TransDigm Group Incorporated

(Exact name of registrant as specified in its charter)

(216) 706-2960

(Registrants’ 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 by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    YES   x     NO   ¨

Indicate by check mark whether the registrant is a large accelerated filer, accelerated filer, non-accelerated filer, or smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one).

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    YES   ¨     NO   x

The number of shares outstanding of TransDigm Group Incorporated’s common stock, par value $.01 per share, was 49,649,280 as of January 28, 2011.

INDEX

TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATED BALANCE SHEETS

(Amounts in thousands, except share amounts)

(Unaudited)

See notes to condensed consolidated financial statements.

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TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

FOR THE THIRTEEN WEEK PERIODS ENDED

JANUARY 1, 2011 AND JANUARY 2, 2010

(Amounts in thousands, except per share amounts)

(Unaudited)

See notes to condensed consolidated financial statements.

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TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS’ EQUITY

FOR THE THIRTEEN WEEK PERIOD ENDED JANUARY 1, 2011

(Amounts in thousands, except share amounts)

(Unaudited)

See notes to condensed consolidated financial statements.

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TRANSDIGM GROUP INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Amounts in thousands)

(Unaudited)

See notes to condensed consolidated financial statements.

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TRANSDIGM GROUP INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

THIRTEEN WEEK PERIODS ENDED JANUARY 1, 2011 AND JANUARY 2, 2010

(UNAUDITED)

Description of the Business – TransDigm Group Incorporated (“TD Group”), through its wholly-owned subsidiary, TransDigm Inc., is a leading global designer, producer and supplier of highly engineered aircraft components for use on nearly all commercial and military aircraft in service today. TransDigm Inc. (which includes the Adel Wiggins Group), along with TransDigm Inc.’s direct and indirect wholly-owned operating subsidiaries (collectively, with TD Group, the “Company” or “TransDigm”) offers a broad range of proprietary aerospace components. TD Group has no significant assets or operations other than its 100% ownership of TransDigm Inc. TD Group’s common stock is listed on The New York Stock Exchange, or the NYSE, under the trading symbol “TDG.”

Major product offerings, substantially all of which are ultimately provided to end-users in the aerospace industry, include mechanical/electro-mechanical actuators and controls, ignition systems and engine technology, specialized pumps and valves, power conditioning devices, specialized AC/DC electric motors and generators, aircraft audio systems, specialized cockpit displays, engineered latching and locking devices, specialized lavatory components, engineered connectors and elastomers, rods and locking devices, NiCad batteries/chargers, and lighting and control technology.

Separate Financial Statements – Separate financial statements of TransDigm Inc. are not presented since TransDigm Inc.’s 7  ³ / 4 % senior subordinated notes are fully and unconditionally guaranteed on a senior subordinated basis by TD Group and all existing domestic subsidiaries of TransDigm Inc. and since TD Group has no significant operations or assets separate from its investment in TransDigm Inc.

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. These financial statements and notes should be read in conjunction with the financial statements and related notes for the year ended September 30, 2010 included in TD Group’s Form 10-K dated November 15, 2010 and Form 10-K/A dated November 19, 2010. As disclosed therein, the Company’s annual consolidated financial statements were prepared in conformity with generally accepted accounting principles in the United States (“GAAP”). The September 30, 2010 condensed consolidated balance sheet was derived from TD Group’s audited financial statements. The results of operations for the thirteen week period ended January 1, 2011 are not necessarily indicative of the results to be expected for the full year.

McKechnie Aerospace Holdings, Inc. – On December 6, 2010, TransDigm Inc. completed the acquisition of McKechnie Aerospace Holdings Inc. (“McKechnie Aerospace”), for approximately $1.27 billion in cash, subject to adjustments based on the level of working capital as of the closing date of the acquisition. McKechnie Aerospace is a leading global designer, producer and supplier of aerospace components, assemblies and subsystems for commercial aircraft, regional/business jets, military fixed wing and rotorcraft. These products fit well with TransDigm’s overall business direction.

