<PAGE>   1
                                  UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D. C. 20549

                                    FORM 10-Q


[X]    Quarterly Report Pursuant to Section 13 or 15(d) of the Securities
       Exchange Act of 1934 for the quarterly period ended December 30, 2000.

[ ]    Transition Report pursuant to Section 13 or 15(d) of the Securities
       Exchange Act of 1934

For the transition period from ________________________ to _____________________

Commission File Number                      333-71397
                      ----------------------------------------------------------

TransDigm Inc., TransDigm Holding Company, Marathon Power Technologies Company,
--------------------------------------------------------------------------------
ZMP, Inc. and Adams Rite Aerospace, Inc.
--------------------------------------------------------------------------------
    (Exact name of co-registrants as specified in their respective charters)

         Delaware                                       13-3733378
--------------------------------------------------------------------------------
(State or other Jurisdiction of             (I.R.S. Employer Identification No.)
incorporation or organization)

26380 Curtiss Wright Parkway, Richmond Heights, Ohio        44143
--------------------------------------------------------------------------------
(Address of principal executive offices)                  (Zip Code)

                                 (216) 289-4939
--------------------------------------------------------------------------------
              (Registrant's telephone number, including area code)

--------------------------------------------------------------------------------
(Former name, former address and former fiscal year, if changed since last
report.)

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
                                           ---       ---

Indicate the number of shares outstanding of each of the issuer's classes of
common stock, as of the latest practicable date.

<TABLE>

<S>                                                           <C>
Common Stock (Voting) of TransDigm Holding Company,
  $0.01 Par Value                                                            119,824
---------------------------------------------------           ----------------------------------
                     (Class)                                  (Outstanding at December 30, 2000)

Class A Common Stock (Non-Voting) of
  TransDigm Holding Company, $0.01 Par Value                                 -0-
---------------------------------------------------           ----------------------------------
                     (Class)                                  (Outstanding at December 30, 2000)
</TABLE>

All of the outstanding capital stock of TransDigm Inc. is held by TransDigm
Holding Company.

<PAGE>   2

                                      INDEX

<TABLE>
<CAPTION>

                                                                                        Page
<S>               <C>                                                                 <C>
Part I            Financial Information

       Item 1     Financial Statements

                  Consolidated Balance Sheets - December 30, 2000 and
                  September 30, 2000                                                      1

                  Consolidated Statements of Income - Thirteen Weeks
                  Ended December 30, 2000 and December 31, 1999                           2

                  Consolidated Statement of Changes in Stockholders' Deficiency -
                  Thirteen Weeks Ended December 30, 2000                                  3

                  Consolidated Statements of Cash Flows -
                  Thirteen Weeks Ended December 30, 2000 and December 31, 1999            4

                  Notes to Consolidated Financial Statements                              5

       Item 2     Management's Discussion and Analysis of Financial Condition
                  and Results of Operations                                               7

       Item 3     Quantitative and Qualitative Disclosure About Market Risk              10

Part II:          Other Information

       Item 6     Exhibits and Reports on Form 8-K                                       11

Signatures                                                                               12
</TABLE>
<PAGE>   3
<TABLE>
<CAPTION>


PART I:  FINANCIAL INFORMATION
ITEM 1

TRANSDIGM HOLDING COMPANY

CONSOLIDATED BALANCE SHEETS
(IN THOUSANDS OF DOLLARS)
(UNAUDITED)
------------------------------------------------------------------------------------

                                                       DECEMBER 30,   SEPTEMBER 30,
                                                          2000            2000
<S>                                                    <C>            <C>
ASSETS

CURRENT ASSETS:
  Cash and cash equivalents                            $   4,739      $   4,309
  Accounts receivable, net                                22,601         26,796
  Inventories                                             39,220         32,889
  Income taxes refundable                                    389          1,796
  Deferred income taxes                                    5,657          5,657
  Prepaid expenses and other                                 475            535
                                                        --------       --------
           Total current assets                           73,081         71,982

