TransDigm (TDG) 10-Q 30 Jan 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Dec. 27, 2014	Jan. 24, 2015
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	27-Dec-14
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	TDG
Entity Registrant Name	TRANSDIGM GROUP INC
Entity Central Index Key	1260221
Current Fiscal Year End Date	-21
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		52,709,274

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Dec. 27, 2014	Sep. 30, 2014
In Thousands, unless otherwise specified
CURRENT ASSETS:
Cash and cash equivalents	$1,011,629	$819,548
Trade accounts receivable - Net	333,510	351,307
Inventories - Net	470,847	459,074
Deferred income taxes	36,808	37,669
Prepaid expenses and other	23,557	21,978
Total current assets	1,876,351	1,689,576
PROPERTY, PLANT AND EQUIPMENT - Net	211,822	212,108
GOODWILL	3,515,734	3,525,077
TRADEMARKS AND TRADE NAMES	512,670	514,520
OTHER INTANGIBLE ASSETS - Net	687,931	702,633
DEBT ISSUE COSTS - Net	88,435	92,393
OTHER	20,629	20,541
TOTAL ASSETS	6,913,572	6,756,848
CURRENT LIABILITIES:
Current portion of long-term debt	39,295	39,295
Short-term borrowings - trade receivable securitization facility	200,000	200,000
Accounts payable	92,710	115,741
Accrued liabilities	313,047	230,871
Total current liabilities	645,052	585,907
LONG-TERM DEBT	7,233,836	7,233,836
DEFERRED INCOME TAXES	396,731	402,247
OTHER NON-CURRENT LIABILITIES	102,686	90,957
Total liabilities	8,378,305	8,312,947
STOCKHOLDERS' (DEFICIT) EQUITY:
Common stock - $.01 par value; authorized 224,400,000 shares; issued 54,031,601 and 53,832,246 at December 27, 2014 and September 30, 2014, respectively	540	538
Additional paid-in capital	816,305	794,767
Accumulated deficit	-2,059,181	-2,150,293
Accumulated other comprehensive loss	-46,457	-25,171
Treasury stock, at cost; 1,415,100 shares at December 27, 2014 and September 30, 2014	-175,940	-175,940
Total stockholders' (deficit) equity	-1,464,733	-1,556,099
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY	$6,913,572	$6,756,848

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 27, 2014	Sep. 30, 2014
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	224,400,000	224,400,000
Common stock, shares issued	54,031,601	53,832,246
Treasury stock, shares	1,415,100	1,415,100

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Income (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013
NET SALES	$586,898	$529,322
COST OF SALES	265,725	245,186
GROSS PROFIT	321,173	284,136
SELLING AND ADMINISTRATIVE EXPENSES	67,479	57,127
AMORTIZATION OF INTANGIBLE ASSETS	13,026	16,383
INCOME FROM OPERATIONS	240,668	210,626
INTEREST EXPENSE - Net	98,935	80,853
Income before income taxes	141,733	129,773
INCOME TAX PROVISION	46,200	43,650
NET INCOME	95,533	86,123
NET INCOME APPLICABLE TO COMMON STOCK	$92,168	$81,984
Net earnings per share - see Note 5:
Basic and diluted	$1.63	$1.44
Weighted-average shares outstanding:
Basic and diluted	56,591	56,991

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements Of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013
Net income	$95,533	$86,123
Other comprehensive income, net of tax:
Foreign currency translation adjustments	-10,748	2,647
Interest rate swap agreements, net of taxes of $5.9 million and $1.8 million for the thirteen week periods ended December 27, 2014 and December 28, 2013, respectively	-10,538	4,064
Other comprehensive income, net of tax	-21,286	6,711
TOTAL COMPREHENSIVE INCOME	$74,247	$92,834

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements Of Comprehensive Income (Parenthetical) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013
Interest rate swap agreements, taxes	$5.90	$1.80

Condensed_Consolidated_Stateme3

Condensed Consolidated Statement of Changes in Stockholders' Deficit (USD $)	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
In Thousands, except Share data
BEGINNING BALANCE at Sep. 30, 2014	($1,556,099)	$538	$794,767	($2,150,293)	($25,171)	($175,940)
BEGINNING BALANCE (in shares) at Sep. 30, 2014	53,832,246	53,832,246				-1,415,100
Unvested dividend equivalents	-4,421			-4,421
Compensation expense recognized for employee stock options	5,764		5,764
Excess tax benefits related to share-based payment arrangements	8,264		8,264
Exercise of employee stock options (in shares)		198,727
Exercise of employee stock options	7,393	2	7,391
Common stock issued (in shares)		628
Common stock issued	119		119
Net income	95,533			95,533
Foreign currency translation adjustments	-10,748				-10,748
Interest rate swaps, net of tax	-10,538				-10,538
ENDING BALANCE at Dec. 27, 2014	($1,464,733)	$540	$816,305	($2,059,181)	($46,457)	($175,940)
ENDING BALANCE (in shares) at Dec. 27, 2014	54,031,601	54,031,601				-1,415,100

Condensed_Consolidated_Stateme4

Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013
OPERATING ACTIVITIES:
Net income	$95,533	$86,123
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	8,425	7,404
Amortization of intangible assets	13,357	16,435
Amortization of debt issue costs	3,999	3,085
Non-cash equity compensation	5,764	4,175
Excess tax benefits related to share-based payment arrangements	-8,264	-3,636
Deferred income taxes	923	-87
Changes in assets/liabilities, net of effects from acquisitions of businesses:
Trade accounts receivable	17,096	-3,034
Inventories	-12,646	-2,216
Income taxes receivable/payable	40,589	45,118
Other assets	-3,156	3,156
Accounts payable	-22,773	-24,773
Accrued and other liabilities	50,112	-16,043
Net cash provided by operating activities	188,959	115,707
INVESTING ACTIVITIES:
Capital expenditures	-8,138	-8,097
Acquisition of businesses, net of cash acquired		-263,892
Net cash used in investing activities	-8,138	-271,989
FINANCING ACTIVITIES:
Excess tax benefits related to share-based payment arrangements	8,264	3,636
Proceeds from exercise of stock options	7,391	2,893
Dividends paid	-3,365	-4,139
Other	-41	-78
Net cash provided by (used in) financing activities	12,249	2,312
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	-989	154
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	192,081	-153,816
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	819,548	564,740
CASH AND CASH EQUIVALENTS, END OF PERIOD	1,011,629	410,924
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the period for interest	15,307	77,125
Cash paid during the period for income taxes	$944	$306

DESCRIPTION_OF_THE_BUSINESS

DESCRIPTION OF THE BUSINESS	3 Months Ended
	Dec. 27, 2014
DESCRIPTION OF THE BUSINESS	1	DESCRIPTION OF THE BUSINESS
	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. 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, NiCad batteries and chargers, engineered latching and locking devices, rods and locking devices, engineered connectors and elastomers, cockpit security components and systems, specialized cockpit displays, aircraft audio systems, specialized lavatory components, seatbelts and safety restraints, engineered interior surfaces, lighting and control technology and military personnel parachutes and cargo delivery systems.
	Separate Financial Statements – Separate financial statements of TransDigm Inc. are not presented because TransDigm Inc.’s 5 1/2% Senior Subordinated Notes due 2020 (the “2020 Notes”), 7 1/2% Senior Subordinated Notes due 2021 (the “2021 Notes”), 6% Senior Subordinated Notes due 2022 (the “2022 Notes”) and 6 1/2% Senior Subordinated Notes due 2024 (the “2024 Notes”) are fully and unconditionally guaranteed on a senior subordinated basis by TD Group and all existing 100% owned domestic subsidiaries of TransDigm Inc. (except TransDigm Receivables LLC and certain minor subsidiaries) and because TD Group has no significant operations or assets separate from its investment in TransDigm Inc.

UNAUDITED_INTERIM_FINANCIAL_IN

UNAUDITED INTERIM FINANCIAL INFORMATION	3 Months Ended
	Dec. 27, 2014
UNAUDITED INTERIM FINANCIAL INFORMATION	2	UNAUDITED INTERIM FINANCIAL INFORMATION
	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, 2014 included in TD Group’s Form 10-K dated November 14, 2014. 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, 2014 condensed consolidated balance sheet was derived from TD Group’s audited financial statements. The results of operations for the thirteen week period ended December 27, 2014 are not necessarily indicative of the results to be expected for the full year.

ACQUISITIONS

ACQUISITIONS	3 Months Ended
	Dec. 27, 2014
ACQUISITIONS	3	ACQUISITIONS
	Elektro-Metall Export GmbH – On March 6, 2014, TransDigm Germany GmbH, a newly formed subsidiary of TransDigm Inc., acquired Elektro-Metall Export GmbH (“EME”) for approximately $49.6 million, which comprises $40.4 million in cash plus the assumption of approximately $9.2 million of net indebtedness. EME manufactures proprietary, highly engineered aerospace electromechanical actuators, electrical and electromechanical components and assemblies for commercial aircraft, helicopters and other specialty applications. These products fit well with TransDigm’s overall business direction. EME is included in TransDigm’s Airframe segment. The Company expects that the approximately $20.3 million of goodwill recognized for the acquisition will not be deductible for tax purposes.
	Airborne Global Inc. – On December 19, 2013, TransDigm Inc. acquired all of the outstanding stock of Airborne Global Inc. (“Airborne”) for approximately $264.2 million in cash, which includes a purchase price adjustment of $0.3 million paid in the second quarter of fiscal 2014. Airborne is the industry leading designer and manufacturer of personnel parachutes, cargo aerial delivery systems, emergency escape systems, naval decoys and other related products. These products fit well with TransDigm’s overall business direction. Airborne is included in TransDigm’s Airframe segment. The Company expects that the approximately $155.9 million of goodwill recognized for the acquisition will not be deductible for tax purposes.
	The Company accounted for 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 a third-party valuation of certain tangible and intangible assets of EME; therefore, the values attributed to those acquired assets in the condensed consolidated financial statements are subject to adjustment. Pro forma net sales and results of operations for the acquisitions had they occurred at the beginning of the applicable thirteen week periods ended December 27, 2014 or December 28, 2013 are not significant and, accordingly, are not provided.
	The acquisitions strengthen and expand the Company’s 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 (obtaining profitable new business, improving our cost structure, and providing highly engineered value-added products to customers). 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 are driven in most cases by the recurring aftermarket consumption over the life of a particular aircraft, estimated to be approximately 25-30 years.

