TransDigm (TDG) 10-Q 5 Feb 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Dec. 28, 2013	Jan. 25, 2014
Document Information [Line Items]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	28-Dec-13	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Trading Symbol	'TDG	'
Entity Registrant Name	'TRANSDIGM GROUP INC	'
Entity Central Index Key	'0001260221	'
Current Fiscal Year End Date	'--09-30	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	52,767,714

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Dec. 28, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
CURRENT ASSETS:	'	'
Cash and cash equivalents	$410,924	$564,740
Trade accounts receivable - Net	322,439	290,449
Inventories - Net	443,051	413,581
Deferred income taxes	28,431	30,182
Prepaid expenses and other	16,248	21,543
Total current assets	1,221,093	1,320,495
PROPERTY, PLANT AND EQUIPMENT - Net	219,222	208,964
GOODWILL	3,489,842	3,343,907
TRADEMARKS AND TRADE NAMES	530,668	485,690
OTHER INTANGIBLE ASSETS - Net	747,359	703,800
DEBT ISSUE COSTS - Net	70,551	72,668
OTHER	13,752	13,355
TOTAL ASSETS	6,292,487	6,148,879
CURRENT LIABILITIES:	'	'
Current portion of long-term debt	31,045	31,045
Accounts payable	90,505	106,768
Accrued liabilities	217,099	184,687
Total current liabilities	338,649	322,500
LONG-TERM DEBT	5,700,193	5,700,193
DEFERRED INCOME TAXES	417,344	384,301
OTHER NON-CURRENT LIABILITIES	70,483	78,266
Total liabilities	6,526,669	6,485,260
STOCKHOLDERS' (DEFICIT) EQUITY:	'	'
Common stock - $.01 par value; authorized 224,400,000 shares; issued 53,240,219 and 53,172,551 at December 28, 2013 and September 30, 2013, respectively	532	532
Additional paid-in capital	700,639	689,935
Accumulated deficit	-919,460	-1,004,244
Accumulated other comprehensive income (loss)	195	-6,516
Treasury stock, at cost; 505,400 shares at December 28, 2013 and September 30, 2013	-16,088	-16,088
Total stockholders' (deficit) equity	-234,182	-336,381
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY	$6,292,487	$6,148,879

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 28, 2013	Sep. 30, 2013
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	224,400,000	224,400,000
Common stock, shares issued	53,240,219	53,172,551
Treasury stock, shares	505,400	505,400

Condensed_Consolidated_Stateme

Condensed Consolidated Statements Of Income (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
NET SALES	$529,322	$430,418
COST OF SALES	245,186	191,871
GROSS PROFIT	284,136	238,547
SELLING AND ADMINISTRATIVE EXPENSES	57,127	55,161
AMORTIZATION OF INTANGIBLE ASSETS	16,383	10,540
INCOME FROM OPERATIONS	210,626	172,846
INTEREST EXPENSE - Net	80,853	62,876
INCOME BEFORE INCOME TAXES	129,773	109,970
INCOME TAX PROVISION	43,650	35,800
NET INCOME	86,123	74,170
NET INCOME APPLICABLE TO COMMON STOCK	$81,984	$36,040
Net earnings per share - see Note 5:	'	'
Basic and diluted	$1.44	$0.66
Cash dividends paid per common share	'	$12.85
Weighted-average shares outstanding:	'	'
Basic and diluted	56,991	54,453

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements Of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Net income	$86,123	$74,170
Other comprehensive income, net of tax:	'	'
Foreign currency translation adjustments	2,647	2,052
Interest rate swap agreements, net of taxes of $1.8 million for the thirteen week period ended December 28, 2013	4,064	'
Other	'	-214
Other comprehensive income, net of tax	6,711	1,838
TOTAL COMPREHENSIVE INCOME	$92,834	$76,008

Condensed_Consolidated_Stateme2

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

Condensed_Consolidated_Stateme3

Condensed Consolidated Statement Of Changes In Stockholders' (Deficit) Equity (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, 2013	($336,381)	$532	$689,935	($1,004,244)	($6,516)	($16,088)
BEGINNING BALANCE (in shares) at Sep. 30, 2013	'	53,172,551	'	'	'	-505,400
Unvested dividend equivalents	-1,339	'	'	-1,339	'	'
Compensation expense recognized for employee stock options	4,175	'	4,175	'	'	'
Excess tax benefits related to share-based payment arrangements	3,636	'	3,636	'	'	'
Exercise of employee stock options (in shares)	'	67,668	'	'	'	'
Exercise of employee stock options	2,893	'	2,893	'	'	'
Net income	86,123	'	'	86,123	'	'
Interest rate swaps, net of tax	4,064	'	'	'	4,064	'
Foreign currency translation adjustments	2,647	'	'	'	2,647	'
ENDING BALANCE at Dec. 28, 2013	($234,182)	$532	$700,639	($919,460)	$195	($16,088)
ENDING BALANCE (in shares) at Dec. 28, 2013	'	53,240,219	'	'	'	-505,400

Condensed_Consolidated_Stateme4

Condensed Consolidated Statements Of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
OPERATING ACTIVITIES:	'	'
Net income	$86,123	$74,170
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation	7,404	6,868
Amortization of intangible assets	16,435	10,584
Amortization of debt issue costs	3,085	3,796
Non-cash equity compensation	4,175	7,131
Excess tax benefits related to share-based payment arrangements	-3,636	-26,688
Deferred income taxes	-87	1,258
Changes in assets/liabilities, net of effects from acquisitions of businesses:	'	'
Trade accounts receivable	-3,034	17,321
Inventories	-2,216	-11,521
Income taxes receivable/payable	45,118	33,949
Other assets	3,156	3,045
Accounts payable	-24,773	-4,405
Accrued and other liabilities	-16,043	-17,393
Net cash provided by operating activities	115,707	98,115
INVESTING ACTIVITIES:	'	'
Capital expenditures	-8,097	-8,677
Acquisition of businesses, net of cash acquired	-263,892	134
Cash proceeds from sale of investment	'	5,000
Net cash used in investing activities	-271,989	-3,543
FINANCING ACTIVITIES:	'	'
Excess tax benefits related to share-based payment arrangements	3,636	26,688
Proceeds from exercise of stock options	2,893	5,541
Dividends paid	-4,139	-702,406
Proceeds from 2011 credit facility - net	'	147,373
Proceeds from senior subordinated notes due 2020 - net	'	542,000
Other	-78	'
Net cash provided by (used in) financing activities	2,312	19,196
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	154	139
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	-153,816	113,907
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	564,740	440,524
CASH AND CASH EQUIVALENTS, END OF PERIOD	410,924	554,431
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:	'	'
Cash paid during the period for interest	77,125	67,772
Cash paid during the period for income taxes	$306	$895

Description_of_the_Business

Description of the Business	3 Months Ended
	Dec. 28, 2013
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 7 3/4% Senior Subordinated Notes due 2018, 5 1/2% Senior Subordinated Notes due 2020 and 7 1/2% Senior Subordinated Notes due 2021 are fully and unconditionally guaranteed on a senior subordinated basis by TD Group and all existing 100% owned domestic subsidiaries of TransDigm Inc. 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. 28, 2013
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, 2013 included in TD Group’s Form 10-K dated November 15, 2013. 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, 2013 condensed consolidated balance sheet was derived from TD Group’s audited financial statements. The results of operations for the thirteen week period ended December 28, 2013 are not necessarily indicative of the results to be expected for the full year.

