Document:

EX-4.2

 Exhibit 4.2 
 TRANSDIGM INC., 
 TRANSDIGM GROUP INCORPORATED, 

THE GUARANTORS NAMED HEREIN, 
 AND 
 THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., 

as Trustee 
  

 
 FIRST SUPPLEMENTAL INDENTURE

 Dated as of June 5, 2013 
 to 
 Indenture 

Dated as of October 15, 2012 
 by and among 
 TRANSDIGM INC., 

TRANSDIGM GROUP INCORPORATED, 
 THE GUARANTORS NAMED THEREIN, 
 AND 

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., 
 as Trustee 
  
  

5.50% Senior Subordinated Notes due 2020 
 of TransDigm Inc. 

 This FIRST SUPPLEMENTAL INDENTURE (this “Supplemental
Indenture”), dated as of June 5, 2013, by and among Arkwin Industries, Inc., a New York corporation (the “Guaranteeing Subsidiary”), TransDigm Inc., a Delaware corporation
(the “Company”), TransDigm Group Incorporated, a Delaware corporation (“TD Group”), Adams Rite Aerospace, Inc., a California corporation (“Adams Rite”), MarathonNorco
Aerospace, Inc., a Delaware corporation (“Marathon”), Champion Aerospace LLC, a Delaware limited liability company (“Champion”), Avionic Instruments LLC, a Delaware limited liability company
(“Avionic”), Skurka Aerospace Inc., a Delaware corporation (“Skurka”), CDA InterCorp LLC, a Florida limited liability company (“CDA”), Aviation Technologies, Inc., a Delaware
corporation (“ATI”), AvtechTyee, Inc., a Washington corporation (“Avtech”), Transicoil LLC, a Delaware limited liability company (“Transicoil”), AeroControlex Group, Inc., a
Delaware corporation (“AeroControlex”), Malaysian Aerospace Services, Inc., a Delaware corporation (“Malaysian”), Bruce Aerospace Inc., a Delaware corporation (“Bruce
Aerospace”), Bruce Industries, Inc., a Colorado corporation (“Bruce Industries”), CEF Industries, LLC, a Delaware limited liability company (“CEF”), Acme Aerospace, Inc., a Delaware
corporation (“Acme”), Dukes Aerospace, Inc., a Delaware corporation (“Dukes”), Semco Instruments, Inc., a Delaware corporation, (“Semco”), Hartwell Corporation, a California
corporation (“Hartwell”), McKechnie Aerospace DE, Inc., a Delaware corporation (“McKechnie Aerospace DE”), McKechnie Aerospace Holdings, Inc., a Delaware corporation (“McKechnie Aerospace
Holdings”), McKechnie Aerospace Investments, Inc., a Delaware corporation (“McKechnie Aerospace Investments”), McKechnie Aerospace US LLC, a Delaware limited liability company (“McKechnie Aerospace
US”), Texas Rotronics, Inc., a Texas corporation (“Rotronics”), Western Sky Industries, LLC, a Delaware limited liability company (“Western”), Schneller Holdings LLC, a Delaware limited
liability company (“Schneller Holdings”), Schneller LLC, a Delaware limited liability company (“Schneller”), Schneller International Sales Corp., an Ohio corporation (“Schneller
International”), Harco Laboratories, Incorporated, a Connecticut corporation (“Harco”), AmSafe Global Holdings, Inc., a Delaware corporation (“AmSafe Global”), AP Global Holdings, Inc., a
Delaware corporation (“AP Global Holdings”), AP Global Acquisition Corp., a Delaware corporation (“AP Global Acquisition”), AmSafe Industries, Inc., a Delaware corporation (“AmSafe
Industries”), Bridport Holdings, Inc., a Delaware corporation (“Bridport Holdings”), AmSafe, Inc., a Delaware corporation (“AmSafe Inc.”), AmSafe Aviation, Inc., a Georgia corporation
(“AmSafe Aviation”), AmSafe Commercial Products, Inc., a Delaware corporation (“AmSafe Commercial”), Bridport-Air Carrier, Inc., a Washington corporation (“Bridport-Air”),
Bridport Erie Aviation, Inc., a Delaware corporation (“Bridport Erie”), and AmSafe – C Safe, Inc., a Delaware corporation (together with TD Group, Adams Rite, Marathon, Champion, Avionic, Skurka, CDA, ATI, Avtech,
Transicoil, AeroControlex, Malaysian, Bruce Aerospace, Bruce Industries, CEF, Acme, Dukes, Semco, Hartwell, McKechnie Aerospace DE, McKechnie Aerospace Holdings, McKechnie Aerospace Investments, McKechnie Aerospace US, Rotronics, Western, Schneller
Holdings, Schneller, Schneller International, Harco, AmSafe Global, AP Global Holdings, AP Global Acquisition, AmSafe Industries, Bridport Holdings, AmSafe Inc., AmSafe Aviation, AmSafe Commercial, Bridport-Air and Bridport Erie, the
“Existing Guarantors”), and The Bank of New York Mellon Trust Company, N.A., as trustee (the “Trustee”) under the Indenture referred to below. Capitalized terms used herein and not otherwise defined
shall have the meaning assigned to them in the Indenture. 
 WITNESSETH: 

