MESA AIR GROUP INC
10-Q, 1998-08-14
AIR TRANSPORTATION, SCHEDULED
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 10-Q

                QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
                       OF SECURITIES EXCHANGE ACT OF 1934

                  For the quarterly period ended June 30, 1998

                         Commission File Number 0-15495


                              MESA AIR GROUP, INC.
           ----------------------------------------------------------
             (Exact name of registrant as specified in its charter)

<TABLE>
<CAPTION>

<S>                                                                                            <C>

            Nevada                                                                                  85-0302351
- --------------------------------                                                               ----------------------
(State or other jurisdiction of                                                                  (I.R.S. Employer
incorporation or organization)                                                                  Identification No.)


       3753 Howard Hughes Parkway, Suite 200, Las Vegas                                                    89109
- ---------------------------------------------------------------                                        --------------
           (Address of principal executive offices)                                                     (Zip Code)


Registrant's telephone number, including area code:                                                   (702) 892-3773
                                                                                                 --------------------

</TABLE>


Indicate by check mark whether the Registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the Registrant was
required to file such reports) and (2) has been subject to such filing
requirements for the past 90 days.

                                               Yes  X   No
                                                   ---    ---



On July 31, 1998 the Registrant had outstanding 28,362,866 shares of Common
Stock.

<PAGE>   2



PART 1. FINANCIAL INFORMATION

Item 1.

                              MESA AIR GROUP, INC.
                 CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS
                                  (Unaudited)
                    (in thousands, except per share amounts)

<TABLE>
<CAPTION>
                                                            Three Months Ended            Nine Months Ended
                                                                 June 30                      June 30
                                                            1998          1997           1998           1997
                                                          --------      ---------      ---------      ---------
<S>                                                       <C>           <C>            <C>            <C>      
Operating revenues:
     Passenger                                            $ 96,621      $ 126,823      $ 334,456      $ 368,735
     Freight and other                                       2,902          2,620          9,259          7,529
                                                          --------      ---------      ---------      ---------
         Total operating revenues                           99,523        129,443        343,715        376,264
                                                          --------      ---------      ---------      ---------
Operating expenses:
     Flight operations                                      38,283         48,421        134,012        136,104
     Maintenance                                            20,512         23,626         67,043         66,401
     Aircraft and traffic servicing                         14,041         21,305         57,493         63,111
     Promotion and sales                                    14,214         20,066         49,451         55,642
     General and administrative                              6,306          5,682         21,832         18,418
     Depreciation and amortization                           6,205          8,571         20,753         25,596
     Other operating items                                      --             --         40,443             --
                                                          --------      ---------      ---------      ---------
         Total operating expenses                           99,561        127,671        391,027        365,272
                                                          --------      ---------      ---------      ---------
         Operating income (loss)                               (38)         1,772        (47,312)        10,992
                                                          --------      ---------      ---------      ---------
Non-operating income (expense):
     Interest expense                                       (5,190)        (7,025)       (18,233)       (20,618)
     Interest income                                           369            418          1,232          1,463
     Other                                                     498            742          5,091          1,019
                                                          --------      ---------      ---------      ---------
         Total non-operating income (expense)               (4,323)        (5,865)       (11,910)       (18,136)
                                                          --------      ---------      ---------      ---------
         Loss before income taxes                           (4,361)        (4,093)       (59,222)        (7,144)
Income tax benefit                                              --         (1,590)        (2,511)        (2,776)
                                                          --------      ---------      ---------      ---------
         Net loss                                         $ (4,361)     $  (2,503)     $ (56,711)     $  (4,368)
                                                          ========      =========      =========      =========
Average common and common equivalent
 shares outstanding                                         28,350         28,295         28,316         28,269
                                                          ========      =========      =========      =========
Net loss per common and
 common equivalent share                                  $  (0.15)     $   (0.09)     $   (2.00)     $   (0.15)
                                                          ========      =========      =========      =========
</TABLE>


                                       2



<PAGE>   3
                              MESA AIR GROUP, INC.
                     CONDENSED CONSOLIDATED BALANCE SHEETS
                                  (Unaudited)
                                 (in thousands)
<TABLE>
<CAPTION>
                                                                  June 30   September 30
                                                                    1998         1997
                                                                  --------  ------------
<S>                                                               <C>          <C>     
ASSETS
Current Assets:
   Cash and cash equivalents                                      $ 50,416     $ 57,232
   Marketable securities                                                --        8,690
   Receivables, primarily traffic                                   30,226       53,852
   Income tax refund receivable                                      7,523        6,999
   Expendable parts and supplies, net                               34,463       31,377
   Prepaid expenses and other current assets                        11,383        8,553
                                                                  --------     --------
      Total current assets                                         134,011      166,703
Property and equipment, net                                        334,962      440,890
Lease and equipment deposits                                        11,784       10,354
Intangibles, net                                                    20,998       22,071
Other assets                                                         5,467        9,848
                                                                  --------     --------
  Total assets                                                    $507,222     $649,866
                                                                  ========     ========
LIABILITIES AND STOCKHOLDER'S EQUITY

Current liabilities:
  Current portion of long-term debt and capital leases            $ 13,563     $ 31,786
  Accounts payable                                                  27,477       21,884
  Air traffic liability                                             10,595        6,785
  Accrued compensation                                               2,473        7,025
  Other accrued expenses                                            29,599       30,662
                                                                  --------     --------
     Total current liabilities                                      83,707       98,142
Long-term debt and capital leases, excluding current portion       245,857      338,199
Deferred credits and other liabilities                              59,847       34,837
Deferred income taxes                                                   --        1,600
Stockholder's equity:
  Preferred stock of no par value, 2,000,000 shares                     --           --
    authorized; no shares issued and outstanding
  Common stock of no par value, 75,000,000 shares authorized;      101,836      101,361
    28,362,249 and 28,294,584 shares issued and outstanding
  Retained earnings                                                 15,975       72,686
  Unrealized gain on marketable securities, net                         --        3,041
                                                                  --------     --------
     Total stockholder's equity                                    117,811      177,088
                                                                  --------     --------
Total liabilities and stockholder's equity                        $507,222     $649,866
                                                                  ========     ========
</TABLE>


                                       3




<PAGE>   4
                              MESA AIR GROUP, INC.
                CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (Unaudited)
                                 (in thousands)
                           Nine Months Ended June 30

<TABLE>
<CAPTION>
                                                         1998        1997
                                                       --------    --------
<S>                                                    <C>         <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss                                               $(56,711)   $ (4,368)
Adjustments to reconcile net loss to
  net cash flows from operating activities:
   Depreciation and amortization                         20,753      25,596
   Provision for other operating items                   40,443        --
   Amortization and write-off of deferred credits       (15,433)     (1,296)
   Stock bonus plan                                        --           349
   Provision for doubtful accounts                        1,027        --
   Gain on sale of securities                            (4,544)       --
   Other                                                  2,759        --
   Changes in assets and liabilities:
     Receivables                                         22,599     (10,018)
     Expendable parts and supplies                       (3,086)     (2,369)
     Prepaid expenses and other current assets           (2,830)     (4,059)
     Accounts payable                                     5,594       5,408
     Other accrued liabilities                           (5,615)     (7,537)
                                                       --------    --------
       NET CASH FLOWS FROM OPERATING ACTIVITIES:          4,956       1,706
                                                       --------    --------

CASH FLOWS FROM INVESTING ACTIVITIES:
  Capital retirements                                    (6,443)     (5,498)
  Proceeds from sale of property and equipment           17,624       1,803
  Proceeds from sale of marketable securities            11,102       1,000
  Other assets                                           (1,292)      4,811
  Lease and equipment deposits                           (1,430)       (888)
                                                       --------    --------
       NET CASH FLOWS FROM INVESTING ACTIVITIES:         19,561       1,228
                                                       --------    --------
CASH FLOWS FROM FINANCING ACTIVITIES:
Principal payments on long-term debt and obligations
  under capital leases                                  (31,808)    (13,050)
Proceeds from issuance of common stock                      475         122
Proceeds from deferred credits                               --         230
                                                       --------    --------
       NET CASH FLOWS FROM FINANCING ACTIVITIES:        (31,333)    (12,698)
                                                       --------    --------
       NET CHANGE IN CASH AND CASH EQUIVALENTS:          (6,816)     (9,764)

CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD         57,232      54,720
                                                       --------    --------

CASH AND CASH EQUIVALENTS AT END OF PERIOD             $ 50,416    $ 44,956
                                                       ========    ========
</TABLE>


                                       4


<PAGE>   5

<TABLE>
<CAPTION>


                                                                                    1998                1997
                                                                             ------------------- --------------------
<S>                                                                          <C>                 <C>            
Cash paid during the period for:
    Interest                                                                 $        18,233     $        20,618
    Income taxes                                                                         ___               1,286



                                     

</TABLE>


Mesa did not purchase any property or equipment upon which debt was assumed
during the nine-month period ended June 30, 1998. Mesa purchased property and
equipment totaling approximately $37.0 million upon which debt of approximately
$35.9 million was assumed in the nine-month period ended June 30, 1997. During
the three month period ended June 30, 1998, Mesa sold 22 aircraft for $78.7
million which was debt assumed by the acquirer.




                                       5

<PAGE>   6



              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS


1.    The accompanying unaudited condensed consolidated financial statements
      have been prepared in accordance with generally accepted accounting
      principles for interim financial information and with the instructions to
      Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not
      include all of the information and footnotes required by generally
      accepted accounting principles for complete financial statements. In the
      opinion of management, all adjustments (consisting of normal recurring
      accruals) considered necessary for a fair presentation have been included.
      Operating results for the three-month and nine-month periods ended June
      30, 1998 are not necessarily indicative of the results that may be
      expected for the year ending September 30, 1998.

      These condensed consolidated financial statements should be read in
      conjunction with the Company's consolidated financial statements and
      footnotes included in the annual report for the year ended September 30,
      1997.

2.    The condensed consolidated financial statements include the accounts of
      Mesa Air Group, Inc. and its wholly owned subsidiaries Mesa Airlines,
      Inc., WestAir Holding, Inc., Air Midwest, Inc., Mesa Leasing, Inc., MAGI
      Insurance, Ltd., MPD, Inc., and FCA, Inc. All significant intercompany
      balances and transactions have been eliminated in consolidation. See
      discussion of WestAir Holding, Inc. in the "Liquidity and Capital
      Resources" section of this report.

3.    Income tax benefit in the nine-month period ended June 30, 1998 has been
      recognized only to the extent of previously recorded deferred tax
      liability.

4.    Legal Proceedings:

      See, "Part II., Item 1."




                                       6

<PAGE>   7



Item 2.

                              MESA AIR GROUP, INC.

                      MANAGEMENT'S DISCUSSION AND ANALYSIS
                OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS


GENERAL

Mesa Air Group, Inc. and its subsidiaries (collectively referred to herein as
"Mesa" or the "Company") is a regional airline operating as America West
Express, Mesa Airlines, US Airways Express and, through May 31, 1998, United
Express (see, "Other Events--United Airlines") serving 113 cities in 29 states,
Canada and the District of Columbia. At June 30, 1998, Mesa utilized a fleet of
107 aircraft with approximately 1,000 daily departures.

Mesa's long-term strategy is to profitably service routes not directly served by
major air carriers and to supplement service of major carrier code partners on
certain routes. The Company evaluates market demand and utilizes its fleet of
aircraft to meet that demand. Code-sharing agreements with certain of the major
air carriers provide benefits from the name recognition, reservation systems,
marketing and promotional efforts of those carriers. Mesa operates a fleet of
new and efficient aircraft and performs much of its own maintenance and overhaul
work.

Historically, the Company has relied on generating much of its revenues by use
of a "through fare" arrangement with its major code-sharing partners. A "through
fare" is a combined fare offered to passengers who connect to Mesa from a major
code-sharing partner and vice versa. Mesa is paid a pro rata portion of the
"through fare." As an alternative to the pro rate arrangements, the Company, in
certain markets, has utilized fee per departure arrangements. A fee per
departure arrangement allows the Company to obtain a fee based on a proprietary
formula for each flight operated. The Company seeks to obtain fee per departure
arrangements in those markets where it deems the arrangement more favorable than
a pro rate agreement.

The following tables set forth year-to-year comparisons for the periods
indicated below:

                                 OPERATING DATA
                                 --------------

<TABLE>
<CAPTION>

                                                  Three Months Ended                    Nine Months Ended
                                                       June 30                               June 30
                                               1998               1997               1998               1997
                                         ------------------ ------------------ ------------------ ------------------

<S>                                           <C>                <C>                <C>                <C>      
Passengers                                    1,199,004          1,748,216          4,242,013          4,866,198
Available seat miles (000)                      530,652            642,527          1,793,078          1,832,185
Revenue passenger miles (000)                   303,238            359,644            984,364          1,015,334
Load factor                                       57.1%              56.0%              54.9%              55.4%
Yield per revenue passenger mile                  31.9(cent)         35.3(cent)         34.0(cent)         36.3(cent)
Revenue per available seat mile                   18.8(cent)         20.1(cent)         19.2(cent)         20.5(cent)
Operating cost per available seat mile            18.8(cent)         19.9(cent)         21.8(cent)         19.9(cent)
Average stage length (miles)                        194                170                184                170
Number of aircraft in fleet                         132                186                132                186
</TABLE>



                                       7

<PAGE>   8

<TABLE>
<CAPTION>

                                                  Three Months Ended                    Nine Months Ended            
                                                       June 30                               June 30                 
                                               1998               1997               1998               1997         
                                         ------------------ ------------------ ------------------ ------------------ 
                                         


<S>                                           <C>                <C>                <C>                <C>   
Gallons of fuel consumed (000)                   15,539             19,299             53,135             55,956
Block hours flown                               104,369            147,747            376,799            424,370
Departures                                      104,739            156,473            378,006            450,940


</TABLE>

                                 FINANCIAL DATA
                                 --------------

Three Months Ended June 30, 1998 Versus Three Months Ended June 30, 1997
- ------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                               Three Months Ended June 30
                                                               --------------------------
                                                      1998                                     1997
                                       ----------------------------------       ----------------------------------
                                         Cost per       Percent of total          Cost per       Percent of total
                                           ASM         operating revenues           ASM         operating revenues
                                       -----------     ------------------       -----------     ------------------

 
<S>                                             <C>                  <C>                 <C>                  <C>  
Flight operations                       7.2(cent)            38.5%               7.6(cent)            37.4%
Maintenance                             3.9(cent)            20.6%               3.7(cent)            18.2%
Aircraft and traffic servicing          2.6(cent)            14.2%               3.3(cent)            16.5%
Promotion and sales                     2.7(cent)            14.3%               3.1(cent)            15.5%
General and administrative              1.2(cent)             6.4%               0.9(cent)             4.4%
Depreciation and amortization           1.2(cent)             6.2%               1.3(cent)             6.6%
Other operating items                   0.0(cent)             0.0%               0.0(cent)             0.0%
                                       ---------        ---------             ---------          ---------
Total operating expenses               18.8(cent)           100.0%              19.9(cent)            98.8%
Interest expense                        1.0(cent)             5.2%               1.1(cent)             5.4%


</TABLE>


Nine Months Ended June 30, 1998 Versus Nine Months Ended June 30, 1997
- ----------------------------------------------------------------------
<TABLE>
<CAPTION>


                                                                Nine Months Ended June 30
                                                                -------------------------
                                                      1998                                     1997
                                        ---------------------------------        ---------------------------------
                                         Cost per       Percent of total          Cost per       Percent of total
                                           ASM         operating revenues           ASM         operating revenues
                                        -----------    ------------------        ----------     ------------------


<S>                                       <C>                  <C>                 <C>                  <C>  
Flight operations                         7.5(cent)            39.0%               7.4(cent)            36.2%
Maintenance                               3.7(cent)            19.5%               3.6(cent)            17.6%
Aircraft and traffic servicing            3.2(cent)            16.7%               3.5(cent)            16.8%
Promotion and sales                       2.7(cent)            14.4%               3.0(cent)            14.8%
General and administrative                1.2(cent)             6.4%               1.0(cent)             4.9%
Depreciation and amortization             1.2(cent)             6.0%               1.4(cent)             6.8%
Other operating items                     2.3(cent)            11.7%               0.0(cent)             0.0%
                                         ---------        ---------             ------------       ---------
Total operating expenses                 21.8(cent)           113.8%              19.9(cent)            97.1%
Interest expense                          1.0(cent)             5.2%               1.1(cent)             5.5%

</TABLE>



                                       8

<PAGE>   9


OPERATIONS

Operating Revenues:

Operating revenues decreased by $29.9 million to $99.5 million in the quarter
ended June 30, 1998 from $129.4 million in the quarter ended June 30, 1997. The
revenue decrease was primarily due to a 31.4 % decrease in passengers carried.
Available seat miles ("ASMs") decreased by 17.4 %, and the load factor increased
from 56.0% during the June 30, 1997 quarter to 57.1% for the current quarter.
The primary reason for the decrease in ASM's was the discontinuation of the
Company's United Airlines Express ("United") operations. (See Other Events-
United Operations.)

Operating revenues decreased by $32.5 million to $343.7 million for the
nine-month period ended June 30, 1998 from $376.3 million for the nine-month
period ended June 30, 1997. This decrease was primarily due to the decrease in
the number of passengers carried in this period as compared to the nine months
ended June 30, 1997 as explained above, including the cessation of the United
Express operations and independent jet operations in Ft. Worth, Texas. The
independent jet operation was discontinued in February 1998 (See "Other
Events--Independent Jet Operation").

Operating Expenses:

Flight Operations:
- -----------------

Flight operations costs decreased by $10.1million to $38.3 million for the
quarter ended June 30, 1998 from the quarter ended June 30, 1997 and decreased
by $2.1 million to $134.0 million for the nine-month period ended June 30, 1998
from the nine-month period ended June 30, 1997. The primary cause of the
decrease for the quarter ended June 30, 1998 from the prior year's comparable
quarter was the reduction in ASM's previously noted. Flight operations expense
on a cost per ASM basis decreased to 7.2(cent) per seat mile for the quarter
ended June 30, 1998 from 7.6(cent) for the quarter ended June 30, 1997 due to
lower fuel costs. For the nine months ended June 30, 1998, the increase in cost
per ASM over the nine-month period ended June 30, 1997 were caused by a $3.4
million increase in pilot salaries, a $5.7 million increase in lease costs for
deployment of the CRJ aircraft into the Company's fleet, and a $2.9 million
increase in pilot training and lodging, all of which was partially offset by a
decrease in fuel costs of $2.8 million.