RECENT_ACCOUNTING_PRONOUNCEMEN

RECENT ACCOUNTING PRONOUNCEMENTS	3 Months Ended
	Dec. 27, 2014
RECENT ACCOUNTING PRONOUNCEMENTS	4	RECENT ACCOUNTING PRONOUNCEMENTS
	In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09 which creates a new topic in the Accounting Standards Codification (“ASC”) Topic 606, “Revenue From Contracts With Customers.” In addition to superseding and replacing nearly all existing U.S. GAAP revenue recognition guidance, including industry-specific guidance, ASC 606 establishes a new control-based revenue recognition model; changes the basis for deciding when revenue is recognized over time or at a point in time; provides new and more detailed guidance on specific topics; and expands and improves disclosures about revenue. In addition, ASU 2014-09 adds a new Subtopic to the Codification, ASC 340-40, “Other Assets and Deferred Costs: Contracts with Customers,” to provide guidance on costs related to obtaining a contract with a customer and costs incurred in fulfilling a contract with a customer that are not in the scope of another ASC Topic. The guidance is effective for the Company for annual reporting periods, including interim periods therein, for the year ending September 30, 2018. Early application is not permitted. The Company is currently evaluating the impact that the update will have on its financial position, results of operations, cash flows and financial statement disclosures.

EARNINGS_PER_SHARE_TWOCLASS_ME

EARNINGS PER SHARE (TWO-CLASS METHOD)	3 Months Ended
	Dec. 27, 2014
EARNINGS PER SHARE (TWO-CLASS METHOD)	5	EARNINGS PER SHARE (TWO-CLASS METHOD)
	The following table sets forth the computation of basic and diluted earnings per share (in thousands, except per share data):
			Thirteen Week Periods Ended
			December 27,			December 28,
			2014			2013
	Numerator for earnings per share:
	Net income		$	95,533		$	86,123
	Less dividends paid on participating securities			(3,365	)		(4,139	)
	Net income applicable to common stock - basic and diluted		$	92,168		$	81,984
	Denominator for basic and diluted earnings per share under the two-class method:
	Weighted average common shares outstanding			52,511			52,687
	Vested options deemed participating securities			4,080			4,304
	Total shares for basic and diluted earnings per share			56,591			56,991
	Basic and diluted earnings per share		$	1.63		$	1.44

INVENTORIES

INVENTORIES	3 Months Ended
	Dec. 27, 2014
INVENTORIES	6	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 for all locations except CEF Industries LLC, which determines the cost of inventories using the last-in, first-out (LIFO) method. Less than 4% of the inventory was valued under the LIFO method at December 27, 2014.
	Inventories consist of the following (in thousands):
			December 27,			September 30,
			2014			2014
	Raw materials and purchased component parts		$	308,443		$	298,318
	Work-in-progress			135,450			146,980
	Finished Goods			83,349			69,658
	Total			527,242			514,956
	Reserves for excess and obsolete inventory and LIFO			(56,395	)		(55,882	)
	Inventories - net		$	470,847		$	459,074

INTANGIBLE_ASSETS

INTANGIBLE ASSETS	3 Months Ended
	Dec. 27, 2014
INTANGIBLE ASSETS	7	INTANGIBLE ASSETS
	Intangible assets subject to amortization consist of the following (in thousands):
			December 27, 2014							September 30, 2014
			Gross Carrying		Accumulated			Net		Gross Carrying			Accumulated		Net
			Amount		Amortization					Amount			Amortization
	Technology		$	853,115	$	196,601		$	656,514	$	854,918		$	186,278	$	668,640
	Order backlog			8,006		8,006			—		8,006			6,006		2,000
	Other			43,253		11,836			31,417		43,252			11,259		31,993
	Total		$	904,374	$	216,443		$	687,931	$	906,176		$	203,543	$	702,633
	The aggregate amortization expense on identifiable intangible assets for the thirteen week periods ended December 27, 2014 and December 28, 2013 was approximately $13.4 million and $16.4 million, respectively. The estimated amortization expense is $46.3 million for fiscal 2015 and $44.3 million for each of the five succeeding fiscal years 2016 through 2020.
	The following is a summary of changes in the carrying value of goodwill by segment from September 30, 2014 through December 27, 2014 (in thousands):
			Power &		Airframe			Non-		Total
			Control					aviation
	Balance, September 30, 2014		$	1,606,948	$	1,862,760		$	55,369	$	3,525,077
	Goodwill acquired during the year			—		—			—		—
	Purchase price allocation adjustments			—		(2,424	)		—		(2,424	)
	Other			—		(6,919	)		—		(6,919	)
	Balance, December 27, 2014		$	1,606,948	$	1,853,417		$	55,369	$	3,515,734

INCOME_TAXES

INCOME TAXES	3 Months Ended
	Dec. 27, 2014
INCOME TAXES	8	INCOME TAXES
	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 quarter ended December 27, 2014 and December 28, 2013, the effective income tax rate was 32.6% and 33.6%, respectively. The Company’s effective tax rate for these periods was less than the Federal statutory tax rate due primarily to the domestic manufacturing deduction. The lower effective tax rate for the quarter ended December 27, 2014 was primarily due to a discrete adjustment related to the retroactive reinstatement of the research and development tax credit.
	The Company 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 Belgium, Canada, China, France, Germany, Hungary, Malaysia, Mexico, Singapore, Sri Lanka, and the United Kingdom. The Company is no longer subject to U.S. federal examinations for years before fiscal 2011. The Company is currently under U.S. federal examination for its fiscal 2012 and 2013 years and expects the examinations to be completed during fiscal 2015. AmSafe is subject to U.S. federal examinations for 2008, 2009, 2010 and 2011 years. In addition, the Company is subject to state income tax examinations for fiscal years 2009 and later.
	At December 27, 2014 and September 30, 2014, TD Group had $12.3 million and $13.9 million in unrecognized tax benefits, the recognition of which would have an effect on the effective tax rate for each period of approximately $11.8 million and $13.5 million, respectively. The Company believes that the tax positions that comprise the unrecognized tax benefit will be reduced by approximately $2.7 million over the next 12 months. The Company recognizes accrued interest and penalties related to unrecognized tax benefits in income tax expense.

FAIR_VALUE_MEASUREMENTS

FAIR VALUE MEASUREMENTS	3 Months Ended
	Dec. 27, 2014
FAIR VALUE MEASUREMENTS	9	FAIR VALUE MEASUREMENTS
	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):
					December 27, 2014				September 30, 2014
			Level		Carrying		Fair Value		Carrying		Fair Value
					Amount				Amount
	Assets:
	Cash and cash equivalents			1	$	1,011,629	$	1,011,629	$	819,548	$	819,548
	Liabilities:
	Interest rate swap agreements (1)			2		24,170		24,170		20,070		20,070
	Interest rate swap agreements (2)			2		18,030		18,030		4,650		4,650
	Short-term borrowings - trade receivable securitization facility			1		200,000		200,000		200,000		200,000
	Long-term debt:
	Term loans			2		3,873,131		3,792,000		3,873,131		3,821,000
	5 1/2% Senior Subordinated Notes due 2020			1		550,000		543,000		550,000		529,000
	7 1/2% Senior Subordinated Notes due 2021			1		500,000		533,000		500,000		531,000
	6% Senior Subordinated Notes due 2022			1		1,150,000		1,150,000		1,150,000		1,121,000
	6 1/2% Senior Subordinated Notes due 2024			1		1,200,000		1,212,000		1,200,000		1,182,000
	-1	Included in Accrued liabilities on the Condensed Consolidated Balance Sheet.
	-2	Included in Other non-current liabilities on the Condensed Consolidated Balance Sheet.
	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 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 2020 Notes, 2021 Notes, 2022 Notes and 2024 Notes were based upon quoted market prices.

DERIVATIVES_AND_HEDGING_ACTIVI

DERIVATIVES AND HEDGING ACTIVITIES	3 Months Ended
	Dec. 27, 2014
DERIVATIVES AND HEDGING ACTIVITIES	10	DERIVATIVES AND HEDGING ACTIVITIES
	The Company is exposed to, among other things, the impact of changes in interest rates in the normal course of business. The Company’s risk management program is designed to manage the exposure and volatility arising from these risks, and utilizes derivative financial instruments to offset a portion of these risks. The Company uses derivative financial instruments only to the extent necessary to hedge identified business risks and does not enter into such transactions for trading purposes. The Company generally does not require collateral or other security with counterparties to these financial instruments and is therefore subject to credit risk in the event of nonperformance; however, the Company monitors credit risk and currently does not anticipate nonperformance by other parties. The company has agreements with each of its swap counterparties that contain a provision whereby if the Company defaults on the credit facility the Company could also be declared in default on its swaps, resulting in an acceleration of payment under the Swaps.
	Interest rate swap agreements are used to manage interest rate risk associated with floating-rate borrowings under our credit facility. The interest rate swap agreements utilized by the Company effectively modify the Company’s exposure to interest rate risk by converting a portion of the Company’s floating-rate debt to a fixed rate basis through the expiration date of the interest rate swap agreements, thereby reducing the impact of interest rate changes on future interest expense. These agreements involve the receipt of floating rate amounts in exchange for fixed rate interest payments over the term of the agreements without an exchange of the underlying principal amount. These derivative instruments that qualify as effective cash flow hedges under GAAP. For these cash flow hedges, the effective portion of the gain or loss from the financial instruments was initially reported as a component of accumulated other comprehensive income (loss) in stockholders’ equity and subsequently reclassified into earnings in the same line as the hedged item in the same period or periods during which the hedged item affected earnings.
	At December 27, 2014, five forward-starting interest rate swap agreements beginning March 31, 2016 were in place to hedge the variable interest rates on the credit facility for a fixed rate based on an aggregate notional amount of $750 million through June 30, 2020. These forward-starting interest rate swap agreements will effectively convert the variable interest rate on the aggregate notional amount of the credit facility to a fixed rate of 5.8% (2.8% plus the 3% margin percentage) over the term of the interest rate swap agreements.
	At December 27, 2014, three interest rate swap agreements beginning September 30, 2014 were in place to hedge the variable interest rates on the credit facility for a fixed rate based on an aggregate notional amount of $1.0 billion through June 30, 2019. These interest rate swap agreements will effectively convert the variable interest rate on the aggregate notional amount of the credit facility to a fixed rate of 5.4% (2.4% plus the 3% margin percentage) over the term of the interest rate swap agreements.
	At December 27, 2014, three interest rate swap agreements were in place to swap variable rates on the credit facility for a fixed rate based on an aggregate notional amount of $353 million. These interest rate swap agreements converted the variable interest rate on the aggregate notional amount to a fixed rate of 5.17% (2.17% plus the 3% margin percentage) through June 30, 2015.
	In conjunction with the refinancing of the 2011 Credit Facility, the Company no longer designated the interest rate swap agreements relating to the $353 million aggregate notional amount as cash flow hedges for accounting purposes. Accordingly, amounts previously recorded as a component of accumulated other comprehensive loss in stockholder’s equity will be amortized into earnings over the remaining period of the swap agreements.
	Based on the fair value amounts of the interest rate swap agreements determined as of December 27, 2014, the estimated net amount of existing gains and losses expected to be reclassified into interest expense within the next twelve months is approximately $18.4 million.

