenance Engineering Data
              -----------------------------------
              Access Door Diagrams & Data Sheets
              Aircraft Recovery Manual
              Component Description & Location List
              FAA Maintenance Review Board Report
              Maintenance Check Manual (work cards)
              Maintenance Facility and Equipment Planning Manual
              On-Aircraft Maintenance Planning Report
              Special Tool & Equipment Drawings
              Support Equipment Summary
              Aircraft Zoning Report
              Structural Diagrams Reference Manual

       B.     Technical Publications Data.
              ---------------------------
              Flight Crew Operating Manual
              Aircraft Maintenance Manual
              Systems Schematics Manual
              Seller Overhaul/Component Maintenance Manual
              Wiring Diagram Manual
              Illustrated Tool & Equipment Lists
              Nondestructive Test Manual
              Nondestructive Testing Standard Practices Manual
              Structural Repair Manual
              Service Bulletins
              Service Bulletin Index
              Illustrated Parts Catalog
              Fault Isolation Manual
              Fault Reporting Manual
              Standard Wiring Practices Manual (Ch.20)
              Spares Interchangeability Manual
              Cross Reference Index

       C.     Engineering Data
              -------------------
              Aircraft Characteristics for Airport Planning
              Design Handbook
              Douglas Material Specifications Manual
              Douglas Process Material Index
              Douglas Process Standards Manual
              Drafting Manual

                                     CS1-4
<PAGE>

              Drawing Section List
              Engineering Drawings
              FAA Approved Airplane Flight Manual
              Flying Qualities Report
              Dispatch Deviation Guide
              On-Board Wiring Diagram Book
              Approved Equivalent Parts List
              Master Minimum Equipment List
              Douglas Standards Manual
              Master Component List
              Flight Planning and Performance Manual
              Weight & Balance Manual, Chapter1
              Weight & Balance Manual, Chapter 2
              Weight & Balance Manual, Chapter 1 & 2, On-Board Copy
              Weight Compliance Report
              Performance Engineer's Manual
              Airworthiness Limitation Instructions
              SCAP (Standard Computerized Airplane Performance) Module for
               Takeoff and Landing

       D.     Spares Data
              ------------
              Overhaul Manual/Component Maintenance Manual Index
              Product Support Supplier Directory
              Product Support Supplier Agreements Manual
              Supplier Technical Data
                a.   Component Maintenance/Overhaul Manuals
                b.   Service Bulletins
                c.   Ground Support Equipment Data
                d.   Provisioning Data
                e.   Publications Index

              Technical Data Report

       E.     Flight Technical Data
              ----------------------
              Operational Performance Software
                a.   Enroute performance program for flight planning and mission
                       studies
                b.   Cruise audit (performance monitoring) program

                                     CS1-5
<PAGE>
                               ENGINE ESCALATION,
                      ENGINE WARRANTY AND PATENT INDEMNITY

                                     between

                          MCDONNELL DOUGLAS CORPORATION

                                       and

                         Midwest Express Airlines, Inc.

           Supplemental Exhibit EE1 to Purchase Agreement Number 2371

<PAGE>
                               ENGINE ESCALATION,
                      ENGINE WARRANTY AND PATENT INDEMNITY

                                   relating to

                             MODEL 717-2BL AIRCRAFT

1. ENGINE ESCALATION. No separate engine escalation methodology is defined for
the 717-200 Aircraft. Pursuant to the AGTA, the engine prices for these Aircraft
are included in and will be escalated in the same manner as the Airframe.

2. ENGINE WARRANTY AND PRODUCT SUPPORT PLAN. MDC has obtained from BMW
Rolls-Royce GmbH the right to extend to Customer the provisions of BMW
Rolls-Royce Warranty Agreement "BR715 Engine Warranty Agreement" (hereafter
referred to as "Warranty Agreement") subject, however to Customer's acceptance
of the conditions set forth therein. Accordingly, MDC hereby extends to Customer
and Customer hereby accepts that the provisions of the Warranty Agreement shall
apply to Engines installed in the Aircraft at the time of delivery, provided
that the Customer may, by notice given to MDC and BMW Rolls-Royce prior to
delivery of the Aircraft, elect to substitute for the Warranty Agreement any
corresponding warranty included either in a General Terms Agreement currently
effective between Customer and BMW Rolls-Royce or in a contract for the sale by
BMW Rolls-Royce to Customer of engines. In consideration for such extension,
Customer hereby releases and discharges MDC from any and all claims, obligations
and liabilities whatsoever arising out of the purchase or use of said installed
engines, except for obligations or liabilities arising from the location or
mounting of the engines on the aircraft, and releases and discharges BMW
Rolls-Royce from any and all claims, obligations and liabilities whatsoever
arising out of the purchase or use of said installed engines except as otherwise
expressly assumed by BMW Rolls-Royce in such Warranty Agreement.

Copies of this Warranty Agreement may be obtained directly from BMW Rolls-Royce.

                                     EE1-1
<PAGE>
                         SERVICE LIFE POLICY COMPONENTS

                                     between

                          MCDONNELL DOUGLAS CORPORATION

                                       and

                         Midwest Express Airlines, Inc.

           Supplemental Exhibit SLP1 to Purchase Agreement Number 2371

                                      SLP1
<PAGE>
                         SERVICE LIFE POLICY COMPONENTS

                                   relating to

                             MDC MODEL 717 AIRCRAFT

This is the listing of SLP Components for the Aircraft which relate to Part 3,
Boeing Service Life Policy of Exhibit C, Product Assurance Document to the AGTA
and is a part of Purchase Agreement No. 2371.

1.     Pylons

        (a)  Front engine mount yoke
        (b)  Spars (including spar caps, webs and stiffeners)
        (c)  Front engine mount to pylon attach fitting
        (d)  Aft engine mount to pylon attach fitting
        (e)  Upper and lower skin and stiffeners between spars
        (f)  Pylon to fuselage attach angles and fittings

2.     Wings

        (a)  Front and rear spars (including spar caps, webs and stiffeners)
        (b)  Upper and lower stringers and skin between spars
        (c)  Landing gear bulkhead and landing gear attach fitting
        (d)  Bulkhead at side of fuselage, including trapezoidal panel
        (e)  Ribs in the wing
        (f)  Wing to fuselage attach tee
        (g)  Wing flap attach fittings

3.     Fuselage

       Frames, plating, longerons and pressure bulkheads, but excluding all
non-load carrying access doors.