Maintenance Expense:
- -------------------

Maintenance expense decreased by $3.1million in the quarter ended June 30, 1998
to $20.5 million from $23.6 million in the same quarter of the previous fiscal
year and increased by $.6 million in the nine-month period ended June 30, 1998
to $67.0 million from $66.4 million for the nine-month period ended June 30,
1997. The decrease for the quarter ended June 30, 1998 was due to the reduction
in ASM's partially offset by maintenance of a greater number of CRJ aircraft for
the period from the prior year and higher costs of operating under increased
regulatory oversight as a Part 121 carrier. The increase for the nine-month
period ended June 30, 1998 was primarily due to a provision of $1.1 million in
uncollectible warranty and insurance claims, a $0.5 million increase as a result
of the higher cost of operating under greater regulatory oversight, and
maintenance of a greater number of CRJ aircraft.

Aircraft and Traffic Service Expense:
- ------------------------------------

Aircraft and traffic service expense decreased by $7.3 million to $14.0 million
during the quarter ended June 30, 1998 from $21.3 million in the comparable
quarter of the previous fiscal year. Aircraft and traffic service expense
decreased by $5.6 million to $57.5 million for the nine-month period ended June
30, 1998 from $63.1 million for the nine-month period ended June 30, 1997. The
decrease for the 


                                       9

<PAGE>   10

quarter ended June 30, 1998 was primarily due to reduced ASM's
and additional rent and landing fee reductions due to the closure of the
Company's United Express operations in Denver, which has some of the highest
rents and landing fees in the Company's system. The decrease for the nine-month
period ended June 30, 1998 was due to reduced ASM's, partially offset by
increased charges for reaccommodation and lost baggage costs from flight
cancellations caused by crew scheduling difficulties and training delays.

Promotion and Sales:
- -------------------

Promotion and sales expense decreased $6.0 million to $14.2 million for the
quarter ended June 30, 1998 and decreased by $6.2 million to $49.5 million for
the nine-month period ended June 30, 1998 over the three-month and nine-month
periods ended June 30, 1997, respectively. The primary reason for these
decreases was a significant decline in the number of passengers carried and a
reduction in commissions paid to travel agents, as a result of fewer passengers
and a lower commission rate.

General and Administrative Expense:
- ---------------------------------

General and administrative expense increased by $.6 million for the three-month
period ended June 30, 1998 to $6.3 million as compared to the quarter ended June
30, 1997 and increased by $3.4 million to $21.8 million for the nine-month
period ended June 30, 1998 as compared to the nine-month period ended June 30,
1997. The primary causes of the increase for the quarter ended June 30, 1998
were $0.4 million increase in health insurance claims, and $0.2 million increase
in property and casualty insurance. The primary causes of the increase for the
nine-month period ended June 30, 1998 was a $0.6 million increase in amounts
paid to employees as part of the employee performance bonus plan, a $1.3 million
increase in the amount of health insurance claims paid during the period, a $0.6
million increase in property taxes, and a $0.3 million increase in property and
casualty insurance.

Depreciation, Amortization and Interest Expense:
- -----------------------------------------------

Depreciation and amortization decreased by $2.4 million to $6.2 million for the
quarter ended June 30, 1998 as compared to the quarter ended June 30, 1997 and
by $4.8 million to $20.8 million for the nine-month period ended June 30, 1998
from the comparable periods in the prior year. The primary reason for these
decreases in depreciation and amortization was the writedown of the Denver
system intangible assets as of September 30, 1997. Interest expense declined by
$1.8 million to $5.2 million during the quarter ended June 30, 1998 from $7.0
million during the similar period in the prior fiscal year and by $2.4 million
to $18.2 million for the nine-month period ended June 30, 1998 from the
comparable period in the prior year. The decrease was due to lower outstanding
principal loan balances as a result of the retirement of aircraft.

Other Operating Items:
- ---------------------

During the nine-months ended June 30, 1998, the Company recognized a $4.0
million loss provision related to the discontinuation of its independent jet
operations in Ft. Worth, Texas. The Company also recognized a $2.5 million loss
provision related to anticipated settlement costs of a shareholder class action
lawsuit. See, Part II, Item 1. "Legal Proceedings." The Company also recognized
a $33.9 million loss provision related to the discontinuation of service under
the Mesa Airlines, Inc. ("MAI") code-sharing agreement with United Airlines,
Inc. ("UAL"). See, "Other Events--United Airlines."

Other Non-Operating Income:
- --------------------------



                                       10
<PAGE>   11

In January 1998, Mesa sold its remaining investment in America West Airlines,
Inc. ("AWA") comprised of 100,000 Class A shares, 200,000 Class B shares and
warrants to purchase approximately 800,000 Class B shares. Mesa received cash of
approximately $11.1 million and recognized non-operating income of approximately
$4.5 million on the sale of these securities.


LIQUIDITY AND CAPITAL RESOURCES

The Company's cash balance of $50.4 million at June 30, 1998 included $2.4
million of cash restricted for the issuance of letters of credit, and $11.5
million held by WestAir Commuter Airlines, Inc. ("WestAir").

Mesa had receivables of $30.2 million at June 30, 1998 which consisted primarily
of amounts due from code-sharing partner US Airways, Inc. ("US Airways"). Under
the terms of the US Airways code-sharing agreement, Mesa receives a substantial
portion of its revenues through the Airline Clearing House. Historically, the
Company has enjoyed cash flow sufficient to meet its needs. However, UAL has
terminated all of its code-sharing agreements with the Company. Such action
could have a material negative impact on the financial position and cash flow of
the Company, particularly if the Company cannot re-deploy its United Express
aircraft on other operating routes, or alternatively, sell the aircraft or
return them to the lessors. Management's belief that the Company will have
adequate cash flow to meet its operating needs is a forward-looking statement.
The Company may have less cash flow than anticipated in the event of a
substantial decrease in the number of routes allocated to MAI under its
code-sharing agreements with US Airways and America West Airlines, failure to
sell, dispose of, or redeploy its assets associated with United Express
operations in a timely manner, reduced levels of passenger revenue, additional
taxes or costs of compliance with governmental regulations, fuel cost increases,
increase in competition, increase in interest rates, general economic conditions
and unfavorable settlement of existing or potential litigation.

On March 1, 1998, the Company's $20 million secured line of credit expired under
its terms and the bank declined to renew it. The Company has been approved by
another financial institutions to provide a secured $20 million line of credit.
There is presently no balance outstanding under this line of credit.

As of June 30, 1998, Mesa was not in compliance with some of the secured debt
covenants required by a bank credit agreement; however, the bank has waived
compliance with such covenants. The Company believes it will either maintain
compliance or obtain waivers of compliance with its present debt covenants
through September 30, 1998. Management's belief that it will maintain compliance
with its present debt covenants is a forward-looking statement. Compliance may
be adversely impacted in the event of the termination or renegotiation of one or
more code-sharing agreements, a substantial decrease in the number of routes
allocated to MAI under its code-sharing agreements with US Airways, failure to
dispose of or redeploy assets associated with its United Express operations,
reduced levels of passenger revenue, additional taxes or costs of compliance
with governmental regulations, fuel cost increases, increase in competition,
increase in interest rates, general economic conditions and settlement of
existing or potential litigation.

At June 30, 1998, the Company had aggregate indebtedness of approximately $259.4
million payable to various parties under promissory notes issued in connection
with the purchase of aircraft. The notes have interest rates ranging from 6.66%
to 7.87% with maturities through December 2011. In addition, the Company has
significant lease obligations on other operating and non-operating aircraft.
These leases are classified as operating leases and therefore are not reflected
as liabilities in the accompanying balance sheet. At June 30, 1998, 67 aircraft
were leased by the Company with terms extending through



                                       11

<PAGE>   12

June 2016. Total lease expense for the nine-month period ended June 30, 1998
amounted to $31.8 million.

Mesa has ordered 32 CRJ aircraft for use in its AmericaWest Express operation in
Phoenix, Arizona, as USAirways Express on the East Coast and in other markets
that management believes have the potential for profitable operations. As of
June 30, 1998, the Company had received sixteen of the 32 CRJ aircraft on order
and expects to take delivery of the remaining 16 aircraft by the end of 1999.
The Company has options for an additional 16 CRJ aircraft with a delivery
schedule of one per month beginning June 2000. The value of these 32 CRJ
aircraft is approximately $640 million. The expected delivery schedule of
aircraft is a forward-looking statement which could significantly differ based
on manufacturer's delivery delays, among other factors.

The Company's wholly owned subsidiary, WestAir Holding, Inc. ("WHI"), owns
WestAir Commuter Airlines, Inc. ("WestAir"), a certificated air carrier and
Regional Aircraft Services, Inc. ("RAS"), an aircraft equipment repair service
company. WestAir had a total of 22 Embraer Brasilia aircraft leased from various
lessors along with the 21 Jetstreams which are currently parked and not being
utilized in WestAir's operations. WestAir made lease payments for all 43
aircraft only through May 31, 1998, the expiration date of WestAir's
code-sharing agreement with UAL. Failure to make lease payments constituted a
default under the lease agreements. The aircraft lessors have the right to
exercise liens each lessor has on particular aircraft.

If the aircraft provide insufficient collateral for the remaining lease
payments, it is the belief of management that while the various lessors may seek
recovery of any deficiency from WestAir (or WHI, as the various lease contracts
permit) that they will have no right to seek any recovery of deficiencies from
Mesa Air Group, Inc. Management's belief that the various aircraft lessors will
have no right of recovery against Mesa Air Group, Inc. itself is a
forward-looking statement which could materially differ based on the
interpretation of lease agreements and other documents entered into between
WestAir and/or WHI and the lessors by a court or an arbitrator, as the case may
be.

WestAir's operations are being liquidated due to the expiration of the UAL
code-sharing agreement. The remaining assets and liabilities of WHI and its
subsidiaries are included in the consolidated financial statements of Mesa Air
Group, Inc. as of June 30, 1998. It is unlikely that any assets of WestAir will
remain for distribution to WHI and, ultimately, Mesa Air Group, Inc.

Management of the Company recognizes the need to ensure its operations will not
be adversely impacted by Year 2000 software failure and that the Company's
computer systems and applications must function properly beyond 1999. The
Company is conducting the analysis necessary to determine the potential Year
2000 risk and until completion of such analysis will not know the cost to the
Company of potential Year 2000 software failure. Although the Company cannot
presently estimate the costs associated with Year 2000 software failure, such
costs will be expensed as incurred.

The Company recognizes that its business is reliant upon the systems and
applications of third parties and will conduct an assessment of the potential
risks. However, there can be no assurance that the systems and applications of
other parties upon which the Company's business relies will be converted on a
timely basis. The Company's business, financial condition, or results of
operations could be materially adversely affected by the failure of its systems
and applications or the failure of those systems operated by other parties to
properly operate or manage dates beyond 1999.




                                       12

<PAGE>   13

OTHER EVENTS

United Airlines, Inc.

As a result of termination by UAL of the West Air and MAI Code-Sharing
Agreements on April 22 and May 31, 1998 respectively, the Company incurred a
loss provision totaling $106 million to provide for costs to dispose of certain
aircraft, equipment, and other costs to shut down the entire United Express
system. Should the Company fail to locate purchasers for its excess Beechcraft
1900D aircraft or redeploy its Dash 8-200 aircraft utilized in the MAI United
Express system in a timely manner, the $106 million loss provision may be
inadequate and subject to a material increase. The Company anticipates flying
the Dash 8-200 aircraft under an agreement with AWA (see America West Airlines,
Inc. discussion). Management of the Company believes that it will incur
approximately $15 to $20 million of net cash expenditures during the 12-month
period subsequent to May 31, 1998 as a result of the termination of its MAI and
WestAir code-sharing agreements. WestAir spent approximately $1.7 million in the
period from June 1, 1998 through July 31, 1998 on wind down activities. The
estimated net cash expenditure is a forward-looking statement which could
materially change as a result of the ultimate cost to park the WestAir fleet, or
the failure to sell or dispose of excess aircraft in a timely manner.

US Airways, Inc.

Mesa has entered into a marketing agreement with US Airways in which it will
initially operate 12 CRJ aircraft in its USAirways Express operation. The
Company began USAirways Express CRJ service on January 19, 1998, with flights
between Philadelphia, Pennsylvania and Birmingham, Alabama; St. Louis, Missouri;
Cincinnati, Ohio; and Newburgh, New York. Other cities to be served include
Charlotte, North Carolina; Washington, D.C.; Toronto, Canada; Little Rock,
Arkansas; Charleston, West Virginia; Raleigh Durham, North Carolina; Boston,
Massachusetts; Milwaukee, Wisconsin; White Plains, New York; and Tallahassee,
Florida. All of this service is to be provided pursuant to a fee per departure
arrangement. There are 12 CRJ aircraft operating in the US Airways Express
system as of August 1, 1998.

America West Airlines, Inc.

The terms of the Company's code-sharing agreement with AWA provide for a minimum
controllable flight completion factor for any consecutive two-month period.
Primarily as a result of flight crew shortages in December 1997 and January
1998, MAI's controllable flight completion factor fell below the minimum and AWA
issued the Company a notice of termination. In early February 1998, MAI resolved
its crew shortages with AWA and its controllable completion factor exceeded the
minimum requirement in February 1998 through April 1998. Subsequent to the
termination by AWA of the code-sharing agreement, AWA and Mesa entered into an
interim agreement to continue Mesa operations as America West Express through
September 10, 1998.

The Company entered into a new six-year agreement with AWA to provide expanded
regional airline service as America West Express. The new agreement calls for
the addition of eleven 37-passenger turboprop aircraft and ten regional jets by
the end of 1999, with options to continue to expand both fleets in the year 2000
and 2001. This will more than double the size of the America West operation over
the next twelve months. The Company will be compensated for these markets under
a modified fee per departure arrangement.



                                       13
<PAGE>   14

The following table lists the aircraft owned and leased by Mesa for scheduled
operations as of June 30, 1998:

<TABLE>
<CAPTION>

                                                 NUMBER OF AIRCRAFT
                                                                                             Passenger
                              ---------------------------------------------------------
 Type of Aircraft                Owned         Leased          Total         Operating       Capacity
                                                                            On June 30,
                                                                               1998
                              ------------- -------------- --------------- -------------- ---------------
<S>                                 <C>          <C>               <C>          <C>             <C>
 Beechcraft 1900                    86           10                96           80              19
 Embraer Brasilia                   --            8                 8            4              30
 Dash 8-200                         --           12                12            7              37
 CRJ                                --           16                16           16              50
                              ------------- -------------- --------------- --------------
 Total                              86           46               132          107
                              ------------- -------------- --------------- --------------
</TABLE>


PART II.      OTHER INFORMATION

Item 1.       Legal Proceedings

              During 1994, seven shareholder class action complaints were filed
              in the United States District Court for the District of New Mexico
              against Mesa, certain of its present and former corporate officers
              and directors, its independent auditor, and certain underwriters
              who participated in Mesa's June 1993 public offering of Common
              Stock. During October 1995, the court certified a class consisting
              of persons who purchased Mesa stock between January 28, 1993 and
              August 5, 1994. These complaints were consolidated by court order,
              and, after the court granted in part a motion to dismiss in May
              1996, a third amended consolidated complaint was filed alleging
              that during the class period the defendants caused or permitted
              Mesa to issue publicly misleading financial statements and other
              misleading statements in the registration statement for the June
              1993 public offering, annual and quarterly reports to
              shareholders, press releases and interviews with securities
              analysts.

              In May 1998, the Company entered into a memorandum of
              understanding with the plaintiffs to settle the litigation. While
              the Company and its corporate officers and directors believe they
              have substantial and meritorious defenses against the plaintiff's
              allegations and have defended their position vigorously, they have
              agreed to a settlement to avoid ongoing litigation. The memorandum
              of understanding provides for a total of $8 million to be paid to
              the class plaintiffs on behalf of the defendants. The Company will
              pay a substantial portion of this settlement. The settlement still
              must be approved by the Court following notification of the Class.
              The Company intends to utilize funds reserved for the defense of
              the case as its contribution towards the settlement.

              In June 1997, UAL filed a complaint in the United States District
              Court for the Northern District of Illinois against two
              subsidiaries of the Company, Mesa Airlines, Inc. ("MAI") and
              WestAir, seeking a judicial declaration of the parties' rights and
              obligations under two separate written agreements, pursuant to
              which MAI and WestAir allegedly agreed to provide certain airline
              transportation services to UAL including the provision of
              scheduled air transportation services in certain areas of the
              United States under the service mark "United Express." UAL
              contends that, under these agreements, UAL has the right to



                                       14

<PAGE>   15
              "increase, decrease, or in any other way adjust the flight 
              frequencies, or markets, or both" in certain airports currently
              serviced by WestAir and/or MAI. In January 1998, UAL amended its
              complaint to include damages related to MAI's purported breach of
              contract to provide specified levels of service in certain
              cities. MAI and WestAir dispute the principal contentions in
              UAL's complaint, and unless a satisfactory negotiated resolution
              is achieved, intend to defend their position vigorously.
              Furthermore, MAI and WestAir believe that UAL has breached its
              code-sharing agreements with the respective entities and have
              filed a counterclaim seeking to recover the substantial damages
              to the business of MAI and WestAir which have been incurred.

              In addition, Mesa and WestAir have counter claimed against UAL 
              and SkyWest Airlines. SkyWest was contracted to be Mesa's
              successor on the West Coast. The complaint alleges that SkyWest
              unlawfully interfered with Mesa's and WestAir's contracts with
              UAL. It further alleges improper conduct on the part of UAL and
              SkyWest in terminating markets under the Mesa agreement and in
              leading to the non-renewal of the WestAir agreement. The Company
              is seeking substantial damages against each defendant.