SEGMENTS

SEGMENTS	3 Months Ended
	Dec. 27, 2014
SEGMENTS	11	SEGMENTS
	The Company’s businesses are organized and managed in three reporting segments: Power & Control, Airframe and Non-aviation. Effective October 1, 2014, the Company made certain organizational realignments of the businesses comprising the Power & Control and the Airframe segments. Operating results for the thirteen week period ended December 28, 2013 were reclassified to conform to the presentation for the thirteen week period ended December 27, 2014.
	The Power & Control segment includes operations that primarily develop, produce and market systems and components that predominately provide power to or control power of the aircraft utilizing electronic, fluid, power and mechanical motion control technologies. Major product offerings include mechanical/electro-mechanical actuators and controls, ignition systems and engine technology, specialized pumps and valves, engineered connectors and elastomers, power conditioning devices and specialized AC/DC electric motors and generators. Primary customers of this segment are engine and power system and subsystem suppliers, airlines, third party maintenance suppliers, military buying agencies and repair depots. Products are sold in the original equipment and aftermarket market channels.
	The Airframe segment includes operations that primarily develop, produce and market systems and components that are used in non-power airframe applications utilizing airframe and cabin structure technologies. Major product offerings include engineered latching and locking devices, rods and locking devices, cockpit security components and systems, aircraft audio systems, specialized lavatory components, seatbelts and safety restraints, engineered interior surfaces, lighting and control technology, personnel parachutes, cargo aerial delivery systems, emergency escape systems and naval decoys. Primary customers of this segment are airframe manufacturers and cabin system suppliers and subsystem suppliers, airlines, third party maintenance suppliers, military buying agencies and repair depots. Products are sold in the original equipment and aftermarket market channels.
	The Non-aviation segment includes operations that primarily develop, produce and market products for non-aviation markets. Major product offerings include seatbelts and safety restraints for ground transportation applications, mechanical/electro-mechanical actuators and controls for space applications, and refueling systems for heavy equipment used in mining, construction and other industries. Primary customers of this segment are off road vehicle suppliers and subsystem suppliers, child restraint system suppliers, satellite and space system suppliers and manufacturers of heavy equipment used in mining, construction and other industries.
	The primary measurement used by management to review and assess the operating performance of each segment is EBITDA As Defined. The Company defines EBITDA As Defined as earnings before interest, taxes, depreciation and amortization plus certain non-operating items including refinancing costs, acquisition-related costs, transaction-related costs and non-cash compensation charges incurred in connection with the Company’s stock option plans. Acquisition-related costs represent accounting adjustments to inventory associated with acquisitions of businesses and product lines that were charged to cost of sales when the inventory was sold; costs incurred to integrate acquired businesses and product lines into the Company’s operations, facility relocation costs and other acquisition-related costs; transaction related costs comprising deal fees; legal, financial and tax diligence expenses and valuation costs that are required to be expensed as incurred and other acquisition accounting adjustments.
	EBITDA As Defined is not a measurement of financial performance under GAAP. Although the Company uses EBITDA As Defined to assess the performance of its business and for various other purposes, the use of this non-GAAP financial measure as an analytical tool has limitations, and it should not be considered in isolation or as a substitute for analysis of the Company’s results of operations as reported in accordance with GAAP.
	The Company’s segments are reported on the same basis used internally for evaluating performance and for allocating resources. The accounting policies for each segment are the same as those described in the summary of significant accounting policies in the Company’s consolidated financial statements. Intersegment sales and transfers are recorded at values based on market prices, which creates intercompany profit on intersegment sales or transfers that is eliminated in consolidation. Intersegment sales were insignificant for the periods presented below.
	The following table presents net sales by reportable segment (in thousands):
			Thirteen Week Periods Ended
			December 27,		December 28,
			2014		2013
	Net sales to external customers
	Power & Control		$	283,379	$	274,050
	Airframe			281,614		231,824
	Non-aviation			21,905		23,448
			$	586,898	$	529,322
	The following table reconciles EBITDA As Defined by segment to consolidated income from continuing operations before income taxes (in thousands):
			Thirteen Week Periods Ended
			December 27,		December 28,
			2014		2013
	EBITDA As Defined
	Power & Control		$	146,128	$	136,959
	Airframe			125,821		106,495
	Non-aviation			4,738		5,106
	Total segment EBITDA As Defined			276,687		248,560
	Unallocated corporate expenses			6,959		5,003
	Total Company EBITDA As Defined			269,728		243,557
	Depreciation and amortization			21,785		23,839
	Interest expense - net			98,935		80,853
	Acquisition-related costs			1,511		4,917
	Stock compensation expense			5,764		4,175
	Income before income taxes		$	141,733	$	129,773
	The following table presents total assets by segment (in thousands):
			December 27,		September 30,
			2014		2014
	Total assets
	Power & Control		$	2,446,634	$	2,453,308
	Airframe			3,210,249		3,243,516
	Non-aviation			133,654		132,988
	Corporate			1,123,035		927,036
			$	6,913,572	$	6,756,848
	The Company’s sales principally originate from the United States, and the Company’s long-lived assets are principally located in the United States.