PROPERTY, PLANT AND EQUIPMENT - Net                       24,574         25,029

INTANGIBLE ASSETS - Net                                   56,498         56,957

DEBT ISSUE COSTS - Net                                     8,998          9,400

DEFERRED INCOME TAXES AND OTHER                            5,342          5,465
                                                        --------       --------
TOTAL                                                  $ 168,493      $ 168,833
                                                        ========       ========

LIABILITIES AND STOCKHOLDERS' DEFICIENCY

CURRENT LIABILITIES:
  Current portion of long-term debt                    $  10,953      $  10,953
  Accounts payable                                        10,125          5,672
  Accrued liabilities                                     10,947         15,460
                                                        --------       --------
           Total current liabilities                      32,025         32,085

LONG-TERM DEBT - Less current portion                    248,604        250,648

NON-CURRENT PORTION OF ACCRUED PENSION
  COSTS AND OTHER                                          2,898          3,138
                                                        --------       --------
           Total liabilities                             283,527        285,871

REDEEMABLE COMMON STOCK                                    1,627          1,371
                                                        --------       --------
STOCKHOLDERS' DEFICIENCY:
  Common stock                                           102,156        102,156
  Retained deficit                                      (218,385)      (220,115)
  Accumulated other comprehensive loss                      (432)          (450)
                                                        --------       --------
           Total stockholders' deficiency               (116,661)      (118,409)
                                                        --------       --------

TOTAL                                                 $  168,493      $ 168,833
                                                        ========       ========
</TABLE>

See notes to consolidated financial statements.


                                      -1-
<PAGE>   4

TRANSDIGM HOLDING COMPANY

CONSOLIDATED STATEMENTS OF INCOME
(IN THOUSANDS OF DOLLARS)
(UNAUDITED)
--------------------------------------------------------------------------------


                                                      THIRTEEN WEEKS ENDED
                                                   ----------------------------
                                                   DECEMBER 30,    DECEMBER 31,
                                                      2000             1999


NET SALES                                            $35,780        $33,734

COST OF SALES                                         19,993         18,135
                                                     -------        -------

GROSS PROFIT                                          15,787         15,599
                                                     -------        -------

OPERATING EXPENSES:
  Selling and administrative                           4,256          4,132
  Amortization of intangibles                            419            512
  Research and development                               513            385
                                                     -------        -------

           Total operating expenses                    5,188          5,029
                                                     -------        -------

INCOME FROM OPERATIONS                                10,599         10,570

INTEREST EXPENSE - Net                                 7,031          7,095
                                                     -------        -------

INCOME BEFORE INCOME TAXES                             3,568          3,475

INCOME TAX PROVISON                                    1,582          1,375
                                                     -------        -------

NET INCOME                                           $ 1,986        $ 2,100
                                                     =======        =======


See notes to consolidated financial statements.


                                      -2-
<PAGE>   5


<TABLE>
<CAPTION>

TRANSDIGM HOLDING COMPANY

CONSOLIDATED STATEMENT OF CHANGES IN
STOCKHOLDERS' DEFICIENCY
FOR THE THIRTEEN WEEKS ENDED DECEMBER 30, 2000
(IN THOUSANDS OF DOLLARS)
(UNAUDITED)
---------------------------------------------------------------------------------------------------------------------------

                                                 COMMON                                ACCUMULATED
                                                 STOCK                                  OTHER
                                              (VOTING AND           RETAINED          COMPREHENSIVE
                                              CLASS A SHARES)       DEFICIT           INCOME (LOSS)         TOTAL
<S>              <C>                           <C>                 <C>                  <C>              <C>
BALANCE, OCTOBER 1, 2000                       $ 102,156           $(220,115)           $ (450)          $(118,409)

NET INCOME                                                             1,986                                 1,986

COMPREHENSIVE INCOME                                                                        18                  18

ACCRETION OF REDEEMABLE
  COMMON STOCK                                                          (256)                                 (256)
                                               ---------           ---------            ------           ---------

BALANCE, DECEMBER 30, 2000                     $ 102,156           $(218,385)           $ (432)          $(116,661)
                                               =========           =========            ======           =========
</TABLE>


See notes to consolidated financial statements.