WHEREAS, the Company and the Existing Guarantors have heretofore executed and delivered to the Trustee an indenture, dated as of
October 15, 2012 (the “Indenture”), providing for the issuance by the Company of 5.50% Senior Subordinated Notes due 2020 (the “Notes”) and the guarantees thereof by each of the Existing
Guarantors; 
 WHEREAS, the Indenture provides that under certain circumstances described therein, newly created or
acquired Domestic Restricted Subsidiaries shall execute and deliver to the Trustee a supplemental indenture to the Indenture providing for a senior subordinated guarantee of payment of the Notes by such Domestic Restricted Subsidiary (the
“Guarantee”); 
 WHEREAS, all things necessary to make this Supplemental Indenture the legal,
valid and binding obligation of the Company, the Existing Guarantors and the Guaranteeing Subsidiary have been done; and 

WHEREAS, pursuant to Section 9.01(g) of the Indenture, the Trustee is authorized to execute and deliver this Supplemental
Indenture without the consent of the Holders of the Notes. 

 NOW, THEREFORE, in consideration of the foregoing and for other good and valuable
consideration, the receipt of which is hereby acknowledged, the Guaranteeing Subsidiary covenants and agrees for the equal and ratable benefit of the Holders of the Notes as follows: 

 

	 	1.	CAPITALIZED TERMS. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture. 

 

	 	2.	GUARANTEE, ETC. The Guaranteeing Subsidiary hereby agrees that from and after the date hereof it shall be a Guarantor under the Indenture and be bound by the
terms thereof applicable to Guarantors and shall be entitled to all of the rights and subject to all the obligations of a Guarantor thereunder. 

  

	 	3.	RATIFICATION OF INDENTURE; SUPPLEMENTAL INDENTURE PART OF INDENTURE. The Indenture is in all respects ratified and confirmed and all the terms, conditions and
provisions thereof shall remain in full force and effect. This Supplemental Indenture shall form a part of the Indenture for all purposes, and every holder of Notes heretofore or hereafter authenticated and delivered shall be bound hereby.

  

	 	4.	EXECUTION AND DELIVERY. The Guaranteeing Subsidiary agrees that the Guarantee granted by it pursuant to the terms hereof shall remain in full force and effect
notwithstanding any failure to endorse on each Note a notation of such Guarantee. 

  

	 	5.	NO RECOURSE AGAINST OTHERS. No past, present or future director, officer, employee, incorporator, stockholder or agent of the Guaranteeing Subsidiary (or any
successor entity) (other than the Company or the Existing Guarantors), as such, shall have any liability for any obligations of the Company, TD Group, the Guaranteeing Subsidiary or any other Guarantor under the Notes, any Guarantee, the Indenture
or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of the Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the
consideration for issuance of the Notes. 

  

	 	6.	NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE AND THE GUARANTEE GRANTED
HEREUNDER WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 

 

	 	7.	COUNTERPART ORIGINALS. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together
represent the same agreement. 

  

	 	8.	EFFECT OF HEADINGS. The Section headings have been inserted for convenience of reference only, are not to be considered part of this Supplemental Indenture and
shall in no way modify or restrict any of the terms or provisions hereof. 

  

	 	9.	THE TRUSTEE. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for
or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiary, the Existing Guarantors and the Company. 

 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be
duly executed as of the date hereof. 
  

					
	TRANSDIGM INC.
		
	By:	 	 /s/ Gregory Rufus

		 	Name:	 	Gregory Rufus
		 	Title:	 	Executive Vice President and Chief Financial Officer
	
	TRANSDIGM GROUP INCORPORATED
		
	By:	 	 /s/ Gregory Rufus

		 	Name:	 	Gregory Rufus
		 	Title:	 	Executive Vice President and Chief Financial Officer
	
	 ACME AEROSPACE, INC.

ADAMS RITE AEROSPACE, INC.
 AEROCONTROLEX GROUP,
INC.
 AMSAFE – C SAFE, INC.

AMSAFE AVIATION, INC.
 AMSAFE COMMERCIAL
PRODUCTS, INC.
 AMSAFE GLOBAL HOLDINGS, INC.
 AMSAFE, INC.
 AMSAFE INDUSTRIES, INC.
 AP GLOBAL ACQUISITION CORP.
 AP GLOBAL HOLDINGS, INC.