              In July 1998, Jet Acceptance Corporation ("Jet Acceptance") filed
              suit against Mesa and WestAir in the United States District Court
              for the Northern District of California. The suit seeks damages
              from WestAir for non-payment of leases for Jetstream 31 aircraft
              leased by WestAir and also claims damages against Mesa for
              alleged fraudulent conveyances and the receipt of illegal
              dividends. Jet Acceptance claims damages in the amount of
              approximately $16.5 million. Jet Acceptance seeks to hold Mesa
              liable for the WestAir leases on an "alter ego" or "piercing the
              corporate veil" theory. Mesa denies the allegations. Jet
              Acceptance has applied for and received a court-ordered
              attachment of WestAir's assets. The Company intends to vigorously
              defend this suit.

              Mesa is also a party to legal proceedings and claims which arise
              during the ordinary course of business.

              In the belief of management, based upon information at this time,
              the ultimate outcome of all the proceedings and claims pending
              against Mesa other than those with UAL and Jet Acceptance
              referred to above is not expected to have a material adverse
              effect on Mesa's consolidated financial position. It is too early
              to determine the impact on Mesa's financial position of the
              litigation with UAL and Jet Acceptance.

              The belief that UAL has breached its code-sharing agreements with
              MAI and WestAir and the belief that the ultimate outcome of
              certain of the proceedings and claims pending against Mesa will
              favorably be resolved are forward-looking statements which could
              materially differ as a result of the determination of a judge or
              jury.

Item 5.       The Company expects to hold its next annual meeting in March 1999.
              Shareholder proposals to be included in the Company's proxy
              materials and form of proxy must be received by the Company no
              later than September 30, 1998. To be included, proposals must be
              proper under law and comply with the rules and regulations of the
              U.S. Securities and Exchange Commission. Shareholders desiring to
              present proposals at the 1999 annual meeting that are




                                       15

<PAGE>   16

              not to be included in the Company's proxy materials and form of
              proxy must provide the Company with notice no later than December
              1, 1998.

Item 6.       Exhibits and Reports on Form 8-K

(A)    Documents filed as part of this report:

       1. Reference is made to consolidated financial statement schedules in
          item 8 hereof.

       2. Reports on Form 8-K

          None

       3. Exhibits

          Please see the attached Exhibit Index for a list of the exhibits that
          are either filed as part of this report or are incorporated herein by
          reference from documents previously filed with the Securities and
          Exchange Commission.
<PAGE>   17


                                   SIGNATURES

Pursuant to the requirements of the Securities and Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the duly
authorized undersigned.



                                                 MESA AIR GROUP, INC.
                                                 Registrant


Date:  August 14, 1998                           /s/ Blaine M. Jones
                                                 -----------------------
                                                 Blaine M. Jones
                                                 Chief Financial Officer
                                                 (Principal Accounting Officer)



                                       22

<PAGE>   18


                               INDEX TO EXHIBITS

<TABLE>
<CAPTION>

    EXHIBIT
    NUMBER        DESCRIPTION                                      REFERENCE
    ------        -----------                                      ---------
    <S>          <C>                                               <C>


      2.1         Plan and Agreement of Merger of Mesa Air         Filed as Exhibit 2.1 to Registrant's Form 10-K
                  Group, Inc. into Mesa Holding, Inc. dated        for the fiscal year ended September 30, 1996,
                  September 16, 1996                               incorporated herein by reference

      3.1         Articles of Incorporation of Mesa Air            Filed as Exhibit 3.1 to
                  Inc. dated May 28, 1996                          Registrant's Form 10-K Holdings, for
                                                                   the fiscal year ended September 30, 1996,
                                                                   incorporated herein by reference

      3.2         Bylaws of Mesa Air Group, Inc., as amended       Filed as Exhibit 3.2 to Registrant's Form 10-K
                                                                   for the fiscal year ended September 30, 1996,
                                                                   incorporated herein by reference

      4.1         Form of Common Stock certificate                 Filed as Exhibit 4.5 to Amendment No. 1 to
                                                                   Registrant's Form S-18, Registration No.
                                                                   33-11765 filed March 6, 1987, incorporated
                                                                   herein by reference

      4.2         Form of Common Stock certificate (issued         Filed as Exhibit 4.8 to Form S-1, Registration
                  after November 12, 1990)                         No. 33-35556 effective December 6, 1990,
                                                                   incorporated herein by reference

      4.8         Form of Employee Non-Incentive Stock Option      Filed as Exhibit 4.12 to Registrant's Form 10-K Plan, 
                  dated as of June 2, 1992                         for the fiscal year ended September 30, 1992,
                                                                   Commission File No. 33-15495, incorporated
                                                                   herein by reference

      4.9         Form of Non-Incentive Stock Option issued        Filed as Exhibit 4.13 to Registrant's Form 10-K for 
                  under Mesa Airlines, Inc. Employee Non-          the fiscal year ended September 30, 1992,
                  Incentive Stock Option Plan, dated               Commission File No. 33-15495, incorporated herein
                  as of June 2, 1992                               by reference

     4.10         Form of Mesa Airlines, Inc. Outside              Filed as Exhibits 4.1, 4.2 and 4.3 to
                  Directors Stock Option Plan, dated as of         Registration No. 33-09395 effective August 1,
                  March 9, 1993                                    1996
</TABLE>

<PAGE>   19

<TABLE>
<CAPTION>

    EXHIBIT
    NUMBER        DESCRIPTION                                      REFERENCE
    ------        -----------                                      ---------
    <S>          <C>                                               <C>

     4.11         Form of Stock Option issued under Mesa           Filed as Exhibit 4.4 to Registration No.
                  Airlines, Inc. Outside Director's Stock          33-09395 effective August 1, 1996
                  Option Plan, dated as of March 9, 1993

     4.12         Form of Mesa Airlines, Inc. Additional           Filed as Exhibit 4.5 to Registration No.
                  Outside Directors Stock Option Plan dated as     33-09395 effective August 1, 1996
                  of December 9, 1994

     4.13         Form of Non-Qualified Stock Option Issued        Filed as Exhibit 4.6 to Registration No.
                  Under Mesa Airlines, Inc. Additional Outside     33-09395 effective August 1, 1996
                  Directors' Stock Option Plan

     4.14         Form of Mesa Air Group, Inc. Restated and        Filed as Exhibit 4.1 to Registration No.
                  Amended Employee Stock Option Plan dated         33-02791 effective April 24, 1996
                  April 23, 1996

     4.15         Form of Non-Qualified Stock Option issued        Filed as Exhibit 4.2 to Registration No.
                  under Mesa Air Group, Inc. Restated and          33-02791 effective April 24, 1996
                  Amended Employee Stock Option Plan dated
                  April 23, 1996

     4.16         Form of Qualified Stock Option issued under      Filed as Exhibit 4.3 to Registration No.
                  Mesa Air Group, Inc. Restated and Amended        33-02791 effective April 24, 1996
                  Employee Stock Option Plan dated April 23,
                  1996

     10.17        Agreement between Beech Aircraft Corporation     Filed as Exhibit 10.30 to Form S-1,
                  and Mesa Airlines, Inc., dated April 30, 1990    Registration No. 33-35556 effective December 6,
                                                                   1990, incorporated herein by reference

     10.18        Sublease Agreement between Air Midwest, Inc.     Filed as Exhibit 10.32.1 to Form S-1,
                  and Mesa Airlines, Inc., dated April 27,         Registration No. 33-35556 effective December 6,
                  1990 for Embraer Brasilia aircraft 120.180       1990, incorporated herein by reference

     10.20        Agreement between Air Midwest, Inc. and Mesa     Filed as Exhibit 10.32.3 to Form S-1,
                  Airlines, Inc., dated February 27, 1990, for     Registration No. 33-35556 effective December 6,
                  purchase of four Embraer Brasilia aircraft       1990, incorporated herein by reference

     10.21        Letter Agreement between McDonnell Douglas       Filed as Exhibit 10.32.4 to Form S-1,
                  Finance Corporation, Air Midwest, Inc. and       Registration No. 33-35556 effective December 6,
                  Mesa Airlines, Inc., dated March 19, 1990,       1990, incorporated herein by reference
                  as amended, regarding lease and sublease of
                  four Embraer Brasilia aircraft

     10.22        Sublease Agreement between Air Midwest Inc.      Filed as Exhibit 10.32.5 to Form S-1,
                  and Mesa Airlines, Inc., dated July 26,          Registration No. 33-35556 effective December 6,
                  1990, for Embraer Brasilia aircraft 120.193      1990, incorporated herein by reference

     10.23        Lease Agreement between McDonnell Douglas        Filed as Exhibit 10.32.6 to Form S-1, 
                  Finance Corporation and Mesa Airlines, Inc.,     Registration No. 33-35556 effective December 6, 
                  dated July 26, 1990, for Embraer Brasilia 1990,  incorporated herein by reference 
                  aircraft 120.193

     10.24        Sublease Agreement between Air Midwest Inc.      Filed as Exhibit 10.32.7 to Form S-1,
                  and Mesa Airlines, Inc., dated September 26,     Registration No. 33-35556 effective December 6,
                  1990, for Embraer Brasilia aircraft 120.203      1990, incorporated herein by reference
</TABLE>

<PAGE>   20

<TABLE>
<CAPTION>

    EXHIBIT
    NUMBER        DESCRIPTION                                      REFERENCE
    ------        -----------                                      ---------
    <S>          <C>                                               <C>

     10.25        Lease Agreement between McDonnell Douglas        Filed as Exhibit 10.32.8 to Form S-1, 
                  Finance Corporation and Mesa Airlines, Inc.,     Registration No. 33-35556 effective December 6, 
                  dated September 26, 1990, for Embraer 1990,      incorporated herein by reference
                  Brasilia aircraft 120.203

     10.27        Expanded Partner Agreement between United        Filed as Exhibit 19.3 to Registrant's Form 10-Q 
                  Air Lines, Inc., and Mesa Airlines, Inc.,        for the quarterly period ended June 30, 1990,
                  dated February 15, 1990                          Commission File No. 0-15495, incorporated
                                                                   herein by reference

     10.29        Form of Directors' and Officers'                 Filed as Exhibit 10.41 to Form S-1,
                  Indemnification Agreement                        Registration No. 33-35556 effective December 6,
                                                                   1990, incorporated herein by reference

     10.31        Agreement Relating to the Settlement of          Filed as Exhibit 10.45 to Form S-1,
                  Interline Accounts through Airlines Clearing     Registration No. 33-35556 effective December 6,
                  House, Inc., between Airlines Clearing           1990, incorporated herein by reference
                  House, Inc. and Mesa Airlines, Inc., dated
                  September 2, 1981

     10.32        Agreement between Beech Aircraft Corporation     Filed as Exhibit 10.42 to Form 10-K for fiscal
                  and Mesa Airlines, Inc., dated September 18,     year ended September 30, 1991, Commission File
                  1991                                             No. 0-15495, incorporated herein by reference

     10.33        Agreement between US Airways, Inc. and Air       Filed as Exhibit 10.43 to Form 10-K for fiscal
                  Midwest, Inc.                                    year ended September 30, 1991, Commission File
                                                                   No. 0-15495, incorporated herein by reference

     10.34        Agreement between US Airways, Inc. and           Filed as Exhibit 10.44 to Form 10-K for fiscal
                  FloridaGulf Airlines, Inc.                       year ended September 30, 1991, Commission File
                                                                   No. 0-15495, incorporated herein by reference

     10.35        Sublease agreement between Trans States          Filed as Exhibit 10.45 to Form 10-K for fiscal
                  Airlines, Inc. and Air Midwest, Inc.             year ended September 30, 1992, Commission File
                                                                   No. 0-15495, incorporated herein by reference

     10.37        Agreement between Beech Aircraft                 Filed as Exhibit 10.47 to Form 10-K for fiscal
                  Corporation, Beech Acceptance Corporation,       year ended September 30, 1992, Commission File
                  Inc. and Mesa Airlines, Inc., dated August       No. 0-15495, incorporated herein by reference
                  21, 1992

     10.38        Agreement between America West Airlines,         Filed as Exhibit 10.48 to Form 10-K for fiscal
                  Inc. and Mesa Airlines, Inc.                     year ended September 30, 1992, Commission File
                                                                   No. 0-15495, incorporated herein by reference

     10.39        Agreement between United Air Lines, Inc. and     Filed as Exhibit 10.49 to Form 10-K for fiscal
                  WestAir Commuter Airlines, Inc. (WestAir)        year ended September 30, 1992, Commission File
                                                                   No. 0-15495, incorporated herein by reference

     10.40        Plan and Agreement to Merge between Mesa         Filed as Exhibit A to Form S-4 Registration No. 
                  Airlines, Inc., Mesa Acquisition Corporation     33-45638, effective April 17, 1992, 
                  and WestAir Holding, Inc., dated February 7,     incorporated herein by reference 
                  1992

     10.41        Certificate of Public Convenience and            Filed as Exhibit 10.1(a) to WestAir Holding,
                  Necessity for WestAir Commuter Airlines, Inc.    Inc.'s Registration Statement on Form S-1,
                                                                   Commission File No. 33-24316, incorporated
                                                                   herein by reference

     10.42        Air Carrier Operating Certificate for WestAir    Filed as Exhibit 10. to WestAir Holding, Inc.'s
                                                                   Registration Statement on Form S-1, Commission
                                                                   File No. 33-24316, incorporated herein by
                                                                   reference 
</TABLE>

<PAGE>   21

<TABLE>
<CAPTION>

    EXHIBIT
    NUMBER        DESCRIPTION                                      REFERENCE
    ------        -----------                                      ---------
    <S>          <C>                                               <C>

     10.46        Original Agreement to Lease dated as of          Filed as Exhibit 10.44 to WestAir Holding,
                  April 27, 1987 between NPA, Inc. ("NPA") and     Inc.'s Registration Statement on Form S-1,
                  British Aerospace, Inc. ("BAe") with a           Commission File No. 33-24316, incorporated
                  Letter to FG Holdings, Inc. ("FGH") dated        herein by reference
                  March 11, 1988 and Amendment No. 1 to
                  Agreement to Lease dated as of March 3, 1988
                  between BAe and FGH

     10.47        Side Letter Agreement to NPA from JACO dated     Filed as Exhibit 10.48 to WestAir Holding, 
                  June 4, 1987                                     Inc.'s Registration Statement on Form S-1,
                                                                   Commission File No. 33-24316, incorporated
                                                                   herein by reference

     10.49        Employment Agreement dated as of                 Filed as Exhibit 10.51(b) to WestAir Holding,
                  September 1, 1988 between WestAir and            Inc.'s Registration Statement on Form S-1,
                  Maurice J. Gallagher Jr.                         Commission File No. 33-24316, incorporated
                                                                   herein by reference

     10.50        Aviation Land and Building Lease and             Filed as Exhibit 10.164 to the Pre-effective
                  Agreement between City of Fresno, California     Amendment No. 1, filed October 19, 1988, to
                  and WestAir dated January 7, 1986                WestAir Holding, Inc.'s Registration Statement
                                                                   on Form S-1, Commission File No. 33-24316,
                                                                   incorporated herein by reference

     10.51        Airport Operating Permit between Airport         Filed as Exhibit 10.67 to WestAir Holding,
                  Commission of City and County of San             Inc.'s Registration Statement on Form S-1,
                  Francisco and WestAir                            Commission File No. 33-24316, incorporated
                                                                   herein by reference

     10.58        Promissory Note to Textron for spare parts       Filed as Exhibit 10.80 to WestAir Holding, 
                  as executed by WestAir, dated December 30,       Inc.'s Form 10-K dated December 31, 1988, 
                  1988                                             Commission File No. 33-24316, incorporated
                                                                   herein by reference

     10.59        Agreement to lease Jetstream model 3101          Filed as Exhibit 2.1 to WestAir Holding, Inc.'s
                  aircraft and Jetstream model 3201                Form 8-K filed June 8, 1989, Commission File
                  aircraft between BAe and WestAir, dated          No. 33-24316, incorporated herein by reference
                  May 11, 1989

     10.60        Amendment to Agreement to Lease dated May        Filed as Exhibit 10.38 to WestAir Holding,
                   11, 1989 between WestAir and BAe, dated         Inc.'s Form 10-K for the year ended  
                  February 15, 1990                                December 31, 1989, Commission File No. 33-24316,  
                                                                   incorporated herein by reference

     10.61        Amended and Restated Stock Purchase              Filed as Exhibit 10.42(a) to WestAir Holding,
                  Agreement, dated September 30, 1991 among        Inc.'s Form 10-K for the year ended December
                  WestAir Holding, Inc., WestAir Commuter          31, 1991, Commission File No. 33-24316,
                  Airlines, Inc. and Atlantic Coast Airlines,      incorporated herein by reference
                  Inc., relating to the sale of the Atlantic
                  Coast division of WestAir Commuter Airlines,
                  Inc.

     10.65        Agreement of Purchase and Sales of Assets by     Filed as Exhibit 10.90 to Mesa Airlines, Inc.
                  and among Crown Airways, Inc., Phillip R.        Form 10-K for the year ended September 30,
                  Burnaman, A. J. Beiga and Mesa Airlines,         1994, Commission File No. 0-15495
                  Inc., dated as of December 16, 1993

     10.66        Supplemental Agreement No. 9/03/94               Filed as Exhibit 10.66 to Mesa Airlines, Inc.
                  Beechcraft 1900 D Airliner Acquisition           Form 10-K for the year ended September 30,
                  Master Agreement between Mesa Airlines,          1994, Commission File No. 0-15495
                  Inc., Beech Aircraft Corporation and Beech
                  Acceptance Corporation, Inc., dated as of
                  September 23, 1994
</TABLE>


<PAGE>   22


<TABLE>
<CAPTION>

    EXHIBIT
    NUMBER        DESCRIPTION                                      REFERENCE
    ------        -----------                                      ---------
    <S>          <C>                                               <C>

     10.67        Form of Lease Agreement between Beech            Filed as Exhibit 10.67 to Mesa Airlines, Inc.
                  Acceptance Corporation, Inc. and Mesa            Form 10-K for the year ended September 30,
                  Airlines, Inc., negotiated September 30,         1994, Commission File No. 0-15495
                  1994 for all prospective 1900 D Airliner
                  leases.