4.     Empennage

        (a)  Vertical stabilizer spars and skin between spars
        (b)  Aft fuselage vertical stabilizer carry-through structure
        (c)  Horizontal stabilizer spars, integral skin and stringers between
              spars, and pivot fittings

                                      SLP1
<PAGE>

5.     Landing Gear Components

       (1)    Main Gear

              (a)  Cylinder
              (b)  Piston/axle
              (c)  Side brace (upper and lower)
              (d)  Fixed side brace
              (e)  Orifice support tube
              (f)  Torque links

         (2)   Nose Gear

              (a)  Housing
              (b)  Piston
              (c)  Axle
              (d)  Orifice support tube
              (e)  Cylinder
              (f)  Torque links
              (g)  Cross tube
              (h)  Drag links (upper and lower)

NOTE: The Service Life Policy does not cover any bearings, bolts, bushings,
clamps, brackets, actuating mechanisms or latching mechanisms used in or on the
Covered Components.

                                      SLP1
<PAGE>

                          Supplemental Agreement No. 1

                                       to

                           Purchase Agreement No. 2371

                                     between

                        The McDonnell Douglas Corporation

                                       And

                         Midwest Express Airlines, Inc.

                       Relating to Model 717-2BL Aircraft

       THIS SUPPLEMENTAL AGREEMENT, entered into as of the April 12, 2002, by
and between The McDonnell Douglas Corporation, (MDC), and Midwest Express
Airlines, Inc. (Customer);

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

       WHEREAS, the parties entered into that certain Purchase Agreement No.
2371, dated September 28, 2001, relating to the purchase and sale of certain MDC
Model 717-2BL aircraft (the Aircraft), which agreement, with all exhibits,
specifications and letter agreements related to or attached thereto, is
hereinafter called the "Purchase Agreement"; and

       WHEREAS, Customer agrees (i) to exercise five Purchase Rights Aircraft,
thereby increasing the total number of Aircraft to twenty-five, (ii) to
re-schedule the twenty-five Aircraft to one a month, and (iii) to certain other
matters:

       NOW THEREFORE, in consideration of the mutual covenants herein contained,
the parties hereto agree to supplement the Purchase Agreement as follows:

       All terms used herein and in the Purchase Agreement, and not defined
herein, shall have the same meaning as in the Purchase Agreement.

1.     To reflect the exercise of five purchase rights and the re-scheduling of
       the twenty-five Aircraft to a rate of one per month beginning in February
       2003, Table 1 to the Purchase Agreement is hereby deleted in its entirety
       and replaced with a new Table 1 which is attached hereto.

                                      S1-1
<PAGE>
Supplemental Agreement 1 to                                               page 2
Purchase Agreement No. 2371

2.     MDC and Customer have agreed to amend certain other business matters,
       therefore Letter Agreement No 6-1162-RCN-1481 is hereby deleted in its
       entirety and replaced with a new Letter Agreement No. 6-1162-RCN-1481R1
       which is attached hereto.

EXECUTED as of the day and year first above written.

MCDONNELL DOUGLAS CORP.                     MIDWEST EXPRESS AIRLINES, INC.

By: /s/ Rick Nelson                         By: /s/ Timothy E. Hoeksema
   ------------------------------              ------------------------

Its: Attorney-In-Fact                       Its: Chairman of the Board,
                                                 President and Chief
                                                 Executive Officer

                                      S1-2
<PAGE>
Airframe Model/MTGW:               717-200          114,000
Engine Model:                   BR700-715A1-30
Airframe Price:                                               $32,017,000
Optional Features:                                               $789,800
                                                               ----------
Sub-Total of Airframe and Features:                           $32,806,800
Engine Price (Per Aircraft):                                           $0
Aircraft Basic Price (Excluding BFE/BDE):                     $32,806,800
                                                               ==========
Buyer Furnished Equipment (BFE) Estimate:                        $600,000
Buyer Designated Equipment (BDE) Estimate:                             $0

Refundable Deposit per Aircraft at Proposal Acceptance:           $75,000

Detail Specification:        CS7172F (2/1/2000)
Price Base Year:             Jul-00              00A

 Airframe and  Engine Escalation Data:
Base Year Index (ECI):                    145.40
Base Year Index (ICI):                    130.30

<TABLE>
<CAPTION>
                                                               Advance Payment Per Aircraft (Amts. Due/Mos. Prior to Delivery):
                           Escalation    Escalation Estimate  ------------------------------------------------------------------
  Delivery    Number of      Factor       Adv Payment Base    At Signing      24 Mos.     21/18/12/9/6 Mos.           Total
    Date      Aircraft     (Airframe)      Price Per A/P          1%            4%               5%                    30%
    ----      --------     ----------      -------------          --            --               --                    ---
<S>               <C>        <C>            <C>                <C>          <C>              <C>                   <C>
  Feb-2003        1          1.1011         $36,124,000        $286,240     $1,444,960       $1,806,200            $10,837,200
  Mar-2003        1          1.1037         $36,209,000        $287,090     $1,448,360       $1,810,450            $10,862,700
  Apr-2003        1          1.1069         $36,314,000        $288,140     $1,452,560       $1,815,700            $10,894,200
  May-2003        1          1.1093         $36,393,000        $288,930     $1,455,720       $1,819,650            $10,917,900
  Jun-2003        1          1.1125         $36,498,000        $289,980     $1,459,920       $1,824,900            $10,949,400
  Jul-2003        1          1.1154         $36,593,000        $290,930     $1,463,720       $1,829,650            $10,977,900
  Aug-2003        1          1.1187         $36,701,000        $292,010     $1,468,040       $1,835,050            $11,010,300
  Sep-2003        1          1.1222         $36,816,000        $293,160     $1,472,640       $1,840,800            $11,044,800
  Oct-2003        1          1.1259         $36,937,000        $294,370     $1,477,480       $1,846,850            $11,081,100
  Nov-2003        1          1.1294         $37,052,000        $295,520     $1,482,080       $1,852,600            $11,115,600
  Dec-2003        1          1.1321         $37,141,000        $296,410     $1,485,640       $1,857,050            $11,142,300
  Jan-2004        1          1.1347         $37,226,000        $297,260     $1,489,040       $1,861,300            $11,167,800
  Feb-2004        1          1.1373         $37,311,000        $298,110     $1,492,440       $1,865,550            $11,193,300
  Mar-2004        1          1.1402         $37,406,000        $299,060     $1,496,240       $1,870,300            $11,221,800
  Apr-2004        1          1.143          $37,498,000        $299,980     $1,499,920       $1,874,900            $11,249,400
  May-2004        1          1.1457         $37,587,000        $300,870     $1,503,480       $1,879,350            $11,276,100
  Jun-2004        1          1.1489         $37,692,000        $301,920     $1,507,680       $1,884,600            $11,307,600
  Jul-2004        1          1.1521         $37,797,000        $302,970     $1,511,880       $1,889,850            $11,339,100
  Aug-2004        1          1.155          $37,892,000        $303,920     $1,515,680       $1,894,600            $11,367,600
  Sep-2004        1          1.1588         $38,017,000        $305,170     $1,520,680       $1,900,850            $11,405,100
  Oct-2004        1          1.1623         $38,131,000        $381,310     $1,525,240       $1,906,550            $11,514,300
  Nov-2004        1          1.1658         $38,246,000        $382,460     $1,529,840       $1,912,300            $11,548,800
  Dec-2004        1          1.168          $38,318,000        $383,180     $1,532,720       $1,915,900            $11,570,400
  Jan-2005        1          1.1706         $38,404,000        $384,040     $1,536,160       $1,920,200            $11,596,200
  Feb-2005        1          1.1728         $38,476,000        $384,760     $1,539,040       $1,923,800            $11,617,800
</TABLE>
<PAGE>
Midwest Express Airlines, Inc.
6744 South Howell Avenue
Oak Creek, Wisconsin 53154