SUPPLEMENTAL_GUARANTOR_INFORMA

SUPPLEMENTAL GUARANTOR INFORMATION	3 Months Ended
	Dec. 27, 2014
SUPPLEMENTAL GUARANTOR INFORMATION	12	SUPPLEMENTAL GUARANTOR INFORMATION
	TransDigm’s 2020 Notes, 2021 Notes, 2022 Notes and 2024 Notes are jointly and severally guaranteed, on a senior subordinated basis, by TD Group and TransDigm Inc.’s 100% Domestic Restricted Subsidiaries, as defined in the Indentures. The following supplemental condensed consolidating financial information presents, in separate columns, the balance sheets of the Company as of December 27, 2014 and September 30, 2014 and its statements of income and comprehensive income and cash flows for the thirteen week periods ended December 27, 2014 and December 28, 2013 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 and (v) the Company on a consolidated basis.
	TRANSDIGM GROUP INCORPORATED
	CONDENSED CONSOLIDATING BALANCE SHEET
	AS OF DECEMBER 27, 2014
	(Amounts in thousands)
			TransDigm			TransDigm			Subsidiary			Non-			Eliminations			Total
			Group			Inc.			Guarantors			Guarantor						Consolidated
												Subsidiaries
	ASSETS
	CURRENT ASSETS:
	Cash and cash equivalents		$	715		$	989,052		$	199		$	21,663		$	—		$	1,011,629
	Trade accounts receivable - Net			—			(278	)		(3,913	)		337,701			—			333,510
	Inventories - Net			—			35,063			387,544			48,940			(700	)		470,847
	Deferred income taxes			—			36,808			—			—			—			36,808
	Prepaid expenses and other			—			1,967			16,617			4,973			—			23,557
	Total current assets			715			1,062,612			400,447			413,277			(700	)		1,876,351
	INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES		$	(1,465,444	)	$	5,325,555		$	3,906,050		$	(40,870	)	$	(7,725,291	)	$	—
	PROPERTY, PLANT AND EQUIPMENT - Net			—			15,808			167,368			28,646			—			211,822
	GOODWILL			—			61,921			3,289,410			164,403			—			3,515,734
	TRADEMARKS AND TRADE NAMES			—			19,376			449,706			43,588			—			512,670
	OTHER INTANGIBLE ASSETS - Net			—			20,395			631,552			37,445			(1,461	)		687,931
	DEBT ISSUE COSTS - Net			—			88,305			—			130			—			88,435
	OTHER			—			7,810			11,866			953			—			20,629
	TOTAL ASSETS		$	(1,464,729	)	$	6,601,782		$	8,856,399		$	647,572		$	(7,727,452	)	$	6,913,572
	LIABILITIES AND STOCKHOLDERS’
	(DEFICIT) EQUITY
	CURRENT LIABILITIES:
	Current portion of long-term debt		$	—		$	39,295		$	—		$	—		$	—		$	39,295
	Short-term borrowings — trade receivable securitization facility			—			—			—			200,000			—			200,000
	Accounts payable			—			13,835			69,698			13,804			(4,627	)		92,710
	Accrued liabilities			—			207,664			83,056			22,327			—			313,047
	Total current liabilities			—			260,794			152,754			236,131			(4,627	)		645,052
	LONG-TERM DEBT			—			7,233,836			—			—			—			7,233,836
	DEFERRED INCOME TAXES			—			397,010			—			(279	)		—			396,731
	OTHER NON-CURRENT LIABILITIES			—			57,585			39,477			5,624			—			102,686
	Total liabilities			—			7,949,225			192,231			241,476			(4,627	)		8,378,305
	STOCKHOLDERS’ (DEFICIT) EQUITY			(1,464,729	)		(1,347,443	)		8,664,168			406,096			(7,722,825	)		(1,464,733	)
	TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY		$	(1,464,729	)	$	6,601,782		$	8,856,399		$	647,572		$	(7,727,452	)	$	6,913,572
	TRANSDIGM GROUP INCORPORATED
	CONDENSED CONSOLIDATING BALANCE SHEET
	AS OF SEPTEMBER 30, 2014
	(Amounts in thousands)
			TransDigm			TransDigm			Subsidiary			Non-			Eliminations			Total
			Group			Inc.			Guarantors			Guarantor						Consolidated
												Subsidiaries
	ASSETS
	CURRENT ASSETS:
	Cash and cash equivalents		$	2,088		$	782,648		$	3,793		$	31,019		$	—		$	819,548
	Trade accounts receivable - Net			—			(305	)		1,711			351,881			(1,980	)		351,307
	Inventories - Net			—			32,287			382,016			45,471			(700	)		459,074
	Deferred income taxes			—			37,669			—			—			—			37,669
	Prepaid expenses and other			—			2,040			14,789			5,149			—			21,978
	Total current assets			2,088			854,339			402,309			433,520			(2,680	)		1,689,576
	INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES			(1,558,187	)		5,327,465			3,758,085			(59,788	)		(7,467,575	)		—
	PROPERTY, PLANT AND EQUIPMENT - Net			—			15,884			167,257			28,967			—			212,108
	GOODWILL			—			64,461			3,289,295			171,321			—			3,525,077
	TRADEMARKS AND TRADE NAMES			—			19,377			449,706			45,437			—			514,520
	OTHER INTANGIBLE ASSETS - Net			—			20,689			642,305			41,099			(1,460	)		702,633
	DEBT ISSUE COSTS - Net			—			92,155			—			238			—			92,393
	OTHER			—			7,845			11,754			942			—			20,541
	TOTAL ASSETS		$	(1,556,099	)	$	6,402,215		$	8,720,711		$	661,736		$	(7,471,715	)	$	6,756,848
	LIABILITIES AND STOCKHOLDERS’
	(DEFICIT) EQUITY
CURRENT LIABILITIES:
Current portion of long-term debt		$	—		$	39,295		$	—		$	—		$	—		$	39,295
Short-term borrowings - trade receivable securitization facility			—			—			—			200,000			—			200,000
Accounts payable			—			17,629			85,328			14,768			(1,984	)		115,741
Accrued liabilities			—			106,631			98,308			25,932			—			230,871
Total current liabilities			—			163,555			183,636			240,700			(1,984	)		585,907
LONG-TERM DEBT			—			7,233,836			—			—			—			7,233,836
DEFERRED INCOME TAXES			—			402,538			—			(291	)		—			402,247
OTHER NON-CURRENT LIABILITIES			—			42,470			42,445			6,042			—			90,957
Total liabilities			—			7,842,399			226,081			246,451			(1,984	)		8,312,947
STOCKHOLDERS’ (DEFICIT) EQUITY			(1,556,099	)		(1,440,184	)		8,494,630			415,285			(7,469,731	)		(1,556,099	)
TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY		$	(1,556,099	)	$	6,402,215		$	8,720,711		$	661,736		$	(7,471,715	)	$	6,756,848
TRANSDIGM GROUP INCORPORATED
CONDENSED CONSOLIDATING STATEMENT OF INCOME AND COMPREHENSIVE INCOME
FOR THE THIRTEEN WEEK PERIOD ENDED DECEMBER 27, 2014
(Amounts in thousands)
		TransDigm			TransDigm			Subsidiary			Non-			Eliminations			Total
		Group			Inc.			Guarantors			Guarantor						Consolidated
											Subsidiaries
NET SALES		$	—		$	31,568		$	511,507		$	46,886		$	(3,063	)	$	586,898
COST OF SALES			—			18,484			217,985			32,319			(3,063	)		265,725
GROSS PROFIT			—			13,084			293,522			14,567			—			321,173
SELLING AND ADMINISTRATIVE EXPENSES			—			15,758			43,899			7,822			—			67,479
AMORTIZATION OF INTANGIBLE ASSETS			—			347			10,701			1,978			—			13,026
INCOME (LOSS) FROM OPERATIONS			—			(3,021	)		238,922			4,767			—			240,668
INTEREST EXPENSE - Net			—			101,418			48			(2,531	)		—			98,935
EQUITY IN INCOME OF SUBSIDIARIES			(95,533	)		(165,836	)		—			—			261,369			—
INCOME BEFORE INCOME TAXES			95,533			61,397			238,874			7,298			(261,369	)		141,733
INCOME TAX PROVISION (BENEFIT)			—			(34,136	)		78,514			1,822			—			46,200
NET INCOME		$	95,533		$	95,533		$	160,360		$	5,476		$	(261,369	)	$	95,533
OTHER COMPREHENSIVE INCOME, NET OF TAX			(21,286	)		(6,709	)		(287	)		(14,290	)		21,286			(21,286	)
TOTAL COMPREHENSIVE INCOME		$	74,247		$	88,824		$	160,073		$	(8,814	)	$	(240,083	)	$	74,247
TRANSDIGM GROUP INCORPORATED
CONDENSED CONSOLIDATING STATEMENT OF INCOME AND COMPREHENSIVE INCOME
FOR THE THIRTEEN WEEK PERIOD ENDED DECEMBER 28, 2013
(Amounts in thousands)
		TransDigm			TransDigm			Subsidiary			Non-			Eliminations			Total
		Group			Inc.			Guarantors			Guarantor						Consolidated
											Subsidiaries
NET SALES		$	—		$	26,741		$	468,056		$	36,300		$	(1,775	)	$	529,322
COST OF SALES			—			15,594			206,624			24,966			(1,998	)		245,186
GROSS PROFIT			—			11,147			261,432			11,334			223			284,136
SELLING AND ADMINISTRATIVE EXPENSES			—			12,166			39,069			5,892			—			57,127
AMORTIZATION OF INTANGIBLE ASSETS			—			347			15,774			262			—			16,383
INCOME (LOSS) FROM OPERATIONS			—			(1,366	)		206,589			5,180			223			210,626
INTEREST EXPENSE - Net			—			80,646			71			136			—			80,853
EQUITY IN INCOME OF SUBSIDIARIES			(86,123	)		(129,017	)		—			—			215,140			—
INCOME BEFORE INCOME TAXES			86,123			47,005			206,518			5,044			(214,917	)		129,773
INCOME TAX PROVISION (BENEFIT)			—			(39,118	)		80,648			2,120			—			43,650
NET INCOME		$	86,123		$	86,123		$	125,870		$	2,924		$	(214,917	)	$	86,123
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX			6,711			3,807			817			2,087			(6,711	)		6,711
TOTAL COMPREHENSIVE INCOME		$	92,834		$	89,930		$	126,687		$	5,011		$	(221,628	)	$	92,834
TRANSDIGM GROUP INCORPORATED
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
FOR THE THIRTEEN WEEK PERIOD ENDED DECEMBER 27, 2014
(Amounts in thousands)
		TransDigm			TransDigm			Subsidiary			Non-			Eliminations			Total
		Group			Inc.			Guarantors			Guarantor						Consolidated
											Subsidiaries
NET CASH PROVIDED BY (USED IN)
OPERATING ACTIVITIES		$	—		$	59,985		$	142,334		$	(2,765	)	$	(10,595	)	$	188,959
INVESTING ACTIVITIES:
Capital expenditures			—			(467	)		(6,576	)		(1,095	)		—			(8,138	)
Acquisition of business, net of cash acquired			—			—			—			—			—			—
Net cash used in investing activities			—			(467	)		(6,576	)		(1,095	)		—			(8,138	)
FINANCING ACTIVITIES:
Intercompany activities			(13,663	)		146,927			(139,352	)		(4,507	)		10,595			—
Excess tax benefits related to share-based payment arrangements			8,264			—			—			—			—			8,264
Proceeds from exercise of stock options			7,391			—			—			—			—			7,391
Dividends paid			(3,365	)		—			—			—			—			(3,365	)
Other			—			(41	)		—			—			—			(41	)
Net cash provided by (used in) financing activities			(1,373	)		146,886			(139,352	)		(4,507	)		10,595			12,249
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS			—			—			—			(989	)		—			(989	)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS			(1,373	)		206,404			(3,594	)		(9,356	)		—			192,081
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD			2,088			782,648			3,793			31,019			—			819,548
CASH AND CASH EQUIVALENTS, END OF PERIOD		$	715		$	989,052		$	199		$	21,663		$	—		$	1,011,629
TRANSDIGM GROUP INCORPORATED
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
FOR THE THIRTEEN WEEK PERIOD ENDED DECEMBER 28, 2013
(Amounts in thousands)
		TransDigm			TransDigm			Subsidiary			Non-Guarantor			Eliminations			Total
		Group			Inc.			Guarantors			Subsidiaries						Consolidated
NET CASH PROVIDED BY (USED IN)
OPERATING ACTIVITIES		$	—		$	(6,676	)	$	123,148		$	2,134		$	(2,899	)	$	115,707
INVESTING ACTIVITIES:
Capital expenditures			—			(569	)		(6,892	)		(636	)		—			(8,097	)
Acquisition of business, net of cash acquired			—			(263,892	)		—			—			—			(263,892	)
Net cash used in investing activities			—			(264,461	)		(6,892	)		(636	)		—			(271,989	)
FINANCING ACTIVITIES:
Intercompany activities			(2,620	)		113,924			(117,122	)		2,919			2,899			—
Excess tax benefits related to share-based payment arrangements			3,636			—			—			—			—			3,636
Proceeds from exercise of stock options			2,893			—			—			—			—			2,893
Dividends paid			(4,139	)		—			—			—			—			(4,139	)
Other			—			(78	)		—			—			—			(78	)
Net cash provided by (used in) financing activities			(230	)		113,846			(117,122	)		2,919			2,899			2,312
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS			—			—			—			154			—			154
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS			(230	)		(157,291	)		(866	)		4,571			—			(153,816	)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD			1,313			536,863			7,900			18,664			—			564,740
CASH AND CASH EQUIVALENTS, END OF PERIOD		$	1,083		$	379,572		$	7,034		$	23,235		$	—		$	410,924

EARNINGS_PER_SHARE_TWOCLASS_ME1

EARNINGS PER SHARE (TWO-CLASS METHOD) (Tables)	3 Months Ended
	Dec. 27, 2014
Computation of Basic and Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted earnings per share (in thousands, except per share data):
		Thirteen Week Periods Ended
		December 27,			December 28,
		2014			2013
	Numerator for earnings per share:
	Net income	$	95,533		$	86,123
	Less dividends paid on participating securities		(3,365	)		(4,139	)
	Net income applicable to common stock - basic and diluted	$	92,168		$	81,984
	Denominator for basic and diluted earnings per share under the two-class method:
	Weighted average common shares outstanding		52,511			52,687
	Vested options deemed participating securities		4,080			4,304
	Total shares for basic and diluted earnings per share		56,591			56,991
	Basic and diluted earnings per share	$	1.63		$	1.44

INVENTORIES_Tables

INVENTORIES (Tables)	3 Months Ended
	Dec. 27, 2014
Inventories	Inventories consist of the following (in thousands):
		December 27,			September 30,
		2014			2014
	Raw materials and purchased component parts	$	308,443		$	298,318
	Work-in-progress		135,450			146,980
	Finished Goods		83,349			69,658
	Total		527,242			514,956
	Reserves for excess and obsolete inventory and LIFO		(56,395	)		(55,882	)
	Inventories - net	$	470,847		$	459,074