The Company financed the McKechnie Aerospace acquisition, repaid borrowings under the previous senior secured credit facility and redeemed outstanding 7  ³ / 4 % Senior Subordinated Notes due 2014 through a combination of the offering of $1.60 billion of 7  ³ / 4 % Senior Subordinated Notes dues 2018 and borrowings under the new revolving credit facility of $1.55 billion. See Note 8 to the Condensed Consolidated Financial Statements.

The total purchase price was allocated to the underlying assets acquired and liabilities assumed based upon management’s estimated fair values at the date of acquisition. The Company is in the process of obtaining information to assist in the valuation of certain tangible and intangible assets of McKechnie Aerospace, and therefore the condensed consolidated balance sheet at January 1, 2011 reflects the preliminary purchase price allocation for the business. To the extent the purchase price exceeded the estimated fair value of the net identifiable tangible and intangible assets acquired, such excess was allocated to goodwill.

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The following table summarizes the preliminary purchase price allocation of the estimated fair values of the assets acquired and liabilities assumed at the transaction date.

The Company expects that the approximately $938.7 million of goodwill recognized for the acquisition will not be deductible for tax purposes.

The results of operations of McKechnie Aerospace are included in the Company’s consolidated financial statements from the date of the transaction. The Company recorded net sales of $22.8 million from the date of acquisition through January 1, 2011. Had the McKechnie acquisition and related financing transactions occurred at the beginning of the thirteen week period ended January 2, 2010, unaudited pro forma consolidated results for the thirteen week periods ended January 1, 2011 and January 2, 2010 would have been as follows:

The unaudited pro forma consolidated results are based on the Company’s historical financial statements and those of McKechnie Aerospace and do not necessarily indicate the results of operations that would have resulted had the acquisition actually been completed at the beginning of the applicable period presented. The pro forma financial information assumes that the companies were combined as of October 1, 2009. The pro forma results for the thirteen week period ended January 2, 2010 reflect the business combination accounting effects from the acquisition including amortization charges from the acquired intangible assets, inventory purchase accounting adjustments charged to cost of sales as the inventory is sold, increase in interest expense associated with debt incurred to fund the acquisition, refinancing costs associated with the refinancing of the Company’s entire debt structure and acquisition-related transaction costs. The unaudited pro forma consolidated results do not give effect to the synergies of the acquisition and are not indicative of the results of operations in future periods.

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Talley Actuation – On December 31, 2010, TransDigm Inc. completed the acquisition of the actuation business of Telair International Inc. (“Talley Actuation”), a wholly-owned subsidiary of Teleflex Incorporated, for approximately $94 million in cash, subject to adjustments based on the level of working capital as of the closing date of the acquisition. Talley Actuation manufactures proprietary, highly engineered electro-mechanical products and other components for commercial and military aircraft. These products fit well with TransDigm’s overall business direction. The Company expects that the approximately $67 million of goodwill recognized for the acquisition will be deductible for tax purposes.

Semco Instruments – On September 3, 2010, TransDigm Inc. completed the acquisition of Semco Instruments, Inc. (“Semco Instruments”) for approximately $73.6 million in cash, which includes a purchase price adjustment of $3.0 million paid in the first quarter of fiscal 2011. Semco Instruments manufactures proprietary, highly engineered components for major turbo-prop, turbo-fan, and turbo-shaft engines which are primarily used on helicopters, business jets and selected regional airplanes. These products fit well with TransDigm’s overall business direction. The Company expects that the approximately $42.6 million of goodwill recognized for the acquisition will not be deductible for tax purposes.