Subject:       Other Matters - *

Reference:     Purchase Agreement No. 2371 (The Purchase Agreement) between
               McDonnell Douglas Corporation (MDC) and Midwest Express Airlines,
               Inc.(Customer) relating to Model 717-2BL aircraft (the Aircraft)

This letter amends the Purchase Agreement. All terms used but not defined in
this Letter Agreement shall have the same meaning as in the Purchase Agreement.

*

*
*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>

MDC and Customer agree that this Letter Agreement is confidential and shall not
disclose it or its contents to any third party, except associated companies,
subsidiaries or affiliates of Customer or MDC and their financial and legal
advisors and potential financiers (provided such advisors and financiers are
under a prior written obligation to keep this Letter Agreement and its terms
confidential), as required by law, the Security Exchange Commission (SEC), or as
required to perform and enforce the terms hereof, without the prior written
consent of the other party, which shall not be unreasonably withheld.

Sincerely,

MCDONNELL DOUGLAS CORPORATION,

BY  /s/ Rick Nelson
----------------------------

ITS Attorney-In-Fact

ACCEPTED AND AGREED TO THIS

DATE: September 28, 2001

MIDWEST EXPRESS AIRLINES, INC.

BY /s/ Timothy E. Hoeksema

ITS Chairman of the Board, President
    and Chief Executive Officer

<PAGE>
Midwest Express Airlines, Inc.
6744 South Howell Ave.
Oak Creek, WI 53154

Subject:          *

Reference (1)     Purchase Agreement No. 2371 (the Purchase Agreement) between
                  The McDonnell Douglas Corporation a wholly-owned subsidiary of
                  The Boeing Company ("MDC") and Midwest Express Airlines, Inc.
                  ("Customer") relating to Model 717-2BL aircraft (the
                  "Aircraft")

Reference (2)     Boeing Document MDC-98K9020, Revision C, Performance of the
                  Boeing Jet Transport Model 717-200 with BR700-715 Engines

This Letter Agreement amends and supplements the Purchase Agreement. All terms
used but not defined in this Letter Agreement have the same meaning as in the
Purchase Agreement.

*

1.   *
2.   *
3.   *
4.   *
5.   *
6.   *
7.   *

8.   Confidentiality. MDC and Customer agree that this Letter Agreement is
     confidential and shall not disclose it or its contents to any thid party,
     except associated companies, subsidiary or affiliates of MDC or Boeing
     and their financial and legal advisors and potential financiers (provided
     such advisors and financiers are under a prior written obligation to keep
     this Letter Agreement and its terms confidential), as required by law,
     the Security Exchange Commission (SEC), or as required to performand
     enforce the terms hereof, without the prior written consent of the other
     party, which shall not be unreasonably withheld.

Very truly yours

MCDONNELL DOUGLAS CORPORATION,

BY  /s/ Rick Nelson
----------------------------

ITS Attorney-In-Fact

ACCEPTED AND AGREED TO THIS

DATE: September 28, 2001

MIDWEST EXPRESS AIRLINES, INC.

BY /s/ Timothy E. Hoeksema

ITS Chairman of the Board, President
    and Chief Executive Officer

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.  A portion of this page and two additional
    pages were redacted (the page following the redacted pages contained Item 8
    and the signatures).
<PAGE>

Attachment A

                                       *

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.  Represents only one redacted page.

<PAGE>

Midwest Express Airlines, Inc.
6744 South Howell Avenue
Oak Creek, Wisconsin 53154

Subject:        Supplemental Agreement No. 1 and the Deferral of Payment of
                Advance Payments

Reference:      Purchase Agreement No. 2371 (The "Purchase Agreement") between
                The McDonnell Douglas Corporation a wholly-owned subsidiary of
                The Boeing Company ("MDC") and Midwest Express Airlines, Inc.
                ("Customer") relating to Model 717-2BL aircraft (the "Aircraft")

       This Letter Agreement amends the Purchase Agreement. All terms used but
not defined in this Letter Agreement shall have the same meaning as in the
Agreement.

       MDC and Customer intend to execute Supplemental Agreement No.1 to the
Purchase Agreement by April 5, 2002. Such Supplemental Agreement amends the
Purchase Agreement to accelerate deliveries to a rate of one aircraft every
month and provides certain other considerations. However, as of the date of this
Letter Agreement, Customer has not completed the related agreements it desires
for the financing of i) certain advance payments and also ii) the financing of
the Aircraft.

       In order to give Customer additional time to enter into an agreement with
Rolls-Royce ("Rolls") to finance certain advance payments, MDC hereby agrees to
defer payment until *, that portion of advance payments which otherwise would be
due on April 1, 2002, and which Customer intends to finance via such Rolls
Agreement. The amount of advance payments Customer intends to finance via the
Rolls agreement is equal to *. Customer agrees to pay to MDC an advance payment
by April 1, 2002, equal to *.

       MDC and Customer agree that this Letter Agreement is confidential and
shall not disclose it or its contents to any third party, except associated
companies, subsidiaries or affiliates of Customer or MDC and their financial and
legal advisors and potential financiers (provided such advisors and financiers
are

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>

under a prior written obligation to keep this Letter Agreement and its terms
confidential), as required by law, the Securities and Exchange Commission (SEC),
or as required to perform and enforce the terms hereof, without the prior
written consent of the other party, which shall not be unreasonably withheld.

Very truly yours,

MCDONNELL DOUGLAS CORPORATION

By  /s/ Rick Nelson
  ------------------------------------

Its           Attorney-In-Fact
   --------------------------------------

ACCEPTED AND AGREED TO this

Date:    September 28, 2001
      ---------------

MIDWEST EXPRESS AIRLINES, INC.