Acquisitions

Acquisitions	3 Months Ended
	Dec. 28, 2013
Acquisitions	'
	3	ACQUISITIONS
	Airborne Global Inc. – On December 19, 2013, TransDigm Inc. acquired all of the outstanding stock of Airborne Global Inc. (“Airborne”) for approximately $263.8 million in cash, which comprises the $250 million contract price plus estimated cash and working capital at closing and which is subject to adjustments based on the actual level of cash and working capital as of the closing date of the acquisition. 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 $140 million of goodwill recognized for the acquisition will not be deductible for tax purposes.
	Whippany Actuation Systems, LLC – On June 28, 2013, Whippany Actuation Systems, LLC, a newly formed subsidiary of TransDigm Inc., acquired assets from GE Aviation’s Electromechanical Actuation Division (“Whippany Actuation”) for approximately $151.5 million in cash, which includes a purchase price adjustment of $2.7 million paid in the first quarter of fiscal 2014. Whippany Actuation manufactures proprietary, highly engineered aerospace electromechanical motion control subsystems for civil and military applications with product offerings including control electronics, motors, high power mechanical transmissions and actuators. These products fit well with TransDigm’s overall business direction. Whippany is included in TransDigm’s Power & Control segment. The Company expects that the approximately $103 million of goodwill recognized for the acquisition will be deductible for tax purposes.
	Arkwin Industries, Inc. – On June 5, 2013, TransDigm Inc. acquired all of the outstanding stock of Arkwin Industries, Inc. (“Arkwin”), for approximately $285.7 million in cash, which includes a purchase price adjustment of $0.2 million received in the fourth quarter of fiscal 2013. Arkwin manufactures proprietary, highly engineered aerospace hydraulic and fuel system components for commercial and military aircraft, helicopters and other specialty applications. These products fit well with TransDigm’s overall business direction. Arkwin is included in TransDigm’s Power & Control segment. The Company expects that the approximately $185 million of goodwill recognized for the acquisition will not be deductible for tax purposes.
	Aerosonic Corporation – On June 5, 2013, Buccaneer Acquisition Sub Inc., a newly formed subsidiary of TransDigm Inc., completed the tender offer of a majority of the outstanding stock of Aerosonic Corporation (“Aerosonic”). Buccaneer Acquisition Sub Inc. was subsequently merged into Aerosonic on June 10, 2013; in connection therewith, all outstanding shares of Aerosonic were cancelled and Aerosonic became a wholly owned subsidiary of TransDigm Inc. The aggregate price paid in the tender offer and merger was approximately $39.8 million in cash. Aerosonic designs and manufactures proprietary, highly engineered mechanical and digital altimeters, airspeed indicators, rate of climb indicators, microprocessor controlled air data test sets, angle of attack stall warning systems, integrated air data sensors and other aircraft sensors, monitoring systems and flight instrumentation for use on commercial and military aircraft. These products fit well with TransDigm’s overall business direction. Aerosonic is included in TransDigm’s Airframe segment. The Company expects that the approximately $14 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 Airborne, Whippany Actuation, Arkwin and Aerosonic; therefore, the values attributed to those acquired assets in the 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 28, 2013 or December 29, 2012 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 30 years.

Earnings_Per_Share_TwoClass_Me

Earnings Per Share (Two-Class Method)	3 Months Ended
	Dec. 28, 2013
Earnings Per Share (Two-Class Method)	'
	4	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 28,			December 29,
			2013			2012
	Numerator for earnings per share:
	Net income		$	86,123		$	74,170
	Less dividends on participating securities			(4,139	)		(38,130	)
	Net income applicable to common stock - basic and diluted		$	81,984		$	36,040
	Denominator for basic and diluted earnings per share under the two-class method:
	Weighted average common shares outstanding			52,687			51,796
	Vested options deemed participating securities			4,304			2,657
	Total shares for basic and diluted earnings per share			56,991			54,453
	Basic and diluted earnings per share		$	1.44		$	0.66

Inventories

Inventories	3 Months Ended
	Dec. 28, 2013
Inventories	'
	5	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 5% of the inventory was valued under the LIFO method at December 28, 2013.
	Inventories consist of the following (in thousands):
			December 28,			September 30,
			2013			2013
	Raw materials and purchased component parts		$	295,135		$	274,510
	Work-in-progress			133,855			124,765
	Finished Goods			60,556			58,052
	Total			489,546			457,327
	Reserves for excess and obsolete inventory and LIFO			(46,495	)		(43,746	)
	Inventories - net		$	443,051		$	413,581

Intangible_Assets

Intangible Assets	3 Months Ended
	Dec. 28, 2013
Intangible Assets	'
	6	INTANGIBLE ASSETS
	Intangible assets subject to amortization consist of the following (in thousands):
			December 28, 2013						September 30, 2013
			Gross Carrying		Accumulated		Net		Gross Carrying		Accumulated		Net
			Amount		Amortization				Amount		Amortization
	Technology		$	851,399	$	154,162	$	697,237	$	801,010	$	143,196	$	657,814
	Order backlog			25,036		8,782		16,254		19,255		7,936		11,319
	Other			43,280		9,412		33,868		43,427		8,760		34,667
	Total		$	919,715	$	172,356	$	747,359	$	863,692	$	159,892	$	703,800
	Intangible assets acquired during the thirteen week period ended December 28, 2013 were as follows (in thousands):
			Cost		Amortization
					Period
	Intangible assets not subject to amortization:
	Goodwill		$	140,474
	Trademarks and trade names			45,000
				185,474
	Intangible assets subject to amortization:
	Technology			50,000		20 years
	Order backlog			9,000		1 year
				59,000		17.1 years
	Total		$	244,474
	The aggregate amortization expense on identifiable intangible assets for the thirteen week periods ended December 28, 2013 and December 29, 2012 was approximately $16.4 million and $10.6 million, respectively. The estimated amortization expense is $64.1 million for fiscal 2014, $46.4 million for fiscal 2015 and $44.1 million for each of the four succeeding years 2016 through 2019.
	The following is a summary of changes in the carrying value of goodwill by segment from September 30, 2013 through December 28, 2013 (in thousands):
			Power &		Airframe		Non-aviation		Total
			Control
	Balance, September 30, 2013		$	1,566,926	$	1,721,901	$	55,080	$	3,343,907
	Goodwill acquired during the year			—		140,474		—		140,474
	Purchase price allocation adjustments			3,754		82		—		3,836
	Other			—		1,625		—		1,625
	Balance, December 28, 2013		$	1,570,680	$	1,864,082	$	55,080	$	3,489,842

Income_Taxes

Income Taxes	3 Months Ended
	Dec. 28, 2013
Income Taxes	'
	7	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 thirteen week periods ended December 28, 2013 and December 29, 2012, the effective income tax rate was 33.6% and 32.6%, 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 increase in the effective tax rate for the quarter ended December 28, 2013 was primarily due to non-recurring adjustments in estimated deferred state obligations recognized in the quarter ended December 29, 2012.
	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, China, France, 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. AmSafe is subject to U.S. federal examinations for the 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 28, 2013 and September 30, 2013, TD Group had $6.1 million and $6.1 million in unrecognized tax benefits, the recognition of which would have an effect of approximately $5.7 million and $5.7 million on the effective tax rate at December 28, 2013 and September 30, 2013, respectively. 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.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Dec. 28, 2013
Fair Value Measurements	'
	8	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 28, 2013				September 30, 2013
			Level		Carrying		Fair Value		Carrying		Fair Value
					Amount				Amount
	Assets:
	Cash and cash equivalents			1	$	410,924	$	410,924	$	564,740	$	564,740
	Liabilities:
	Interest rate swap agreements (1)			2		7,100		7,100		6,950		6,950
	Interest rate swap agreements (2)			2		2,700		2,700		7,550		7,550
	Long-term debt:
	Term loans			2		3,081,238		3,084,000		3,081,238		3,065,000
	7  3/4% Senior Subordinated Notes due 2018			1		1,600,000		1,720,000		1,600,000		1,708,000
	5  1/2% Senior Subordinated Notes due 2020			1		550,000		536,000		550,000		540,000
	7  1/2% Senior Subordinated Notes due 2021			1		500,000		538,000		500,000		536,000
	-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 2018 Notes, 2020 Notes and 2021 Notes were based upon quoted market prices.

Derivatives_and_Hedging_Activi

Derivatives and Hedging Activities	3 Months Ended
	Dec. 28, 2013
Derivatives and Hedging Activities	'
	9	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.
	Interest rate swap agreements are used to manage interest rate risk associated with floating-rate borrowings under our 2013 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.
	On July 16, 2013, the Company entered into three forward-starting interest rate swap agreements beginning September 30, 2014 to hedge the variable interest rates on the 2013 Credit Facility for a fixed rate based on an aggregate notional amount of $1.0 billion through June 30, 2019. These forward-starting interest rate swap agreements will effectively convert the variable interest rate on the aggregate notional amount of the 2013 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 28, 2013, three forward-starting interest rate swap agreements were in place to swap variable rates on the 2013 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 of the 2013 Credit Facility 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. The net after-tax loss included in accumulated other comprehensive loss to be reclassified into interest expense over the remaining term of the swap agreement was $5.7 million at December 28, 2013.