     10.68        Asset Purchase Agreement dated July 29, 1994     Filed as Exhibit 10.68 to Mesa Airlines, Inc.
                  among Pennsylvania Commuter Airlines, Inc.,      Form 10-K for the year ended September 30,
                  dba Allegheny Commuter Airlines, US Airways      1994, Commission File No. 0-15495
                  Leasing and Services, Inc., and Mesa
                  Airlines, Inc.

     10.69        Letter Agreement in Principle dated as of        Filed as Exhibit 10.69 to Mesa Airlines, Inc.
                  October 16, 1994 among Air Wisconsin, Inc.,      Form 10-K for the year ended September 30,
                  United Air Lines Inc. and Mesa Airlines,         1994, Commission File No. 0-15495
                  Inc. (Certain portions deleted pursuant to
                  request for confidential treatment)
                  (Referred to erroneously as Exhibit 10.94 in
                  letter asking for confidential treatment to
                  Securities and Exchange Commission dated
                  12-23-94 from Chapman & Culture)

     10.70        Subscription Agreement between AmWest            Filed as Exhibit 10.70 to Mesa Airlines, Inc.
                  Partners, L.P. and Mesa Airlines, Inc. dated     Form 10-K for the year ended September 30,
                  as of June 28, 1994                              1994, Commission File No. 0-15495

     10.71        Omnibus Agreement                                Filed as Exhibit 10.71 to Mesa Air Group, Inc.
                                                                   Form 10-Q for the quarter ended December 31,
                                                                   1994, Commission File No. 0-15495

     10.72        Aircraft Purchase and Sale Agreement             Filed as Exhibit 10.72 to Mesa Air Group, Inc.
                                                                   Form 10-Q for the quarter ended December 31,
                                                                   1994, Commission File No. 0-15495

     10.73        Expendable and Rotable Spare Parts and Sale      Filed as Exhibit 10.73 to Mesa Air Group, Inc.
                  Agreement                                        Form 10-Q for the quarter ended December 31,
                                                                   1994, Commission File No. 0-15495

     10.74        United Express Agreement Amendment               Filed as Exhibit 10.74 to Mesa Air Group, Inc.
                                                                   Form 10-Q for the quarter ended December 31,
                                                                   1994, Commission File No. 0-15495

     10.75        Side Letter Agreement                            Filed as Exhibit 10.75 to Mesa Air Group, Inc.
                                                                   Form 10-Q for the quarter ended December 31,
                                                                   1994, Commission File No. 0-15495

     10.76        First Amendment to Omnibus Agreement             Filed as Exhibit 10.76 to Mesa Air Group, Inc.
                                                                   Form 10-Q for the quarter ended December 31,
                                                                   1994, Commission File No. 0-15495

     10.77        Operating Lease Agreement                        Filed as Exhibit 10.77 to Mesa Air Group, Inc.
                                                                   Form 10-Q for the quarter ended December 31,
                                                                   1994, Commission File No. 0-15495

     10.78        Item 3. Legal Proceedings - Form 10-K dated      Filed as Exhibit 10.78 to Mesa Air Group, Inc.
                  September 30, 1994                               Form 10-Q for the quarter ended December 31,
                                                                   1994, Commission File No. 0-15495
</TABLE>

<PAGE>   23


<TABLE>
<CAPTION>

    EXHIBIT
    NUMBER        DESCRIPTION                                      REFERENCE
    ------        -----------                                      ---------
    <S>          <C>                                               <C>

     10.79        Purchase Agreement B95-7701-PA-200 between       Filed as Exhibit 10.79 to Mesa Air Group, Inc.
                  Bombardier Inc. and Mesa Airlines, Inc.          Form 10-Q for the quarter ended March 31, 1995,
                                                                   Commission File No. 0-15495

     10.81        Letter of Understanding between Mesa Air         Filed as Exhibit 10.81 to Mesa Air Group, Inc.
                  Group, Inc. and Raytheon Aircraft Company        Form 10-Q for the quarter ended March 31, 1996,
                  (RAC) dated April 12, 1996.                      Commission File No. 0-15495

     10.82        Supplemental Agreement No. 05/22/96,             Filed as Exhibit 10.82 to Mesa Air Group, Inc.
                  Beechcraft 1900D Airliner Acquisition Master     Form 10-Q for the quarter ended March 31, 1997,
                  Agreement between Mesa Air Group, Inc.,          Commission File No. 0-15495
                  Raytheon Aircraft Company and Raytheon
                  Aircraft Credit Corporation

     10.83        Bombardier Regional Aircraft Division            Filed as Exhibit 10.83 to Mesa Air Group, Inc.
                  Purchase Agreement CRJ-0351 between              Form 10-Q for the quarter ended December 31,
                  Bombardier Inc. and Mesa Air Group, Inc.         1996, Commission File No. 0-15495

     10.84        Aircraft Option Exercise B97-7701-RJTL-3492L     Filed as Exhibit 10.84 to Mesa Air Group, Inc.
                  dated as of August 15, 1997 between Mesa Air     Form 10-K for the fiscal year ended 
                  Group, Inc. and Bombardier Inc.  (Request        September 30, 1997, Commission File No. 0-15495.
                  for confidential treatment submitted to SEC.)

     10.85        Bombardier Regional Aircraft Division            Filed as Exhibit 10.85 to Mesa Air Group, Inc.
                  Settlement Agreement B97-7701-RJTL-3493L         Form 10-K for the fiscal year ended 
                  dated as of August 15, 1997 between Mesa Air     September 30, 1997, Commission File No. 0-15495.
                  Group, Inc. and Bombardier Inc.  (Request
                  for confidential treatment submitted to SEC.)

     10.86        Service Agreement dated as of November 11,       Filed as Exhibit 10.86 to Mesa Air Group, Inc.
                  1997 between Mesa Airlines, Inc. and US          Form 10-K for the fiscal year ended 
                  Airways, Inc. (Request for confidential          September 30, 1997, Commission File No. 0-15495.
                  treatment submitted to SEC.)

     10.87        Letter Agreement dated as of March 26, 1998      Filed as Exhibit 10.87 to Mesa Air Group, Inc.
                  between Mesa Airlines, Inc. and America West     Form 10-Q for the quarter ended March 31,
                  Airlines, Inc.  (Request for confidential        1998, Commission File No. 0-15495.
                  treatment submitted to SEC.)

     10.88        Employment Agreement dated as of March 13,       Filed as Exhibit 10.88 to Mesa Air Group, Inc.
                  1998, between Mesa Air Group, Inc. and           Form 10-Q for the quarter ended March 31, 
                  Jonathan G. Ornstein                             1998, Commission File No. 0-15495.

     10.89        Form of Employment Agreement dated as of         Filed as Exhibit 10.89 to Mesa Air Group, Inc.
                  January 5, 1998 entered into by and between      Form 10-Q for the quarter ended March 31,
                  Mesa Air Group, Inc. and Gary E. Risley, W.      1998, Commission File No. 0-15495.
                  Stephen Jackson, J. Clark Stevens and
                  various other officers of the Company and
                  its subsidiaries

     10.90        Letter Agreement dated as of February 4,         Filed as Exhibit 10.90 to Mesa Air Group, Inc.
                  1998 between Mesa Air Group, Inc. and Larry      Form 10-Q for the quarter ended March 31,
                  L. Risley                                        1998, Commission File No. 0-15495.

     10.91        Code Share and Revenue Sharing Agreement         Filed herewith
                  between Mesa Airlines, Inc. and America
                  West Airlines, Inc. (Request for confidential
                  treatment submitted to SEC.)

     27           Financial Data System                            Filed herewith
</TABLE>

<PAGE>   1
                                                 EXHIBIT 10.91 REDACTED VERSION
                                                 ------------------------------


                    CODE SHARE AND REVENUE SHARING AGREEMENT


         This CODE SHARE AND REVENUE SHARING AGREEMENT (the "Agreement") is made
and entered into to be effective as of July 15, 1998 (the "Effective Date"), by
and between AMERICA WEST AIRLINES, INC., a Delaware corporation ("AWA"), and
MESA AIRLINES, INC., a Nevada corporation ("Mesa").

                                 R E C I T A L S
                                 ---------------


         A. AWA holds a certificate of public convenience and necessity issued
by the Department of Transportation ("DOT") authorizing AWA to engage in the
interstate and oversees air transportation of persons, property and mail between
all points in the United States, its territories and possessions.

         B. Mesa holds a certificate of public convenience and necessity issued
by the DOT authorizing Mesa to engage in the interstate transportation of
persons, property and mail in the United States, its territories and
possessions.

         C. AWA owns various trades marks, services marks and logos, including
"America West Airlines," "America West Express," and distinctive exterior color
decor and patterns on its aircraft, hereinafter referred to individually and
collectively as the "AWA Service Marks".

         D. AWA and Mesa desire to provide scheduled air transportation services
as America West Express and to share in the revenue and costs of such services
as provided in this Agreement.

         NOW, THEREFORE, in consideration of the promises, covenants,
representations and warranties hereinafter set forth, and for other valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, AWA
and Mesa agree as set forth below.

                                A G R E E M E N T
                                -----------------


1.       Rights, Responsibilities and Obligations of Mesa:

         1.1      Flight Service. During the term of this Agreement, Mesa shall
                  operate America West Express air transportation services (the
                  "Flight Services"), using the fleet of aircraft as set forth
                  in Section 1.2, to and from the cities and based upon the
                  schedule [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                  WITH THE SECURITIES AND EXCHANGE COMMISSION] (the "Schedule")
                  in written notice to Mesa (a "Schedule Notice"). For purposes
                  of this Agreement, "Flights" means flights operated pursuant
                  to the Schedule. [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE 

<PAGE>   2
                  COMMISSION] When creating a Schedule, AWA shall: (i) take into
                  account Mesa's aircraft maintenance requirements; (ii) create
                  a Schedule which will permit Mesa to schedule flight crews in
                  a manner consistent with industry operational practices; (iii)
                  schedule block times based on AWA's internal block time
                  policy; (iv) provide for a reasonable time on the ground for
                  Aircraft between arrivals and departures; (v) take into
                  account airport facilities available for Aircraft handling;
                  and (vi) provide for scheduled heavy maintenance on Aircraft
                  as required from time to time. Mesa shall implement all
                  changes in the Schedule contained in a Schedule Notice in
                  accordance with AWA's scheduling requirements but in no event
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] after receipt of a
                  Schedule Notice. Mesa or any of its affiliates shall not
                  provide any flight service for any other airline for flights
                  that originate in or end in Phoenix, Arizona, except that Mesa
                  may provide such flight service for itself on all essential
                  air service ("EAS") routes that AWA removes from the Schedule.

                  Mesa acknowledges that AWA may Schedule Flights using CRJs in
                  and out of the Columbus, Ohio airport. If such Flights are
                  Scheduled, Mesa and AWA, in good faith based on prevailing
                  market costs and expenses, shall adjust the Guaranteed Costs
                  payable pursuant to Paragraph 6.2 to take into consideration
                  the increased cost of operating such Flights in such location.
                  If the Guaranteed Costs are adjusted, then AWA and Mesa shall
                  execute and attach an addendum to this Agreement supplementing
                  the Guaranteed Costs Schedule.

         1.2      Fleet.

                  1.2.1    Initial Fleet. Commencing on the Commencement Date
                           (as defined in Paragraph 7, below), Mesa shall
                           provide the Flight Services using the following
                           aircraft (collectively, the "Fleet"; with respect to
                           any one aircraft type, the "Subfleet"; and
                           individually, the "Aircraft"):
<TABLE>
<CAPTION>

                           Number                                   Aircraft Type ("Subfleet")
                           ------                                   -------------------------
                           <S>                                  <C>
                           [CONFIDENTIAL PORTION                deHavilland DHC-8-200 ("Dash 8")
                           DELETED AND FILED
                           SEPARATELY WITH THE
                           SECURITIES AND EXCHANGE
                           COMMISSION]

                           [CONFIDENTIAL PORTION                Hawker-Beech 1900 ("Beech 1900")
                           DELETED AND FILED
                           SEPARATELY WITH THE
                           SECURITIES AND EXCHANGE
                           COMMISSION]
</TABLE>





                                        2



<PAGE>   3

<TABLE>
<CAPTION>

                           <S>                                  <C>
                           [CONFIDENTIAL PORTION                Canadair Regional Jet-50 ("CRJ")
                           DELETED AND FILED
                           SEPARATELY WITH THE
                           SECURITIES AND EXCHANGE
                           COMMISSION]

</TABLE>


                  1.2.2    CRJ Fleet Expansion. Mesa is currently obligated to
                           acquire 16 additional CRJs at a rate of one CRJ per
                           calendar month commencing in September 1998 and
                           ending in December 1999 (the "Committed
                           Acquisitions") and holds options to acquire 16
                           additional CRJs commencing in June 2000 (the "CRJ
                           Options").

                           (a) In each of September, October, November and
                           December 1998, January, February and March 1999 and a
                           calendar month during the period of April-December,
                           1999 as mutually agreed to, in writing, between AWA
                           and Mesa on or before [CONFIDENTIAL PORTION DELETED
                           AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION] (the "CRJ Decision Date"), Mesa shall
                           acquire [CONFIDENTIAL PORTION DELETED AND FILED
                           SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION] new CRJ from the Committed Acquisitions
                           and shall increase the Subfleet of CRJs by
                           [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION] new CRJ
                           (thereby increasing the Subfleet of CRJs to
                           [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION] CRJs).
                           If AWA and Mesa are unable to agree on the month for
                           the final CRJ delivery required by this Paragraph
                           1.2.2 timely, then the delivery month proposed by AWA
                           shall govern.

                           (b) AWA has the options to expand the CRJ Subfleet by
                           up to [CONFIDENTIAL PORTION DELETED AND FILED
                           SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION] additional CRJs from the Committed
                           Acquisitions in each of [CONFIDENTIAL PORTION DELETED
                           AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION] calendar months between April and
                           December 1999 as mutually agreed to between AWA and
                           Mesa, in writing, by the CRJ Decision Date (the
                           "Option Agreement"). If AWA and Mesa are unable to
                           agree on the [CONFIDENTIAL PORTION DELETED AND FILED
                           SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION] delivery months for the options timely,
                           then the delivery months proposed by AWA shall
                           govern. On or before the first day of each fourth
                           calendar month prior to each of the months set forth
                           in the Option Agreement





                                        3



<PAGE>   4



                           (each a "First Exercise Date"), AWA, by written
                           notice to Mesa, shall have the option to require Mesa
                           to increase the CRJ Subfleet by the addition of
                           [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION] new CRJ
                           (the "First CRJ Expansion Options"). Each of the
                           [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION] First
                           CRJ Expansion Options are separate and individual
                           options and may be exercised or not exercised on a
                           separate and individual basis.

                           (c) AWA shall have the options to expand the CRJ
                           Subfleet by [CONFIDENTIAL PORTION DELETED AND FILED
                           SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION] additional CRJs from the CRJ Options. On
                           or before the dates Mesa is required to give notice
                           to the Aircraft manufacturer in order to exercise
                           each of the CRJ Options (each, a "Second Option
                           Date"), AWA, by written notice to Mesa, shall have
                           the option to require Mesa to acquire all the CRJ
                           Aircraft that are the subject of the CRJ Option and
                           increase the CRJ Subfleet by the addition of such new
                           CRJ Aircraft, but not to exceed [CONFIDENTIAL PORTION
                           DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                           EXCHANGE COMMISSION] Aircraft, at the times provided
                           in such CRJ Option (the "Second CRJ Expansion
                           Options"). Mesa and AWA acknowledge that each of the
                           CRJ Options requires Mesa to commit to 4 Aircraft.
                           Mesa shall be responsible for acquiring all Aircraft
                           pursuant to each of the CRJ Options, however the CRJ
                           Subfleet shall only be increased by [CONFIDENTIAL
                           PORTION DELETED AND FILED SEPARATELY WITH THE
                           SECURITIES AND EXCHANGE COMMISSION] Aircraft and Mesa
                           shall be responsible for additional CRJ Aircraft
                           acquired pursuant to the exercise of the CRJ Options.
                           AWA shall exercise the Second CRJ Expansion Option
                           and acquire the CRJ Aircraft pursuant to the CRJ
                           Expansion Option in groups of [CONFIDENTIAL PORTION
                           DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                           EXCHANGE COMMISSION]. The Second Option Dates and the
                           number of Aircraft which are the subject of those
                           dates are: [CONFIDENTIAL PORTION DELETED AND FILED
                           SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION]. The Second CRJ Expansion Options are
                           separate and individual options and may be exercised
                           or not exercised on a separate and individual basis.

                  1.2.3    Fleet Expansion. If a change in the Schedule
                           permitted by Section 1.1, above, requires additional
                           CRJ or Dash 8 to provide the Flight Services, then
                           Mesa, not later than [CONFIDENTIAL PORTION





                                        4



<PAGE>   5



                           DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                           EXCHANGE COMMISSION] after receipt of written notice
                           from AWA, shall increase the number of Aircraft in
                           the Fleet, subject to Aircraft availability on
                           commercially reasonable terms, with Aircraft
                           designated by AWA, to the extent necessary to provide
                           Flight Services pursuant to this Agreement.