By  /s/ Timothy E. Hoeksema
  ------------------------------------------

Its Chairman of the Board, Chief
    Executive Officer and President

<PAGE>
Midwest Express Airlines, Inc.
6744 South Howell Avenue
Oak Creek, Wisconsin  53154

Subject:        Aircraft Performance Guarantees

Reference:      Purchase Agreement No. 2371 (the "Purchase Agreement") between
                The McDonnell Douglas Corporation a wholly-owned subsidiary of
                The Boeing Company ("MDC") and Midwest Express Airlines, Inc.
                ("Customer") relating to Model 717-2BL aircraft (the "Aircraft")

This Letter Agreement amends and supplements the Purchase Agreement. All terms
used but not defined in this Letter Agreement have the same meaning as in the
Purchase Agreement.

MDC agrees to provide Customer with the performance guarantees in the
Attachment. The interior sound levels contained in section 4 of the Attachment
will be revised to * prior to executing the Purchase Agreement.

These guarantees are exclusive as to the Aircraft performance and expire upon
delivery of the Aircraft to Customer. *

MDC and Customer agree that this Letter Agreement is confidential and shall not
disclose it or its contents to any third party, except associated companies,
subsidiaries or affiliates of Customer or MDC and their financial and legal
advisors (provided such advisors are under a prior written obligation to keep
this Letter Agreement and its terms confidential), as required by law, the
Security Exchange Commission (SEC), or as required to perform and enforce the
terms hereof, without the written permission of the others, which shall not be
unreasonably withheld.

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>

Very truly yours,

MCDONNELL DOUGLAS CORPORATION

By   /s/ Rick Nelson
  ------------------------------------------

Its           Attorney-In-Fact
   --------------------------------------

ACCEPTED AND AGREED TO this

Date:   September 28, 2001
      --------------

MIDWEST EXPRESS AIRLINES, INC.

By  /s/ Timothy E. Hoeksema
  ------------------------------------------

Its  Chairman of the Board, Chief
     Executive Officer and President

<PAGE>
Attachment to Letter Agreement
No. 6-1162-RCN-1476
BR700-715A1-30 Engines
Page 1

                                       *

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.  Twelve pages (including this page) were
    redacted.

<PAGE>

Midwest Express Airlines, Inc.
6744 South Howell Avenue
Oak Creek, Wisconsin  53154

Subject:     Business Considerations

Reference:   Purchase Agreement No. 2371 (the "Purchase Agreement") between The
             McDonnell Douglas Corporation a wholly-owned subsidiary of The
             Boeing Company ("MDC") and Midwest Express Airlines, Inc.
             ("Customer") relating to Model 717-2BL aircraft (the "Aircraft")

This Letter Agreement amends and supplements the Purchase Agreement. All terms
used but not defined in this Letter Agreement have the same meaning as in the
Purchase Agreement.

1.     CREDIT MEMORANDA.

       MDC offers to Customer the following package of credit memoranda:

       1.1    Special Credit Memorandum. MDC will provide concurrent with the
              delivery of each Aircraft and Purchase Right Aircraft a credit
              memo equal to * subject to escalation pursuant to Supplemental
              Exhibit AE1 of the Purchase Agreement (2000 $ STE). Such credit
              will be applied to the aircraft purchase price owed at delivery.

       1.2    Additional Credit Memorandum. MDC will provide a credit memo in
              the amount of * Aircraft and in the amount of * Aircraft. MDC will
              also provide a credit memo in the amount of *. Such credit memo
              does not escalate and may, at Customers option, be applied to the
              purchase of MDC Customer Support goods and services (e.g.
              training, spares, simulator data, GSE etc.), *, or to the aircraft
              purchase price owed at delivery.

       1.3    Maximum Takeoff Weight (MTOW) Credit. MDC will provide concurrent
              with the delivery of each Aircraft and Purchase Right Aircraft a
              credit memo *.

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>

              Such credit may only be applied to the price of such increased
              MTOW.

       1.4    Quantity Bonus Credit Memorandum. MDC will provide * a credit memo
              equal to *. Such credit may, at Customers option, be applied to
              the aircraft purchase price owed at delivery or the purchase of
              MDC Customer Support goods and services (e.g., training, spares,
              simulator data, GSE etc. ).

       1.5    Introductory Support Credit Memorandum. To support the
              introduction of the 717, MDC will provide * a credit memo equal to
              *. Such credit may, at Customer's option, be applied to the
              purchase of MDC Customer Support goods and services (e.g.
              training, spares, simulator data, GSE etc.) or against the
              purchase price of the aircraft.

       1.6    Supplemental Support Credit Memorandum. MDC will provide * a
              credit memo equal to * (does not escalate). Such credit may, at
              Customer's option, be applied to the aircraft purchase price owed
              at delivery or the purchase of MDC Customer Support goods and
              services (e.g., training, spares, simulator data, GSE etc.).

       1.7    * Credit Memorandum. MDC will provide * credit memo equal to *.
              Such credit memorandum will be applied to the aircraft purchase
              price owed at delivery.

2.     PURCHASE RIGHT AIRCRAFT.

       MDC will also provide a total of 25 purchase rights for model 717-200
aircraft (Purchase Right Aircraft) subject to the following:

       2.1    All Purchase Right Aircraft delivery positions are subject to an
              available delivery position (STAP) until exercise of the purchase
              right. *

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>

       2.2    Midwest Express may exercise a purchase right for any available
              position by providing written notice to MDC. The parties agree to
              use best efforts to amend the Purchase Agreement within 30 days of
              such written notice to add the exercised Purchase Right Aircraft
              as an Aircraft.

       2.3    The Basic Price of the exercised Purchase Right Aircraft will be
              *.

       2.4    The Performance Guarantees for the Purchase Right Aircraft will be
              the same as those for the initial 25 Aircraft, except that MDC may
              amend them to reflect the incorporation of any government mandated
              or standard changes to the model 717 aircraft.

       2.5    Except as otherwise indicated herein, the terms for the Purchase
              Right Aircraft will be the same as those for Firm Aircraft.

       2.6    The 25 total purchase rights available to Customer will decrease
              by *.

       2.7    All exercised Purchase Right Aircraft must be scheduled for
              delivery prior to *.

3.     *.

       3.1    *.

       3.2    The * payment will be paid monthly to Customer in the order
              and at the dates and in the amounts specified in the *
              Support Table.

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>

       3.3    *

       3.4    *

4.     *

       *

       4.1    *

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>

       4.2    Conditions. The * shall not be effective until the 15th day of the
              month following the month of delivery of the applicable Aircraft
              to Customer and is conditioned upon all of the following:

              4.2.1  *; and

              4.2.2  The delivery to Customer of applicable Aircraft *; and

              4.2.3  *.

5.     *

       5.1    *

       5.2    *

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>
              *

       5.3    *

6.     ACCEPTANCE DEPOSIT.

       Upon execution of this Letter Agreement the acceptance deposit paid by
Customer in the amount of $75,000 per Aircraft will be non-refundable.