Segments

Segments	3 Months Ended
	Dec. 28, 2013
Segments	'
	10	SEGMENTS
	The Company’s businesses are organized and managed in three reporting segments: Power & Control, Airframe and Non-aviation.
	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, 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, engineered connectors and elastomers, 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 28,		December 29,
			2013		2012
	Net sales to external customers
	Power & Control		$	251,208	$	193,876
	Airframe			254,666		214,922
	Non-aviation			23,448		21,620
			$	529,322	$	430,418
	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 28,		December 29,
			2013		2012
	EBITDA As Defined
	Power & Control		$	128,984	$	103,119
	Airframe			114,470		98,806
	Non-aviation			5,106		4,435
	Total segment EBITDA As Defined			248,560		206,360
	Unallocated corporate expenses			5,003		5,464
	Total Company EBITDA As Defined			243,557		200,896
	Depreciation and amortization			23,839		17,452
	Interest expense - net			80,853		62,876
	Acquisition-related costs			4,917		3,467
	Stock compensation expense			4,175		7,131
	Income from continuing operations before income taxes		$	129,773	$	109,970
	The following table presents total assets by segment (in thousands):
			December 28,		September 30,
			2013		2013
	Total assets
	Power & Control		$	2,392,889	$	2,398,469
	Airframe			3,246,082		2,958,974
	Non-aviation			130,192		132,672
	Corporate			523,324		658,764
			$	6,292,487	$	6,148,879
	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. 28, 2013
Supplemental Guarantor Information	'
	11	SUPPLEMENTAL GUARANTOR INFORMATION
	TransDigm’s 2018 Notes, 2020 Notes and 2021 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 28, 2013 and September 30, 2013 and its statements of income and comprehensive income and cash flows for the thirteen week periods ended December 28, 2013 and December 29, 2012 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 28, 2013
	(Amounts in thousands)
			TransDigm			TransDigm			Subsidiary			Non-						Total
												Guarantor
			Group			Inc.			Guarantors			Subsidiaries			Eliminations			Consolidated
	ASSETS
	CURRENT ASSETS:
	Cash and cash equivalents		$	1,083		$	379,572		$	7,034		$	23,235		$	—		$	410,924
	Trade accounts receivable - Net			—			14,692			280,421			29,093			(1,767	)		322,439
	Inventories - Net			—			27,430			389,757			26,564			(700	)		443,051
	Deferred income taxes			—			28,431			—			—			—			28,431
	Prepaid expenses and other			—			1,402			12,485			2,361			—			16,248
	Total current assets			1,083			451,527			689,697			81,253			(2,467	)		1,221,093
	INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES			(235,265	)		5,494,861			2,639,587			74,754			(7,973,937	)		—
	PROPERTY, PLANT AND EQUIPMENT - Net			—			15,490			189,292			14,440			—			219,222
	GOODWILL			—			97,507			3,306,565			85,770			—			3,489,842
	TRADEMARKS AND TRADE NAMES			—			19,377			478,417			32,874			—			530,668
	OTHER INTANGIBLE ASSETS - Net			—			21,771			707,670			19,378			(1,460	)		747,359
	DEBT ISSUE COSTS - Net			—			70,551			—			—			—			70,551
	OTHER			—			2,650			10,904			198			—			13,752
	TOTAL ASSETS		$	(234,182	)	$	6,173,734		$	8,022,132		$	308,667		$	(7,977,864	)	$	6,292,487
	LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY
	CURRENT LIABILITIES:
	Current portion of long-term debt		$	—		$	31,045		$	—		$	—		$	—		$	31,045
	Accounts payable			—			10,106			71,853			10,315			(1,769	)		90,505
	Accrued liabilities			—			107,314			92,630			17,155			—			217,099
	Total current liabilities			—			148,465			164,483			27,470			(1,769	)		338,649
	LONG-TERM DEBT			—			5,700,193			—			—			—			5,700,193
	DEFERRED INCOME TAXES			—			417,344			—			—			—			417,344
	OTHER NON-CURRENT LIABILITIES			—			24,994			45,550			(61	)		—			70,483
	Total liabilities			—			6,290,996			210,033			27,409			(1,769	)		6,526,669
	STOCKHOLDERS’ (DEFICIT) EQUITY			(234,182	)		(117,262	)		7,812,099			281,258			(7,976,095	)		(234,182	)
	TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY		$	(234,182	)	$	6,173,734		$	8,022,132		$	308,667		$	(7,977,864	)	$	6,292,487
	TRANSDIGM GROUP INCORPORATED
	CONDENSED CONSOLIDATING BALANCE SHEET
	AS OF SEPTEMBER 30, 2013
	(Amounts in thousands)
			TransDigm			TransDigm			Subsidiary			Non-						Total
												Guarantor
			Group			Inc.			Guarantors			Subsidiaries			Eliminations			Consolidated
	ASSETS
	CURRENT ASSETS:
	Cash and cash equivalents		$	1,313		$	536,863		$	7,900		$	18,664		$	—		$	564,740
	Trade accounts receivable - Net			—			16,332			251,272			24,567			(1,722	)		290,449
	Inventories - Net			—			26,353			359,518			28,633			(923	)		413,581
	Deferred income taxes			—			30,182			—			—			—			30,182
	Prepaid expenses and other			—			7,533			10,693			3,317			—			21,543
	Total current assets			1,313			617,263			629,383			75,181			(2,645	)		1,320,495
	INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES			(337,694	)		5,206,201			2,527,374			77,853			(7,473,734	)		—
	PROPERTY, PLANT AND EQUIPMENT - Net			—			15,471			178,193			15,300			—			208,964
	GOODWILL			—			67,245			3,192,519			84,143			—			3,343,907
	TRADEMARKS AND TRADE NAMES			—			19,377			434,066			32,247			—			485,690
	OTHER INTANGIBLE ASSETS - Net			—			22,130			663,881			19,249			(1,460	)		703,800
	DEBT ISSUE COSTS - Net			—			72,668			—			—			—			72,668
	OTHER			—			2,633			10,520			201			1			13,355
	TOTAL ASSETS		$	(336,381	)	$	6,022,988		$	7,635,936		$	304,174		$	(7,477,838	)	$	6,148,879
	LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY
	CURRENT LIABILITIES:
	Current portion of long-term debt		$	—		$	31,045		$	—		$	—		$	—		$	31,045
Accounts payable			—			14,353			82,661			11,481			(1,727	)		106,768
Accrued liabilities			—			80,313			88,204			16,170			—			184,687
Total current liabilities			—			125,711			170,865			27,651			(1,727	)		322,500
LONG-TERM DEBT			—			5,700,193			—			—			—			5,700,193
DEFERRED INCOME TAXES			—			384,301			—			—			—			384,301
OTHER NON-CURRENT LIABILITIES			—			32,474			45,748			44			—			78,266
Total liabilities			—			6,242,679			216,613			27,695			(1,727	)		6,485,260
STOCKHOLDERS’ (DEFICIT) EQUITY			(336,381	)		(219,691	)		7,419,323			276,479			(7,476,111	)		(336,381	)
TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY		$	(336,381	)	$	6,022,988		$	7,635,936		$	304,174		$	(7,477,838	)	$	6,148,879
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-Guarantor						Total
		Group			Inc.			Guarantors			Subsidiaries			Eliminations			Consolidated
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, 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 INCOME AND COMPREHENSIVE INCOME
FOR THE THIRTEEN WEEK PERIOD ENDED DECEMBER 29, 2012
(Amounts in thousands)
		TransDigm			TransDigm			Subsidiary			Non-Guarantor						Total
		Group			Inc.			Guarantors			Subsidiaries			Eliminations			Consolidated
NET SALES		$	—		$	25,209		$	379,870		$	27,501		$	(2,162	)	$	430,418
COST OF SALES			—			14,242			159,959			19,629			(1,959	)		191,871
GROSS PROFIT			—			10,967			219,911			7,872			(203	)		238,547
SELLING AND ADMINISTRATIVE EXPENSES			—			15,549			35,566			4,046			—			55,161
AMORTIZATION OF INTANGIBLE ASSETS			—			156			9,945			439			—			10,540
INCOME (LOSS) FROM OPERATIONS			—			(4,738	)		174,400			3,387			(203	)		172,846
INTEREST EXPENSE - Net			—			61,956			624			296			—			62,876
EQUITY IN INCOME OF SUBSIDIARIES			(74,170	)		(103,465	)		—			—			177,635			—
INCOME BEFORE INCOME TAXES			74,170			36,771			173,776			3,091			(177,838	)		109,970
INCOME TAX PROVISION (BENEFIT)			—			(37,399	)		71,971			1,228			—			35,800
NET INCOME		$	74,170		$	74,170		$	101,805		$	1,863		$	(177,838	)	$	74,170
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX			1,838			(215	)		261			1,792			(1,838	)		1,838
TOTAL COMPREHENSIVE INCOME		$	76,008		$	73,955		$	102,066		$	3,655		$	(179,676	)	$	76,008
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						Total
		Group			Inc.			Guarantors			Subsidiaries			Eliminations			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
TRANSDIGM GROUP INCORPORATED
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
FOR THE THIRTEEN WEEK PERIOD ENDED DECEMBER 29, 2012
(Amounts in thousands)
		TransDigm			TransDigm			Subsidiary			Non-Guarantor						Total
		Group			Inc.			Guarantors			Subsidiaries			Eliminations			Consolidated
NET CASH PROVIDED BY (USED IN)
OPERATING ACTIVITIES		$	—		$	(30,928	)	$	132,178		$	(1,061	)	$	(2,074	)	$	98,115
INVESTING ACTIVITIES:
Capital expenditures			—			(622	)		(7,566	)		(489	)		—			(8,677	)
Acquisition of businesses, net of cash acquired			—			134			—			—			—			134
Cash proceeds from sale of investment			—			5,000			—			—			—			5,000
Net cash provided by (used in) investing activities			—			4,512			(7,566	)		(489	)		—			(3,543	)
FINANCING ACTIVITIES:
Intercompany activities			660,335			(540,502	)		(121,689	)		(218	)		2,074			—
Excess tax benefits related to share-based payment arrangements			26,688			—			—			—			—			26,688
Proceeds from exercise of stock options			5,541			—			—			—			—			5,541
Dividends paid			(702,406	)		—			—			—			—			(702,406	)
Proceeds from 2011 credit facility-net			—			147,373			—			—			—			147,373
Proceeds from senior subordinated notes due 2020-net			—			542,000			—			—			—			542,000
Net cash provided by (used in) financing activities			(9,842	)		148,871			(121,689	)		(218	)		2,074			19,196
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS			—			—			—			139			—			139
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS			(9,842	)		122,455			2,923			(1,629	)		—			113,907
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD			20,100			406,891			4,494			9,039			—			440,524
CASH AND CASH EQUIVALENTS, END OF PERIOD		$	10,258		$	529,346		$	7,417		$	7,410		$	—		$	554,431