                  1.2.4    Fleet Reduction. Except as otherwise permitted by
                           Paragraph 1.2.5, upon [CONFIDENTIAL PORTION DELETED
                           AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION] prior written notice from AWA, AWA may
                           require Mesa to reduce the number of Aircraft in the
                           Fleet. AWA shall not require Mesa to reduce the
                           number of Aircraft: (i) in any Subfleet by more than
                           [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION] Aircraft
                           in any [CONFIDENTIAL PORTION DELETED AND FILED
                           SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION]. For purposes of this Agreement,
                           [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION] means
                           each period during the Term (as defined below)
                           commencing on January 1 and ending on [CONFIDENTIAL
                           PORTION DELETED AND FILED SEPARATELY WITH THE
                           SECURITIES AND EXCHANGE COMMISSION] and commencing on
                           [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION] and
                           ending on [CONFIDENTIAL PORTION DELETED AND FILED
                           SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION], with the first [CONFIDENTIAL PORTION
                           DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                           EXCHANGE COMMISSION] commencing on [CONFIDENTIAL
                           PORTION DELETED AND FILED SEPARATELY WITH THE
                           SECURITIES AND EXCHANGE COMMISSION]; (ii) in the
                           Fleet on the Commencement Date prior to [CONFIDENTIAL
                           PORTION DELETED AND FILED SEPARATELY WITH THE
                           SECURITIES AND EXCHANGE COMMISSION]; (iii) in a
                           Subfleet for a period of 1 year measured from the
                           last date that an Aircraft is added to the Subfleet;
                           provided, however, that April 30, 1999 shall be
                           deemed to be the last date AWA acquires the last of
                           the CRJs pursuant to Paragraph 1.2.2(b) for purpose
                           of this subsection and the scheduled delivery date
                           shall be deemed the date AWA acquires a CRJ pursuant
                           to Paragraph 1.2.2(c); (iv) in the Dash 8 Subfleet
                           below 8 Aircraft; and (v) in the CRJ Subfleet below 8
                           Aircraft.






                                        5



<PAGE>   6



                  1.2.5    Elimination of Beech 1900s. Notwithstanding the
                           above, AWA by written notice given to Mesa within
                           [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION] after
                           Effective Date (the "Elimination Notice"), may
                           require Mesa to reduce the Subfleet of Beech 1900s to
                           [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION] on the
                           first anniversary date of the Effective Date. If AWA
                           elects to eliminate the Beech 1900s from the terms of
                           this Agreement, then AWA and Mesa shall attempt to
                           negotiate a code share agreement to provide service
                           to the destinations serviced by the Beech 1900s on
                           the Effective Date on economic terms and conditions
                           substantially similar to the terms and conditions in
                           the Existing Agreement, as defined in Paragraph 7
                           (the "Beech Code Agreement"). If AWA and Mesa are
                           unable to reach an agreement on the terms and
                           conditions of the Beech Code Agreement within
                           [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION] after
                           AWA provides the Elimination Notice, then AWA may
                           enter into an agreement with any other flight service
                           provider to provide flight services to such
                           destinations on terms and conditions acceptable to
                           AWA.

         1.3      Other Services. In addition to the Flight Services, Mesa, at
                  its sole cost and expense, shall provide the following
                  services in connection with the Flight Services (the "Other
                  Services"): [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                  WITH THE SECURITIES AND EXCHANGE COMMISSION] Mesa, at its
                  expense, shall provide all facilities, machinery, equipment
                  and inventory required to [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]
                  the Other Services. Mesa shall require personnel providing the
                  Other Services to comply with all rules, regulations and
                  directives promulgated for all AWA operations from time to
                  time.

         1.4      Personnel; Training. Mesa shall employ and maintain a
                  sufficient number of competent, trained personnel, including,
                  but not limited to [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION] the
                  Flight Services and Other Services as required by this
                  Agreement. In addition, Mesa shall employ and maintain a
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] and [CONFIDENTIAL PORTION
                  DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION] based in the Phoenix Metropolitan area based on
                  the Flight Services to be provided pursuant to this Agreement.
                  Mesa shall cause all Mesa personnel providing Flight Services
                  or Other





                                        6



<PAGE>   7



                  Services to wear uniforms approved by AWA and shall comply
                  with all appearance guidelines required of all AWA personnel.

                  Mesa shall provide initial training, recurrent training and
                  customer service training to personnel reasonably identified
                  by AWA at programs approved by AWA. AWA shall provide
                  applicable training materials. Mesa shall pay all training
                  expenses including AWA instructor travel expenses. In the
                  event AWA becomes a hazardous materials carrier, Mesa, at
                  AWA's expense, shall conduct all hazardous materials training
                  required by AWA or AWA's other code share partners.

         1.5      Service Quality and Level. All Flight Services and Other
                  Services shall be provided by Mesa at a service quality and
                  level of service (other than first class service) equal to or
                  greater than the service quality and level of service provided
                  by AWA to the extent applicable to the type of Aircraft used
                  to provide the Flight Services. All Aircraft shall be equipped
                  with service amenities necessary to provide the service
                  quality and level of service required by this paragraph.

         1.6      Maintenance.

                  1.6.1    Obligation. Mesa, at its own cost and expense, shall
                           be responsible for the service, repair, maintenance,
                           overhauling and testing of each Aircraft: (i) in
                           compliance with the maintenance program for each
                           Aircraft as approved by the FAA and pursuant to all
                           applicable aircraft maintenance manuals applicable to
                           each Aircraft; (ii) so as to keep each Aircraft in
                           good and safe operating condition; and (iii) so as to
                           keep the Aircraft in such operating condition as may
                           be necessary to enable the airworthiness
                           certification of the Aircraft to be maintained in
                           good standing. Mesa shall retain full authority and
                           control over the service, repair, maintenance,
                           overhauling and testing of each Aircraft. AWA shall
                           have no obligations or duties with respect to the
                           service, repair, maintenance, overhauling or testing
                           of any Aircraft.

                  1.6.2    Ground Equipment. Mesa, [CONFIDENTIAL PORTION DELETED
                           AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION], shall [CONFIDENTIAL PORTION DELETED AND
                           FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION] all [CONFIDENTIAL PORTION DELETED AND
                           FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION].

                  1.6.3    Location. Mesa shall maintain three maintenance
                           bases, currently located in Fresno, California for
                           CRJs, Grand Junction, Colorado for Dash 8s, and
                           Farmington, New Mexico for Beech 1900s. Each Schedule
                           prepared by AWA shall provide for not less than





                                        7



<PAGE>   8



                           [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION] of each
                           Subfleet to remain overnight at the applicable
                           maintenance base each night. One Aircraft shall
                           remain overnight for 10 hours and the remainder for
                           at least 8 hours. Mesa shall not relocate any
                           maintenance base, without the prior written consent
                           of AWA, which consent may be withheld if the new
                           location fails to meet AWA's maintenance base
                           requirements. Mesa, with the prior written consent of
                           AWA, may add maintenance bases as necessary to
                           provide the Flight Services at locations which meet
                           AWA's maintenance base requirements.

         1.7      Emergency Operations. Mesa and AWA shall coordinate to develop
                  a plan that complies with applicable Regulations (as defined
                  below) to be implemented in the event of any incident
                  involving personal injury or death to a passenger or crew
                  member on a Flight. The emergency response teams of AWA and
                  Mesa shall coordinate their efforts and shall cooperate fully
                  in response to such emergency.

         1.8      Fleet Configuration, Cleanliness and Appearance.

                  1.8.1    Configuration. All Aircraft in the Fleet on the
                           Commencement Date and Aircraft added to the Fleet
                           shall have a passenger seating configuration and
                           seating capacity as provided on the Aircraft in the
                           Fleet on the Commencement Date. AWA, [CONFIDENTIAL
                           PORTION DELETED AND FILED SEPARATELY WITH THE
                           SECURITIES AND EXCHANGE COMMISSION], may require Mesa
                           to reconfigure or change the seating capacity of an
                           Aircraft. All such requested changes shall be
                           implemented within [CONFIDENTIAL PORTION DELETED AND
                           FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION] after Mesa's receipt of written request
                           from AWA.

                  1.8.2    Cleanliness. Mesa, [CONFIDENTIAL PORTION DELETED AND
                           FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION], shall cause all Aircraft to be cleaned
                           and maintained in an appearance in accordance with
                           cleaning standards, requirements and guidelines
                           promulgated by AWA from time to time and provided to
                           Mesa in writing. All Aircraft shall meet AWA's
                           cleaning and appearance standards, requirements and
                           guidelines within [CONFIDENTIAL PORTION DELETED AND
                           FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION] after the Effective Date.

         1.9      Post-Departure Procedures. [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE



                                       8


<PAGE>   9



                  COMMISSION] shall perform airport post-departure procedures
                  (as defined in AWA's Customer Service Manual) and be
                  responsible for securing and controlling all the contents in
                  the ticket lift envelopes. All ticket lift envelopes should be
                  forwarded and co-mailed to [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]
                  within [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH
                  THE SECURITIES AND EXCHANGE COMMISSION] after flight
                  operations. [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                  WITH THE SECURITIES AND EXCHANGE COMMISSION] (including
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION]) in [CONFIDENTIAL PORTION
                  DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION]. [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION] shall
                  be liable for losses to [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]
                  resulting from [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION] or
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] resulting from
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] to [CONFIDENTIAL PORTION
                  DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION] to [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]
                  policies and procedures.

2.       Rights, Responsibilities and Obligations of AWA.

         2.1      Exclusivity. Mesa shall have the [CONFIDENTIAL PORTION DELETED
                  AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION] to fly the following routes as America West
                  Express: [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                  WITH THE SECURITIES AND EXCHANGE COMMISSION]. In the event
                  Mesa's FCF (as defined in Section 4.4 of this Agreement) on
                  any route for any [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION] falls
                  below [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH
                  THE SECURITIES AND EXCHANGE COMMISSION] (the "FCF
                  Deficiency"), then the exclusivity on such route [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION] on the [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]
                  of the [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY





                                        9



<PAGE>   10



                  WITH THE SECURITIES AND EXCHANGE COMMISSION] after the
                  occurrence of the FCF Deficiency. Notwithstanding the
                  foregoing to the contrary, the [CONFIDENTIAL PORTION DELETED
                  AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION] shall not restrict AWA or any affiliate from
                  flying the [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                  WITH THE SECURITIES AND EXCHANGE COMMISSION]. For purposes of
                  this Agreement, "affiliate" of AWA means any person or entity
                  controlled by AWA or America West Holdings, Inc., a Delaware
                  corporation.

         2.2      Flight Management Items. AWA, [CONFIDENTIAL PORTION DELETED
                  AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION], shall: (i) [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION];
                  (ii) [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH
                  THE SECURITIES AND EXCHANGE COMMISSION]; and (iii)
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION].

         2.3      Marketing/Revenue. AWA, [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]
                  and [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH
                  THE SECURITIES AND EXCHANGE COMMISSION], shall [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION] and [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION].
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] shall provide
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] and [CONFIDENTIAL PORTION
                  DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION] shall [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION].

         2.4      Airport Services. [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION],
                  shall: (i) [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                  WITH THE SECURITIES AND EXCHANGE COMMISSION]; (ii)
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION]; and (iii) [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION]. To the extent Other Services are
                  provided by AWA, [CONFIDENTIAL PORTION DELETED AND





                                       10



<PAGE>   11



                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION].

         2.5      Other Code Share Partners. AWA shall have the right to enter
                  into code share, joint marketing, charter or other
                  alliance-type agreements with any other flight service
                  commuter operator to provide flight services to any
                  destinations or for any routes other than those listed in
                  Section 2.1 or in the Schedule. AWA may permit any of AWA's
                  other code share partners to place their code on any Flight.
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION].

         2.6      Charters. AWA, [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]. Mesa
                  shall operate such charter flights provided flight crews and
                  Aircraft are available and not otherwise subject or committed
                  to maintenance requirements. Mesa is required to operate the
                  charters in a manner consistent with the terms of this
                  Agreement. [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                  WITH THE SECURITIES AND EXCHANGE COMMISSION].

3.       Compliance with Regulations.

         3.1      Regulations. Mesa shall perform its obligations and duties
                  under this Agreement, including, without limitation, all
                  Flight Services and Other Services in full compliance with any
                  and all applicable laws, ordinances, codes, statutes, orders,
                  directives, mandates, requirements, rules and regulations,
                  whether now in effect or hereafter adopted or promulgated, of
                  all governmental agencies having jurisdiction over Mesa's
                  operations, including but not limited to the FAA and the DOT
                  (collectively, "Regulations").

         3.2      Flight Operations. Mesa shall be responsible for the operation
                  of each Aircraft and the safe performance of the Flights in
                  accordance with the Regulations and airline industry standard
                  practice and shall retain full authority, operational control
                  and possession of the Aircraft to do so. Mesa, its agents or
                  employees, for the purpose of the safe performance of the
                  Flights, shall have absolute discretion in and shall have sole
                  responsibility for all matters concerning the preparation of
                  each Aircraft for its Flights, and all other matters relating
                  to the technical operation of the Aircraft. Mesa, insofar as
                  such relates to the safe operation of a Flight, shall have
                  sole and absolute discretion as to the load carried and its
                  distribution and as to the decision whether such Flight shall
                  be taken. Mesa shall be solely responsible for and AWA shall
                  have no obligations or duties with respect to the dispatch of
                  all Flights.






                                       11



<PAGE>   12



         3.3      Registration. All Aircraft shall remain registered in the
                  United States of America in accordance with the Regulations.

         3.4      Disclosure. Mesa, [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION] prior
                  written request, shall provide AWA the opportunity to review
                  all operating specifications, operational regulations, manuals
                  and calculations with respect to all Aircraft and flight
                  statistics with respect to all Flights at Mesa's corporate or
                  other relevant offices where such records are located.

         3.5      Review/Audit. AWA, [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION] prior
                  written notice, may review, at Mesa's corporate office,
                  airport ticket offices and other relevant offices, all
                  records, books, logs, files, documentation and information
                  maintained by Mesa, or any of its maintenance or service
                  contracts, in connection with Flight operation, safety and
                  regulatory compliance, employee training, Flight dispatch,
                  Aircraft use, operation, maintenance and repair, Flight
                  incidents and governmental orders, mandates and requirements.

         3.6      Reporting. This Agreement shall be treated as a code share for
                  DOT reporting requirements. AWA shall provide Mesa with such
                  information necessary for Mesa to make the DOT reports and
                  disclosures.

4.       Operational Performance Criteria, Incentives and Penalties.

         4.1      DOT Complaint Rate Criteria. Mesa shall not permit its annual
                  DOT Complaint Rate (defined below) for Flight Services to
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION]. The "DOT Complaint Rat"
                  is defined as the number of consumer complaints received by
                  the DOT for a given calendar year expressed in the terms of
                  the number of complaints per 100,000 passengers flown during
                  that calendar year by Mesa and AWA; provided, however, that
                  the DOT Complaint Rate shall exclude consumer complaints
                  relating solely to (i) [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]; (ii)
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION]; (iii) [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION]; (iv) [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION];
                  and (v) [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                  WITH THE SECURITIES AND EXCHANGE COMMISSION]. For purposes of
                  this Agreement, "AWA's DOT Complaint Rate" shall mean
                  [CONFIDENTIAL





                                       12



<PAGE>   13



                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION]. DOT [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]
                  DOT Complaint Rates. If Mesa's DOT Complaint Rate
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION], within [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION] days after receipt of written demand from
                  AWA, [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH
                  THE SECURITIES AND EXCHANGE COMMISSION]. For example, if
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] for a given year is
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] passengers and
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] is [CONFIDENTIAL PORTION
                  DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION] per [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION] would
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] the [CONFIDENTIAL PORTION
                  DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION] of [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION].

         4.2      Internal Customer Complaint Rate Criteria. [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION] shall not permit its annual ICCR (defined
                  below) for Flight Services to [CONFIDENTIAL PORTION DELETED
                  AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION]. The "ICCR" is defined as the number of complaints
                  received by AWA and Mesa for a given year expressed in the
                  terms of the number of complaints per 100,000 passengers flown
                  during that calendar year by Mesa and AWA; provided, however,
                  that the ICCR shall exclude complaints relating solely to (i)
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION]; (ii) [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION]; (iii) [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION];
                  (iv) [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH
                  THE SECURITIES AND EXCHANGE COMMISSION]; and (v) [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH





                                       13



<PAGE>   14



                  THE SECURITIES AND EXCHANGE COMMISSION].  For purposes of this
                  Agreement, "AWA's ICCR" shall mean [CONFIDENTIAL PORTION
                  DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION].  For example, [CONFIDENTIAL PORTION
                  DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION].

         4.3      On Time Performance Rate Criteria. Mesa shall not permit its
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] (defined below) to
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION]: (i) [CONFIDENTIAL PORTION
                  DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION]; or (ii) [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION] (the
                  "OTP Rate Threshold"). The "OTP Rate" is defined as the
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] (defined below)
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION]. For purposes of this
                  Agreement, "Delayed" means a flight segment that does not
                  arrive at the destination within [CONFIDENTIAL PORTION DELETED
                  AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION] after the scheduled arrival time. [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION] To the extent that Mesa's OTP Rate
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] the OTP Rate Threshold for
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION], within [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION] after receipt of written demand, shall
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION], If Mesa's OTP Rate
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] the OTP Rate Threshold in
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION], then Mesa, within
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] after receipt of written
                  demand, [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                  WITH THE SECURITIES AND EXCHANGE COMMISSION]: (i)
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION]; and (ii) [CONFIDENTIAL
                  PORTION DELETED AND FILED





                                       14



<PAGE>   15



                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION], by
                  which Mesa's OTP Rate [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION] the
                  OTP Rate Threshold. AWA, within [CONFIDENTIAL PORTION DELETED
                  AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION] after receipt of written demand, shall pay to Mesa
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] for each [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION], or [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION],
                  by which Mesa's OTP Rate [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION].

         4.4      Flight Completion Factor. Mesa shall not permit its FCF
                  (defined below) for [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]. "FCF"
                  is defined as the percentage of published, scheduled Flights
                  completed for a calendar month. Flights not completed due to:
                  (i) [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH
                  THE SECURITIES AND EXCHANGE COMMISSION]; (ii) [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION]; or (iii) [CONFIDENTIAL PORTION DELETED
                  AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION]. Mesa, within [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]
                  after receipt of written demand, shall [CONFIDENTIAL PORTION
                  DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION] for each [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION], or
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION], by which [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION]. AWA, within [CONFIDENTIAL PORTION
                  DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION] after receipt of written demand, [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION] by which [CONFIDENTIAL PORTION DELETED
                  AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION]. For purposes of the bonus, [CONFIDENTIAL PORTION
                  DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION].