                                      -3-
<PAGE>   6

<TABLE>
<CAPTION>

TRANSDIGM HOLDING COMPANY

CONSOLIDATED STATEMENTS OF CASH FLOWS
(IN THOUSANDS OF DOLLARS)
(UNAUDITED)
---------------------------------------------------------------------------------------------------------------------

                                                                                       THIRTEEN WEEKS ENDED
                                                                             ----------------------------------------
                                                                                DECEMBER 30,       DECEMBER 31,
                                                                                   2000                1999
<S>                                                                             <C>                <C>
OPERATING ACTIVITIES:
  Net income                                                                    $ 1,986            $ 2,100
  Adjustments to reconcile net income to net cash
    provided by (used in) operating activities:
    Depreciation                                                                  1,245                954
    Amortization of intangibles                                                     419                512
    Amortization of debt issue costs                                                402                384
    Interest deferral on Holdings PIK Notes                                         694                600
    Changes in assets and liabilities,
      excluding effect of acquisition of business (Note 5):
      Accounts receivable                                                         4,195              1,092
      Inventories                                                                (1,873)            (2,110)
      Refundable income taxes                                                     1,407              1,248
      Prepaid expenses and other assets                                             183                (83)
      Accounts payable                                                               (5)              (311)
      Accrued and other liabilities                                              (4,695)            (4,790)
                                                                                -------            -------
     Net cash provided by (used in) operating activities                          3,958               (404)
                                                                                -------            -------

INVESTING ACTIVITIES - Capital expenditures                                        (790)              (602)
                                                                                -------            -------

FINANCING ACTIVITIES:
  Net borrowings under revolving credit loans                                                          500
  Repayment of term loans                                                        (2,738)            (2,015)
                                                                                -------            -------
     Net cash used in financing activities                                       (2,738)            (1,515)
                                                                                -------            -------

NET INCREASE (DECREASE) IN CASH
  AND CASH EQUIVALENTS                                                              430             (2,521)

CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD                                    4,309              2,729
                                                                                -------            -------

CASH AND CASH EQUIVALENTS, END OF PERIOD                                        $ 4,739            $   208
                                                                                =======            =======

SUPPLEMENTAL DISCLOSURE OF
  CASH FLOW INFORMATION:
  Cash paid during the period for interest                                      $ 9,384            $ 9,250
                                                                                =======            =======

  Cash paid during the period for income taxes                                  $   175            $   127
                                                                                =======            =======
</TABLE>


See notes to consolidated financial statements.


                                      -4-

<PAGE>   7


TRANSDIGM HOLDING COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
THIRTEEN WEEKS ENDED DECEMBER 30, 2000 AND DECEMBER 31, 1999 (UNAUDITED)
--------------------------------------------------------------------------------

1.     DESCRIPTION OF THE BUSINESS

       TransDigm Holding Company ("Holdings"), through its wholly-owned
       operating subsidiary, TransDigm Inc. ("TransDigm"), is a premier supplier
       of proprietary mechanical components servicing predominantly the aircraft
       industry. TransDigm, along with its wholly-owned subsidiaries, Marathon
       Power Technologies Company ("Marathon"), ZMP, Inc. ("ZMP") and Adams Rite
       Aerospace, Inc., ("Adams Rite") (collectively, the "Company") offers a
       broad line of component products including tube connectors, valves,
       batteries, static inverters, pumps, quick disconnects, clamps, ball
       bearing and sliding controls, mechanical hardware, fluid controls,
       lavatory hardware, electromechanical controls, and oxygen systems related
       products.

2.     UNAUDITED FINANCIAL INFORMATION

       Except for the September 30, 2000 consolidated balance sheet, which was
       derived from the Company's audited financial statements, the financial
       information included herein is unaudited; however, the information
       reflects all adjustments (consisting solely of normal recurring
       adjustments) that are, in the opinion of management, necessary for a fair
       presentation of the Company's financial position and results of
       operations and cash flows for the interim periods presented. The results
       of operations for the thirteen weeks ended December 30, 2000 are not
       necessarily indicative of the results to be expected for the full year.