7.     ALTERNATE ADVANCE PAYMENTS.

       Midwest Express may elect, subject to the conditions herein, to pay the
alternate advance schedule below in lieu of the standard advance payment
schedule contained in the Purchase Agreement. One alternate advance payment
schedule pertains to the initial 25 Aircraft, the second pertains to exercised
Purchase Right Aircraft.

       Initial 25 Aircraft

       |X|    *

       |X|    *

       |X|    Midwest Express agrees to pay interest on the difference between
              the advance payments hereunder and those otherwise due under the
              standard advance payment schedule in the Purchase Agreement. The
              interest rate will be *. Interest will compound quarterly and is
              due and payable on the delivery date for each aircraft.

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>

       Exercised Purchase Right Aircraft

       |X|    * of the Advance Payment Base Price for each Aircraft at the
              Definitive Agreement Date for the exercised Purchase Right
              Aircraft.

       |X|    * of the Advance Payment Base Price for each Aircraft on the
              first business day of each month * months prior to the
              scheduled month of delivery.

       |X|    Midwest Express agrees to pay interest on the difference between
              the advance payments hereunder and those otherwise due under the
              standard advance payment schedule in the Purchase Agreement. The
              interest rate will be *. Interest will compound quarterly and is
              due and payable on the delivery date for each aircraft.

8.     *

       8.1    *

       8.2    *

       8.3    *

       8.4    *

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>

9.     EXTENDED WARRANTY.

       MDC agrees to extend the standard Warranty Period contained in Exhibit C
of AGTA-MWE from 36 to *.

10.    PROMOTIONAL SUPPORT.

       MDC agrees to make available to Customer as of the delivery date of the
first Aircraft, * to be used for Customer's marketing and promotion
programs. These programs may include marketing research; tourism development;
corporate identity; direct marketing; video tape, or still photography;
planning, design and production of collateral materials; management of promotion
programs and advertising campaigns. There will be no cash payments or other
support in lieu thereof. Following the execution of this Letter Agreement, a MDC
Airline Promotion representative will meet with Customer's designated
representative to discuss the extent, selection, scheduling, and funds
disbursement process for the program.

11.    SETOFF RIGHTS AGAINST ADVANCE PAYMENTS.

       Customer agrees that in the event of a default of its obligations under
the Purchase Agreement, MDC may apply any or all advance payments paid
(including the acceptance deposit) by Customer with respect to an aircraft to
cure, in part or in whole, any default with respect to any other aircraft or
other obligation under the Purchase Agreement.

12.    MIDWEST EXPRESS HOLDINGS GUARANTEE.

       Midwest Express Holding, Inc. hereby agrees to guarantee the financial
obligations of Customer contained in the Purchase Agreement.

13.    WARRANTY FOR SERVICES.

       With respect to any service provided under AGTA-MWE or Purchase Agreement
No. 2371, MDC will provide the same warranty which would have applied had that
service been obtained under CSGTA-MWE.

14.    ORANGE COUNTY AIRPORT SUPPORT.

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>

       MDC will provide a technical support agreement to assist Customer in
obtaining regulatory approval to operate an Aircraft at Orange County Airport.
MDC will provide a credit memorandum concurrent with the delivery of the first
Aircraft in the amount of * which may only be applied to the price of such
technical services agreement.

15.    NOISE IMPROVEMENT.

       MDC will continue efforts aimed at improving the interior sound levels
for the model 717 aircraft until September 28, 2002, or *. Such efforts will
include the following:

       o      Further insulation blanket modifications
       o      Environmental Control Systems Modifications
       o      Fuselage skin damping material
       o      Engine isolator re-design\
       o      Hydraulic attenuators
       o      Forward upper fuselage antenna optimization

       If MDC identifies any changes which improve the interior noise level of
the model 717 aircraft, MDC will incorporate such change as a Developmental
Change in Customers Aircraft, provided that MDC determines in good faith that
such change is economical after consideration of the production cost and the
magnitude of the resulting noise level reduction.

       MDC also agrees to provide Customer * which may used to offset the price
of any noise reduction retrofit kit MDC makes generally available to its model
717 customers. One credit memorandum will be issued for each such kit ordered by
Customer and may only be applied to the purchase price of such kit.

16.    PRODUCTION MATTERS.

       For parts with published shelf lives, MDC agrees not to install in
production in any of Customers aircraft any part which has exceeded its shelf
life.

       If the circuitry of any electrical part has been `shorted-out' or
otherwise rendered inoperable due to an electrical overload condition and
thereby requiring a repair, Customer will accept such repair provided that MDC
provides a replacement part in a timely manner with respect to the circuitry
that was repaired. MDC agrees to treat the installation of such replacement part
as a warranty repair.

17.    FORM 8110-3 POLICY.

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>

       MDC's current policy is to provide 8110-3 forms pertaining to repairs to
first tier customers at no charge. Upon execution of Purchase Agreement No.
2371, Customer will become a first tier customer. MDC reserves the right to
change its policy with respect to 8110-3 forms at any time.

18.    PART SHORTAGES DUE TO 717 FLEET WIDE PROBLEMS.

       If Customer as-well-as other model 717 customers experience an "aircraft
on ground" situation due to a FAA airworthiness directive or similar government
directive and the parts required to satisfy such directive are in limited
supply, MDC will treat Customer no less favorably than any other customer with
respect to allocation of those parts.

19.    ADDITIONAL RIGGING CLASS STUDENTS.

       Paragraph 1.7 of Part 1 to Supplemental Exhibit CS1 to Purchase Agreement
No. 2371 provides for one airplane rigging class for up to 6 students. MDC
agrees at no charge to Customer to either (1) increase the class size to 12
students or (2) to provide an additional class of 6 students.

20.    NEGOTIATIONS FOR USED AIRCRAFT.

       MDC and Customer hereby agree to negotiate in good faith for the purchase
by Customer of used aircraft.

21.    ASSISTANCE WITH ATSSSA LOAN GUARANTEE.

       MDC will assist Customer with its application for a loan guarantee from
the Transportation Stabilization Board. For the sake of clarity, such assistance
does not include concessions relating to any existing or future business
arrangements with Customer.

22.    *

       *

23.    CONFIDENTIAL TREATMENT.

       MDC and Customer agree that this Letter Agreement is confidential and
shall not disclose it or its contents to any third party, except associated
companies, subsidiaries or affiliates of Customer or MDC and their financial and
legal advisors and potential financiers (provided such advisors and financiers
are under

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>

a prior written obligation to keep this Letter Agreement and its terms
confidential), as required by law, the Security Exchange Commission (SEC), or as
required to perform and enforce the terms hereof, without the prior written
consent of the other party, which shall not be unreasonably withheld.