Earnings_Per_Share_TwoClass_Me1

Earnings Per Share (Two-Class Method) (Tables)	3 Months Ended
	Dec. 28, 2013
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 28,			December 29,
		2013			2012
	Numerator for earnings per share:
	Net income	$	86,123		$	74,170
	Less dividends on participating securities		(4,139	)		(38,130	)
	Net income applicable to common stock - basic and diluted	$	81,984		$	36,040
	Denominator for basic and diluted earnings per share under the two-class method:
	Weighted average common shares outstanding		52,687			51,796
	Vested options deemed participating securities		4,304			2,657
	Total shares for basic and diluted earnings per share		56,991			54,453
	Basic and diluted earnings per share	$	1.44		$	0.66

Inventories_Tables

Inventories (Tables)	3 Months Ended
	Dec. 28, 2013
Inventories	'
	Inventories consist of the following (in thousands):
		December 28,			September 30,
		2013			2013
	Raw materials and purchased component parts	$	295,135		$	274,510
	Work-in-progress		133,855			124,765
	Finished Goods		60,556			58,052
	Total		489,546			457,327
	Reserves for excess and obsolete inventory and LIFO		(46,495	)		(43,746	)
	Inventories - net	$	443,051		$	413,581

Intangible_Assets_Tables

Intangible Assets (Tables)	3 Months Ended
	Dec. 28, 2013
Intangible Assets Subject to Amortization	'
	Intangible assets subject to amortization consist of the following (in thousands):
		December 28, 2013						September 30, 2013
		Gross Carrying		Accumulated		Net		Gross Carrying		Accumulated		Net
		Amount		Amortization				Amount		Amortization
	Technology	$	851,399	$	154,162	$	697,237	$	801,010	$	143,196	$	657,814
	Order backlog		25,036		8,782		16,254		19,255		7,936		11,319
	Other		43,280		9,412		33,868		43,427		8,760		34,667
	Total	$	919,715	$	172,356	$	747,359	$	863,692	$	159,892	$	703,800
Intangible Assets Acquired	'
	Intangible assets acquired during the thirteen week period ended December 28, 2013 were as follows (in thousands):
		Cost		Amortization
				Period
	Intangible assets not subject to amortization:
	Goodwill	$	140,474
	Trademarks and trade names		45,000
			185,474
	Intangible assets subject to amortization:
	Technology		50,000		20 years
	Order backlog		9,000		1 year
			59,000		17.1 years
	Total	$	244,474
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, 2013 through December 28, 2013 (in thousands):
		Power &		Airframe		Non-aviation		Total
		Control
	Balance, September 30, 2013	$	1,566,926	$	1,721,901	$	55,080	$	3,343,907
	Goodwill acquired during the year		—		140,474		—		140,474
	Purchase price allocation adjustments		3,754		82		—		3,836
	Other		—		1,625		—		1,625
	Balance, December 28, 2013	$	1,570,680	$	1,864,082	$	55,080	$	3,489,842

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Dec. 28, 2013
Carrying Amounts and Fair Values of Financial Instruments	'
	The following summarizes the carrying amounts and fair values of financial instruments (in thousands):
					December 28, 2013				September 30, 2013
			Level		Carrying		Fair Value		Carrying		Fair Value
					Amount				Amount
	Assets:
	Cash and cash equivalents			1	$	410,924	$	410,924	$	564,740	$	564,740
	Liabilities:
	Interest rate swap agreements (1)			2		7,100		7,100		6,950		6,950
	Interest rate swap agreements (2)			2		2,700		2,700		7,550		7,550
	Long-term debt:
	Term loans			2		3,081,238		3,084,000		3,081,238		3,065,000
	7  3/4% Senior Subordinated Notes due 2018			1		1,600,000		1,720,000		1,600,000		1,708,000
	5  1/2% Senior Subordinated Notes due 2020			1		550,000		536,000		550,000		540,000
	7  1/2% Senior Subordinated Notes due 2021			1		500,000		538,000		500,000		536,000
	-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. 28, 2013
Segment Reporting Information	'
	The following table presents net sales by reportable segment (in thousands):
		Thirteen Week Periods Ended
		December 28,		December 29,
		2013		2012
	Net sales to external customers
	Power & Control	$	251,208	$	193,876
	Airframe		254,666		214,922
	Non-aviation		23,448		21,620
		$	529,322	$	430,418
	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 28,		December 29,
		2013		2012
	EBITDA As Defined
	Power & Control	$	128,984	$	103,119
	Airframe		114,470		98,806
	Non-aviation		5,106		4,435
	Total segment EBITDA As Defined		248,560		206,360
	Unallocated corporate expenses		5,003		5,464
	Total Company EBITDA As Defined		243,557		200,896
	Depreciation and amortization		23,839		17,452
	Interest expense - net		80,853		62,876
	Acquisition-related costs		4,917		3,467
	Stock compensation expense		4,175		7,131
	Income from continuing operations before income taxes	$	129,773	$	109,970
	The following table presents total assets by segment (in thousands):
		December 28,		September 30,
		2013		2013
	Total assets
	Power & Control	$	2,392,889	$	2,398,469
	Airframe		3,246,082		2,958,974
	Non-aviation		130,192		132,672
	Corporate		523,324		658,764
		$	6,292,487	$	6,148,879