3.     INVENTORIES

       Inventories are stated at the lower of cost or market. Cost of
       inventories is determined by the average cost and the first-in, first-out
       (FIFO) methods. Inventories consist of the following (in thousands):

                                                   DECEMBER 30,    SEPTEMBER 30,
                                                       2000            2000

Work-in-progress and finished goods                 $ 26,889      $ 20,995
Raw materials and purchased component parts           18,592        18,325
                                                    --------      --------
           Total                                      45,481        39,320
Reserve for excess and obsolete inventory             (6,261)       (6,431)
                                                    --------      --------

Inventories - net                                   $ 39,220      $ 32,889
                                                    ========      ========


4.     CONTINGENCIES

       ENVIRONMENTAL - The soil and groundwater beneath the Company's facility
       in Waco, Texas have been impacted by releases of hazardous materials. The
       resulting contaminants of concern have been delineated and characterized.
       The majority of these contaminants are presently below action levels
       prescribed by the Texas Natural Resources Conservation Commission
       ("TNRCC"). In connection with the Company's acquisition of Marathon, a $2
       million escrow was previously funded to cover the cost of remediation
       that TNRCC might require for those contaminants currently in excess of
       action limits. As a result, the Company believes the condition of the
       soil and groundwater at the Waco facility will not require the incurrence
       of material expenditures. However, there can be no assurance that
       additional contamination will not be discovered or that the remediation
       required by the TNRCC will not be material to the financial condition,
       results of operations, or cash flows of the Company.


                                      -5-
<PAGE>   8



       OTHER - While the Company is currently involved in certain legal
       proceedings, management believes the results of these proceedings will
       not have a material effect on the financial condition, results of
       operations or cash flows of the Company. During the ordinary course of
       business, the Company is from time to time threatened with, or may become
       a party to, legal actions and other proceedings. The Company believes
       that its potential exposure to such legal actions is adequately covered
       by its aviation product and general liability insurance.

5.     ACQUISITION

       During December 2000, the Company entered into agreements with Honeywell
       International, Inc. ("Honeywell") to purchase certain inventory of
       Honeywell's lubrication and scavenge pump product line for $4.5 million,
       along with an option to enter into an exclusive, worldwide license
       agreement to produce and sell such products for at least forty years and
       to buy certain related assets. The Company expects that it will pay for
       the inventory by the end of the Company's third quarter and is included
       in accounts payable at December 30, 2000. The cost of the option was not
       significant.

       During January 2001, the Company exercised the option. The execution of
       the license agreement and the purchase of the related assets is subject
       to certain closing conditions.

6.     NEW ACCOUNTING STANDARD

       In June 1998, the Financial Accounting Standards Board issued Statement
       No. 133, Accounting for Derivative Instruments and Hedging Activities.
       This statement establishes accounting and reporting standards for
       derivative instruments, including certain derivative instruments embedded
       in other contracts (collectively referred to as derivatives), and for
       hedging activities. It requires that an entity recognize all derivatives
       as either assets or liabilities in the statement of financial position
       and measure those instruments at fair value. If certain conditions are
       met, a derivative may be specifically designated as (a) a hedge of the
       exposure to changes in the fair value of a recognized asset or liability
       or an unrecognized firm commitment, (b) a hedge of the exposure to
       variable cash flows of a forecasted transaction, or (c) a hedge of the
       foreign currency exposure of a net investment in a foreign operation, an
       unrecognized firm commitment, an available-for-sale security, or a
       foreign-currency-denominated forecasted transaction. The Company adopted
       this standard during the quarter ended December 30, 2000. The
       implementation of this standard did not have an impact on the Company's
       reported financial condition or results of operations.

                                    * * * * *


                                      -6-


<PAGE>   9



PART I:  FINANCIAL INFORMATION
ITEM 2

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

This Quarterly Statement includes "forward-looking statements" within the
meaning of Section 27A of the Securities Act and Section 21E of the Securities
Exchange Act of 1934, as amended, including, in particular, the statements about
our plans, strategies and prospects under this "Management's Discussion and
Analysis of Financial Condition and Results of Operations" section. Although the
Company believes that its plans, intentions and expectations reflected in or
suggested by such forward-looking statements are reasonable, the Company can
give no assurance that such plans, intentions or expectations will be achieved.
Important factors that could cause actual results to differ materially from the
forward-looking statements made in this Quarterly Statement are set forth herein
as well as under the caption "Risk Factors" in the Registration Statement filed
by the Company on Form S-4 on January 29, 1999, as amended through April 23,
1999. All forward-looking statements attributable to the Company or persons
acting on its behalf are expressly qualified in their entirety by those
cautionary statements.