                                       15



<PAGE>   16



         4.5      Records.

                  4.5.1    Within [CONFIDENTIAL PORTION DELETED AND FILED
                           SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION] the [CONFIDENTIAL PORTION DELETED AND
                           FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION] Mesa shall provide to AWA statements
                           certified by Mesa's chief financial officer as to
                           Mesa's OTP Rate and FCF for the [CONFIDENTIAL PORTION
                           DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                           EXCHANGE COMMISSION], together with such supporting
                           documentation and information AWA may request. Within
                           [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION] after
                           the end of each calendar year, Mesa, to the extent
                           not collected by AWA, shall provide to AWA statements
                           certified by Mesa's chief financial officer as to
                           Mesa's ICCR for the [CONFIDENTIAL PORTION DELETED AND
                           FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION], together with such supporting
                           documentation and information AWA may request. AWA,
                           upon [CONFIDENTIAL PORTION DELETED AND FILED
                           SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION] prior written notice, may review, at
                           Mesa's corporate or other relevant offices, all
                           records and files maintained by Mesa in connection
                           with customer complaints, on-time performance and
                           flight completions. If AWA's review of the records or
                           files reveals that Mesa has under or overstated, as
                           applicable, Mesa's OTP Rate, FCF or ICCR, then Mesa,
                           upon demand, shall pay all sums due based on the
                           accurate calculations and the costs and expenses of
                           AWA in completing such review and, if such under or
                           overstatement is willful or intentional, then Mesa
                           shall be in default under this Agreement.

                  4.5.2    Within [CONFIDENTIAL PORTION DELETED AND FILED
                           SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION] the [CONFIDENTIAL PORTION DELETED AND
                           FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION] AWA shall provide to Mesa statements
                           certified by AWA's chief financial officer as to
                           AWA's OTP Rate for the [CONFIDENTIAL PORTION DELETED
                           AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION], together with such supporting
                           documentation and information Mesa may request.
                           Within [CONFIDENTIAL PORTION DELETED AND FILED
                           SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION] after the end of [CONFIDENTIAL PORTION
                           DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                           EXCHANGE COMMISSION], AWA, to the extent not
                           collected by





                                       16



<PAGE>   17



                           Mesa, shall provide to Mesa statements certified by
                           AWA's chief financial officer as to AWA's ICCR for
                           the [CONFIDENTIAL PORTION DELETED AND FILED
                           SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION], together with such supporting
                           documentation and information Mesa may request. Mesa,
                           upon [CONFIDENTIAL PORTION DELETED AND FILED
                           SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION] prior written notice, may review, at
                           AWA's corporate or other relevant offices, all
                           records and files maintained by AWA in connection
                           with customer complaints, on-time performance and
                           flight completions. If Mesa's review of the records
                           or files reveals that AWA has under or overstated, as
                           applicable, AWA's OTP Rate or ICCR, then AWA, upon
                           demand, shall pay all sums due based on the accurate
                           calculations and the costs and expenses of Mesa in
                           completing such review and, if such under or
                           overstatement is willful or intentional, then AWA
                           shall be in default under this Agreement.

         4.6      Setoff. All undisputed sums payable by Mesa to AWA pursuant to
                  this Paragraph 4 may, at AWA's election, be setoff against
                  amounts next due by AWA to Mesa pursuant to this Agreement.

5.       Irregular Operations.  [CONFIDENTIAL PORTION DELETED AND FILED
         SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]:

         5.1      Equipment Change.   [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]

         5.2      Misconnections.   [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]

         Mesa and AWA, by written notice to the other given not more frequently
         than [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
         SECURITIES AND EXCHANGE COMMISSION] for which the other is responsible
         pursuant to this Section 5 (the "Denied Boarding Invoice"). Mesa and
         AWA shall pay the sums due in each Denied Boarding Invoice within
         [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES
         AND EXCHANGE COMMISSION] after receipt. The Denied Boarding Invoice
         shall be accompanied by supporting documentation containing reasonable
         detail to support the charges set forth in the Denied Boarding Invoice.

6.       Payment of Fees/Revenue Sharing. Mesa and AWA hereby agree to pay the
         following sums as consideration for this Agreement and the provision of
         the Flight Services and Other Services provided for herein:






                                       17



<PAGE>   18



         6.1      Mesa Actual Costs. AWA, in accordance with Paragraph 6.5,
                  shall reimburse to Mesa the following actual costs and
                  expenses actually paid by Mesa with reference to the
                  performance of the Flight Services and Other Services ("Actual
                  Costs"):

                  6.1.1    [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION]

                  6.1.2    [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION]

                  6.1.3    [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION]

                  6.1.4    [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION]

                  6.1.5    [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION]

                  6.1.6    [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION]

                  6.1.7    [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION]

                  6.1.8    [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION]

                  6.1.9    [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                           WITH THE SECURITIES AND EXCHANGE COMMISSION].

                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] In the event any of the
                  services or materials for which AWA pays the Actual Costs are
                  purchased for the Flight Services and Other Services provided
                  by this Agreement and for other services provided by Mesa and
                  its affiliates, then the costs of such services and materials
                  shall be [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                  WITH THE SECURITIES AND EXCHANGE COMMISSION] provided by this
                  Agreement. Mesa shall use commercially reasonable efforts to
                  operate the Flight Services and Other Services in an efficient
                  and cost effective manner to minimize the Actual Costs payable
                  by AWA while maintaining the quality and quantity of services
                  required by this Agreement. Mesa shall take all commercially
                  reasonable actions to minimize the taxes imposed on the Fleet.
                  If requested by AWA, in writing, AWA on





                                       18



<PAGE>   19



                  behalf of Mesa may pursue [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]
                  or [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] on the Fleet or any
                  Aircraft in the Fleet in the manner prescribed by applicable
                  law. An "affiliate" of Mesa means any person or entity
                  controlling, controlled by or under common control with Mesa.

         6.2      Mesa Guaranteed Costs. AWA, in accordance with Paragraph 6.5,
                  shall pay to Mesa the amounts set forth in Exhibit A (the
                  "Guaranteed Costs Schedule"), as [CONFIDENTIAL PORTION DELETED
                  AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION] pursuant to Section 6.4 below (the "Guaranteed
                  Costs"). If the term of this Agreement commences or expires on
                  other than the first or last day of a calendar month, then the
                  Guaranteed Costs payable by AWA shall be prorated based on the
                  actual number of days this Agreement is in effect during such
                  month and the actual number of days in such month.

         6.3      Contract Negotiation. AWA may assist Mesa in the negotiation
                  of contracts for the provision of materials or services
                  subject to the Actual Costs and Guaranteed Costs provided Mesa
                  is not subject to an existing contract for such services or
                  materials.

         6.4      Consumer Price Index Adjustment.

                  6.4.1    Definition. "CPI" shall mean the Consumer Price
                           Index, U.S. City Average, Urban Wage Earners and
                           Clerical Workers, All Items (base index year 1982-84
                           = 100) as published by the United States Department
                           of Labor, Bureau of Labor Statistics. If the manner
                           in which the Consumer Price Index as determined by
                           the Bureau of Labor Statistics shall be substantially
                           revised, including, without limitation, a change in
                           the base index year, an adjustment shall be made by
                           the parties in such revised index which would produce
                           results equivalent, as nearly as possible, to those
                           which would have been obtained if such Consumer Price
                           Index had not been so revised. If the Consumer Price
                           Index shall become unavailable to the public because
                           publication is not readily available to enable the
                           parties to make the adjustment referred to in this
                           paragraph, then the parties shall mutually agree to
                           substitute therefor a comparable index based upon
                           changes in the cost of living or purchasing power of
                           the consumer dollar published by any other
                           governmental agency or, if no such index shall be
                           available, then a comparable index published by a
                           major bank or other financial institution or by a
                           university or a recognized financial publication.






                                       19



<PAGE>   20



                           6.4.2    Adjustment Formula. On each anniversary date
                                    of the Commencement Date (each an
                                    "Adjustment Date"), the [CONFIDENTIAL
                                    PORTION DELETED AND FILED SEPARATELY WITH
                                    THE SECURITIES AND EXCHANGE COMMISSION] or
                                    [CONFIDENTIAL PORTION DELETED AND FILED
                                    SEPARATELY WITH THE SECURITIES AND EXCHANGE
                                    COMMISSION]. Mesa and AWA shall execute an
                                    amendment to the Guaranteed Costs Schedule
                                    within [CONFIDENTIAL PORTION DELETED AND
                                    FILED SEPARATELY WITH THE SECURITIES AND
                                    EXCHANGE COMMISSION] after the Adjustment
                                    occurs. The failure to execute such an
                                    amendment shall not affect the effectiveness
                                    of any Adjustment or the bases for any
                                    subsequent Adjustment. The Guaranteed Costs
                                    shall be effective until the next Adjustment
                                    Date.

                  6.5      Payment of Actual and Guaranteed Costs. Commencing on
                           the Commencement Date, AWA shall pay to Mesa the
                           estimated Actual Costs and Guaranteed Costs for each
                           calendar month based on a [CONFIDENTIAL PORTION
                           DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                           EXCHANGE COMMISSION] (the "Estimated Costs") as
                           follows: By the 20th day of each calendar month
                           commencing August 20, 1998, Mesa shall provide AWA
                           with a statement of the Estimated Costs for the
                           following month. On or before the 7th, 14th, 21st and
                           28th day of each calendar month (or next business day
                           thereafter if any such dates is other than a business
                           day), AWA shall pay [CONFIDENTIAL PORTION DELETED AND
                           FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                           COMMISSION] of the Estimated Costs for such calendar
                           month.

                           On or before the 25th day of each calendar month,
                           Mesa shall submit to AWA a statement of the actual
                           Guaranteed Costs and Actual Costs (the "Incurred
                           Costs") payable by AWA for the prior calendar month
                           (the "Incurred Costs Statement"). If the Estimated
                           Costs paid by AWA in any calendar month exceed the
                           Incurred Costs in any calendar month, then Mesa,
                           together with the Incurred Costs Statement for such
                           calendar month, shall reimburse AWA the amount by
                           which the Estimated Costs paid by AWA exceeded the
                           Incurred Costs. If the Incurred Costs in any calendar
                           month exceed the Estimated Costs paid by AWA in any
                           calendar month, then AWA within [CONFIDENTIAL PORTION
                           DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                           EXCHANGE COMMISSION] after receipt of the Incurred
                           Costs Statement, shall reimburse and pay to Mesa the
                           amount by which the Incurred Costs exceed the
                           Estimated Costs paid by AWA for the subject calendar
                           month.

                  6.6      Network Revenue Sharing. Commencing in the first
                           calendar month after the month in which the
                           Commencement Date occurs, AWA shall pay to Mesa, by
                           the 20th day of each calendar month, an amount equal
                           to





                                       20



<PAGE>   21



                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION].  For purposes of this
                  Agreement, the following terms have the following definitions:

                  "Network Revenue" means the [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION].
                  For calculating Network Revenue, the [CONFIDENTIAL PORTION
                  DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION].

                  "Network Revenue Percentage" means: (i) [CONFIDENTIAL PORTION
                  DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION]; (ii) [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]; and
                  (iii) [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH
                  THE SECURITIES AND EXCHANGE COMMISSION]. The Network Revenue
                  Percentage during any calendar month in which the
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] shall be a [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION] of [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]
                  based on the number of days in effect and the number of days
                  in such calendar month.

         6.7      Cost Sharing. If the [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION] paid
                  by AWA pursuant to the Fixed Cost Schedule (excluding Mesa's
                  general overhead contained in the "Overhead" heading in the
                  Guaranteed Costs Schedule) [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]
                  in the Guaranteed Costs categories set forth in the Guaranteed
                  Cost Schedule for any calendar quarter, then Mesa, within 30
                  days after the expiration of the calendar quarter, shall pay
                  to AWA an amount equal to [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]
                  of such difference. If the [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]
                  paid by AWA pursuant to the Guaranteed Cost Schedule, then
                  AWA, within 30 days after receipt of a written statement from
                  Mesa, shall pay to Mesa an amount equal to [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION] of such overrun.

         6.8      Subsidies. Mesa, within [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]





                                       21



<PAGE>   22



                  after receipt, [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]. AWA
                  shall not be responsible to the DOT for continuing service in
                  any EAS market. Notwithstanding the foregoing, [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION], then [CONFIDENTIAL PORTION DELETED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION].

         6.9      Statements and Audit Rights. All Incurred Costs Statements and
                  other requests for payment made by Mesa pursuant to this
                  Section 6 shall be accompanied by such supporting information,
                  documentation and calculations as AWA may request from time to
                  time. AWA, upon [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION] prior
                  written notice, may review and audit, or cause its independent
                  accountants to review and audit, all records and files
                  (including computer data bases) maintained by Mesa and
                  relevant to the calculation of the payments required to be
                  made by AWA pursuant to this Agreement. If AWA's review of the
                  records and files reveals that Mesa has overcharged AWA or
                  underpaid AWA, then Mesa shall pay to AWA, upon demand, the
                  overpayments and/or underpayments and the costs and expenses
                  of AWA incurred in completing such review and audit and, if
                  such overcharge or underpayment is willful or intentional or
                  exceeds more than [CONFIDENTIAL PORTION DELETED AND FILED
                  SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION] of the
                  sums actually payable or receivable by AWA, then Mesa shall be
                  in default under this Agreement. Mesa shall maintain all
                  records, files, information, data and documentation (including
                  computer data bases) used in calculating the sums payable or
                  receivable by AWA under this Agreement in good condition and
                  order at Mesa's corporate headquarters. AWA shall not be
                  required to pay any sums, and shall be entitled to receive a
                  refund of any sum paid, for which Mesa is unable to provide
                  supporting information, documentation or data.

7.       Term and Termination. The term of this Agreement (the "Term") shall
         commence on [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
         SECURITIES AND EXCHANGE COMMISSION] (the "Commencement Date") and
         expire on [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
         SECURITIES AND EXCHANGE COMMISSION] ("Expiration Date"), unless earlier
         terminated as provided in this Agreement. AWA, by written notice to
         Mesa at least [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH
         THE SECURITIES AND EXCHANGE COMMISSION] AWA, upon [CONFIDENTIAL PORTION
         DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
         COMMISSION] prior to the Expiration Date, may extend the Expiration
         Date to [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH





                                       22



<PAGE>   23



         THE SECURITIES AND EXCHANGE COMMISSION]. AWA, upon [CONFIDENTIAL
         PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
         COMMISSION]. AWA, upon [CONFIDENTIAL PORTION DELETED AND FILED
         SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION] prior written
         notice to Mesa ("Termination Notice"), may terminate this Agreement if:
         (i) Mesa's OTP Rate falls below the [CONFIDENTIAL PORTION DELETED AND
         FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION]; or (ii)
         Mesa's FCF falls below [CONFIDENTIAL PORTION DELETED AND FILED
         SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION] for
         [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES
         AND EXCHANGE COMMISSION] (each, a "Cancellation Event"). [CONFIDENTIAL
         PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
         COMMISSION]. Such termination right shall be in addition to any penalty
         payments set forth in Section 4 and termination rights for an Event of
         Default pursuant to Section 12. If AWA elects to terminate this
         Agreement pursuant to this Section 7, AWA, in the Termination Notice,
         shall establish as the termination date any date between [CONFIDENTIAL
         PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
         COMMISSION] and [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH
         THE SECURITIES AND EXCHANGE COMMISSION] after delivery of the
         Termination Notice. Mesa shall continue to provide the Flight Services
         and Other Services required by this Agreement until the termination
         date set forth in the Termination Notice. AWA and Mesa shall make all
         payments as required by this Agreement for the period through and
         including the termination date set forth in the Termination Notice.

         Until the Commencement Date, the terms and provisions of that certain
         Agreement concerning America West Express Service Agreement, dated
         September 4, 1992, between AWA and Mesa, as amended by the following:
         Letter Agreement, dated September 3, 1993, re: America West Express
         Service Agreement; Amendment to Agreement between AWA and Mesa, dated
         March 31, 1993; Second Amendment to the Agreement between AWA and Mesa,
         dated July 31, 1993; Letter Agreement, dated October 5, 1993, re:
         America West Express Service Agreement; Third Amendment to Agreement
         between AWA and Mesa, dated October 7, 1993; Third Amendment to
         Agreement between AWA and Mesa, dated August, 1994; Letter Agreement,
         dated March 31, 1994, re: America West Express Code-Share Agreement
         Addendum; Letter Agreement, dated August 16, 1994, re: America West
         Express Code-Share Agreement Addendum; Fourth Amendment, dated October,
         1994, to the Agreement between AWA and Mesa; Letter Agreement, dated
         March 26, 1998 between AWA and Mesa, Letter Agreement, dated June 30,
         1998, between Mesa and AWA and Letter Agreement, dated July 14, 1998,
         between Mesa and AWA, shall remain in full force and effect (the
         "Existing Agreement"). The Existing Agreement shall terminate at 11:59
         p.m., Phoenix time, on the day immediately prior to the Commencement
         Date.






                                       23



<PAGE>   24



8.       Service Mark License For Services Provided By Mesa.

         8.1      Grant of License. For the payment of [CONFIDENTIAL PORTION
                  DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION], AWA hereby grants to Mesa a non-exclusive,
                  non-transferable license to use such AWA Service Marks as AWA
                  may designate, in writing, from time-to-time in connection
                  with the Flight Services and Other Services to be rendered by
                  Mesa; provided, however, that at any time prior to expiration
                  or termination of this Agreement AWA may alter, amend or
                  revoke the license hereby granted and require Mesa's use of
                  any new or different AWA Service Mark in conjunction with the
                  Services provided hereunder as AWA may determine in its sole
                  discretion and judgment.