Supplemental_Guarantor_Informa1

Supplemental Guarantor Information (Tables)	3 Months Ended
	Dec. 28, 2013
Supplemental Condensed Consolidating Balance Sheet	'
	TRANSDIGM GROUP INCORPORATED
	CONDENSED CONSOLIDATING BALANCE SHEET
	AS OF DECEMBER 28, 2013
	(Amounts in thousands)
		TransDigm			TransDigm			Subsidiary			Non-						Total
											Guarantor
		Group			Inc.			Guarantors			Subsidiaries			Eliminations			Consolidated
	ASSETS
	CURRENT ASSETS:
	Cash and cash equivalents	$	1,083		$	379,572		$	7,034		$	23,235		$	—		$	410,924
	Trade accounts receivable - Net		—			14,692			280,421			29,093			(1,767	)		322,439
	Inventories - Net		—			27,430			389,757			26,564			(700	)		443,051
	Deferred income taxes		—			28,431			—			—			—			28,431
	Prepaid expenses and other		—			1,402			12,485			2,361			—			16,248
	Total current assets		1,083			451,527			689,697			81,253			(2,467	)		1,221,093
	INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES		(235,265	)		5,494,861			2,639,587			74,754			(7,973,937	)		—
	PROPERTY, PLANT AND EQUIPMENT - Net		—			15,490			189,292			14,440			—			219,222
	GOODWILL		—			97,507			3,306,565			85,770			—			3,489,842
	TRADEMARKS AND TRADE NAMES		—			19,377			478,417			32,874			—			530,668
	OTHER INTANGIBLE ASSETS - Net		—			21,771			707,670			19,378			(1,460	)		747,359
	DEBT ISSUE COSTS - Net		—			70,551			—			—			—			70,551
	OTHER		—			2,650			10,904			198			—			13,752
	TOTAL ASSETS	$	(234,182	)	$	6,173,734		$	8,022,132		$	308,667		$	(7,977,864	)	$	6,292,487
	LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY
	CURRENT LIABILITIES:
	Current portion of long-term debt	$	—		$	31,045		$	—		$	—		$	—		$	31,045
	Accounts payable		—			10,106			71,853			10,315			(1,769	)		90,505
	Accrued liabilities		—			107,314			92,630			17,155			—			217,099
	Total current liabilities		—			148,465			164,483			27,470			(1,769	)		338,649
	LONG-TERM DEBT		—			5,700,193			—			—			—			5,700,193
	DEFERRED INCOME TAXES		—			417,344			—			—			—			417,344
	OTHER NON-CURRENT LIABILITIES		—			24,994			45,550			(61	)		—			70,483
	Total liabilities		—			6,290,996			210,033			27,409			(1,769	)		6,526,669
	STOCKHOLDERS’ (DEFICIT) EQUITY		(234,182	)		(117,262	)		7,812,099			281,258			(7,976,095	)		(234,182	)
	TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY	$	(234,182	)	$	6,173,734		$	8,022,132		$	308,667		$	(7,977,864	)	$	6,292,487
	TRANSDIGM GROUP INCORPORATED
	CONDENSED CONSOLIDATING BALANCE SHEET
	AS OF SEPTEMBER 30, 2013
	(Amounts in thousands)
		TransDigm			TransDigm			Subsidiary			Non-						Total
											Guarantor
		Group			Inc.			Guarantors			Subsidiaries			Eliminations			Consolidated
	ASSETS
	CURRENT ASSETS:
	Cash and cash equivalents	$	1,313		$	536,863		$	7,900		$	18,664		$	—		$	564,740
	Trade accounts receivable - Net		—			16,332			251,272			24,567			(1,722	)		290,449
	Inventories - Net		—			26,353			359,518			28,633			(923	)		413,581
	Deferred income taxes		—			30,182			—			—			—			30,182
	Prepaid expenses and other		—			7,533			10,693			3,317			—			21,543
	Total current assets		1,313			617,263			629,383			75,181			(2,645	)		1,320,495
	INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES		(337,694	)		5,206,201			2,527,374			77,853			(7,473,734	)		—
	PROPERTY, PLANT AND EQUIPMENT - Net		—			15,471			178,193			15,300			—			208,964
	GOODWILL		—			67,245			3,192,519			84,143			—			3,343,907
	TRADEMARKS AND TRADE NAMES		—			19,377			434,066			32,247			—			485,690
	OTHER INTANGIBLE ASSETS - Net		—			22,130			663,881			19,249			(1,460	)		703,800
	DEBT ISSUE COSTS - Net		—			72,668			—			—			—			72,668
	OTHER		—			2,633			10,520			201			1			13,355
	TOTAL ASSETS	$	(336,381	)	$	6,022,988		$	7,635,936		$	304,174		$	(7,477,838	)	$	6,148,879
	LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY
	CURRENT LIABILITIES:
	Current portion of long-term debt	$	—		$	31,045		$	—		$	—		$	—		$	31,045
	Accounts payable		—			14,353			82,661			11,481			(1,727	)		106,768
	Accrued liabilities		—			80,313			88,204			16,170			—			184,687
Total current liabilities		—			125,711			170,865			27,651			(1,727	)		322,500
LONG-TERM DEBT		—			5,700,193			—			—			—			5,700,193
DEFERRED INCOME TAXES		—			384,301			—			—			—			384,301
OTHER NON-CURRENT LIABILITIES		—			32,474			45,748			44			—			78,266
Total liabilities		—			6,242,679			216,613			27,695			(1,727	)		6,485,260
STOCKHOLDERS’ (DEFICIT) EQUITY		(336,381	)		(219,691	)		7,419,323			276,479			(7,476,111	)		(336,381	)
TOTAL LIABILITIES AND STOCKHOLDERS’ (DEFICIT) EQUITY	$	(336,381	)	$	6,022,988		$	7,635,936		$	304,174		$	(7,477,838	)	$	6,148,879
Supplemental Condensed Consolidating Statement of Income	'
	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-Guarantor						Total
		Group			Inc.			Guarantors			Subsidiaries			Eliminations			Consolidated
	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, 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 INCOME AND COMPREHENSIVE INCOME
	FOR THE THIRTEEN WEEK PERIOD ENDED DECEMBER 29, 2012
	(Amounts in thousands)
		TransDigm			TransDigm			Subsidiary			Non-Guarantor						Total
		Group			Inc.			Guarantors			Subsidiaries			Eliminations			Consolidated
	NET SALES	$	—		$	25,209		$	379,870		$	27,501		$	(2,162	)	$	430,418
	COST OF SALES		—			14,242			159,959			19,629			(1,959	)		191,871
	GROSS PROFIT		—			10,967			219,911			7,872			(203	)		238,547
	SELLING AND ADMINISTRATIVE EXPENSES		—			15,549			35,566			4,046			—			55,161
	AMORTIZATION OF INTANGIBLE ASSETS		—			156			9,945			439			—			10,540
	INCOME (LOSS) FROM OPERATIONS		—			(4,738	)		174,400			3,387			(203	)		172,846
	INTEREST EXPENSE - Net		—			61,956			624			296			—			62,876
	EQUITY IN INCOME OF SUBSIDIARIES		(74,170	)		(103,465	)		—			—			177,635			—
	INCOME BEFORE INCOME TAXES		74,170			36,771			173,776			3,091			(177,838	)		109,970
	INCOME TAX PROVISION (BENEFIT)		—			(37,399	)		71,971			1,228			—			35,800
	NET INCOME	$	74,170		$	74,170		$	101,805		$	1,863		$	(177,838	)	$	74,170
	OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX		1,838			(215	)		261			1,792			(1,838	)		1,838
	TOTAL COMPREHENSIVE INCOME	$	76,008		$	73,955		$	102,066		$	3,655		$	(179,676	)	$	76,008
Supplemental Condensed Consolidating Statement of Cash Flows	'
	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						Total
		Group			Inc.			Guarantors			Subsidiaries			Eliminations			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
	TRANSDIGM GROUP INCORPORATED
	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
	FOR THE THIRTEEN WEEK PERIOD ENDED DECEMBER 29, 2012
	(Amounts in thousands)
		TransDigm			TransDigm			Subsidiary			Non-Guarantor						Total
		Group			Inc.			Guarantors			Subsidiaries			Eliminations			Consolidated
	NET CASH PROVIDED BY (USED IN)
	OPERATING ACTIVITIES	$	—		$	(30,928	)	$	132,178		$	(1,061	)	$	(2,074	)	$	98,115
	INVESTING ACTIVITIES:
	Capital expenditures		—			(622	)		(7,566	)		(489	)		—			(8,677	)
	Acquisition of businesses, net of cash acquired		—			134			—			—			—			134
	Cash proceeds from sale of investment		—			5,000			—			—			—			5,000
	Net cash provided by (used in) investing activities		—			4,512			(7,566	)		(489	)		—			(3,543	)
	FINANCING ACTIVITIES:
	Intercompany activities		660,335			(540,502	)		(121,689	)		(218	)		2,074			—
	Excess tax benefits related to share-based payment arrangements		26,688			—			—			—			—			26,688
	Proceeds from exercise of stock options		5,541			—			—			—			—			5,541
	Dividends paid		(702,406	)		—			—			—			—			(702,406	)
	Proceeds from 2011 credit facility-net		—			147,373			—			—			—			147,373
	Proceeds from senior subordinated notes due 2020-net		—			542,000			—			—			—			542,000
	Net cash provided by (used in) financing activities		(9,842	)		148,871			(121,689	)		(218	)		2,074			19,196
	EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS		—			—			—			139			—			139
	INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		(9,842	)		122,455			2,923			(1,629	)		—			113,907
	CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD		20,100			406,891			4,494			9,039			—			440,524
	CASH AND CASH EQUIVALENTS, END OF PERIOD	$	10,258		$	529,346		$	7,417		$	7,410		$	—		$	554,431

Description_of_The_Business_Ad

Description of The Business - Additional Information (Detail)	3 Months Ended
	Dec. 28, 2013
Nature Of Business [Line Items]	'
Percentage of ownership in subsidiary	100.00%
7 3/4% Senior Subordinated Notes, Due 2018	'
Nature Of Business [Line Items]	'
Interest rate of senior subordinated debt	7.75%
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%

Acquisitions_Additional_Inform

Acquisitions - Additional Information (Detail) (USD $)	3 Months Ended		1 Months Ended	3 Months Ended	1 Months Ended		1 Months Ended
	Dec. 28, 2013	Sep. 30, 2013	Jun. 28, 2013	Dec. 28, 2013	Jun. 05, 2013	Sep. 30, 2013	Jun. 05, 2013	Dec. 19, 2013
			Whippany Actuation Systems LLC	Whippany Actuation Systems LLC	Arkwin Industries, Inc	Arkwin Industries, Inc	Aerosonic Corporation	Airborne Systems Inc
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'
Cash consideration paid to acquire business	'	'	$151,500,000	$2,700,000	$285,700,000	'	$39,800,000	$263,800,000
Business acquisition contract price	'	'	'	'	'	'	'	250,000,000
Amount of goodwill expected to be non deductible for tax	3,489,842,000	3,343,907,000	'	'	185,000,000	'	14,000,000	140,000,000
Amount of goodwill expected to be tax deductible	'	'	103,000,000	'	'	'	'	'
Business acquisition, purchase price adjustment received	'	'	'	'	'	$200,000	'	'
Estimated useful life of aircraft (in years)	'30 years	'	'	'	'	'	'	'