INTANGIBLE_ASSETS_Tables

INTANGIBLE ASSETS (Tables)	3 Months Ended
	Dec. 27, 2014
Intangible Assets Subject to Amortization	Intangible assets subject to amortization consist of the following (in thousands):
		December 27, 2014							September 30, 2014
		Gross Carrying		Accumulated			Net		Gross Carrying			Accumulated		Net
		Amount		Amortization					Amount			Amortization
	Technology	$	853,115	$	196,601		$	656,514	$	854,918		$	186,278	$	668,640
	Order backlog		8,006		8,006			—		8,006			6,006		2,000
	Other		43,253		11,836			31,417		43,252			11,259		31,993
	Total	$	904,374	$	216,443		$	687,931	$	906,176		$	203,543	$	702,633
Summary of Changes in Carrying Value of Goodwill	The following is a summary of changes in the carrying value of goodwill by segment from September 30, 2014 through December 27, 2014 (in thousands):
		Power &		Airframe			Non-		Total
		Control					aviation
	Balance, September 30, 2014	$	1,606,948	$	1,862,760		$	55,369	$	3,525,077
	Goodwill acquired during the year		—		—			—		—
	Purchase price allocation adjustments		—		(2,424	)		—		(2,424	)
	Other		—		(6,919	)		—		(6,919	)
	Balance, December 27, 2014	$	1,606,948	$	1,853,417		$	55,369	$	3,515,734

FAIR_VALUE_MEASUREMENTS_Tables

FAIR VALUE MEASUREMENTS (Tables)	3 Months Ended
	Dec. 27, 2014
Carrying Amounts and Fair Values of Financial Instruments	The following summarizes the carrying amounts and fair values of financial instruments (in thousands):
					December 27, 2014				September 30, 2014
			Level		Carrying		Fair Value		Carrying		Fair Value
					Amount				Amount
	Assets:
	Cash and cash equivalents			1	$	1,011,629	$	1,011,629	$	819,548	$	819,548
	Liabilities:
	Interest rate swap agreements (1)			2		24,170		24,170		20,070		20,070
	Interest rate swap agreements (2)			2		18,030		18,030		4,650		4,650
	Short-term borrowings - trade receivable securitization facility			1		200,000		200,000		200,000		200,000
	Long-term debt:
	Term loans			2		3,873,131		3,792,000		3,873,131		3,821,000
	5 1/2% Senior Subordinated Notes due 2020			1		550,000		543,000		550,000		529,000
	7 1/2% Senior Subordinated Notes due 2021			1		500,000		533,000		500,000		531,000
	6% Senior Subordinated Notes due 2022			1		1,150,000		1,150,000		1,150,000		1,121,000
	6 1/2% Senior Subordinated Notes due 2024			1		1,200,000		1,212,000		1,200,000		1,182,000
	-1	Included in Accrued liabilities on the Condensed Consolidated Balance Sheet.
	-2	Included in Other non-current liabilities on the Condensed Consolidated Balance Sheet.

SEGMENTS_Tables

SEGMENTS (Tables)	3 Months Ended
	Dec. 27, 2014
Net Sales by Reportable Segment	The following table presents net sales by reportable segment (in thousands):
		Thirteen Week Periods Ended
		December 27,		December 28,
		2014		2013
	Net sales to external customers
	Power & Control	$	283,379	$	274,050
	Airframe		281,614		231,824
	Non-aviation		21,905		23,448
		$	586,898	$	529,322
EBITDA Defined by Segment to Consolidated Income Before Taxes Operations	The following table reconciles EBITDA As Defined by segment to consolidated income from continuing operations before income taxes (in thousands):
		Thirteen Week Periods Ended
		December 27,		December 28,
		2014		2013
	EBITDA As Defined
	Power & Control	$	146,128	$	136,959
	Airframe		125,821		106,495
	Non-aviation		4,738		5,106
	Total segment EBITDA As Defined		276,687		248,560
	Unallocated corporate expenses		6,959		5,003
	Total Company EBITDA As Defined		269,728		243,557
	Depreciation and amortization		21,785		23,839
	Interest expense - net		98,935		80,853
	Acquisition-related costs		1,511		4,917
	Stock compensation expense		5,764		4,175
	Income before income taxes	$	141,733	$	129,773
Total Assets by Segment	The following table presents total assets by segment (in thousands):
		December 27,		September 30,
		2014		2014
	Total assets
	Power & Control	$	2,446,634	$	2,453,308
	Airframe		3,210,249		3,243,516
	Non-aviation		133,654		132,988
	Corporate		1,123,035		927,036
		$	6,913,572	$	6,756,848