         8.2      Operation under AWA Service Marks. Mesa shall, at its expense,
                  cause the Fleet and any replacement Aircraft utilized by Mesa
                  to provide the Flight Services, within [CONFIDENTIAL PORTION
                  DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION] after the Effective Date, to bear AWA Service
                  Marks, consisting of AWA aircraft exterior and interior color
                  decor and pattern provided by AWA and the name "America West
                  Express." Upon written notice from AWA, which shall include
                  the specifications for any such changes in AWA Service Marks
                  and exterior or interior aircraft decor and patterns, Mesa
                  shall effect changes in the aircraft decor and patterns within
                  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
                  SECURITIES AND EXCHANGE COMMISSION] from the date of such
                  notice. [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                  WITH THE SECURITIES AND EXCHANGE COMMISSION]. Mesa shall use
                  and display suitable signs on the interior and exterior of
                  each Aircraft identifying Mesa as the operator of the
                  Services, such signs shall be subject to the prior written
                  consent of AWA as to nature, size and location provided that
                  the signs shall comply with all Regulations. [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION]. All announcements, displays or
                  literature used or viewed by Mesa customers on Flights shall
                  highlight "America West Express." [CONFIDENTIAL PORTION
                  DELETED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION].

         8.3      Terms and Conditions Governing Trademark License.

                  8.3.1    Mesa hereby acknowledges AWA's ownership of the AWA
                           Service Marks, further acknowledges the validity of
                           the AWA Service Marks, and agrees that it shall not
                           do anything in any way to infringe or abridge upon
                           AWA's rights in the AWA Service Marks or directly or
                           indirectly to challenge the validity of the AWA
                           Service Marks.






                                       24



<PAGE>   25



                  8.3.2    To assure that the production appearance and quality
                           of the AWA Service Marks is consistent with AWA's
                           reputation for high quality and the goodwill
                           associated with the AWA Service Marks, Mesa agrees to
                           maintain a level of quality consistent with AWA's
                           quality in the Flight Services and Other Services it
                           provides pursuant to this Agreement and to follow
                           AWA's written instructions regarding use of AWA's
                           Service Marks, as they may be amended from time to
                           time.

                  8.3.3    Mesa agrees that, in providing the Flight Services
                           and Other Services, it shall not advertise or make
                           use of the AWA Service Marks without the prior
                           written consent of AWA. AWA shall have absolute
                           discretion to withhold its consent concerning any and
                           all such advertising and use of the AWA Service Marks
                           in any advertising by Mesa. In the event AWA approves
                           the use of such AWA Service Marks in any advertising,
                           such advertising shall identify AWA as the owner of
                           such Service Marks and conform with any additional
                           requirements specified by AWA.

                  8.3.4    To the extent that Mesa is licensed to use the AWA
                           Service Marks, the AWA Service Marks shall be used
                           only in connection with the Flight Services and Other
                           Services specifically covered by this Agreement and
                           not in connection with any other business or activity
                           of Mesa or any other entity.

                  8.3.5    Nothing in this Agreement shall be construed to give
                           Mesa the exclusive right to use the AWA Service Marks
                           or abridge AWA's right to use and license the AWA
                           Service Marks, and AWA hereby reserves the right to
                           continue to use the AWA Service Marks and to license
                           such other uses of the AWA Service Marks as AWA may
                           desire.

                  8.3.6    No term or provision of this Agreement shall be
                           construed to preclude the use of the AWA Service
                           Marks, including "America West Express," or the
                           aircraft exterior color decor and patterns by other
                           individuals or entities not covered by this
                           Agreement.

                  8.3.7    Upon the termination or expiration of this Agreement,
                           the license and use of the AWA Service Marks by Mesa
                           shall cease and such use shall not thereafter occur.

9.       Liability and Indemnification.

         9.1      Relationship Between the Parties. Nothing contained in this
                  Agreement will be deemed to create any agency or partnership
                  or similar relationship between AWA and Mesa. Nothing
                  contained in this Agreement will be deemed to authorize either
                  AWA or Mesa to bind or obligate the other. Mesa





                                       25



<PAGE>   26



                  and its employees engaged in performing the Flight Services
                  and Other Services shall be employees of Mesa for all
                  purposes, and under no circumstances shall be deemed to be
                  employees, agents or independent contractors of AWA. AWA and
                  its employees engaged in performing the obligations of AWA
                  under this Agreement shall be employees, agents and
                  independent contractors of AWA for all purposes, and under no
                  circumstances shall be deemed to be employees, agents or
                  independent contractors of Mesa. Pursuant to this Agreement,
                  Mesa shall act, for all purposes, as an independent contractor
                  and not as an agent for AWA. AWA shall have no supervisory
                  power or control over any employees engaged by Mesa in
                  connection with its performance hereunder, and all complaints
                  or requested changes in procedures shall be transmitted by AWA
                  to a designated officer of Mesa. Nothing contained in this
                  Agreement shall be intended to limit or condition Mesa's
                  control over its operations or the conduct of its business as
                  an air carrier, and Mesa and its principals assume all risks
                  of financial losses which may result form the operation of the
                  Flight Services and Other Services to be provided by Mesa
                  hereunder.

         9.2      Indemnification by Mesa. Mesa agrees to indemnify, defend and
                  hold harmless AWA, its directors, officers, employees, agents,
                  parent corporation, subsidiaries and affiliates for, from and
                  against any and all loss, liability, claim, damage, penalty,
                  fine, charge, cause of action, demand, cost and expense
                  (including attorneys' and consultants' fees and costs)
                  whatsoever (collectively, "Damages"), as incurred, arising out
                  of, resulting from or incurred in connection with: (i) the
                  provision of the Flight Services and Other Services by Mesa;
                  (ii) Mesa's breach of this Agreement; (iii) damage or
                  destruction of property of any person, or injury or death of
                  any person, caused by, arising out of, or in connection with
                  any act or omission of Mesa, its employees, agents, licensees,
                  contractors, suppliers, officers or directors; (iv) any taxes,
                  impositions, assessments or other governmental charges
                  incurred by Mesa in providing the Flight Services or Other
                  Services or imposed on any revenue generated by this Agreement
                  (except as set forth in Section 6.1.3); (v) passenger
                  complaints or claims by passengers using the Flight Services;
                  (vi) the failure or discontinuance of service to any EAS
                  Market (except as specified in Section 6.7); and (vii) failure
                  to comply with any Regulations. Mesa shall reimburse AWA or
                  other Indemnified Party (as defined below) for any legal and
                  any other expenses reasonably incurred in investigating,
                  preparing or defending against any claim or action arising out
                  of or relating to any of the foregoing.

         9.3      Indemnification by AWA. AWA agrees to indemnify, defend and
                  hold harmless Mesa, its directors, officers, employees,
                  agents, parent corporation, subsidiaries and affiliates for,
                  from and against any and all Damages, as incurred, arising out
                  of, resulting from or incurred in connection with: (i) AWA's
                  breach of this Agreement; (ii) damage or destruction of
                  property of any person, or injury or death of any person,
                  caused by, arising out of, or in





                                       26



<PAGE>   27



                  connection with any act or omission of AWA, its employees,
                  agents, licensees, contractors, suppliers, officers or
                  directors in performing AWA's obligations under this
                  Agreement; and (iii) any taxes, impositions, assessments or
                  other governmental charges incurred by AWA for revenue
                  received by AWA under this Agreement. AWA shall reimburse Mesa
                  or other Indemnified Party (as defined below) for any legal
                  and any other expenses reasonably incurred in investigating,
                  preparing or defending against any claim or action arising out
                  of or relating to any of the foregoing.

         9.4      Conduct of Indemnification Proceedings. The person or entity
                  claiming indemnification hereunder is referred to as the
                  "Indemnified Party" and the party against whom such claims are
                  asserted hereunder is referred to as the "Indemnifying Party".
                  Each Indemnified Party shall give reasonably prompt notice to
                  the Indemnifying Party of any action or proceeding or
                  assertion or threat of claim commenced against it in respect
                  of which indemnity may be sought hereunder, but failure to so
                  notify the Indemnifying Party (i) shall not relieve the
                  Indemnifying Party from any liability which it may have under
                  the indemnity agreement provided in this Agreement, unless and
                  to the extent it did not otherwise learn of such action,
                  threat or claim and the lack of notice by the Indemnified
                  Party results in the forfeiture by the Indemnifying Party of
                  substantial rights and defenses and (ii) shall not, in any
                  event, relieve the Indemnifying Party from any obligations to
                  the Indemnified Party other than the indemnification
                  obligation provided under Sections 9.2 and 9.3 above. If the
                  Indemnifying Party elects within a reasonable time after
                  receipt of notice, the Indemnifying Party may assume the
                  defense of the action or proceeding at Indemnifying Party's
                  own expense with counsel chosen by the Indemnifying Party and
                  approved by the Indemnified Party; provided, however, that, if
                  the Indemnified Party reasonably determines upon advice of
                  counsel that a conflict of interest exists where it is
                  advisable for the Indemnified Party to be represented by
                  separate counsel or that, upon advice of counsel, there may be
                  legal defenses available to it which are different from or in
                  addition to those available to the Indemnifying Party, then
                  the Indemnified Party shall be entitled to separate counsel at
                  the Indemnifying Party's expense, which counsel shall be
                  chosen by the Indemnified Party in its sole discretion. If the
                  Indemnifying Party does not assume the defense, after having
                  received the notice referred to in the second sentence of this
                  paragraph, the Indemnifying Party will pay the reasonable fees
                  and expenses of counsel for the Indemnified Party. Unless and
                  until a final judgment that an Indemnified Party is not
                  entitled to the costs of defense under the foregoing
                  provision, the Indemnifying Party shall reimburse, promptly as
                  they are incurred, the Indemnified Party's costs of defense.
                  The Indemnifying Party shall not settle or compromise any
                  claim for which an Indemnified Party is entitled to indemnity
                  without the prior written consent of the Indemnified Party.






                                       27



<PAGE>   28



         9.5      Insurance.

                  9.5.1    Mesa, at all times during the Agreement, shall have
                           and maintain in full force and effect, policies of
                           insurance satisfactory to AWA, of the types of
                           coverage, and in the minimum amounts stated below
                           with insurance companies satisfactory to AWA and
                           under terms and conditions satisfactory to AWA,
                           including insurance coverage on all Aircraft used to
                           provide Flight Services. Unless otherwise specified,
                           the minimum amounts of insurance coverage required
                           hereunder shall be per occurrence, combined single
                           limit for all insurance coverage required hereunder.

<TABLE>
<S>                                                         <C>
                           1.   Aircraft Liability          [CONFIDENTIAL
                                and Ground Liability        PORTION DELETED AND
                                Insurance (including        FILED SEPARATELY
                                Commercial General          WITH THE SECURITIES AND
                                Liability)                  EXCHANGE COMMISSION] per
                                                            Occurrence Combined Single
                                                            Limit of Liability for CRJs
                                                            and commencing September
                                                            15, 1998, for Dash 8s and
                                                            [CONFIDENTIAL PORTION
                                                            DELETED AND FILED
                                                            SEPARATELY WITH THE
                                                            SECURITIES AND EXCHANGE
                                                            COMMISSION] per Occurrence
                                                            Combined Single Limit of
                                                            Liability for Beech 1900s
                                a.  Bodily Injury and       [CONFIDENTIAL
                                    Personal Injury -       PORTION DELETED AND
                                    Passengers              FILED SEPARATELY
                                                            WITH THE SECURITIES
                                                            AND EXCHANGE
                                                            COMMISSION]
                                b.  Bodily Injury and       [CONFIDENTIAL
                                    Personal Injury -       PORTION DELETED AND
                                    Third Parties           FILED SEPARATELY
                                                            WITH THE SECURITIES
                                                            AND EXCHANGE
                                                            COMMISSION]
</TABLE>





                                       28



<PAGE>   29


<TABLE>
<S>                                                         <C>
                                c.  Property Damage         [CONFIDENTIAL
                                                            PORTION DELETED AND
                                                            FILED SEPARATELY
                                                            WITH THE SECURITIES
                                                            AND EXCHANGE
                                                            COMMISSION]
                                                            Per Accident
                                                     
                           2.   Worker's Compensation       Statutory
                                Insurance (Company
                                Employees)
                           3.   Employers' Liability        [CONFIDENTIAL
                                (Company Employees)         PORTION DELETED AND
                                                            FILED SEPARATELY
                                                            WITH THE SECURITIES
                                                            AND EXCHANGE
                                                            COMMISSION]
                           4.   All Risk Hull               [CONFIDENTIAL
                                Insurance on Aircraft       PORTION DELETED AND
                                Performing Services         FILED SEPARATELY
                                Hereunder                   WITH THE SECURITIES
                                                            AND EXCHANGE
                                                            COMMISSION]
                           5.   Baggage Liability           [CONFIDENTIAL
                                                            PORTION DELETED AND
                                                            FILED SEPARATELY
                                                            WITH THE SECURITIES
                                                            AND EXCHANGE
                                                            COMMISSION]
                           6.   Cargo Liability             [CONFIDENTIAL
                                                            PORTION DELETED AND
                                                            FILED SEPARATELY
                                                            WITH THE SECURITIES
                                                            AND EXCHANGE
                                                            COMMISSION]

                                                            [CONFIDENTIAL
                                                            PORTION DELETED AND
                                                            FILED SEPARATELY
                                                            WITH THE SECURITIES
                                                            AND EXCHANGE
                                                            COMMISSION]
</TABLE>
                  9.5.2    The parties hereby agree that from time to time
                           during the Term of this Agreement, AWA may require
                           Mesa to have and maintain amounts of insurance
                           coverage different from those amounts set forth




                                       29



<PAGE>   30



                           in Section 9.5.1, should AWA, in its reasonable
                           judgment, deem the circumstances and conditions of
                           the Flight Services and Other Services to require
                           increases in any or all of the foregoing minimum
                           insurance coverages.

                  9.5.3    Mesa shall cause all policies of insurance which it
                           maintains pursuant to this Agreement, to be duly and
                           properly endorsed by Mesa's insurance underwriters as
                           follows:

                           9.5.3.1          To provide that any waiver of rights
                                            of subrogation against other parties
                                            by Mesa shall not affect the
                                            coverage provided hereunder with
                                            respect to AWA.

                           9.5.3.2          To provide that Mesa's underwriters
                                            shall waive any and all subrogation
                                            rights against AWA, its directors,
                                            officers, agents and employees
                                            without regard to any breach of
                                            warranty by Mesa or to provide other
                                            evidence of such waiver of recourse
                                            against AWA, its directors,
                                            officers, agents, or employees as
                                            shall be acceptable to AWA.

                           9.5.3.3          Be duly and properly endorsed to
                                            provide that each such policy or
                                            policies or any part or parts
                                            thereof shall not be canceled,
                                            terminated, or materially altered,
                                            changed or amended by Mesa's
                                            insurance underwriters, until after
                                            [CONFIDENTIAL PORTION DELETED AND
                                            FILED SEPARATELY WITH THE SECURITIES
                                            AND EXCHANGE COMMISSION] written
                                            notice to AWA which [CONFIDENTIAL
                                            PORTION DELETED AND FILED SEPARATELY
                                            WITH THE SECURITIES AND EXCHANGE
                                            COMMISSION] written notice shall
                                            commence to run from the date such
                                            notice is actually received by AWA.

                  9.5.4    With respect to policies of insurance described as
                           Aircraft Liability and Ground Liability Insurance,
                           Mesa will provide that such policies:

                           9.5.4.1          Endorse AWA, its directors,
                                            officers, agents, parents,
                                            subsidiaries and employees as
                                            Additional Insureds thereunder.

                           9.5.4.2          Constitute primary insurance for
                                            such claims and acknowledge that any
                                            other insurance policy or policies
                                            of AWA will be secondary or excess
                                            insurance;






                                       30



<PAGE>   31



                           9.5.4.3          Cover AWA's [CONFIDENTIAL PORTION
                                            DELETED AND FILED SEPARATELY WITH
                                            THE SECURITIES AND EXCHANGE
                                            COMMISSION] including, without
                                            limitation, [CONFIDENTIAL PORTION
                                            DELETED AND FILED SEPARATELY WITH
                                            THE SECURITIES AND EXCHANGE
                                            COMMISSION]; and

                           9.5.4.4          Provide a [CONFIDENTIAL PORTION
                                            DELETED AND FILED SEPARATELY WITH
                                            THE SECURITIES AND EXCHANGE
                                            COMMISSION], and a [CONFIDENTIAL
                                            PORTION DELETED AND FILED SEPARATELY
                                            WITH THE SECURITIES AND EXCHANGE
                                            COMMISSION] assumed by Mesa under
                                            this Agreement.

                  9.5.5      With respect to policies of insurance for coverage
                             described as Aircraft Liability and General
                             Liability Insurance and All Risk Hull Insurance,
                             Mesa shall cause its insurance underwriters to
                             provide a breach of warranty clause.

                  9.5.6      All aircraft hull insurance provided pursuant to
                             this Agreement shall be provided on [CONFIDENTIAL
                             PORTION DELETED AND FILED SEPARATELY WITH THE
                             SECURITIES AND EXCHANGE COMMISSION] and, except
                             with the consent of AWA, shall not be subject to
                             more than the standard market deductibles. In the
                             event of loss, settled on the basis of a total
                             loss, all losses shall be payable in full.

                  9.5.7      Upon the Commencement Date and from time to time
                             thereafter upon request by AWA, Mesa shall furnish
                             to AWA evidence satisfactory to AWA of the
                             aforesaid insurance coverage and endorsements,
                             including certificates certifying that the
                             aforesaid insurance policy or policies with the
                             aforesaid policy limits are duly and properly
                             endorsed as aforesaid and are in full force and
                             effect.

                  9.5.8      With respect to policies of insurance obtained
                             directly from foreign underwriters, Mesa shall
                             cause such insurance underwriters to provide that
                             AWA may maintain against Mesa's underwriters a
                             direct action in the United States upon such
                             insurance policies and to this end to provide a
                             standard service of suit clause designating an
                             agent for service of process in the United States
                             of America.