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. 28, 2013	Dec. 29, 2012
Numerator for earnings per share:	'	'
Net income	$86,123	$74,170
Less dividends on participating securities	-1,339	'
Net income applicable to common stock - basic and diluted	81,984	36,040
Denominator for basic and diluted earnings per share under the two-class method:	'	'
Weighted average common shares outstanding	52,687	51,796
Vested options deemed participating securities	4,304	2,657
Total shares for basic and diluted earnings per share	56,991	54,453
Basic and diluted earnings per share	$1.44	$0.66
Participating Securities	'	'
Numerator for earnings per share:	'	'
Less dividends on participating securities	($4,139)	($38,130)

Inventories_Additional_Informa

Inventories - Additional Information (Detail) (Maximum)	Dec. 28, 2013
Maximum	'
Inventory [Line Items]	'
Percentage of inventory	5.00%

Inventories_Detail

Inventories (Detail) (USD $)	Dec. 28, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
Inventory [Line Items]	'	'
Raw materials and purchased component parts	$295,135	$274,510
Work-in-progress	133,855	124,765
Finished Goods	60,556	58,052
Total	489,546	457,327
Reserves for excess and obsolete inventory and LIFO	-46,495	-43,746
Inventories - net	$443,051	$413,581

Intangible_Assets_Subjects_to_

Intangible Assets Subjects to Amortization (Detail) (USD $)	Dec. 28, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$919,715	$863,692
Accumulated Amortization	172,356	159,892
Net	747,359	703,800
Technology	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	851,399	801,010
Accumulated Amortization	154,162	143,196
Net	697,237	657,814
Order backlog	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	25,036	19,255
Accumulated Amortization	8,782	7,936
Net	16,254	11,319
Other intangible assets	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	43,280	43,427
Accumulated Amortization	9,412	8,760
Net	$33,868	$34,667

Intangible_Assets_Acquired_Det

Intangible Assets Acquired (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013
Acquired Finite-Lived Intangible Assets [Line Items]	'
Intangible assets not subject to amortization	$185,474
Intangible assets subject to amortization	59,000
Total - Intangible assets both subject to and not subject to amortization	244,474
Amortization Period (in years)	'17 years 1 month 6 days
Goodwill	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Intangible assets not subject to amortization	140,474
Trademarks and trade names	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Intangible assets not subject to amortization	45,000
Technology	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Intangible assets subject to amortization	50,000
Amortization Period (in years)	'20 years
Order backlog	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Intangible assets subject to amortization	$9,000
Amortization Period (in years)	'1 year

Intangible_Assets_Additional_I

Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended
	Dec. 28, 2013	Dec. 29, 2012
Schedule of Intangible Assets Disclosure [Line Items]	'	'
Aggregate amortization expense	$16,435,000	$10,584,000
Estimated Amortization Expense, 2014	64,100,000	'
Estimated Amortization Expense, 2015	46,400,000	'
Estimated Amortization Expense, 2016	44,100,000	'
Estimated Amortization Expense, 2017	44,100,000	'
Estimated Amortization Expense, 2018	44,100,000	'
Estimated Amortization Expense, 2019	$44,100,000	'

Summary_of_Changes_in_Carrying

Summary of Changes in Carrying Value of Goodwill (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013
Goodwill [Line Items]	'
Goodwill, Beginning Balance	$3,343,907
Goodwill acquired during the year	140,474
Purchase price allocation adjustments	3,836
Other	1,625
Goodwill, Ending Balance	3,489,842
Power & Control	'
Goodwill [Line Items]	'
Goodwill, Beginning Balance	1,566,926
Purchase price allocation adjustments	3,754
Goodwill, Ending Balance	1,570,680
Airframe	'
Goodwill [Line Items]	'
Goodwill, Beginning Balance	1,721,901
Goodwill acquired during the year	140,474
Purchase price allocation adjustments	82
Other	1,625
Goodwill, Ending Balance	1,864,082
Non-aviation	'
Goodwill [Line Items]	'
Goodwill, Beginning Balance	55,080
Goodwill acquired during the year	'
Goodwill, Ending Balance	$55,080

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012	Sep. 30, 2013
Income Tax Contingency [Line Items]	'	'	'
Effective income tax rate	33.60%	32.60%	'
Unrecognized tax benefit	$6.10	'	$6.10
Effect of unrecognized tax benefits on effective tax rate	$5.70	'	$5.70

Carrying_Amounts_and_Fair_Valu

Carrying Amounts and Fair Values of Financial Instruments (Detail) (USD $)	Dec. 28, 2013		Sep. 30, 2013		Dec. 29, 2012	Sep. 30, 2012
In Thousands, unless otherwise specified
Carrying Amounts and Fair Values of Financial Instruments [Line Items]	'		'		'	'
Cash and cash equivalents, Assets, Carrying Amount	$410,924		$564,740		$554,431	$440,524
Level 1	'		'		'	'
Carrying Amounts and Fair Values of Financial Instruments [Line Items]	'		'		'	'
Cash and cash equivalents, Assets, Carrying Amount	410,924		564,740		'	'
Cash and cash equivalents, Assets, Fair Value	410,924		564,740		'	'
Level 1 | 7 3/4% Senior Subordinated Notes due 2018	'		'		'	'
Carrying Amounts and Fair Values of Financial Instruments [Line Items]	'		'		'	'
Senior Subordinated Notes, Liabilities, Carrying Amount	1,600,000		1,600,000		'	'
Senior Subordinated Notes, Liabilities, Fair Value	1,720,000		1,708,000		'	'
Level 1 | 5 1/2% Senior Subordinated Notes, Due 2020	'		'		'	'
Carrying Amounts and Fair Values of Financial Instruments [Line Items]	'		'		'	'
Senior Subordinated Notes, Liabilities, Carrying Amount	550,000		550,000		'	'
Senior Subordinated Notes, Liabilities, Fair Value	536,000		540,000		'	'
Level 1 | 7 1/2% Senior Subordinated Notes, Due 2021	'		'		'	'
Carrying Amounts and Fair Values of Financial Instruments [Line Items]	'		'		'	'
Senior Subordinated Notes, Liabilities, Carrying Amount	500,000		500,000		'	'
Senior Subordinated Notes, Liabilities, Fair Value	538,000		536,000		'	'
Level 2 | Accrued Liabilities	'		'		'	'
Carrying Amounts and Fair Values of Financial Instruments [Line Items]	'		'		'	'
Interest rate swap agreements, Liabilities, Carrying Amount	7,100	[1]	6,950	[1]	'	'
Interest rate swap agreements, Liabilities, Fair Value	7,100	[1]	6,950	[1]	'	'
Level 2 | Other Non-Current Liabilities	'		'		'	'
Carrying Amounts and Fair Values of Financial Instruments [Line Items]	'		'		'	'
Interest rate swap agreements, Liabilities, Carrying Amount	2,700	[2]	7,550	[2]	'	'
Interest rate swap agreements, Liabilities, Fair Value	2,700	[2]	7,550	[2]	'	'
Level 2 | Term Loans	'		'		'	'
Carrying Amounts and Fair Values of Financial Instruments [Line Items]	'		'		'	'
Term loans, Liabilities, Carrying Amount	3,081,238		3,081,238		'	'
Term loans, Liabilities, Fair Value	$3,084,000		$3,065,000		'	'
[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)	Dec. 28, 2013
7 3/4% Senior Subordinated Notes due 2018	'
Carrying Amounts and Fair Values of Financial Instruments [Line Items]	'
Senior subordinate note, due date	'2018
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

Derivatives_and_Hedging_Activi1

Derivatives and Hedging Activities - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 28, 2013
Derivative [Line Items]	'
Derivative loss to be recognized	$5.70
2013 Credit Facility	'
Derivative [Line Items]	'
Interest rate swap, notional amount	353
Fixed rate of interest under interest rate swap	5.17%
Interest rate swap agreements description	'2.17% plus the 3% margin percentage
New Senior Secured Credit Facility	'
Derivative [Line Items]	'
Interest rate swap, notional amount	$1,000
Fixed rate of interest under interest rate swap	5.40%
Interest rate swap agreements description	'2.4% plus the 3% margin percentage