Very truly yours,

MCDONNELL DOUGLAS CORPORATION

By  /s/ Rick Nelson
  ------------------------------------------

Its           Attorney-In-Fact
   --------------------------------------

ACCEPTED AND AGREED TO this

Date:   April 12, 2002
      ----------

MIDWEST EXPRESS AIRLINES, INC.

By  /s/ Timothy E. Hoeksema
  ------------------------------------------

Its  Chairman of the Board, President
     and Chief Executive Officer

MIDWEST EXPRESS AIRLINES, INC.

By  /s/ Timothy E. Hoeksema
  ------------------------------------------

Its  Chairman of the Board, President
     and Chief Executive Officer

<PAGE>

Lease Subsidy Support Payment Table

                                       *

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>

Midwest Express Airlines, Inc.
766 South Howell Avenue
Oak Creek, Wisconsin

Subject:    Aircraft Schedule Reliability Program

Reference:  Purchase Agreement No. 2371 (the Purchase Agreement) between The
            McDonnell Douglas Corporation a wholly-owned subsidiary of The
            Boeing Company (MDC) and Midwest Express Airlines, Inc. (Customer)
            relating to Model 717-2BL aircraft (the Aircraft)

This Letter Agreement amends and supplements the Purchase Agreement. It grants
to Customer an Aircraft Schedule Reliability Program (the Program) described
below. All terms used but not defined in this Letter Agreement have the same
meaning as in the Purchase Agreement.

Definition of Terms:

"Covered Aircraft": Those Aircraft operated by Customer on Customer's routes
during the Program Term.

"Program Term": Five consecutive years commencing on the delivery date of the
first Covered Aircraft.

"Average Flight Frequency" or "Flight Frequency" (Ff): The average daily
Scheduled Revenue Departures per Covered Aircraft during any Analysis Period.

"Interruption Frequency" (If): The average daily Chargeable Schedule
Interruptions per Covered Aircraft during any Analysis Period.

"Analysis Period": Four consecutive months of Scheduled Revenue Departures.

<PAGE>
Page 2

"Chargeable Schedule Interruption" or "Interruption": A cancellation, turn-back,
diverted landing or delayed departure greater than 15 minutes of any scheduled
revenue flight of any Covered Aircraft that results directly from a mechanical
malfunction of such Covered Aircraft, or any system, accessory, equipment or
part (including engines) installed thereon.

"Scheduled Revenue Departure":

       (i) Any departure of such Covered Aircraft for a scheduled revenue flight
segment;

       (ii) Including but not limited to any departure of such Covered Aircraft
for a charter flight, extra section flight; and

       (iii) Any canceled departure of a flight segment. (Normally, Scheduled
Revenue Departures are equal to all actual revenue flight departures plus flight
cancellations.)

"Achieved Mechanical Schedule Reliability":
The achieved mechanical Schedule Reliability shall be calculated by the
following formula (also, see Attachment A):

Achieved Mechanical Schedule Reliability =

   100 X   {1 - Analysis Period Revenue Chargeable Interruptions}        (A)
                ------------------------------------------------
                      {Analysis Period Revenue Flights}

"Excessive Interruptions": The number of Chargeable Interruptions between the
Achieved Mechanical Schedule Reliability and the applicable Schedule Reliability
Target threshold for such Analysis Period.

1.     Program Description.

       Mechanical schedule reliability targets for the Covered Aircraft
(Mechanical Schedule Reliability Target or Target) during the Program Term are
as follows:

       ---------------------------------------- ---------------
                                                   Schedule
                    Program Term                 Reliability
       ---------------------------------------- ---------------
       first year,                                    *
       ---------------------------------------- ---------------
       second year,                                   *
       ---------------------------------------- ---------------
       third through fifth years.                     *
       ---------------------------------------- ---------------

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>
Page 3

These Schedule Reliability Targets are based on an Average Flight Frequency of
5.8 flights per day and an average 1.7 flight hours per departure for the
Covered Aircraft in revenue service operations. The Schedule Reliability Targets
are subject to change based on changes in the Customer's actual Average Flight
Frequency and based on changes in other factors under Customer's control as set
forth in paragraph 5.3.

2.     Remedial Action.

       2.1 The Remedial Action contained in this paragraph will be effective
provided that Customer's Achieved Mechanical Schedule Reliability is (i) lower
than the Schedule Reliability Targets above, and further provided that (ii)
Customer's Achieved Mechanical Schedule Reliability is equal to or greater than
the model 717 fleet wide average for the applicable period less 1%. The
provision (ii) contained in the previous sentence will not apply if it can be
demonstrated that Customers variance from the model 717 fleet wide average is
not due to an anomaly unique to Customers operation.

       2.2 Following the first six months of Scheduled Revenue Departures, if
Customer notifies MDC that the Achieved Mechanical Schedule Reliability for the
Analysis Period is below the applicable Target for such Analysis Periods, MDC
will, without charge:

              2.2.1 Investigate the circumstances and possible causes for
       Excessive Interruptions, and

              2.2.2 Provide technical assistance to Customer in the form of
       analysis and recommendations of a kind and nature which MDC determines to
       be best suited for reducing Excessive Interruptions.

              2.2.3 Initiate a design review of the system, accessory, equipment
       or part (other than engines and engine parts) which are determined by MDC
       to be the primary cause of Excessive Interruptions and, when in MDC's
       judgment a redesign is indicated as a technically and economically
       practical means of reducing such Excessive Interruptions, redesign or
       cause the redesign of such system, accessory, equipment or part, and if
       such redesign results in retrofit kits being offered by MDC or MDC's
       suppliers, provide such kits or cause such kits to be provided, at
       Customer's request, at no charge to Customer. MDC will also reimburse
       Customer's reasonable direct labor costs for incorporation of any such
       kit manufactured to MDC's detailed design. Such reimbursement will be
       provided pursuant to MDC Warranty (Article 11 of Part 2 of Exhibit C,
       Product Assurance Document, of the AGTA), and

              2.2.4 If MDC determines that the primary cause of Excessive
       interruptions is due to the design of engines or engine parts, MDC will,
       if requested by Customer, take whatever reasonable action is permitted
       under

<PAGE>
Page 4

       MDC's contracts with the engine manufacturer or the Customer's warranty
       from the engine manufacturer in an effort to obtain correction of such
       design.