Dukes Aerospace – On December 2, 2009, TransDigm Inc., through a newly formed, wholly owned subsidiary of TransDigm Inc., Dukes Aerospace Inc., acquired certain assets and liabilities from Dukes, Inc. and GST Industries, Inc. (collectively “Dukes Aerospace”) for approximately $95.7 million in cash, subject to adjustment based on the level of working capital as of the closing date of the acquisition. In addition, the agreement provides for potential earn-out payments up to a total of $60 million over four years based on the achievement of certain growth targets. Dukes Aerospace is a supplier of proprietary, highly engineered components primarily to the business jet, regional jet, and military aerospace markets, along with commercial and military helicopter markets. The products are comprised primarily of highly engineered valves and certain pumps, solenoids and related components. These products fit well with TransDigm’s overall business direction. The purchase price allocation includes a fair value liability of $8.0 million recorded for the potential earn-out payments. The Company expects that the approximately $64.0 million of goodwill recognized for the acquisition will be deductible for tax purposes.

The Company accounted for the acquisitions of McKechnie Aerospace, Talley Actuation, Semco Instruments and Dukes Aerospace (collectively, the “Acquisitions”) using the acquisition method and included the results of operations of the Acquisitions in its consolidated financial statements from the effective date of each acquisition. The Company is in the process of obtaining information to assist in the valuation of certain tangible and intangible assets of McKechnie Aerospace and Talley Actuation; thus, the values attributed to acquired assets in the consolidated financial statements are subject to adjustment. Pro forma net sales and results of operations for the acquisitions of Talley Actuation, Semco Instruments and Dukes Aerospace, had they occurred at the beginning of the thirteen week periods ended January 1, 2011 and January 2, 2010, respectively, are not significant and, accordingly, are not provided.

The Acquisitions strengthen and expand our position to design, produce and supply highly engineered proprietary aerospace components in niche markets with significant aftermarket content and provide opportunities to create value through the application of our three core value-driven operating strategies. The purchase price paid for each acquisition reflects the current earnings before interest, taxes, depreciation and amortization (EBITDA) and cash flows, as well as, the future EBITDA and cash flows expected to be generated by the business, which is driven in most cases by the recurring aftermarket consumption over the life of a particular aircraft, which is estimated to be approximately 30 years.

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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 for all locations except CEF Industries LLC, which determines the cost of inventories using the last-in, first-out (LIFO) method. Approximately 6% of the inventory was valued under the LIFO method at January 1, 2011.

Inventories consist of the following (in thousands):

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The total carrying amount of identifiable intangible assets not subject to amortization consisted of trademarks and trade names in the amount of $298.1 million and $187.6 million at January 1, 2011 and September 30, 2010, respectively.

Intangible assets acquired during the thirteen week period ended January 1, 2011 were as follows (in thousands):

The aggregate amortization expense on identifiable intangible assets for the thirteen week periods ended January 1, 2011 and January 2, 2010 was approximately $4.4 million and $4.1 million, respectively. The estimated amortization expense for fiscal 2011 is $37.0 million and for each of the five succeeding years 2012 through 2016 is $27.9 million, $23.7 million, $23.7 million, $23.7 million and $23.7 million, respectively.

The following is a summary of changes in the carrying value of goodwill from September 30, 2010 through January 1, 2011 (in thousands):

The Company provides limited warranties in connection with the sale of its products. The warranty period for products sold varies among the Company’s operations, ranging generally from 90 days to six years. A provision for the estimated cost to repair or replace the products is recorded at the time of sale and periodically adjusted to reflect actual experience.

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The following table presents a reconciliation of changes in the product warranty liability for the periods indicated below (in thousands):

Revolving Credit Facility and Term Loan – In December 2010, TD Group’s wholly owned subsidiary, TransDigm Inc., entered into a New Senior Secured Credit Facility, which consists of a $1.55 billion term loan facility and a $245 million revolving credit facility (collectively, the “New Senior Secured Credit Facility”). The proceeds of the term loan were used to pay the purchase price of and related transaction expenses associated with the acquisition of McKechnie Aerospace and repay a portion of the amounts outstanding under the previous senior secured credit facility. Under the terms of the New Senior Secured Credit Facility, TransDigm is entitled on one or more occasions, subject to the satisfaction of certain conditions, to request an increase in the commitments under the revolving credit facility and/or additional term loans under the term loan facility in the aggregate principal amount of up to $500 million to the extent that existing or new lenders agree to provide such additional revolving commitments or additional term loans. At January 1, 2011, the Company had $7.0 million letters of credit outstanding and $238.0 million of borrowings available under the New Senior Secured Credit Facility.