                  9.5.9      In the event Mesa fails to maintain in full force
                             and effect any of the insurance and endorsements
                             described in Section 9.5, AWA shall have the right
                             (but not the obligation) to procure and maintain
                             such insurance or any part thereof. The cost of
                             such insurance shall be payable by Mesa to AWA upon
                             demand by AWA. The procurement





                                       31



<PAGE>   32



                             of such insurance or any part thereof by AWA shall
                             not discharge or excuse Mesa's obligation to comply
                             with the provisions of Section 9.5. Mesa agrees not
                             to cancel, terminate or materially alter, change or
                             amend any of the policies referred to in Section
                             9.5 without [CONFIDENTIAL PORTION DELETED AND FILED
                             SEPARATELY WITH THE SECURITIES AND EXCHANGE
                             COMMISSION] prior written notice to AWA of its
                             intent to cancel, terminate or materially alter,
                             change or amend said policies or insurance which
                             [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                             WITH THE SECURITIES AND EXCHANGE COMMISSION] notice
                             period shall commence to run from the date notice
                             is actually received by AWA.

                  9.5.10     AWA shall maintain cargo liability coverage, in
                             types and amounts required by law, for all air
                             freight transported by Mesa under an AWA airbill on
                             any Flights.

10.      Confidentiality.

         10.1     AWA and Mesa agree that the terms of this Agreement shall be
                  treated as confidential and shall not be disclosed to third
                  parties without the express written consent of AWA and Mesa,
                  or as required by law. In the event of disclosure required by
                  law, only those portions of this Agreement required to be
                  disclosed shall be disclosed. The disclosing party shall make
                  good faith efforts to minimize the portions to be disclosed
                  and shall seek confidential treatment by the receiving party
                  or agency for any portions disclosed. In the event of one
                  party being served a subpoena or discovery request, prior to
                  responding to the subpoena or request, the party served shall
                  notify the other party to provide the other party an
                  opportunity to contest the disclosure of any terms of this
                  Agreement.

         10.2     "Confidential Information" means any information in any form,
                  including, without limitation, the terms of this Agreement,
                  written documents, oral communications, recordings, videos,
                  software, data bases, business plans, and electronic and
                  magnetic media, provided to or observed by AWA or Mesa
                  pursuant to this Agreement, including information owned or
                  provided by either party to the other party, except for
                  information generally available to the public. AWA and Mesa
                  agree that they shall maintain all Confidential Information in
                  confidence and use such Confidential Information solely for
                  purposes of performance under this Agreement. Such
                  Confidential Information shall be distributed within each
                  party's company only to personnel and to its legal counsel,
                  auditors and other consultants on a need-to-know basis for
                  purposes related to this Agreement or in compliance with a
                  court order or statutory or regulatory requirements. Except
                  for legal counsel and auditors, and as permitted by Section
                  10.1, in no event shall either party disclose Confidential
                  Information to any third parties except





                                       32



<PAGE>   33



                  subcontractors and independent consultants and then only if
                  approved by both parties in writing in advance of such
                  disclosure. Confidential Information does not include
                  information that is available to the general public other than
                  as a result of disclosure by the disclosing party or
                  information that was known or independently developed by the
                  receiving party prior to disclosure, as evidenced by records
                  kept in the ordinary course of business.

         10.3     Mesa acknowledges and agrees that any Confidential Information
                  shared or given to AWA pursuant to this Agreement may be
                  shared by AWA on a confidential basis with America West
                  Holdings Corporation, The Leisure Company and other
                  subsidiaries and affiliates of AWA. AWA acknowledges and
                  agrees that any Confidential Information shared or given to
                  Mesa pursuant to this Agreement may be shared by Mesa on a
                  confidential basis with Mesa Air Group, Inc. and other
                  subsidiaries or affiliates of Mesa.

11.      Taxes.  [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH
         THE SECURITIES AND EXCHANGE COMMISSION] shall pay, prior to
         delinquency, all airport, property, sales, use, excise or any other
         taxes, impositions, assessments or other governmental charges incurred
         in connection with the provision of the Flight Services and Other
         Services under this Agreement and all taxes imposed or any sums paid by
         [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES
         AND EXCHANGE COMMISSION] to [CONFIDENTIAL PORTION DELETED AND FILED
         SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION] under this
         Agreement. [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE
         SECURITIES AND EXCHANGE COMMISSION] shall pay, prior to delinquency,
         all taxes imposed on any sums paid by [CONFIDENTIAL PORTION DELETED AND
         FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION] to
         [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES
         AND EXCHANGE COMMISSION] under this Agreement.

12.      Defaults and Remedies.

         12.1     Default by Mesa. The occurrence of any one or more of the
                  following events shall constitute a material default and
                  breach of this Agreement by Mesa (an "Event of Default"):

                  12.1.1     The failure of Mesa to make any payment required to
                             be made by Mesa to AWA hereunder, as and when due,
                             and such failure continues for [CONFIDENTIAL
                             PORTION DELETED AND FILED SEPARATELY WITH THE
                             SECURITIES AND EXCHANGE
                             COMMISSION];

                  12.1.2     If Mesa is required by the FAA or DOT to suspend a
                             substantial portion of its operations for any
                             safety reason and has not resumed





                                       33



<PAGE>   34



                             such operation within [CONFIDENTIAL PORTION DELETED
                             AND FILED SEPARATELY WITH THE SECURITIES AND
                             EXCHANGE COMMISSION] of the suspension or if Mesa
                             [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                             WITH THE SECURITIES AND EXCHANGE COMMISSION] of the
                             Flight Services for any other reason, except as a
                             result of an emergency airworthiness directive from
                             the FAA affecting all aircraft similarly equipped
                             to the Aircraft (not just those owned or operated
                             by Mesa);

                  12.1.3     The failure of Mesa to observe or perform any of
                             the covenants, conditions or provisions of this
                             Agreement to be observed or performed by Mesa,
                             other than as described in Sections 7 or 12.1.1 or
                             12.1.2 above, and such failure shall continue for a
                             period of 15 days after written notice thereof from
                             AWA to Mesa;

                  12.1.4     (i) the cessation of Mesa's business operations as
                             a going concern; (ii) the making of Mesa of any
                             general assignment, or general arrangement for the
                             benefit of creditors; (iii) the failure of Mesa to
                             generally pay Mesa's debts as they come due or
                             Mesa's written admission of its inability to pay
                             its debts as they come due; (iv) the filing by or
                             against Mesa of a petition to have Mesa adjudged
                             bankrupt or a petition for reorganization or
                             arrangement under any law relating to bankruptcy
                             (unless, in the case of petition filed against
                             Mesa, the same is dismissed, stayed or vacated
                             within 60 days); (v) an adjudication of Mesa's
                             insolvency; (vi) appointment of a trustee or
                             receiver to take possession of substantially all of
                             Mesa's assets which is not dismissed, stayed or
                             vacated within 60 days; or (vii) the attachment,
                             execution or other judicial seizure of all of
                             Mesa's assets.

                  12.1.5     Upon an Event of Default, AWA may: (a) by written
                             notice to Mesa (a "Default Termination Notice")
                             terminate this Agreement effective as of the date
                             set forth in the Default Termination Notice which
                             date [CONFIDENTIAL PORTION DELETED AND FILED
                             SEPARATELY WITH THE SECURITIES AND EXCHANGE
                             COMMISSION] not be [CONFIDENTIAL PORTION DELETED
                             AND FILED SEPARATELY WITH THE SECURITIES AND
                             EXCHANGE COMMISSION] unless the event in 12.1.2
                             occurs, [CONFIDENTIAL PORTION DELETED AND FILED
                             SEPARATELY WITH THE SECURITIES AND EXCHANGE
                             COMMISSION]; and/or (b) pursue all other rights and
                             remedies available at law or in equity to AWA for
                             the Event of Default, including, without
                             limitation, injunctive relief, specific performance
                             and damages. After receipt of a Default Termination
                             Notice, Mesa shall continue to provide the Flight
                             Services and Other Services in accordance with this
                             Agreement until the termination date set forth in
                             the Default Termination Notice. No remedy or





                                       34



<PAGE>   35



                             election by AWA hereunder shall be deemed
                             exclusive, but shall, wherever possible, be
                             cumulative with all other rights and remedies at
                             law or in equity.

         12.2     AWA Default. The occurrence of any one or more of the
                  following events shall constitute a material default and
                  breach of this Agreement by AWA (an "AWA Event of Default"):

                  12.2.1     The failure of AWA to make any payment required to
                             be made to Mesa by AWA hereunder, as and when due,
                             and such failure continues for [CONFIDENTIAL
                             PORTION DELETED AND FILED SEPARATELY WITH THE
                             SECURITIES AND EXCHANGE
                             COMMISSION];

                  12.2.2     The failure of AWA to observe or perform any of the
                             covenants, conditions or provisions of this
                             Agreement to be observed or performed by AWA, and
                             such failure shall continue for a period of
                             [CONFIDENTIAL PORTION DELETED AND FILED SEPARATELY
                             WITH THE SECURITIES AND EXCHANGE COMMISSION] after
                             written notice thereof from Mesa to AWA;

                  12.2.3     (i) the cessation of AWA's business operations as a
                             going concern; (ii) the making of AWA of any
                             general assignment, or general arrangement for the
                             benefit of creditors; (iii) the failure of AWA to
                             generally pay AWA's debts as they come due or AWA's
                             written admission of its inability to pay its debts
                             as they come due; (iv) the filing by or against AWA
                             of a petition to have AWA adjudged bankrupt or a
                             petition for reorganization or arrangement under
                             any law relating to bankruptcy (unless, in the case
                             of petition filed against AWA, the same is
                             dismissed, stayed or vacated within 60 days); (v)
                             an adjudication of AWA's insolvency; (vi)
                             appointment of a trustee or receiver to take
                             possession of substantially all of AWA's assets
                             which is not dismissed, stayed or vacated within 60
                             days; or (vii) the attachment, execution or other
                             judicial seizure of all of AWA's assets which is
                             not dismissed, stayed or vacated within 60 days.

                  12.2.4     Upon the occurrence and continuance of an AWA Event
                             of Default, Mesa may: (a) by written notice to AWA
                             (an "AWA Default Notice") terminate this Agreement
                             effective as of the date set forth in the AWA
                             Default Notice which [CONFIDENTIAL PORTION DELETED
                             AND FILED SEPARATELY WITH THE SECURITIES AND
                             EXCHANGE COMMISSION] Event of Default; and/or (b)
                             pursue all other rights and remedies available at
                             law or in equity to Mesa for the AWA Event of
                             Default, including, without limitation, injunctive
                             relief, specific performance and damages. After
                             receipt of an AWA





                                       35



<PAGE>   36



                             Default Notice, AWA shall continue to perform its
                             obligations under this Agreement until the
                             termination date set forth in the AWA Default
                             Notice. No remedy or election by Mesa hereunder
                             shall be deemed exclusive, but shall, wherever
                             possible, be cumulative with all other rights and
                             remedies at law or in equity.

13.      Records and Reports.

         13.1     Retention of Records. Mesa shall keep accurate and complete
                  books and records of all Flight Services and Other Services
                  performed under this Agreement as well as any additional
                  records that the parties agree may be required in accordance
                  with AWA's procedures and the Regulations. Mesa shall retain
                  such records in accordance with applicable law, AWA's
                  procedures and the Regulations.

         13.2     Provision of Financial Records. Upon AWA's request, and until
                  such time as AWA advises Mesa that such reports are no longer
                  necessary, Mesa shall furnish to AWA, within [CONFIDENTIAL
                  PORTION DELETED AND FILED SEPARATELY WITH THE SECURITIES AND
                  EXCHANGE COMMISSION] following the close of the first three
                  fiscal quarters of Mesa, unaudited financial statements
                  including Mesa's current corporate balance sheets and profit
                  and loss statements, and within [CONFIDENTIAL PORTION DELETED
                  AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                  COMMISSION] after the close of its fiscal year, Mesa shall
                  furnish AWA with audited financial statements of Mesa (or its
                  parent company) including, either separately or on a
                  consolidated basis, the balance sheet and profit and loss
                  statements of that party. The appropriate reports filed on
                  Form 10-Q and 10-K shall be satisfactory to fulfill such
                  obligation.

         13.3     Provision of Additional Records. Mesa shall promptly furnish
                  AWA with a copy of every report that it prepares and is
                  required to submit to the DOT, FAA, National Transportation
                  Safety Board ("NTSB") or any other governmental agency,
                  relating to any accident or incident involving an Aircraft
                  used in performing Flight Services under this Agreement, when
                  such accident or incident is claimed to have resulted in the
                  death of or substantial injury to any person or the loss of,
                  damage to, or destruction of any property.

         13.4     Additional Reports. Mesa shall promptly notify AWA in writing
                  of (i) any change in or relinquishment of control of Mesa,
                  (ii) any agreement contemplating such a change or
                  relinquishment with a copy of such agreement, if in writing,
                  to AWA, or (iii) any change or contemplated change in the
                  Chief Executive Officer position Mesa.






                                       36



<PAGE>   37



14.      Miscellaneous Provisions.

         14.1     Notices. All notices, consents, approvals or other instruments
                  required or permitted to be given by either party pursuant to
                  this Agreement shall be in writing and given by (i) hand
                  delivery, (ii) facsimile, (iii) express overnight delivery
                  service or (iv) certified or registered mail, return receipt
                  requested. Notices shall be provided to the parties and
                  addresses (or facsimile numbers, as applicable) specified
                  below and shall be effective upon receipt, except if delivered
                  by facsimile outside of business hours in which case they
                  shall be effective on the next succeeding business day:

                  If to AWA:                America West Airlines, Inc.
                                            4000 E. Sky Harbor Blvd.
                                            Phoenix, Arizona 85034
                                            Attn:  Vice President and 
                                                   General Counsel
                                            Telephone:        (602) 693-5805
                                            Facsimile:        (602) 693-5932

                  If to Mesa:               Mesa Air Group
                                            2325 East 30th Street
                                            Farmington, New Mexico  87401
                                            Attn:  General Counsel
                                            Telephone:        (505) 326-4410
                                            Facsimile:        (505) 326-4485

         14.2     Waiver and Amendment. No provisions of this Agreement shall be
                  deemed waived or amended except by a written instrument
                  unambiguously setting forth the matter waived or amended and
                  signed by the party against which enforcement of such waiver
                  or amendment is sought. Waiver of any matter shall not be
                  deemed a waiver of the same or any other matter on any future
                  occasion.

         14.3     Captions. Captions are used throughout this Agreement for
                  convenience of reference only and shall not be considered in
                  any manner in the construction or interpretation hereof.

         14.4     Attorneys' Fees. In the event of any judicial or other
                  adversarial proceeding between the parties concerning this
                  Agreement, the prevailing party shall be entitled to recover
                  its attorneys' fees and other costs in addition to any other
                  relief to which it may be entitled.

         14.5     Entire Agreement. This Agreement constitutes the entire
                  agreement between the parties with respect to the subject
                  matter hereof, and there are no other representations,
                  warranties or agreements, written or oral, between AWA and
                  Mesa with respect to the subject matter of this Agreement.






                                       37



<PAGE>   38



         14.6     Jurisdiction; Choice of Law. For purposes of any action or
                  proceeding arising out of this Agreement, the parties hereto
                  hereby expressly submit to the jurisdiction of all federal and
                  state courts located in the State of Arizona. This Agreement
                  shall be governed by and construed in accordance with the laws
                  of the State of Arizona.

         14.7     Severability. If this Agreement, any one or more of the
                  provisions of this Agreement, or the applicability of this
                  Agreement or any one or more of the provisions of this
                  Agreement to a specific situation, shall be held invalid,
                  illegal or unenforceable or in violation of any contract or
                  agreement to which Mesa or AWA are a party, then AWA and Mesa
                  shall in good faith amend and modify this Agreement,
                  consistent with the intent of Mesa and AWA, as evidenced by
                  this Agreement, to the minimum extent necessary to make it or
                  its application valid, legal and enforceable and in accordance
                  with the applicable agreement or contract, and the validity or
                  enforceability of all other provisions of this Agreement and
                  all other applications of any such provision shall not be
                  affected thereby.

         14.8     Counterparts. This Agreement may be executed in one or more
                  counterparts, each of which shall be deemed an original.

         14.9     Binding Effect. This Agreement shall be binding upon and inure
                  to the benefit of AWA and Mesa and their respective successors
                  and permitted assigns.

         14.10    No Assignment. The rights, obligations and duties of AWA and
                  Mesa under this Agreement may not be assigned or delegated,
                  except as may otherwise be mutually agreed by AWA and Mesa,
                  in their sole and absolute discretion.


                                  AWA:                                         
                                                                               
                                  America West Airlines, Inc.,                 
                                  a Delaware corporation                       
                                                                               
                                                                               
                                                                               
                                  By: /s/  J. Scott Kirby                      
                                     ------------------------------------------
                                  Name:  J. Scott Kirby                        
                                  Title: Vice President, Revenue Management
                                  





                                       38



<PAGE>   39




                                  MESA:                                    
                                                                           
                                                                           
                                  Mesa Airlines, Inc.,                     
                                  a Nevada corporation                     
                                                                           
                                                                           
                                                                           
                                  By:   /s/ Jonathan G. Ornstein           
                                     --------------------------------------
                                  Name:      Jonathan G. Ornstein          
                                  Title:     Chief Executive Officer       
                                  





                                       39


<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
CONDENSED FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          SEP-30-1998
<PERIOD-START>                             OCT-01-1997
<PERIOD-END>                               JUN-30-1998
<CASH>                                          50,416
<SECURITIES>                                         0
<RECEIVABLES>                                   30,226
<ALLOWANCES>                                         0
<INVENTORY>                                     34,463
<CURRENT-ASSETS>                               134,011
<PP&E>                                         413,555
<DEPRECIATION>                                (78,593)
<TOTAL-ASSETS>                                 507,222
<CURRENT-LIABILITIES>                           83,707
<BONDS>                                        245,857
                                0
                                          0
<COMMON>                                       101,836
<OTHER-SE>                                      15,975
<TOTAL-LIABILITY-AND-EQUITY>                   507,222
<SALES>                                        334,456
<TOTAL-REVENUES>                               343,715
<CGS>                                                0
<TOTAL-COSTS>                                  391,027
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              18,233
<INCOME-PRETAX>                               (59,222)
<INCOME-TAX>                                   (2,511)
<INCOME-CONTINUING>                           (56,711)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (56,711)
<EPS-PRIMARY>                                   (2.00)
<EPS-DILUTED>                                   (2.00)
        

</TABLE>


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