SUPPLEMENTAL_GUARANTOR_INFORMA1

SUPPLEMENTAL GUARANTOR INFORMATION (Tables)	3 Months Ended
	Dec. 27, 2014
Supplemental Condensed Consolidating Balance Sheet	TRANSDIGM GROUP INCORPORATED
	CONDENSED CONSOLIDATING BALANCE SHEET
	AS OF DECEMBER 27, 2014
	(Amounts in thousands)
		TransDigm			TransDigm			Subsidiary			Non-			Eliminations			Total
		Group			Inc.			Guarantors			Guarantor						Consolidated
											Subsidiaries
	ASSETS
	CURRENT ASSETS:
	Cash and cash equivalents	$	715		$	989,052		$	199		$	21,663		$	—		$	1,011,629
	Trade accounts receivable - Net		—			(278	)		(3,913	)		337,701			—			333,510
	Inventories - Net		—			35,063			387,544			48,940			(700	)		470,847
	Deferred income taxes		—			36,808			—			—			—			36,808
	Prepaid expenses and other		—			1,967			16,617			4,973			—			23,557
	Total current assets		715			1,062,612			400,447			413,277			(700	)		1,876,351
	INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	$	(1,465,444	)	$	5,325,555		$	3,906,050		$	(40,870	)	$	(7,725,291	)	$	—
	PROPERTY, PLANT AND EQUIPMENT - Net		—			15,808			167,368			28,646			—			211,822
	GOODWILL		—			61,921			3,289,410			164,403			—			3,515,734
	TRADEMARKS AND TRADE NAMES		—			19,376			449,706			43,588			—			512,670
	OTHER INTANGIBLE ASSETS - Net		—			20,395			631,552			37,445			(1,461	)		687,931
	DEBT ISSUE COSTS - Net		—			88,305			—			130			—			88,435
	OTHER		—			7,810			11,866			953			—			20,629
	TOTAL ASSETS	$	(1,464,729	)	$	6,601,782		$	8,856,399		$	647,572		$	(7,727,452	)	$	6,913,572
	LIABILITIES AND STOCKHOLDERS’
	(DEFICIT) EQUITY
	CURRENT LIABILITIES:
	Current portion of long-term debt	$	—		$	39,295		$	—		$	—		$	—		$	39,295
	Short-term borrowings — trade receivable securitization facility		—			—			—			200,000			—			200,000
	Accounts payable		—			13,835			69,698			13,804			(4,627	)		92,710
	Accrued liabilities		—			207,664			83,056			22,327			—			313,047
	Total current liabilities		—			260,794			152,754			236,131			(4,627	)		645,052
	LONG-TERM DEBT		—			7,233,836			—			—			—			7,233,836
	DEFERRED INCOME TAXES		—			397,010			—			(279	)		—			396,731
	OTHER NON-CURRENT LIABILITIES		—			57,585			39,477			5,624			—			102,686
	Total liabilities		—			7,949,225			192,231			241,476			(4,627	)		8,378,305
	STOCKHOLDERS’ (DEFICIT) EQUITY		(1,464,729	)		(1,347,443	)		8,664,168			406,096			(7,722,825	)		(1,464,733	)
	TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY	$	(1,464,729	)	$	6,601,782		$	8,856,399		$	647,572		$	(7,727,452	)	$	6,913,572
	TRANSDIGM GROUP INCORPORATED
	CONDENSED CONSOLIDATING BALANCE SHEET
	AS OF SEPTEMBER 30, 2014
	(Amounts in thousands)
		TransDigm			TransDigm			Subsidiary			Non-			Eliminations			Total
		Group			Inc.			Guarantors			Guarantor						Consolidated
											Subsidiaries
	ASSETS
	CURRENT ASSETS:
	Cash and cash equivalents	$	2,088		$	782,648		$	3,793		$	31,019		$	—		$	819,548
	Trade accounts receivable - Net		—			(305	)		1,711			351,881			(1,980	)		351,307
	Inventories - Net		—			32,287			382,016			45,471			(700	)		459,074
	Deferred income taxes		—			37,669			—			—			—			37,669
	Prepaid expenses and other		—			2,040			14,789			5,149			—			21,978
	Total current assets		2,088			854,339			402,309			433,520			(2,680	)		1,689,576
	INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES		(1,558,187	)		5,327,465			3,758,085			(59,788	)		(7,467,575	)		—
	PROPERTY, PLANT AND EQUIPMENT - Net		—			15,884			167,257			28,967			—			212,108
	GOODWILL		—			64,461			3,289,295			171,321			—			3,525,077
	TRADEMARKS AND TRADE NAMES		—			19,377			449,706			45,437			—			514,520
	OTHER INTANGIBLE ASSETS - Net		—			20,689			642,305			41,099			(1,460	)		702,633
	DEBT ISSUE COSTS - Net		—			92,155			—			238			—			92,393
	OTHER		—			7,845			11,754			942			—			20,541
	TOTAL ASSETS	$	(1,556,099	)	$	6,402,215		$	8,720,711		$	661,736		$	(7,471,715	)	$	6,756,848
	LIABILITIES AND STOCKHOLDERS’
	(DEFICIT) EQUITY
	CURRENT LIABILITIES:
	Current portion of long-term debt	$	—		$	39,295		$	—		$	—		$	—		$	39,295
Short-term borrowings - trade receivable securitization facility		—			—			—			200,000			—			200,000
Accounts payable		—			17,629			85,328			14,768			(1,984	)		115,741
Accrued liabilities		—			106,631			98,308			25,932			—			230,871
Total current liabilities		—			163,555			183,636			240,700			(1,984	)		585,907
LONG-TERM DEBT		—			7,233,836			—			—			—			7,233,836
DEFERRED INCOME TAXES		—			402,538			—			(291	)		—			402,247
OTHER NON-CURRENT LIABILITIES		—			42,470			42,445			6,042			—			90,957
Total liabilities		—			7,842,399			226,081			246,451			(1,984	)		8,312,947
STOCKHOLDERS’ (DEFICIT) EQUITY		(1,556,099	)		(1,440,184	)		8,494,630			415,285			(7,469,731	)		(1,556,099	)
TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY	$	(1,556,099	)	$	6,402,215		$	8,720,711		$	661,736		$	(7,471,715	)	$	6,756,848
Supplemental Condensed Consolidating Statement of Income and Comprehensive Income	TRANSDIGM GROUP INCORPORATED
	CONDENSED CONSOLIDATING STATEMENT OF INCOME AND COMPREHENSIVE INCOME
	FOR THE THIRTEEN WEEK PERIOD ENDED DECEMBER 27, 2014
	(Amounts in thousands)
		TransDigm			TransDigm			Subsidiary			Non-			Eliminations			Total
		Group			Inc.			Guarantors			Guarantor						Consolidated
											Subsidiaries
	NET SALES	$	—		$	31,568		$	511,507		$	46,886		$	(3,063	)	$	586,898
	COST OF SALES		—			18,484			217,985			32,319			(3,063	)		265,725
	GROSS PROFIT		—			13,084			293,522			14,567			—			321,173
	SELLING AND ADMINISTRATIVE EXPENSES		—			15,758			43,899			7,822			—			67,479
	AMORTIZATION OF INTANGIBLE ASSETS		—			347			10,701			1,978			—			13,026
	INCOME (LOSS) FROM OPERATIONS		—			(3,021	)		238,922			4,767			—			240,668
	INTEREST EXPENSE - Net		—			101,418			48			(2,531	)		—			98,935
	EQUITY IN INCOME OF SUBSIDIARIES		(95,533	)		(165,836	)		—			—			261,369			—
	INCOME BEFORE INCOME TAXES		95,533			61,397			238,874			7,298			(261,369	)		141,733
	INCOME TAX PROVISION (BENEFIT)		—			(34,136	)		78,514			1,822			—			46,200
	NET INCOME	$	95,533		$	95,533		$	160,360		$	5,476		$	(261,369	)	$	95,533
	OTHER COMPREHENSIVE INCOME, NET OF TAX		(21,286	)		(6,709	)		(287	)		(14,290	)		21,286			(21,286	)
	TOTAL COMPREHENSIVE INCOME	$	74,247		$	88,824		$	160,073		$	(8,814	)	$	(240,083	)	$	74,247
	TRANSDIGM GROUP INCORPORATED
	CONDENSED CONSOLIDATING STATEMENT OF INCOME AND COMPREHENSIVE INCOME
	FOR THE THIRTEEN WEEK PERIOD ENDED DECEMBER 28, 2013
	(Amounts in thousands)
		TransDigm			TransDigm			Subsidiary			Non-			Eliminations			Total
		Group			Inc.			Guarantors			Guarantor						Consolidated
											Subsidiaries
	NET SALES	$	—		$	26,741		$	468,056		$	36,300		$	(1,775	)	$	529,322
	COST OF SALES		—			15,594			206,624			24,966			(1,998	)		245,186
	GROSS PROFIT		—			11,147			261,432			11,334			223			284,136
	SELLING AND ADMINISTRATIVE EXPENSES		—			12,166			39,069			5,892			—			57,127
	AMORTIZATION OF INTANGIBLE ASSETS		—			347			15,774			262			—			16,383
	INCOME (LOSS) FROM OPERATIONS		—			(1,366	)		206,589			5,180			223			210,626
	INTEREST EXPENSE - Net		—			80,646			71			136			—			80,853
	EQUITY IN INCOME OF SUBSIDIARIES		(86,123	)		(129,017	)		—			—			215,140			—
	INCOME BEFORE INCOME TAXES		86,123			47,005			206,518			5,044			(214,917	)		129,773
	INCOME TAX PROVISION (BENEFIT)		—			(39,118	)		80,648			2,120			—			43,650
	NET INCOME	$	86,123		$	86,123		$	125,870		$	2,924		$	(214,917	)	$	86,123
	OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX		6,711			3,807			817			2,087			(6,711	)		6,711
	TOTAL COMPREHENSIVE INCOME	$	92,834		$	89,930		$	126,687		$	5,011		$	(221,628	)	$	92,834
Supplemental Condensed Consolidating Statement of Cash Flows	TRANSDIGM GROUP INCORPORATED
	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
	FOR THE THIRTEEN WEEK PERIOD ENDED DECEMBER 27, 2014
	(Amounts in thousands)
		TransDigm			TransDigm			Subsidiary			Non-			Eliminations			Total
		Group			Inc.			Guarantors			Guarantor						Consolidated
											Subsidiaries
	NET CASH PROVIDED BY (USED IN)
	OPERATING ACTIVITIES	$	—		$	59,985		$	142,334		$	(2,765	)	$	(10,595	)	$	188,959
	INVESTING ACTIVITIES:
	Capital expenditures		—			(467	)		(6,576	)		(1,095	)		—			(8,138	)
	Acquisition of business, net of cash acquired		—			—			—			—			—			—
	Net cash used in investing activities		—			(467	)		(6,576	)		(1,095	)		—			(8,138	)
	FINANCING ACTIVITIES:
	Intercompany activities		(13,663	)		146,927			(139,352	)		(4,507	)		10,595			—
	Excess tax benefits related to share-based payment arrangements		8,264			—			—			—			—			8,264
	Proceeds from exercise of stock options		7,391			—			—			—			—			7,391
	Dividends paid		(3,365	)		—			—			—			—			(3,365	)
	Other		—			(41	)		—			—			—			(41	)
	Net cash provided by (used in) financing activities		(1,373	)		146,886			(139,352	)		(4,507	)		10,595			12,249
	EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS		—			—			—			(989	)		—			(989	)
	INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		(1,373	)		206,404			(3,594	)		(9,356	)		—			192,081
	CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD		2,088			782,648			3,793			31,019			—			819,548
	CASH AND CASH EQUIVALENTS, END OF PERIOD	$	715		$	989,052		$	199		$	21,663		$	—		$	1,011,629
	TRANSDIGM GROUP INCORPORATED
	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
	FOR THE THIRTEEN WEEK PERIOD ENDED DECEMBER 28, 2013
	(Amounts in thousands)
		TransDigm			TransDigm			Subsidiary			Non-Guarantor			Eliminations			Total
		Group			Inc.			Guarantors			Subsidiaries						Consolidated
	NET CASH PROVIDED BY (USED IN)
	OPERATING ACTIVITIES	$	—		$	(6,676	)	$	123,148		$	2,134		$	(2,899	)	$	115,707
	INVESTING ACTIVITIES:
	Capital expenditures		—			(569	)		(6,892	)		(636	)		—			(8,097	)
	Acquisition of business, net of cash acquired		—			(263,892	)		—			—			—			(263,892	)
	Net cash used in investing activities		—			(264,461	)		(6,892	)		(636	)		—			(271,989	)
	FINANCING ACTIVITIES:
	Intercompany activities		(2,620	)		113,924			(117,122	)		2,919			2,899			—
	Excess tax benefits related to share-based payment arrangements		3,636			—			—			—			—			3,636
	Proceeds from exercise of stock options		2,893			—			—			—			—			2,893
	Dividends paid		(4,139	)		—			—			—			—			(4,139	)
	Other		—			(78	)		—			—			—			(78	)
	Net cash provided by (used in) financing activities		(230	)		113,846			(117,122	)		2,919			2,899			2,312
	EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS		—			—			—			154			—			154
	INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		(230	)		(157,291	)		(866	)		4,571			—			(153,816	)
	CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD		1,313			536,863			7,900			18,664			—			564,740
	CASH AND CASH EQUIVALENTS, END OF PERIOD	$	1,083		$	379,572		$	7,034		$	23,235		$	—		$	410,924

Description_of_The_Business_Ad

Description of The Business - Additional Information (Detail)	3 Months Ended
	Dec. 27, 2014
Nature Of Business [Line Items]
Percentage of ownership in subsidiary	100.00%
5 1/2% Senior Subordinated Notes, Due 2020
Nature Of Business [Line Items]
Interest rate of senior subordinated debt	5.50%
7 1/2% Senior Subordinated Notes, Due 2021
Nature Of Business [Line Items]
Interest rate of senior subordinated debt	7.50%
6.00% Senior Subordinated Notes, Due 2022
Nature Of Business [Line Items]
Interest rate of senior subordinated debt	6.00%
6 1/2% Senior Subordinated Notes, Due 2024
Nature Of Business [Line Items]
Interest rate of senior subordinated debt	6.50%

Acquisitions_Additional_Inform

Acquisitions - Additional Information (Detail) (USD $)	3 Months Ended	0 Months Ended
	Dec. 27, 2014	Mar. 06, 2014	Dec. 19, 2013	Sep. 30, 2014	Mar. 29, 2014
Business Acquisition [Line Items]
Amount of goodwill expected to be non deductible for tax	3,515,734,000			$3,525,077,000
Minimum
Business Acquisition [Line Items]
Estimated useful life of aircraft (in years)	25 years
Maximum
Business Acquisition [Line Items]
Estimated useful life of aircraft (in years)	30 years
Elektro-Metall Export GmbH
Business Acquisition [Line Items]
Business acquisition cost		49,600,000
Cash consideration paid to acquire business		40,400,000
Business acquisition, assumption of net indebtedness		9,200,000
Amount of goodwill expected to be non deductible for tax		20,300,000
Airborne Systems Inc
Business Acquisition [Line Items]
Cash consideration paid to acquire business			264,200,000
Amount of goodwill expected to be non deductible for tax			155,900,000
Business acquisition, purchase price adjustment					$300,000

Computation_of_Basic_and_Dilut

Computation of Basic and Diluted Earnings Per Share (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013
Numerator for earnings per share:
Net income	$95,533	$86,123
Less dividends paid on participating securities	-3,365	-4,139
Net income applicable to common stock - basic and diluted	$92,168	$81,984
Denominator for basic and diluted earnings per share under the two-class method:
Weighted average common shares outstanding	52,511	52,687
Vested options deemed participating securities	4,080	4,304
Total shares for basic and diluted earnings per share	56,591	56,991
Basic and diluted earnings per share	$1.63	$1.44

Inventories_Additional_Informa

Inventories - Additional Information (Detail) (Maximum)	Dec. 27, 2014
Maximum
Inventory [Line Items]
Percentage of inventory valued under LIFO method	4.00%

Inventories_Detail

Inventories (Detail) (USD $)	Dec. 27, 2014	Sep. 30, 2014
In Thousands, unless otherwise specified
Inventory [Line Items]
Raw materials and purchased component parts	$308,443	$298,318
Work-in-progress	135,450	146,980
Finished Goods	83,349	69,658
Total	527,242	514,956
Reserves for excess and obsolete inventory and LIFO	-56,395	-55,882
Inventories - net	$470,847	$459,074

Intangible_Assets_Subject_to_A

Intangible Assets Subject to Amortization (Detail) (USD $)	Dec. 27, 2014	Sep. 30, 2014
In Thousands, unless otherwise specified
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$904,374	$906,176
Accumulated Amortization	216,443	203,543
Net	687,931	702,633
Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	853,115	854,918
Accumulated Amortization	196,601	186,278
Net	656,514	668,640
Order backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,006	8,006
Accumulated Amortization	8,006	6,006
Net		2,000
Other intangible assets
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	43,253	43,252
Accumulated Amortization	11,836	11,259
Net	$31,417	$31,993