Under the New Senior Secured Credit Facility, the term loan facility matures in December 2016 and the revolving credit facility matures in December 2015. The term loan facility under the New Senior Secured Credit Facility requires quarterly principal payments beginning March 31, 2011. Principal payments under the New Senior Secured Credit Facility are $11.6 million for the fiscal year ending September 30, 2011 and $15.5 million for each of the fiscal years ending September 30, 2012 through September 30, 2015.

The interest rates per annum applicable to loans, other than swingline loans, under the New Senior Secured Credit Facility are, at TransDigm’s option, equal to either an alternate base rate or an adjusted LIBO rate for one, two, three or six-month (or to the extent agreed to by each relevant lender, nine or twelve-month) interest periods chosen by TransDigm, in each case plus an applicable margin percentage. The alternate base rate will be the greatest of (i) 2.50%, (ii) Credit Suisse AG’s prime rate, (iii) 50 basis points over the weighted average of rates on overnight Federal funds as published by the Federal Reserve Bank of New York, and (iv) the adjusted LIBO rate with a maturity of three months plus 1.0%. The LIBO rate will be determined by reference to settlement rates established for deposits in dollars in the London interbank market for a period equal to the interest period of the loan as adjusted for the maximum reserve percentages established by the Board of Governors of the United States Federal Reserve. The adjusted LIBO rate will be the greater of (i) 1.50% and (ii) the rate obtained by dividing (x) the LIBO Rate by (y) a percentage equal to 1 minus the stated maximum rate (stated as a decimal) of all reserves, if any, required to be maintained against “Eurocurrency liabilities” as specified in Regulation D (including any marginal, emergency, special or supplemental reserves). The applicable margin percentage is a percentage per annum equal to (i) 2.75% for alternate base rate revolving loans, (ii) 3.75% for adjusted LIBO rate revolving loans and (iii) with respect to alternate base rate term loans and adjusted LIBO rate term loans, a per annum rate of 2.00% to 2.50% (in the case of alternate base rate term loans) and 3.00% to 3.50% (in the case of adjusted LIBO rate term loans), as adjusted in accordance with a pricing grid based on the consolidated leverage ratio of TransDigm on the applicable date of determination. At January 1, 2011, the applicable interest rate on the term loan was 5.0%.

Under the terms of the New Senior Secured Credit Facility, the Company is required to pay the administrative agent certain fees. In addition, on the last day of each calendar quarter the Company is required to pay a commitment fee equal to the applicable rate per annum in effect from time to time of any unused commitments under the revolving credit line and certain other fees in respect of letters of credit that may be outstanding thereunder from time to time.

All of the indebtedness outstanding under the New Senior Secured Credit Facility is guaranteed by TD Group and all of TransDigm’s current and future domestic restricted subsidiaries (other than immaterial subsidiaries), and is

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secured by a first priority security interest in substantially all of the existing and future property and assets, including inventory, equipment, general intangibles, intellectual property, investment property and other personal property (but excluding leasehold interests and certain other assets) of TransDigm and all of TransDigm’s existing and future domestic restricted subsidiaries (other than immaterial subsidiaries), and a first priority pledge of the capital stock of TransDigm and its domestic subsidiaries and 65% of the voting capital stock of certain of TransDigm’s foreign subsidiaries.