OVERVIEW

The Company is a leading supplier of highly engineered aircraft components for
use on nearly all commercial and military aircraft. The Company sells its
products to commercial airlines and aircraft maintenance facilities in the
aftermarket, to most original equipment manufacturers ("OEMs") of aircraft and
to various agencies of the United States government. Sales of the Company's
products are made directly to these organizations as well as through U.S. and
international distributors who maintain inventories throughout the world of
products purchased from the Company and others.

During December 2000, the Company entered into agreements with Honeywell
International, Inc. ("Honeywell") to purchase certain inventory of Honeywell's
lubrication and scavenge pump product line for $4.5 million, along with an
option to enter into an exclusive, worldwide license agreement to produce and
sell such products for at least forty years and to buy certain related assets.
The Company expects that it will pay for the inventory by the end of the
Company's third quarter. The cost of the option was not significant.

During January 2001, the Company exercised the option. The execution of the
license agreement and the purchase of the related assets is subject to certain
closing conditions.

The following is management's discussion and analysis of certain significant
factors that have affected the Company's financial position and operating
results during the periods included in the accompanying consolidated financial
statements. The Company's fiscal year ends on September 30.

RESULTS OF OPERATIONS

The following table sets forth, for the periods indicated, certain operating
data of the Company as a percentage of net sales.

                                                THIRTEEN WEEKS ENDED
                                           -------------------------------
                                             DECEMBER 30,    DECEMBER 31,
                                                 2000          1999

Net sales                                        100 %         100 %
                                                 ---           ---
Gross profit                                      44            46
Selling and administrative                        12            12
Amortization of intangibles                        1             2
Research and development                           1             1
                                                 ---           ---
Income from operations                            30            31
Interest expense - net                            20            21
Provision for income taxes                         4             4
                                                 ---           ---
Net income                                         6 %           6 %
                                                 ===           ===


                                      -7-
<PAGE>   10


CHANGES IN RESULTS OF OPERATIONS

THIRTEEN WEEKS ENDED DECEMBER 30, 2000 COMPARED WITH THIRTEEN WEEKS ENDED
DECEMBER 31, 1999.

-      NET SALES. Net sales increased by $2.1 million, or 6.1%, to $35.8 million
       for the quarter ended December 30, 2000 from $33.7 million for the
       comparable quarter last year, primarily due to increased unit volume on
       existing products and new business opportunities.

-      GROSS PROFIT. Gross profit (net sales less cost of sales) increased by
       $.2 million, or 1.2%, to $15.8 million for the quarter ended December 30,
       2000 from $15.6 million from the comparable quarter last year. Gross
       profit as a percentage of net sales was 44.1% during the first quarter of
       fiscal 2001 and 46.2% during the first quarter of fiscal 2000, primarily
       due to changes in customer and product mix.

-      SELLING AND ADMINISTRATIVE. Selling and administrative expenses increased
       by $.2 million, or 3.0%, to $4.3 million for the quarter ended December
       30, 2000 from $4.1 million for the quarter ended December 31, 1999.
       Selling and administrative expenses as a percentage of net sales was
       approximately 12% for both quarters.

-      AMORTIZATION OF INTANGIBLES. Amortization of intangibles decreased by $.1
       million, or 18.2%, to $.4 million for the quarter ended December 30, 2000
       from $.5 million for the quarter ended December 31, 1999 as a result of
       certain intangible assets becoming fully amortized.

-      RESEARCH AND DEVELOPMENT. Research and development expense increased by
       $.1 million, or 33.2%, to $.5 million for the quarter ended December 30,
       2000 from $.4 million for the quarter ended December 31 1999. Research
       and development expense, as a percentage of net sales, was 1% for both
       quarters.