3. Interruption Exclusions An Interruption does not include any cancellation,
turn-back, diverted landing or delayed departure of any scheduled revenue flight
of any Covered Aircraft which is caused by any of the following events:

       (i) Late arrival of an inbound flight;

       (ii) Late return from out-of-service status;

       (iii) Operation, service, maintenance or overhaul of such Covered
Aircraft or any system, accessory, equipment or part (including engines)
installed thereon, in a manner other than in accordance with Customer's approved
instructions and requirements;

       (iv) Logistics problems such as lack of spare parts at stations where
spares could reasonably be expected to be available, as determined in accordance
with industry standard provisioning practices, or inordinate delays in the
availability of spares, unless such delays are caused by MDC, and/or
appropriately trained personnel at any location where any maintenance of the
Covered Aircraft is performed;

       (v) A malfunction caused by impact with a foreign object;

       (vi) Failure to utilize the FAA approved minimum equipment list (MEL) to
defer corrective maintenance, or failure to correct any deferred item within the
time period specified in such MEL;

       (vii) Buyer Furnished Equipment;

       (viii) Tires;

       (ix) Normal brake wear;

       (x) Acts or omissions of Customer and any strikes or labor troubles
causing cessation, slowdown or interruption of work related to the operation or
maintenance of the Covered Aircraft; and

       (xi) Any other cancellation, turn-back, diverted landing or delayed
departure which cannot fairly be attributed to mechanical malfunction of the
Covered Aircraft, or any system, accessory, equipment or part (including
engines) installed on the Covered Aircraft.

       If a Covered Aircraft is used as a substitute for some other aircraft or
some other aircraft is used as a substitute for a Covered Aircraft and the
revenue flight affected by such substitution departs without a cancellation,
turn-back,

<PAGE>
Page 5

diverted landing or delay greater than 15 minutes, then no Chargeable
Schedule Interruption will be deemed to have occurred. If an Interruption occurs
as a result of a malfunction of the substitute aircraft/Covered Aircraft, such
Interruption will be charged against the aircraft/Covered Aircraft initially
scheduled for the flight rather than its substitute. An Interruption, which
affects a subsequent segment or flight for a Covered Aircraft, will count as
only one Interruption. However, an Interruption occurring on such subsequent
segment or flight which is separate from and unrelated to the initial
Interruption will be counted as a new Interruption.

4.     Administrative Requirements

       4.1 Customer will provide status reports every month.

       4.2 The Customer's status reports shall include data used to make the
Achieved and Target Schedule Reliability for each month of the selected period.
That is data used in equation (A). The report shall include the values used to
calculate the four month average. The Customer report shall also include a list
of the chargeable schedule interruptions for the report period.

       4.3 Customer claim reports will include the data described in paragraph
4.2 above and sufficient data to substantiate any claimed Chargeable Schedule
Interruption. Customer will submit to MDC reasonable proof that any claimed
Chargeable Schedule Interruption does in fact constitute a Chargeable Schedule
Interruption. Customer will maintain and submit to MDC such data as may
reasonably be required to:

       (i) determine Achieved Mechanical Schedule Reliability,
       (ii) analyze the problems causing any claimed Chargeable Schedule
Interruption, and
       (iii) when required, develop appropriate remedial action.

       4.4 Failure to file the above status reports within the agreed to period
will constitute an acknowledgment by Customer that the Achieved Mechanical
Schedule Reliability is equal to or greater than the Mechanical Schedule
Reliability Target for such reporting period and MDC will not be obligated to
provide any of the remedies arising under this Program for such reporting
period.

       4.5 All reports submitted to MDC will be addressed to the attention of:

                    Director - Warranty
                    Boeing Commercial Airplane Company
                    P.0. Box 3707
                    Seattle, Washington 98124-2207

5.     Conditions and Limitations.

<PAGE>
Page 6

       5.1 If, to improve schedule reliability, MDC or any MDC supplier issues
service bulletins, service letters or other written instructions (instructions)
or offers no-charge retrofit kits, Customer will accomplish such instructions or
install such kits within a period of 240 days after availability of such
instructions or kits at Customer's facility, or such longer period as may be
established by the parties. If Customer does not comply with the time
requirements of this paragraph, Chargeable Schedule Interruptions relating to
the systems, accessories, equipment or parts affected by such instructions or
kits will be excluded from this Program until such time as Customer notifies MDC
that Customer has incorporated such instructions or kits on all affected
Aircraft.

       5.2 MDC may inspect at all reasonable times Customer's maintenance
facilities and review its maintenance programs and procedures subject to
Customer's prior written approval (which shall not be unreasonable withheld). If
MDC recommends in writing reasonable changes in Customer's maintenance programs
and procedures which would improve the Achieved Mechanical Schedule Reliability,
and Customer does not effect such changes or delays effecting such changes
beyond the period set forth in paragraph 4.1, MDC will have the right to
redefine the Chargeable Schedule Interruption so as to eliminate interruptions
which MDC estimates result from Customer's failure or delay in effecting such
changes.

       5.3 The Targets are based on the Average Flight Frequency for the Covered
Aircraft and certain other maintenance and operational factors under Customer's
control. The Average Flight Frequency applicable to specific target levels is
identified in paragraph 1. If, for any Analysis Period, the actual Average
Flight Frequency or other factors affecting schedule reliability of the Covered
Aircraft change significantly, the Target for such Analysis Period will be
adjusted by the parties to reflect:

              5.3.1 The change in the Average Flight Frequency, by use of the
       "Flight Frequency Adjustment Formulas" as stated in Definitions, and/or

              5.3.2 The change in other factors.

       5.4 At MDC's request, Customer will assign to MDC any of Customer's
rights against any manufacturer of any system, equipment, accessory or part
installed in the Covered Aircraft to the extent reasonably necessary to enable
MDC to fulfill its obligations with respect to any remedy provided by MDC
hereunder.

       5.5 THE DISCLAIMER AND RELEASE and EXCLUSION OF CONSEQUENTIAL AND OTHER
DAMAGES provisions stated in Article 11 of Exhibit C of the AGTA apply to this
Aircraft Schedule Reliability Program.

6.     Confidential Treatment.

<PAGE>
Page 7

       MDC and Customer agree that this Letter Agreement is confidential and
shall not disclose it or its contents to any third party, except associated
companies, subsidiaries or affiliates of Customer or MDC and their financial and
legal advisors and potential financiers (provided such advisors and financiers
are under a prior written obligation to keep this Letter Agreement and its terms
confidential), as required by law, the Security Exchange Commission (SEC), or as
required to perform and enforce the terms hereof, without the prior written
consent of the other party, which shall not be unreasonably withheld.

Very truly yours,

MCDONNELL DOUGLAS CORPORATION

By  /s/ Rick Nelson
  ------------------------------------------

Its           Attorney-In-Fact
   --------------------------------------

ACCEPTED AND AGREED TO this

Date:  September 28, 2001
      -------------

MIDWEST EXPRESS AIRLINES, INC.