The New Senior Secured Credit Facility contains certain covenants that limit the ability of TD Group, TransDigm and TransDigm’s restricted subsidiaries to, among other things, incur or guarantee additional indebtedness or issue preferred stock, pay distributions on, redeem or repurchase capital stock or redeem or repurchase subordinated debt, make investments, sell assets, enter into agreements that restrict distributions or other payments from restricted subsidiaries to TransDigm, incur or suffer to exist liens securing indebtedness, consolidate, merge or transfer all or substantially all of their assets, and engage in transactions with affiliates.

In addition, the New Senior Secured Credit Facility contains financial covenants commencing with the quarter ending April 2, 2011 that measure the (i) ratio of TransDigm’s consolidated total net indebtedness to the amount of TransDigm’s consolidated EBITDA (“consolidated net leverage ratio”), and (ii) ratio of the amount of TransDigm’s consolidated EBITDA to TransDigm’s consolidated interest expense (“consolidated interest coverage ratio”). TransDigm is in compliance with all of the covenants contained in the New Senior Secured Credit Facility.

The term loan under the New Senior Secured Credit Facility is subject to mandatory prepayments of principal based on a percentage of Excess Cash Flow (as defined in the agreement) if the Consolidated Leverage Ratio exceeds 4.50 to 1.00 for the Company’s fiscal year commencing with the fiscal year ending September 30, 2012. “Consolidated Leverage Ratio” means the ratio of consolidated total indebtedness to the aggregate amount of EBITDA As Defined, calculated on a pro forma basis. In addition, subject to certain exceptions (including, with respect to asset sales, reinvestment in productive assets), TransDigm will be required to prepay the loans outstanding under the term loan facility at 100% of the principal amount thereof, plus accrued and unpaid interest, with the net cash proceeds of certain asset sales and the issuance or incurrence of certain indebtedness.

Senior Subordinated Notes – In December 2010, TransDigm issued $1.6 billion in aggregate principal amount of its 7  ³ / 4 % Senior Subordinated Notes due 2018 (the “2018 Notes”) at an issue price of 100% of the principal amount. The 2018 Notes represent unsecured obligations of TransDigm Inc. ranking subordinate to TransDigm Inc.’s senior debt, as defined in the indenture governing the 2018 Notes. Interest under the 2018 Notes is payable semi-annually.

The 2018 Notes are redeemable by TransDigm, in whole or in part, at specified redemption prices, which decline from 103.875% to 100% over the remaining term of the 2018 Notes, plus accrued and unpaid interest. Prior to December 15, 2013, TransDigm is permitted to redeem specified percentages of the 2018 Notes from the proceeds of equity offerings at a redemption price of 107.75%, plus accrued and unpaid interest. If a change in control of the Company occurs, the holders of the 2018 Notes will have the right to demand that TransDigm redeem the 2018 Notes at a purchase price equal to 101% of the principal amount of the 2018 Notes plus accrued and unpaid interest. The 2018 Notes contain many of the same restrictive covenants included in the New Senior Secured Credit Facility. TransDigm is in compliance with all of the covenants contained in the 2018 Notes.

TransDigm utilized a portion of the proceeds from the 2018 Notes to purchase approximately $968.6 million aggregate principal amount of its 7  ³ / 4 % Senior Subordinated Notes due 2014 (the “2014 Notes”) representing all such 2014 Notes that were validly tendered at or prior to the consent expiration deadline pursuant to TransDigm’s previously announced cash offers to purchase any and all of its outstanding 2014 Notes in December 2010. TransDigm also received consents from holders of the required majority of the principal amount of the 2014 Notes to, among other modifications, eliminate substantially all of the restrictive covenants and certain events of default in the indentures governing the 2014 Notes. At January 1, 2011, TransDigm had approximately $31.4 million outstanding under the 2014 Notes. These remaining 2014 Notes were subsequently redeemed in January 2011. See Note 13.

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Remaining proceeds from the 2018 Notes were utilized to pay off the remaining outstanding balance under the previous senior secured credit facility and for general corporate purposes.