Intangible_Assets_Additional_I

Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended
	Dec. 27, 2014	Dec. 28, 2013
Schedule of Intangible Assets Disclosure [Line Items]
Aggregate amortization expense	$13,357,000	$16,435,000
Estimated Amortization Expense, 2015	46,300,000
Estimated Amortization Expense, 2016	44,300,000
Estimated Amortization Expense, 2017	44,300,000
Estimated Amortization Expense, 2018	44,300,000
Estimated Amortization Expense, 2019	44,300,000
Estimated Amortization Expense, 2020	$44,300,000

Summary_of_Changes_in_Carrying

Summary of Changes in Carrying Value of Goodwill (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 27, 2014
Goodwill [Line Items]
Goodwill, Beginning Balance	$3,525,077
Goodwill acquired during the year	0
Purchase price allocation adjustments	-2,424
Other	-6,919
Goodwill, Ending Balance	3,515,734
Power & Control
Goodwill [Line Items]
Goodwill, Beginning Balance	1,606,948
Goodwill acquired during the year	0
Goodwill, Ending Balance	1,606,948
Airframe
Goodwill [Line Items]
Goodwill, Beginning Balance	1,862,760
Goodwill acquired during the year	0
Purchase price allocation adjustments	-2,424
Other	-6,919
Goodwill, Ending Balance	1,853,417
Non-aviation
Goodwill [Line Items]
Goodwill, Beginning Balance	55,369
Goodwill acquired during the year	0
Goodwill, Ending Balance	$55,369

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013	Sep. 30, 2014
Income Tax Contingency [Line Items]
Effective income tax rate	32.60%	33.60%
Unrecognized tax benefit	$12.30		$13.90
Effect of unrecognized tax benefits on effective tax rate	11.8		13.5
Unrecognized Tax Benefits, Period Increase (Decrease) over the next 12 months	($2.70)
Earliest Tax Year
Income Tax Contingency [Line Items]
Tax year under examination	2012
Latest Tax Year
Income Tax Contingency [Line Items]
Tax year under examination	2013

Carrying_Amounts_and_Fair_Valu

Carrying Amounts and Fair Values of Financial Instruments (Detail) (USD $)	Dec. 27, 2014		Sep. 30, 2014		Dec. 28, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Cash and cash equivalents, Assets, Carrying Amount	$1,011,629		$819,548		$410,924	$564,740
Short-term borrowings - trade receivable securitization facility, Carrying Amount	200,000		200,000
Accrued Liabilities
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Interest rate swap agreements, Liabilities, Carrying Amount	24,170	[1]	20,070	[1]
Other Non-Current Liabilities
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Interest rate swap agreements, Liabilities, Carrying Amount	18,030	[2]	4,650	[2]
Term Loans
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Long-term debt, Carrying Amount	3,873,131		3,873,131
5 1/2% Senior Subordinated Notes, Due 2020
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Long-term debt, Carrying Amount	550,000		550,000
7 1/2% Senior Subordinated Notes, Due 2021
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Long-term debt, Carrying Amount	500,000		500,000
6.00% Senior Subordinated Notes, Due 2022
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Long-term debt, Carrying Amount	1,150,000		1,150,000
6 1/2% Senior Subordinated Notes, Due 2024
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Long-term debt, Carrying Amount	1,200,000		1,200,000
Level 1
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Cash and cash equivalents, Assets, Fair Value	1,011,629		819,548
Short-term borrowings - trade receivable securitization facility, Fair Value	200,000		200,000
Level 1 | 5 1/2% Senior Subordinated Notes, Due 2020
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Long-term debt, Fair Value	543,000		529,000
Level 1 | 7 1/2% Senior Subordinated Notes, Due 2021
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Long-term debt, Fair Value	533,000		531,000
Level 1 | 6.00% Senior Subordinated Notes, Due 2022
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Long-term debt, Fair Value	1,150,000		1,121,000
Level 1 | 6 1/2% Senior Subordinated Notes, Due 2024
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Long-term debt, Fair Value	1,212,000		1,182,000
Level 2 | Accrued Liabilities
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Interest rate swap agreements, Liabilities, Fair Value	24,170	[1]	20,070	[1]
Level 2 | Other Non-Current Liabilities
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Interest rate swap agreements, Liabilities, Fair Value	18,030	[2]	4,650	[2]
Level 2 | Term Loans
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Long-term debt, Fair Value	$3,792,000		$3,821,000
[1]	Included in Accrued liabilities on the Condensed Consolidated Balance Sheet.
[2]	Included in Other non-current liabilities on the Condensed Consolidated Balance Sheet.

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail)	3 Months Ended
	Dec. 27, 2014
5 1/2% Senior Subordinated Notes, Due 2020
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Senior subordinate note, due date	2020
7 1/2% Senior Subordinated Notes, Due 2021
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Senior subordinate note, due date	2021
6.00% Senior Subordinated Notes, Due 2022
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Senior subordinate note, due date	2022
6 1/2% Senior Subordinated Notes, Due 2024
Carrying Amounts and Fair Values of Financial Instruments [Line Items]
Senior subordinate note, due date	2024

Recovered_Sheet1

Derivatives and Hedging Activities - Additional Information (Detail) (USD $)	3 Months Ended	0 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2014	Dec. 27, 2014
Derivative [Line Items]
Derivative loss to be recognized	$18.40
Forward-starting interest rate swap agreements beginning March 31, 2016
Derivative [Line Items]
Number of interest rate swap agreements	5	5
Interest rate swap, notional amount	750	750
Fixed rate of interest under interest rate swap	5.80%	5.80%
Interest rate swap agreements description		2.8% plus the 3% margin percentage
Interest rate swap agreements beginning September 30, 2014
Derivative [Line Items]
Number of interest rate swap agreements	3	3
Interest rate swap, notional amount	1,000	1,000
Fixed rate of interest under interest rate swap	5.40%	5.40%
Interest rate swap agreements description	2.4% plus the 3% margin percentage
Interest rate swap agreements to swap variable rates on the credit facility for a fixed rate
Derivative [Line Items]
Number of interest rate swap agreements	3	3
Interest rate swap, notional amount	$353	$353
Fixed rate of interest under interest rate swap	5.17%	5.17%
Interest rate swap agreements description	2.17% plus the 3% margin percentage

Segment_Information_Additional

Segment Information - Additional Information (Detail)	3 Months Ended
	Dec. 27, 2014
	Segment
Segment Reporting Information [Line Items]
Number of reporting segments	3

Net_Sales_by_Reportable_Segmen

Net Sales by Reportable Segment (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013
Segment Reporting Information [Line Items]
NET SALES	$586,898	$529,322
Operating Segments | Power & Control
Segment Reporting Information [Line Items]
NET SALES	283,379	274,050
Operating Segments | Airframe
Segment Reporting Information [Line Items]
NET SALES	281,614	231,824
Operating Segments | Non-aviation
Segment Reporting Information [Line Items]
NET SALES	$21,905	$23,448

EBITDA_Defined_by_Segment_to_C

EBITDA Defined by Segment to Consolidated Income Before Taxes Operations (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013
Segment Reporting, Reconciliation of Operating Income Segment to Consolidated [Line Items]
Earnings before interest taxes depreciation and amortization	$269,728	$243,557
Depreciation and amortization	21,785	23,839
Interest expense-net	98,935	80,853
Acquisition-related costs	1,511	4,917
Stock compensation expense	5,764	4,175
Income before income taxes	141,733	129,773
Operating Segments
Segment Reporting, Reconciliation of Operating Income Segment to Consolidated [Line Items]
Earnings before interest taxes depreciation and amortization	276,687	248,560
Operating Segments | Power & Control
Segment Reporting, Reconciliation of Operating Income Segment to Consolidated [Line Items]
Earnings before interest taxes depreciation and amortization	146,128	136,959
Operating Segments | Airframe
Segment Reporting, Reconciliation of Operating Income Segment to Consolidated [Line Items]
Earnings before interest taxes depreciation and amortization	125,821	106,495
Operating Segments | Non-aviation
Segment Reporting, Reconciliation of Operating Income Segment to Consolidated [Line Items]
Earnings before interest taxes depreciation and amortization	4,738	5,106
Corporate, Non-Segment
Segment Reporting, Reconciliation of Operating Income Segment to Consolidated [Line Items]
Unallocated corporate expenses	$6,959	$5,003

Total_Assets_by_Segment_Detail

Total Assets by Segment (Detail) (USD $)	Dec. 27, 2014	Sep. 30, 2014
In Thousands, unless otherwise specified
Total Assets By Segment [Line Items]
Total assets	$6,913,572	$6,756,848
Operating Segments | Power & Control
Total Assets By Segment [Line Items]
Total assets	2,446,634	2,453,308
Operating Segments | Airframe
Total Assets By Segment [Line Items]
Total assets	3,210,249	3,243,516
Operating Segments | Non-aviation
Total Assets By Segment [Line Items]
Total assets	133,654	132,988
Corporate, Non-Segment
Total Assets By Segment [Line Items]
Total assets	$1,123,035	$927,036