Segment_Information_Additional

Segment Information - Additional Information (Detail)	3 Months Ended
	Dec. 28, 2013
	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. 28, 2013	Dec. 29, 2012
Segment Reporting Information [Line Items]	'	'
NET SALES	$529,322	$430,418
Operating Segments | Power & Control	'	'
Segment Reporting Information [Line Items]	'	'
NET SALES	251,208	193,876
Operating Segments | Airframe	'	'
Segment Reporting Information [Line Items]	'	'
NET SALES	254,666	214,922
Operating Segments | Non-aviation	'	'
Segment Reporting Information [Line Items]	'	'
NET SALES	$23,448	$21,620

EBITDA_Defined_by_Segment_to_C

EBITDA Defined by Segment to Consolidated Income from Continuing Operations (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Segment Reporting, Reconciliation of Operating Income Segment to Consolidated [Line Items]	'	'
Earnings before interest taxes depreciation and amortization	$243,557	$200,896
Depreciation and amortization	23,839	17,452
Interest expense - net	80,853	62,876
Acquisition-related costs	4,917	3,467
Stock compensation expense	4,175	7,131
INCOME BEFORE INCOME TAXES	129,773	109,970
Operating Segments	'	'
Segment Reporting, Reconciliation of Operating Income Segment to Consolidated [Line Items]	'	'
Earnings before interest taxes depreciation and amortization	248,560	206,360
Operating Segments | Power & Control	'	'
Segment Reporting, Reconciliation of Operating Income Segment to Consolidated [Line Items]	'	'
Earnings before interest taxes depreciation and amortization	128,984	103,119
Operating Segments | Airframe	'	'
Segment Reporting, Reconciliation of Operating Income Segment to Consolidated [Line Items]	'	'
Earnings before interest taxes depreciation and amortization	114,470	98,806
Operating Segments | Non-aviation	'	'
Segment Reporting, Reconciliation of Operating Income Segment to Consolidated [Line Items]	'	'
Earnings before interest taxes depreciation and amortization	5,106	4,435
Corporate, Non-Segment	'	'
Segment Reporting, Reconciliation of Operating Income Segment to Consolidated [Line Items]	'	'
Unallocated corporate expenses	$5,003	$5,464

Total_Assets_by_Segment_Detail

Total Assets by Segment (Detail) (USD $)	Dec. 28, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
Total Assets By Segment [Line Items]	'	'
Total assets	$6,292,487	$6,148,879
Corporate	'	'
Total Assets By Segment [Line Items]	'	'
Total assets	523,324	658,764
Operating Segments | Power & Control	'	'
Total Assets By Segment [Line Items]	'	'
Total assets	2,392,889	2,398,469
Operating Segments | Airframe	'	'
Total Assets By Segment [Line Items]	'	'
Total assets	3,246,082	2,958,974
Operating Segments | Non-aviation	'	'
Total Assets By Segment [Line Items]	'	'
Total assets	$130,192	$132,672

Supplemental_Condensed_Consoli

Supplemental Condensed Consolidating Balance Sheet (Detail) (USD $)	Dec. 28, 2013	Sep. 30, 2013	Dec. 29, 2012	Sep. 30, 2012
In Thousands, unless otherwise specified
Supplemental Guarantor Information [Line Items]	'	'	'	'
Cash and cash equivalents	$410,924	$564,740	$554,431	$440,524
Trade accounts receivable - Net	322,439	290,449	'	'
Inventories - Net	443,051	413,581	'	'
Deferred income taxes	28,431	30,182	'	'
Prepaid expenses and other	16,248	21,543	'	'
Total current assets	1,221,093	1,320,495	'	'
PROPERTY, PLANT AND EQUIPMENT - Net	219,222	208,964	'	'
GOODWILL	3,489,842	3,343,907	'	'
TRADEMARKS AND TRADE NAMES	530,668	485,690	'	'
OTHER INTANGIBLE ASSETS - Net	747,359	703,800	'	'
DEBT ISSUE COSTS - Net	70,551	72,668	'	'
OTHER	13,752	13,355	'	'
TOTAL ASSETS	6,292,487	6,148,879	'	'
Current portion of long-term debt	31,045	31,045	'	'
Accounts payable	90,505	106,768	'	'
Accrued liabilities	217,099	184,687	'	'
Total current liabilities	338,649	322,500	'	'
LONG-TERM DEBT	5,700,193	5,700,193	'	'
DEFERRED INCOME TAXES	417,344	384,301	'	'
OTHER NON-CURRENT LIABILITIES	70,483	78,266	'	'
Total liabilities	6,526,669	6,485,260	'	'
STOCKHOLDERS' (DEFICIT) EQUITY	-234,182	-336,381	'	'
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY	6,292,487	6,148,879	'	'
TransDigm Group	'	'	'	'
Supplemental Guarantor Information [Line Items]	'	'	'	'
Cash and cash equivalents	1,083	1,313	10,258	20,100
Total current assets	1,083	1,313	'	'
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	-235,265	-337,694	'	'
TOTAL ASSETS	-234,182	-336,381	'	'
STOCKHOLDERS' (DEFICIT) EQUITY	-234,182	-336,381	'	'
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY	-234,182	-336,381	'	'
TransDigm Inc.	'	'	'	'
Supplemental Guarantor Information [Line Items]	'	'	'	'
Cash and cash equivalents	379,572	536,863	529,346	406,891
Trade accounts receivable - Net	14,692	16,332	'	'
Inventories - Net	27,430	26,353	'	'
Deferred income taxes	28,431	30,182	'	'
Prepaid expenses and other	1,402	7,533	'	'
Total current assets	451,527	617,263	'	'
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	5,494,861	5,206,201	'	'
PROPERTY, PLANT AND EQUIPMENT - Net	15,490	15,471	'	'
GOODWILL	97,507	67,245	'	'
TRADEMARKS AND TRADE NAMES	19,377	19,377	'	'
OTHER INTANGIBLE ASSETS - Net	21,771	22,130	'	'
DEBT ISSUE COSTS - Net	70,551	72,668	'	'
OTHER	2,650	2,633	'	'
TOTAL ASSETS	6,173,734	6,022,988	'	'
Current portion of long-term debt	31,045	31,045	'	'
Accounts payable	10,106	14,353	'	'
Accrued liabilities	107,314	80,313	'	'
Total current liabilities	148,465	125,711	'	'
LONG-TERM DEBT	5,700,193	5,700,193	'	'
DEFERRED INCOME TAXES	417,344	384,301	'	'
OTHER NON-CURRENT LIABILITIES	24,994	32,474	'	'
Total liabilities	6,290,996	6,242,679	'	'
STOCKHOLDERS' (DEFICIT) EQUITY	-117,262	-219,691	'	'
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY	6,173,734	6,022,988	'	'
Subsidiary Guarantors	'	'	'	'
Supplemental Guarantor Information [Line Items]	'	'	'	'
Cash and cash equivalents	7,034	7,900	7,417	4,494
Trade accounts receivable - Net	280,421	251,272	'	'
Inventories - Net	389,757	359,518	'	'
Prepaid expenses and other	12,485	10,693	'	'
Total current assets	689,697	629,383	'	'
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	2,639,587	2,527,374	'	'
PROPERTY, PLANT AND EQUIPMENT - Net	189,292	178,193	'	'
GOODWILL	3,306,565	3,192,519	'	'
TRADEMARKS AND TRADE NAMES	478,417	434,066	'	'
OTHER INTANGIBLE ASSETS - Net	707,670	663,881	'	'
OTHER	10,904	10,520	'	'
TOTAL ASSETS	8,022,132	7,635,936	'	'
Accounts payable	71,853	82,661	'	'
Accrued liabilities	92,630	88,204	'	'
Total current liabilities	164,483	170,865	'	'
OTHER NON-CURRENT LIABILITIES	45,550	45,748	'	'
Total liabilities	210,033	216,613	'	'
STOCKHOLDERS' (DEFICIT) EQUITY	7,812,099	7,419,323	'	'
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY	8,022,132	7,635,936	'	'
Non-Guarantor Subsidiaries	'	'	'	'
Supplemental Guarantor Information [Line Items]	'	'	'	'
Cash and cash equivalents	23,235	18,664	7,410	9,039
Trade accounts receivable - Net	29,093	24,567	'	'
Inventories - Net	26,564	28,633	'	'
Prepaid expenses and other	2,361	3,317	'	'
Total current assets	81,253	75,181	'	'
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	74,754	77,853	'	'
PROPERTY, PLANT AND EQUIPMENT - Net	14,440	15,300	'	'
GOODWILL	85,770	84,143	'	'
TRADEMARKS AND TRADE NAMES	32,874	32,247	'	'
OTHER INTANGIBLE ASSETS - Net	19,378	19,249	'	'
OTHER	198	201	'	'
TOTAL ASSETS	308,667	304,174	'	'
Accounts payable	10,315	11,481	'	'
Accrued liabilities	17,155	16,170	'	'
Total current liabilities	27,470	27,651	'	'
OTHER NON-CURRENT LIABILITIES	-61	44	'	'
Total liabilities	27,409	27,695	'	'
STOCKHOLDERS' (DEFICIT) EQUITY	281,258	276,479	'	'
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY	308,667	304,174	'	'
Eliminations	'	'	'	'
Supplemental Guarantor Information [Line Items]	'	'	'	'
Trade accounts receivable - Net	-1,767	-1,722	'	'
Inventories - Net	-700	-923	'	'
Total current assets	-2,467	-2,645	'	'
INVESTMENT IN SUBSIDIARIES AND INTERCOMPANY BALANCES	-7,973,937	-7,473,734	'	'
OTHER INTANGIBLE ASSETS - Net	-1,460	-1,460	'	'
OTHER	'	1	'	'
TOTAL ASSETS	-7,977,864	-7,477,838	'	'
Accounts payable	-1,769	-1,727	'	'
Total current liabilities	-1,769	-1,727	'	'
Total liabilities	-1,769	-1,727	'	'
STOCKHOLDERS' (DEFICIT) EQUITY	-7,976,095	-7,476,111	'	'
TOTAL LIABILITIES AND STOCKHOLDERS' (DEFICIT) EQUITY	($7,977,864)	($7,477,838)	'	'