-      INCOME FROM OPERATIONS. Operating income approximated $10.6 million for
       the quarter ended December 30, 2000 and the comparable quarter last year.

-      INTEREST EXPENSE. Interest expense approximated $7.0 million for the
       first quarter of fiscal 2001 and the comparable quarter last year.

-      INCOME TAXES. Income tax expense as a percentage of income before income
       taxes was 44% for the thirteen weeks ended December 30, 2000 compared to
       40% for the thirteen weeks ended December 31, 1999, primarily due to
       increased earnings subject to tax.

-      NET INCOME. The Company earned $2.0 million for the first quarter of
       fiscal 2001 compared to $2.1 million for the first quarter of fiscal
       2000, primarily as a result of the factors referred to above.


                                      -8-
<PAGE>   11


BACKLOG

Management believes that sales order backlog (i.e., orders for products that
have not yet been shipped) is a useful indicator of sales to OEMs. As of
December 30, 2000, the Company estimated its sales order backlog at $79.1
million compared to an estimated $64.3 million as of December 31, 1999. The
majority of the purchase orders outstanding as of December 30, 2000 are
scheduled for delivery within the next twelve months. Purchase orders are
generally subject to cancellation by the customer prior to shipment. The level
of unfilled purchase orders at any given date during the year will be materially
affected by the timing of the Company's receipt of purchase orders and the speed
with which those orders are filled. Accordingly, the Company's backlog as of
December 30, 2000 may not necessarily represent the actual amount of shipments
or sales for any future period.

FOREIGN OPERATIONS

The Company manufactures all of its products in the United States. However, a
portion of the Company's sales is conducted abroad and a portion of raw
materials are purchased abroad. This activity is subject to numerous additional
risks, including the impact of foreign government regulations, currency
fluctuations, political uncertainties and differences in business practices.
There can be no assurance that foreign governments will not adopt regulations or
take other action that would have a direct or indirect adverse impact on the
business or market opportunities of the Company within such governments'
countries. Furthermore, there can be no assurance that the political, cultural
and economic climate outside the United States will be favorable to the
Company's operations and growth strategy.

INFLATION

Many of the Company's raw materials and operating expenses are sensitive to the
effects of inflation, which could result in changing operating costs. The
effects of inflation on the Company's businesses during the thirteen week
periods ended December 30, 2000 and December 31, 1999 were not significant.

LIQUIDITY AND CAPITAL RESOURCES

The Company generated approximately $4.0 million of cash in operating activities
during the thirteen weeks ended December 30, 2000 compared to approximately $.4
million used during the thirteen weeks ended December 31, 1999, principally due
to increased collections of accounts receivable during the quarter ended
December 30, 2000.

Cash used in investing activities was approximately $0.8 million during the
thirteen weeks ended December 30, 2000 compared to approximately $0.6 million
used during the thirteen weeks ended December 31, 1999, primarily due to
increased capital expenditures.

Cash used in financing activities during the thirteen weeks ended December 30,
2000 was approximately $2.7 million compared to approximately $1.5 million
provided by financing activities during the thirteen weeks ended December 31,
1999, primarily due to increased repayment of debt obligations.

The Company's primary cash needs will consist of capital expenditures and debt
service, including the payments required under the Honeywell agreement (see
"Overview"). The Company incurs capital expenditures for the purpose of
maintaining and replacing existing equipment and facilities and, from time to
time, for facility expansion.

ADDITIONAL DISCLOSURE REQUIRED BY INDENTURE

Separate financial information of TransDigm is not presented since the Senior
Subordinated Notes are guaranteed by Holdings and all direct and indirect
subsidiaries of TransDigm and since Holdings has no operations or assets
separate from its investment in TransDigm. In addition, Holdings' only liability
consists of Holdings PIK Notes of $25.3 million that bear interest at 12%
annually. Interest expense recognized on the Holdings PIK Notes during the
thirteen week periods ended December 30, 2000 and December 31, 1999 was $.7
million and $.6 million, respectively.