The Company recorded refinancing costs of $70.7 million during the thirteen week period ended January 1, 2011 representing charges resulting from the refinancing of TransDigm’s entire debt structure. The charge consisted of the premium of $40.7 million paid to redeem the 2014 Notes, the write-off of debt issue costs and unamortized note premium and discount of $25.7 million, and the settlement of the interest rate swap agreement and other expenses of $4.3 million.

Special Cash Dividend Payment – In October 2009, TransDigm made a special cash dividend to its stockholders of $7.65 per share and cash dividend equivalents payments (“Dividend Equivalent Payments”) to holders of options to purchase its common stock from the net proceeds of the $425 million Senior Subordinated Notes due 2014 issued in October 2009. After the payment of debt issue fees and expenses, the net proceeds amounted to approximately $404.5 million. The special cash dividend and Dividend Equivalent Payments of $404.9 million were paid in the first quarter of fiscal 2010 and $2.8 million were paid in the first quarter of fiscal 2011. The $425 million of 2014 Notes were included in the tender offer made in conjunction with the 2018 Notes issuance.

Our operations and facilities are subject to a number of federal, state, local and foreign environmental laws and regulations that govern, among other things, discharges of pollutants into the air and water, the generation, handling, storage and disposal of hazardous materials and wastes, the remediation of contamination and the health and safety of our employees. Environmental laws and regulations may require that the Company investigate and remediate the effects of the release or disposal of materials at sites associated with past and present operations. At certain facilities acquired in connection with the acquisition of McKechnie Aerospace or third-party sites utilized by McKechnie Aerospace, the Company has been identified as a potentially responsible party under the federal Superfund laws and comparable state laws. The Company is currently involved in the investigation and remediation of a number of sites under applicable laws.

Estimates of the Company’s environmental liabilities are based on current facts, laws, regulations and technology. These estimates take into consideration the Company’s prior experience and professional judgment of the Company’s environmental specialists. Estimates of the Company’s environmental liabilities are further subject to uncertainties regarding the nature and extent of site contamination, the range of remediation alternatives available, evolving remediation standards, imprecise engineering evaluations and cost estimates, the extent of corrective actions that may be required and the number and financial condition of other potentially responsible parties, as well as the extent of their responsibility for the remediation.

Accordingly, as investigation and remediation proceed, it is likely that adjustments in the Company’s accruals will be necessary to reflect new information. The amounts of any such adjustments could have a material adverse effect on the Company’s results of operations or cash flows in a given period. Based on currently available information, however, the Company does not believe that future environmental costs in excess of those accrued with respect to sites for which the Company has been identified as a potentially responsible party are likely to have a material adverse effect on the Company’s financial condition.

Environmental liabilities are recorded when the liability is probable and the costs are reasonably estimable, which generally is not later than at completion of a feasibility study or when the Company has recommended a remedy or has committed to an appropriate plan of action. The liabilities are reviewed periodically and, as investigation and remediation proceed, adjustments are made as necessary. Liabilities for losses from environmental remediation obligations do not consider the effects of inflation and anticipated expenditures are not discounted to their present value. The liabilities are not reduced by possible recoveries from insurance carriers or other third parties, but do reflect anticipated allocations among potentially responsible parties at federal Superfund sites or similar state-managed sites, third party indemnity obligations, and an assessment of the likelihood that such parties will fulfill their obligations at such sites.

The Company’s consolidated balance sheet includes the following for environmental remediation obligations:

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At the end of each reporting period, TD Group makes an estimate of its annual effective income tax rate. The estimate used in the year-to-date period may change in subsequent periods. During the thirteen week periods ended January 1, 2011 and January 2, 2010, the effective income tax rate was 33.2% and 35.8%, respectively. The lower effective tax rate for the thirteen week period ended January 1, 2011 was primarily due to the retroactive reinstatement of the research and development tax credit and the continued phase-in of the domestic manufacturing deduction.