Supplemental_Condensed_Consoli1

Supplemental Condensed Consolidating Statement of Income and Comprehensive Income (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Supplemental Guarantor Information [Line Items]	'	'
NET SALES	$529,322	$430,418
COST OF SALES	245,186	191,871
GROSS PROFIT	284,136	238,547
SELLING AND ADMINISTRATIVE EXPENSES	57,127	55,161
AMORTIZATION OF INTANGIBLE ASSETS	16,383	10,540
INCOME (LOSS) FROM OPERATIONS	210,626	172,846
INTEREST EXPENSE - Net	80,853	62,876
INCOME BEFORE INCOME TAXES	129,773	109,970
INCOME TAX PROVISION (BENEFIT)	43,650	35,800
Net income	86,123	74,170
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	6,711	1,838
TOTAL COMPREHENSIVE INCOME	92,834	76,008
TransDigm Group	'	'
Supplemental Guarantor Information [Line Items]	'	'
EQUITY IN INCOME OF SUBSIDIARIES	-86,123	-74,170
INCOME BEFORE INCOME TAXES	86,123	74,170
Net income	86,123	74,170
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	6,711	1,838
TOTAL COMPREHENSIVE INCOME	92,834	76,008
TransDigm Inc.	'	'
Supplemental Guarantor Information [Line Items]	'	'
NET SALES	26,741	25,209
COST OF SALES	15,594	14,242
GROSS PROFIT	11,147	10,967
SELLING AND ADMINISTRATIVE EXPENSES	12,166	15,549
AMORTIZATION OF INTANGIBLE ASSETS	347	156
INCOME (LOSS) FROM OPERATIONS	-1,366	-4,738
INTEREST EXPENSE - Net	80,646	61,956
EQUITY IN INCOME OF SUBSIDIARIES	-129,017	-103,465
INCOME BEFORE INCOME TAXES	47,005	36,771
INCOME TAX PROVISION (BENEFIT)	-39,118	-37,399
Net income	86,123	74,170
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	3,807	-215
TOTAL COMPREHENSIVE INCOME	89,930	73,955
Subsidiary Guarantors	'	'
Supplemental Guarantor Information [Line Items]	'	'
NET SALES	468,056	379,870
COST OF SALES	206,624	159,959
GROSS PROFIT	261,432	219,911
SELLING AND ADMINISTRATIVE EXPENSES	39,069	35,566
AMORTIZATION OF INTANGIBLE ASSETS	15,774	9,945
INCOME (LOSS) FROM OPERATIONS	206,589	174,400
INTEREST EXPENSE - Net	71	624
INCOME BEFORE INCOME TAXES	206,518	173,776
INCOME TAX PROVISION (BENEFIT)	80,648	71,971
Net income	125,870	101,805
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	817	261
TOTAL COMPREHENSIVE INCOME	126,687	102,066
Non-Guarantor Subsidiaries	'	'
Supplemental Guarantor Information [Line Items]	'	'
NET SALES	36,300	27,501
COST OF SALES	24,966	19,629
GROSS PROFIT	11,334	7,872
SELLING AND ADMINISTRATIVE EXPENSES	5,892	4,046
AMORTIZATION OF INTANGIBLE ASSETS	262	439
INCOME (LOSS) FROM OPERATIONS	5,180	3,387
INTEREST EXPENSE - Net	136	296
INCOME BEFORE INCOME TAXES	5,044	3,091
INCOME TAX PROVISION (BENEFIT)	2,120	1,228
Net income	2,924	1,863
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	2,087	1,792
TOTAL COMPREHENSIVE INCOME	5,011	3,655
Eliminations	'	'
Supplemental Guarantor Information [Line Items]	'	'
NET SALES	-1,775	-2,162
COST OF SALES	-1,998	-1,959
GROSS PROFIT	223	-203
INCOME (LOSS) FROM OPERATIONS	223	-203
EQUITY IN INCOME OF SUBSIDIARIES	215,140	177,635
INCOME BEFORE INCOME TAXES	-214,917	-177,838
Net income	-214,917	-177,838
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	-6,711	-1,838
TOTAL COMPREHENSIVE INCOME	($221,628)	($179,676)

Supplemental_Condensed_Consoli2

Supplemental Condensed Consolidating Statement of Cash Flows (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Supplemental Guarantor Information [Line Items]	'	'
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	$115,707	$98,115
Capital expenditures	-8,097	-8,677
Acquisition of business, net of cash acquired	-263,892	134
Cash proceeds from sale of investment	'	5,000
Net cash used in investing activities	-271,989	-3,543
Excess tax benefits related to share-based payment arrangements	3,636	26,688
Proceeds from exercise of stock options	2,893	5,541
Dividends paid	-4,139	-702,406
Proceeds from 2011 credit facility-net	'	147,373
Other	-78	'
Proceeds from senior subordinated notes due 2020-net	'	542,000
Net cash provided by (used in) financing activities	2,312	19,196
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	154	139
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	-153,816	113,907
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	564,740	440,524
CASH AND CASH EQUIVALENTS, END OF PERIOD	410,924	554,431
TransDigm Group	'	'
Supplemental Guarantor Information [Line Items]	'	'
Intercompany activities	-2,620	660,335
Excess tax benefits related to share-based payment arrangements	3,636	26,688
Proceeds from exercise of stock options	2,893	5,541
Dividends paid	-4,139	-702,406
Net cash provided by (used in) financing activities	-230	-9,842
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	-230	-9,842
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	1,313	20,100
CASH AND CASH EQUIVALENTS, END OF PERIOD	1,083	10,258
TransDigm Inc.	'	'
Supplemental Guarantor Information [Line Items]	'	'
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	-6,676	-30,928
Capital expenditures	-569	-622
Acquisition of business, net of cash acquired	-263,892	134
Cash proceeds from sale of investment	'	5,000
Net cash used in investing activities	-264,461	4,512
Intercompany activities	113,924	-540,502
Proceeds from 2011 credit facility-net	'	147,373
Other	-78	'
Proceeds from senior subordinated notes due 2020-net	'	542,000
Net cash provided by (used in) financing activities	113,846	148,871
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	-157,291	122,455
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	536,863	406,891
CASH AND CASH EQUIVALENTS, END OF PERIOD	379,572	529,346
Subsidiary Guarantors	'	'
Supplemental Guarantor Information [Line Items]	'	'
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	123,148	132,178
Capital expenditures	-6,892	-7,566
Net cash used in investing activities	-6,892	-7,566
Intercompany activities	-117,122	-121,689
Net cash provided by (used in) financing activities	-117,122	-121,689
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	-866	2,923
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	7,900	4,494
CASH AND CASH EQUIVALENTS, END OF PERIOD	7,034	7,417
Non-Guarantor Subsidiaries	'	'
Supplemental Guarantor Information [Line Items]	'	'
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	2,134	-1,061
Capital expenditures	-636	-489
Net cash used in investing activities	-636	-489
Intercompany activities	2,919	-218
Net cash provided by (used in) financing activities	2,919	-218
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	154	139
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	4,571	-1,629
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	18,664	9,039
CASH AND CASH EQUIVALENTS, END OF PERIOD	23,235	7,410
Eliminations	'	'
Supplemental Guarantor Information [Line Items]	'	'
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	-2,899	-2,074
Intercompany activities	2,899	2,074
Net cash provided by (used in) financing activities	$2,899	$2,074