                                      -9-

<PAGE>   12


PART I:      FINANCIAL INFORMATION
ITEM 3

QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK

At December 30, 2000, the Company is subject to interest rate risk with respect
to borrowings under its credit facility as the interest rates on such borrowings
vary with market conditions and, thus, the amount of outstanding borrowings
approximates the fair value of the indebtedness. On a historical basis, the
weighted average interest rate on the $109.2 million of borrowings outstanding
under the credit facility at December 30, 2000 was 9.2%. Also outstanding at
December 30, 2000 was $125 million of Company indebtedness in the form of
subordinated notes and $25.3 million of Holdings PIK Notes. The interest rates
on both of these borrowings are fixed at 10 3/8% and 12% per year, respectively.

The sensitivity of changes in the fair value of the Company's outstanding
borrowings to changes in interest rates is described on page 17 of our Form 10-K
for the fiscal year ended September 30, 2000. There have been no material
changes in the sensitivity since September 30, 2000.



                                      -10-
<PAGE>   13



PART II:  OTHER INFORMATION

ITEM 6    Exhibits and Reports on Form 8-K

     (a)  Exhibits

          None

     (b)  Reports on Form 8-K

          None



                                      -11-
<PAGE>   14


                                   SIGNATURES


Pursuant to the requirements of Section 13 of the Securities Act of 1934, as
amended, each of the Co-Registrants has duly caused this Report to be signed on
its behalf by the undersigned, thereunto duly authorized, in the City of
Richmond Heights, State of Ohio, on February 13, 2001.

TRANSDIGM HOLDING COMPANY

By: /s/ Gregory Rufus
    -----------------------------------------
                Gregory Rufus
            Chief Financial Officer



TRANSDIGM INC.

By: /s/ Gregory Rufus
    -----------------------------------------
                Gregory Rufus
            Chief Financial Officer



MARATHON POWER TECHNOLOGIES COMPANY

By: /s/ Gregory Rufus
    -----------------------------------------
                 Gregory Rufus
             Chief Financial Officer



ZMP, INC.

By: /s/ Gregory Rufus
    -----------------------------------------
                Gregory Rufus
            Chief Financial Officer



ADAMS RITE AEROSPACE, INC.

By: /s/ Gregory Rufus
    -----------------------------------------
                Gregory Rufus
            Chief Financial Officer



                                      -12-

<PAGE>   15


TRANSDIGM HOLDING COMPANY

Pursuant to the requirements of the Securities Act of 1934, this Report has been
signed below by the following persons on behalf of the Co-Registrant and in the
capacities and as of the dates indicated.

<TABLE>
<CAPTION>

          SIGNATURE                                              TITLE                                    DATE
<S>                                       <C>                                                        <C>
*                                         Chief Executive Officer (Principal                          February 13, 2001
-----------------------------------       Executive Officer) and Chairman of the Board
     Douglas W. Peacock

*                                         President and Chief Operating Officer                       February 13, 2001
-----------------------------------       (Principal Operating Officer) and Director
     W. Nicholas Howley

    /s/ Gregory Rufus                     Chief Financial Officer (Principal Financial                February 13, 2001
-----------------------------------       and Accounting Officer)
     Gregory Rufus

*                                         Director                                                    February 13, 2001
-----------------------------------
     Stephen Berger

*                                         Director                                                    February 13, 2001
-----------------------------------
     William Hopkins

*                                         Director                                                    February 13, 2001
-----------------------------------
     Muzzafar Mirza

*                                         Director                                                    February 13, 2001
-----------------------------------
     John W. Paxton

*                                         Director                                                    February 13, 2001
-----------------------------------
     Thomas R. Wall, IV

</TABLE>


                                      -13-
<PAGE>   16



TRANSDIGM INC.

Pursuant to the requirements of the Securities Act of 1934, this Report has been
signed below by the following persons on behalf of the Co-Registrant and in the
capacities and as of the dates indicated.