TD Group and its subsidiaries file income tax returns in the U.S. federal jurisdiction, various state and local jurisdictions as well as foreign jurisdictions located in the United Kingdom, Belgium and Malaysia. The Company is no longer subject to U.S. federal examination for years before fiscal year 2009. In addition, the Company is subject to state and local income tax examinations for fiscal years 2006 through 2010.

At January 1, 2011 and September 30, 2010, TD Group had $1.9 million and $1.8 million in unrecognized tax benefits, the recognition of which would have an effect of approximately $1.3 million on the effective tax rate at January 1, 2011 and September 30, 2010. The Company does not believe that the tax positions that comprise the unrecognized tax benefit amount will change significantly over the next 12 months. The Company recognizes accrued interest and penalties related to unrecognized tax benefits in income tax expense.

The following tables present our assets and liabilities that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs (other than quoted prices) that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability. A financial asset or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement.

The following summarizes the carrying amounts and fair values of financial instruments (in thousands):

Interest rate swaps were measured at fair value using quoted market prices for the swap interest rate indexes over the term of the swap discounted to present value versus the fixed rate of the contract. The estimated fair value of

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the Company’s term loans was based on information provided by the agent under the Company’s senior secured credit facility. The estimated fair values of the Company’s 7  ³ / 4 % senior subordinated notes due 2014 and 7  ³ / 4 % senior subordinated notes due 2018 were based upon quoted market prices.

At September 30, 2010, an agreement was in place to swap variable interest rates on our previous senior secured credit facility for a fixed interest rate for the notional amount of $300 million through March 23, 2011. This interest rate swap agreement effectively converted the variable rate interest on the notional amount of our senior secured credit facility to a fixed rate of 3.04% plus the 2% margin percentage, over the term of the agreement. The interest rate swap agreement was terminated in December 2010 in conjunction with the repayment of the outstanding term loan balance under the previous senior secured credit facility.

Comprehensive income (loss), which primarily includes adjustments for changes in the fair values of the interest rate swap agreements on a net of tax basis and foreign currency translation adjustments, was approximately ($5.7) million and $31.1 million for the thirteen week periods ended January 1, 2011 and January 2, 2010, respectively.

On January 15, 2011, TransDigm redeemed all of the 7  ³ / 4 % Senior Subordinated Notes due 2014 that remained outstanding at January 1, 2011 in the aggregate principal amount of approximately $31.4 million. The Company recorded additional refinancing costs of approximately $1.2 million relating to the redemption.

On January 28, 2011, TransDigm entered into a definitive agreement to sell its fastener businesses for approximately $240 million. The TransDigm fastener business, which was acquired in December 2010 as part of the McKechnie Aerospace acquisition, is made up of Valley-Todeco Inc. located in Sylmar, CA, and Linread Ltd. located in the United Kingdom. The divestiture, which is expected to close within sixty days from the date of the agreement, is subject to regulatory approvals and customary closing conditions.

We have evaluated events subsequent to January 1, 2011, through the date the financial statements were issued, and determined that no events have occurred that require adjustment of or disclosure in the consolidated financial statements, other than as disclosed above.

TransDigm’s 7  ³ / 4 % senior subordinated notes due 2018 are jointly and severally guaranteed, on a senior subordinated basis, by TD Group and TransDigm Inc.’s Domestic Restricted Subsidiaries, as defined in the indenture. The following supplemental condensed consolidating financial information presents, in separate columns, the balance sheets of the Company as of January 1, 2011 and September 30, 2010 and its statements of income and cash flows for the thirteen week periods ended January 1, 2011 and January 2, 2010 for (i) TransDigm Group on a parent only basis with its investment in subsidiaries recorded under the equity method, (ii) TransDigm Inc. including its directly owned operations and non-operating entities, (iii) the Subsidiary Guarantors on a combined basis, (iv) Non-Guarantor Subsidiaries after December 14, 2010 and (v) the Company on a consolidated basis.

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