Supplemental_Condensed_Consoli

Supplemental Condensed Consolidating Balance Sheet (Detail) (USD $)	Dec. 27, 2014	Sep. 30, 2014	Dec. 28, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	$1,011,629	$819,548	$410,924	$564,740
Trade accounts receivable - Net	333,510	351,307
Inventories - Net	470,847	459,074
Deferred income taxes	36,808	37,669
Prepaid expenses and other	23,557	21,978
Total current assets	1,876,351	1,689,576
PROPERTY, PLANT AND EQUIPMENT - Net	211,822	212,108
GOODWILL	3,515,734	3,525,077
TRADEMARKS AND TRADE NAMES	512,670	514,520
OTHER INTANGIBLE ASSETS - Net	687,931	702,633
DEBT ISSUE COSTS - Net	88,435	92,393
OTHER	20,629	20,541
TOTAL ASSETS	6,913,572	6,756,848
Current portion of long-term debt	39,295	39,295
Short-term borrowings - trade receivable securitization facility	200,000	200,000
Accounts payable	92,710	115,741
Accrued liabilities	313,047	230,871
Total current liabilities	645,052	585,907
LONG-TERM DEBT	7,233,836	7,233,836
DEFERRED INCOME TAXES	396,731	402,247
OTHER NON-CURRENT LIABILITIES	102,686	90,957
Total liabilities	8,378,305	8,312,947
STOCKHOLDERS' (DEFICIT) EQUITY	-1,464,733	-1,556,099
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY	6,913,572	6,756,848
TransDigm Group
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	715	2,088	1,083	1,313
Total current assets	715	2,088
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	-1,465,444	-1,558,187
TOTAL ASSETS	-1,464,729	-1,556,099
STOCKHOLDERS' (DEFICIT) EQUITY	-1,464,729	-1,556,099
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY	-1,464,729	-1,556,099
TransDigm Inc.
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	989,052	782,648	379,572	536,863
Trade accounts receivable - Net	-278	-305
Inventories - Net	35,063	32,287
Deferred income taxes	36,808	37,669
Prepaid expenses and other	1,967	2,040
Total current assets	1,062,612	854,339
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	5,325,555	5,327,465
PROPERTY, PLANT AND EQUIPMENT - Net	15,808	15,884
GOODWILL	61,921	64,461
TRADEMARKS AND TRADE NAMES	19,376	19,377
OTHER INTANGIBLE ASSETS - Net	20,395	20,689
DEBT ISSUE COSTS - Net	88,305	92,155
OTHER	7,810	7,845
TOTAL ASSETS	6,601,782	6,402,215
Current portion of long-term debt	39,295	39,295
Accounts payable	13,835	17,629
Accrued liabilities	207,664	106,631
Total current liabilities	260,794	163,555
LONG-TERM DEBT	7,233,836	7,233,836
DEFERRED INCOME TAXES	397,010	402,538
OTHER NON-CURRENT LIABILITIES	57,585	42,470
Total liabilities	7,949,225	7,842,399
STOCKHOLDERS' (DEFICIT) EQUITY	-1,347,443	-1,440,184
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY	6,601,782	6,402,215
Subsidiary Guarantors
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	199	3,793	7,034	7,900
Trade accounts receivable - Net	-3,913	1,711
Inventories - Net	387,544	382,016
Prepaid expenses and other	16,617	14,789
Total current assets	400,447	402,309
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	3,906,050	3,758,085
PROPERTY, PLANT AND EQUIPMENT - Net	167,368	167,257
GOODWILL	3,289,410	3,289,295
TRADEMARKS AND TRADE NAMES	449,706	449,706
OTHER INTANGIBLE ASSETS - Net	631,552	642,305
OTHER	11,866	11,754
TOTAL ASSETS	8,856,399	8,720,711
Accounts payable	69,698	85,328
Accrued liabilities	83,056	98,308
Total current liabilities	152,754	183,636
OTHER NON-CURRENT LIABILITIES	39,477	42,445
Total liabilities	192,231	226,081
STOCKHOLDERS' (DEFICIT) EQUITY	8,664,168	8,494,630
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY	8,856,399	8,720,711
Non-Guarantor Subsidiaries
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	21,663	31,019	23,235	18,664
Trade accounts receivable - Net	337,701	351,881
Inventories - Net	48,940	45,471
Prepaid expenses and other	4,973	5,149
Total current assets	413,277	433,520
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	-40,870	-59,788
PROPERTY, PLANT AND EQUIPMENT - Net	28,646	28,967
GOODWILL	164,403	171,321
TRADEMARKS AND TRADE NAMES	43,588	45,437
OTHER INTANGIBLE ASSETS - Net	37,445	41,099
DEBT ISSUE COSTS - Net	130	238
OTHER	953	942
TOTAL ASSETS	647,572	661,736
Short-term borrowings - trade receivable securitization facility	200,000	200,000
Accounts payable	13,804	14,768
Accrued liabilities	22,327	25,932
Total current liabilities	236,131	240,700
DEFERRED INCOME TAXES	-279	-291
OTHER NON-CURRENT LIABILITIES	5,624	6,042
Total liabilities	241,476	246,451
STOCKHOLDERS' (DEFICIT) EQUITY	406,096	415,285
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY	647,572	661,736
Eliminations
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	0
Trade accounts receivable - Net		-1,980
Inventories - Net	-700	-700
Total current assets	-700	-2,680
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	-7,725,291	-7,467,575
OTHER INTANGIBLE ASSETS - Net	-1,461	-1,460
TOTAL ASSETS	-7,727,452	-7,471,715
Accounts payable	-4,627	-1,984
Total current liabilities	-4,627	-1,984
Total liabilities	-4,627	-1,984
STOCKHOLDERS' (DEFICIT) EQUITY	-7,722,825	-7,469,731
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY	($7,727,452)	($7,471,715)

Supplemental_Condensed_Consoli1

Supplemental Condensed Consolidating Statement of Income and Comprehensive Income (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013
Supplemental Guarantor Information [Line Items]
NET SALES	$586,898	$529,322
COST OF SALES	265,725	245,186
GROSS PROFIT	321,173	284,136
SELLING AND ADMINISTRATIVE EXPENSES	67,479	57,127
AMORTIZATION OF INTANGIBLE ASSETS	13,026	16,383
INCOME (LOSS) FROM OPERATIONS	240,668	210,626
INTEREST EXPENSE - Net	98,935	80,853
Income before income taxes	141,733	129,773
INCOME TAX PROVISION (BENEFIT)	46,200	43,650
Net income	95,533	86,123
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	-21,286	6,711
TOTAL COMPREHENSIVE INCOME	74,247	92,834
TransDigm Group
Supplemental Guarantor Information [Line Items]
EQUITY IN INCOME OF SUBSIDIARIES	-95,533	-86,123
Income before income taxes	95,533	86,123
Net income	95,533	86,123
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	-21,286	6,711
TOTAL COMPREHENSIVE INCOME	74,247	92,834
TransDigm Inc.
Supplemental Guarantor Information [Line Items]
NET SALES	31,568	26,741
COST OF SALES	18,484	15,594
GROSS PROFIT	13,084	11,147
SELLING AND ADMINISTRATIVE EXPENSES	15,758	12,166
AMORTIZATION OF INTANGIBLE ASSETS	347	347
INCOME (LOSS) FROM OPERATIONS	-3,021	-1,366
INTEREST EXPENSE - Net	101,418	80,646
EQUITY IN INCOME OF SUBSIDIARIES	-165,836	-129,017
Income before income taxes	61,397	47,005
INCOME TAX PROVISION (BENEFIT)	-34,136	-39,118
Net income	95,533	86,123
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	-6,709	3,807
TOTAL COMPREHENSIVE INCOME	88,824	89,930
Subsidiary Guarantors
Supplemental Guarantor Information [Line Items]
NET SALES	511,507	468,056
COST OF SALES	217,985	206,624
GROSS PROFIT	293,522	261,432
SELLING AND ADMINISTRATIVE EXPENSES	43,899	39,069
AMORTIZATION OF INTANGIBLE ASSETS	10,701	15,774
INCOME (LOSS) FROM OPERATIONS	238,922	206,589
INTEREST EXPENSE - Net	48	71
Income before income taxes	238,874	206,518
INCOME TAX PROVISION (BENEFIT)	78,514	80,648
Net income	160,360	125,870
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	-287	817
TOTAL COMPREHENSIVE INCOME	160,073	126,687
Non-Guarantor Subsidiaries
Supplemental Guarantor Information [Line Items]
NET SALES	46,886	36,300
COST OF SALES	32,319	24,966
GROSS PROFIT	14,567	11,334
SELLING AND ADMINISTRATIVE EXPENSES	7,822	5,892
AMORTIZATION OF INTANGIBLE ASSETS	1,978	262
INCOME (LOSS) FROM OPERATIONS	4,767	5,180
INTEREST EXPENSE - Net	-2,531	136
Income before income taxes	7,298	5,044
INCOME TAX PROVISION (BENEFIT)	1,822	2,120
Net income	5,476	2,924
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	-14,290	2,087
TOTAL COMPREHENSIVE INCOME	-8,814	5,011
Eliminations
Supplemental Guarantor Information [Line Items]
NET SALES	-3,063	-1,775
COST OF SALES	-3,063	-1,998
GROSS PROFIT		223
INCOME (LOSS) FROM OPERATIONS		223
EQUITY IN INCOME OF SUBSIDIARIES	261,369	215,140
Income before income taxes	-261,369	-214,917
Net income	-261,369	-214,917
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	21,286	-6,711
TOTAL COMPREHENSIVE INCOME	($240,083)	($221,628)

Supplemental_Condensed_Consoli2

Supplemental Condensed Consolidating Statement of Cash Flows (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013
Supplemental Guarantor Information [Line Items]
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	$188,959	$115,707
Capital expenditures	-8,138	-8,097
Acquisition of business, net of cash acquired		-263,892
Net cash used in investing activities	-8,138	-271,989
Excess tax benefits related to share-based payment arrangements	8,264	3,636
Proceeds from exercise of stock options	7,391	2,893
Dividends paid	-3,365	-4,139
Other	-41	-78
Net cash provided by (used in) financing activities	12,249	2,312
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	-989	154
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	192,081	-153,816
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	819,548	564,740
CASH AND CASH EQUIVALENTS, END OF PERIOD	1,011,629	410,924
TransDigm Group
Supplemental Guarantor Information [Line Items]
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	0
Intercompany activities	-13,663	-2,620
Excess tax benefits related to share-based payment arrangements	8,264	3,636
Proceeds from exercise of stock options	7,391	2,893
Dividends paid	-3,365	-4,139
Net cash provided by (used in) financing activities	-1,373	-230
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	-1,373	-230
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	2,088	1,313
CASH AND CASH EQUIVALENTS, END OF PERIOD	715	1,083
TransDigm Inc.
Supplemental Guarantor Information [Line Items]
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	59,985	-6,676
Capital expenditures	-467	-569
Acquisition of business, net of cash acquired		-263,892
Net cash used in investing activities	-467	-264,461
Intercompany activities	146,927	113,924
Other	-41	-78
Net cash provided by (used in) financing activities	146,886	113,846
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	206,404	-157,291
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	782,648	536,863
CASH AND CASH EQUIVALENTS, END OF PERIOD	989,052	379,572
Subsidiary Guarantors
Supplemental Guarantor Information [Line Items]
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	142,334	123,148
Capital expenditures	-6,576	-6,892
Net cash used in investing activities	-6,576	-6,892
Intercompany activities	-139,352	-117,122
Net cash provided by (used in) financing activities	-139,352	-117,122
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	-3,594	-866
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	3,793	7,900
CASH AND CASH EQUIVALENTS, END OF PERIOD	199	7,034
Non-Guarantor Subsidiaries
Supplemental Guarantor Information [Line Items]
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	-2,765	2,134
Capital expenditures	-1,095	-636
Net cash used in investing activities	-1,095	-636
Intercompany activities	-4,507	2,919
Net cash provided by (used in) financing activities	-4,507	2,919
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	-989	154
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	-9,356	4,571
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	31,019	18,664
CASH AND CASH EQUIVALENTS, END OF PERIOD	21,663	23,235
Eliminations
Supplemental Guarantor Information [Line Items]
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	-10,595	-2,899
Intercompany activities	10,595	2,899
Net cash provided by (used in) financing activities	10,595	2,899
CASH AND CASH EQUIVALENTS, END OF PERIOD	$0