By   /s/ Timothy E. Hoeksema
  ------------------------------------------

Its Chairman of the Board, Chief
    Executive Officers and President

<PAGE>
                              Attachment A (Sample)

                      FLIGHT FREQUENCY ADJUSTMENT FORMULAS

Number of Airplane Days calculation.

<TABLE>
<CAPTION>

                                          Airplane Days
------------------------------- ---------------- ---------------- ----------------- -------------- -----------------
                                                                                                    Total
Aircraft Serial No.                                                                                Airplane
& Delivery Date                 October          November         December          January          Days
------------------------------- ---------------- ---------------- ----------------- -------------- -----------------

------------------------------- ---------------- ---------------- ----------------- -------------- -----------------
<S>                               <C>             <C>               <C>              <C>             <C>
WX-10 (10/5)                      26              30                31               31              118
------------------------------- ---------------- ---------------- ----------------- -------------- -----------------

------------------------------- ---------------- ---------------- ----------------- -------------- -----------------
WX-23 (10/17)                     14              30                31               31              106
------------------------------- ---------------- ---------------- ----------------- -------------- -----------------

------------------------------- ---------------- ---------------- ----------------- -------------- -----------------
WX-37 (10/27)                     4               30                31               31              96
------------------------------- ---------------- ---------------- ----------------- -------------- -----------------

------------------------------- ---------------- ---------------- ----------------- -------------- -----------------
WX-44 (11/9)                      0                21               31               31              83
------------------------------- ---------------- ---------------- ----------------- -------------- -----------------

------------------------------- ---------------- ---------------- ----------------- -------------- -----------------
WX-47 (11/21)                     0                9                31               31              71
------------------------------------------------ ------------------------------------------------- -----------------
                                                 Total number of Aircraft days for analysis
                                                 period.                                            474
                                                 ------------------------------------------------- -----------------
</TABLE>

             Sample Calculation:

Assume:
 If = .0677 interruptions per day from Paragraph 1
 Total Revenue Departures = 1469
 Total chargeable interruptions = 13
 Airplane days = 474 from table above

Calculations:
See definition of Achieved Period Revenue Chargeable Interruptions    (A)
Achieved S.R. = 100 X (1- 13/1469) =  99.1%

See definition of Schedule Reliability Target (C)
Ff = 1469/474 = 3.1 departures per day

See definition of Schedule Reliability Target (B)
Target S.R. = 100 X (1 - .0677/3.1) = 97.8%

The achieved Schedule Reliability exceeds the target Schedule Reliability for
the four month period of this analysis.

<PAGE>

Midwest Express Airlines, Inc.
6744 South Howell Avenue
Oak Creek, Wisconsin 53154

Subject:       Non-Excusable Delay Matters

Reference:     Purchase Agreement No. 2371 (the Purchase Agreement) between
               McDonnell Douglas Corporation (MDC) and Midwest Express Airlines,
               Inc. (Customer) relating to Model 717-2BL aircraft (the Aircraft)

This Letter Agreement amends and supplements the Purchase Agreement. All terms
used but not defined in this Letter Agreement have the same meaning as in the
Purchase Agreement.

Definition of Terms:

Non-Excusable Delay: Any delay in delivery of any Aircraft beyond the last day
of the delivery month established in the Purchase Agreement by any cause except
(i) an Excusable Delay pursuant to Article 7 of the AGTA, (ii) a delay caused by
Customer, or (iii) a delay caused by termination of the Model 717 program.

1.     Liquidated Damages

       MDC agrees to pay Customer liquidated damages for each day of
Non-Excusable Delay (collectively the Non-Excusable Delay Payment Period) at a
rate of *. Customer agrees that the total liquidated damages payable by MDC
under this Letter Agreement will not exceed *.

2.     Interest

       In addition to the Liquidated Damages in Paragraph 1, MDC will pay
Customer Interest as follows:

       The product of the daily interest rate (computed by dividing the Interest
       Rate in effect for each day by 365 day, or 366 days, as the case may be)
       times the entire amount of advance payments received from Customer for
       such Aircraft. The Interest Rate will be the *.

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>

       Interest will compound quarterly and is due and payable on the delivery
       date of the respective Aircraft.

3.     Right of Termination.

       Customer will not have the right to refuse to accept delivery of any
Aircraft because of a Non-Excusable Delay unless and until the the Non-Excusable
Delay Payment Period for an Aircraft exceeds *.

4.     Termination

       If the Purchase Agreement is terminated with respect to any Aircraft for
a Non-Excusable Delay, MDC will, in addition to paying Liquidated Damages as
described above, promptly repay to Customer the entire amount of the advance
payments received from Customer with interest as discussed herein for such
Aircraft.

5.     Rescheduled Deliveries

       MDC hereby agrees that if an Aircraft delivery is rescheduled due to
Non-Excusable Delay; then such rescheduling will not result in Customer having
to take delivery of more than one Aircraft per month. This commitment may
require MDC to reschedule another Aircraft ("Bumped Aircraft") to a subsequent
month so that Customer is taking delivery at a rate no faster than one Aircraft
per month. The rescheduling of such Bumped Aircraft will be deemed to be
Excusable Delay and not subject to the liquidated damages contained herein.

6.     Exclusive Remedies

       The Liquidated Damages and Interest payable in accordance with Paragraphs
1 and 2 of this Letter Agreement, and Customer's right to terminate pursuant to
this Letter Agreement are Customer's exclusive remedies for a Non-Excusable
Delay and are in lieu of all other damages, claims, and remedies of Customer
arising at law or otherwise for any Non-Excusable Delay in the Aircraft
delivery. Customer hereby waives and renounces all other claims and remedies
arising at law or otherwise for any such Non-Excusable Delay.

*   Indicates that material has been omitted and confidential treatment has been
    requested therefor. All such omitted material has been filed separately with
    the SEC pursuant to Rule 24b-2.

<PAGE>

7.     Confidential Treatment

       MDC and Customer agree that this Letter Agreement is confidential and
shall not disclose it or its contents to any third party, except associated
companies, subsidiaries or affiliates of Customer or MDC and their financial and
legal advisors and potential financiers (provided such advisors and financiers
are under a prior written obligation to keep this Letter Agreement and its terms
confidential), as required by law, the Security Exchange Commission (SEC), or as
required to perform and enforce the terms herof, without the prior written
consent of the other party, which shall not be unreasonably withheld.

Very truly yours,

MCDONNELL DOUGLAS CORPORATION

By  /s/ Rick Nelson
   ------------------------------------

Its           Attorney-In-Fact
   ------------------------------------

ACCEPTED AND AGREED TO this

Date:   September 28, 2001
      -------------------------------

MIDWEST EXPRESS AIRLINES, INC.

By  /s/ Timothy E. Hoeksema
   ------------------------------------

Its Chairman of the Board, President
    and Chief Executive Officer

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