<TABLE>
<CAPTION>

          SIGNATURE                                              TITLE                                    DATE
<S>                                       <C>                                                         <C>
*                                         Chief Executive Officer (Principal                          February 13, 2001
-----------------------------------       Executive Officer) and Chairman of the Board
     Douglas W. Peacock

*                                         President and Chief Operating Officer                       February 13, 2001
-----------------------------------       (Principal Operating Officer) and Director
     W. Nicholas Howley

    /s/ Gregory Rufus                     Chief Financial Officer (Principal Financial                February 13, 2001
-----------------------------------       and Accounting Officer)
     Gregory Rufus

*                                         Director                                                    February 13, 2001
-----------------------------------
     Stephen Berger

*                                         Director                                                    February 13, 2001
-----------------------------------
     William Hopkins

*                                         Director                                                    February 13, 2001
-----------------------------------
     Muzzafar Mirza

*                                         Director                                                    February 13, 2001
-----------------------------------
     John W. Paxton

*                                         Director                                                    February 13, 2001
-----------------------------------
     Thomas R. Wall, IV

</TABLE>



                                      -14-


<PAGE>   17


MARATHON POWER TECHNOLOGIES COMPANY

Pursuant to the requirements of the Securities Act of 1934, this Report has been
signed below by the following persons on behalf of the Co-Registrant and in the
capacities and as of the dates indicated.

<TABLE>
<CAPTION>

          SIGNATURE                                              TITLE                                    DATE
<S>                                       <C>                                                         <C>
*                                         Chief Executive Officer (Principal                          February 13, 2001
-----------------------------------       Executive Officer) and Chairman of the Board
     Douglas W. Peacock

*                                         President (Principal Operating Officer)                     February 13, 2001
-----------------------------------
     Albert J. Rodriguez

    /s/ Gregory Rufus                     Chief Financial Officer (Principal Financial                February 13, 2001
-----------------------------------       and Accounting Officer)
     Gregory Rufus

*                                         Director                                                    February 13, 2001
-----------------------------------
     W. Nicholas Howley

</TABLE>


                                      -15-

<PAGE>   18


ZMP, INC.

Pursuant to the requirements of the Securities Act of 1934, this Report has been
signed below by the following persons on behalf of the Co-Registrant and in the
capacities and as of the dates indicated.

<TABLE>
<CAPTION>

          SIGNATURE                                              TITLE                                    DATE
<S>                                       <C>                                                         <C>
*                                         Chairman of the Board and Executive Vice                    February 13, 2001
-----------------------------------       President (Principal Executive Officer)
     Douglas W. Peacock

*                                         President (Principal Operating Officer)                     February 13, 2001
-----------------------------------
     John F. Leary

    /s/ Gregory Rufus                     Treasurer and Chief Financial Officer                       February 13, 2001
-----------------------------------       (Principal Financial and Accounting Officer)
     Gregory Rufus

*                                         Executive Vice President and Director                       February 13, 2001
-----------------------------------
     W. Nicholas Howley

</TABLE>


                                      -16-

<PAGE>   19


ADAMS RITE AEROSPACE, INC.

Pursuant to the requirements of the Securities Act of 1934, this Report has been
signed below by the following persons on behalf of the Co-Registrant and in the
capacities and as of the dates indicated.

<TABLE>
<CAPTION>

          SIGNATURE                                              TITLE                                    DATE
<S>                                       <C>                                                         <C>
*                                         Chairman of the Board and Executive Vice                    February 13, 2001
-----------------------------------       President (Principal Executive Officer)
     Douglas W. Peacock

*                                         President (Principal Operating Officer)                     February 13, 2001
-----------------------------------
     John F. Leary

    /s/ Gregory Rufus                     Treasurer and Chief Financial Officer                       February 13, 2001
-----------------------------------       (Principal Financial and Accounting Officer)
     Gregory Rufus

*                                         Executive Vice President and Director                       February 13, 2001
-----------------------------------
     W. Nicholas Howley

</TABLE>

*    The undersigned, by signing his name hereto, does sign and execute this
     Annual Report on Form 10-K pursuant to the Power of Attorney executed by
     the above-named officers and Directors of the Co-Registrants and filed
     with the Securities and Exchange Commission on behalf of such officers
     and Directors.


                                       By:           /s/Gregory Rufus
                                           -------------------------------------
                                                        Gregory Rufus
                                                      ATTORNEY-IN-FACT




                                      -17-