ARKWIN INDUSTRIES, INC.
 AVIATION TECHNOLOGIES,
INC.
 AVTECHTYEE, INC.
 BRIDPORT-AIR
CARRIER, INC.
 BRIDPORT ERIE AVIATION, INC.
 BRIDPORT HOLDINGS, INC.
 BRUCE AEROSPACE INC.

BRUCE INDUSTRIES, INC.
 DUKES AEROSPACE,
INC.
 HARTWELL CORPORATION
 HARCO
LABORATORIES, INCORPORATED
 MALAYSIAN AEROSPACE SERVICES, INC.
 MARATHONNORCO AEROSPACE, INC.
 MCKECHNIE AEROSPACE DE, INC.

MCKECHNIE AEROSPACE HOLDINGS, INC.

MCKECHNIE AEROSPACE INVESTMENTS, INC.
 MCKECHNIE AEROSPACE US LLC

		 	By:	 	McKechnie Aerospace DE, Inc., its sole member
	 SCHNELLER INTERNATIONAL SALES CORP.
 SEMCO INSTRUMENTS, INC.
 SKURKA AEROSPACE INC.

TEXAS ROTRONICS, INC.
 TRANSICOIL
LLC

		 	By:	 	Aviation Technologies, Inc., its sole member
	WESTERN SKY INDUSTRIES, LLC
		 	By:	 	 McKechnie Aerospace Investments, Inc.,
 its sole member

		
	By:	 	 /s/ Gregory Rufus

		 	Name:	 	Gregory Rufus
		 	Title:	 	Treasurer and Secretary

					
	 AVIONIC INSTRUMENTS LLC
 CDA INTERCORP LLC
 CEF INDUSTRIES, LLC
 CHAMPION AEROSPACE LLC
 SCHNELLER HOLDINGS LLC

SCHNELLER LLC

		 	By:	 	Schneller Holdings LLC, its sole member
		
	By:	 	TransDigm Inc., its sole member
		
	By:	 	 /s/ Gregory Rufus

		 	Name:	 	Gregory Rufus
		 	Title:	 	Executive Vice President and Chief Financial Officer

 
					
	THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS TRUSTEE
		
	By:	 	 /s/ Lawrence M. Kusch

		 	Name:	 	Lawrence M. Kusch
		 	Title:	 	Vice PresidentEX-10.1

 Exhibit 10.1 
 EXECUTION VERSION 
 JOINDER AGREEMENT 

THIS JOINDER AGREEMENT dated as of June 5, 2013 (this “Agreement”), is entered into between Arkwin Industries,
Inc., a New York corporation (the “New Subsidiary”), and CREDIT SUISSE AG, as administrative agent and collateral agent (in such capacities, the “Agent”), under that certain Amended and Restated Credit Agreement
dated as of February 28, 2013 (as the same may be further amended, supplemented or otherwise modified from time to time, the “Credit Agreement”), among TransDigm Inc., a Delaware corporation (the “Borrower”),
TransDigm Group Incorporated, a Delaware corporation, the Subsidiaries of the Borrower from time to time party thereto, the Lenders from time to time party thereto and the Agent. All capitalized terms used herein and not otherwise defined shall have
the meanings set forth in the Credit Agreement. 
 The New Subsidiary and the Agent, for the benefit of the Lenders, hereby
agree as follows: 
 1. The New Subsidiary hereby acknowledges, agrees and confirms that, by its execution of this Agreement,
the New Subsidiary will be deemed to be a Loan Party under the Credit Agreement and a Subsidiary Guarantor for all purposes of the Credit Agreement and shall have all of the obligations of a Loan Party and a Subsidiary Guarantor thereunder as if it
had executed the Credit Agreement. The New Subsidiary hereby ratifies, as of the date hereof, and agrees to be bound by, all of the terms, provisions and conditions contained in the Credit Agreement, including without limitation (a) all of the
representations and warranties of the Loan Parties set forth in Article III of the Credit Agreement (to the extent made or deemed made on or after the effective date hereof), (b) all of the covenants set forth in Articles V and VI of the Credit
Agreement and (c) all of the guaranty obligations set forth in the Guarantee and Collateral Agreement. Without limiting the generality of the foregoing terms of this paragraph 1, the New Subsidiary, subject to the limitations set forth in the
Guarantee and Collateral Agreement, hereby absolutely and unconditionally guarantees, jointly and severally with the other Guarantors, to the Agent and the Lenders, the prompt payment of the Additional Obligations in full when due (whether at stated
maturity, upon acceleration or otherwise) to the extent of and in accordance with Guarantee and Collateral Agreement. 
 2. If
required, the New Subsidiary is, simultaneously with the execution of this Agreement, executing and delivering such Collateral Documents (and such other documents and instruments) as reasonably requested by the Agent in accordance with the Credit
Agreement. 
 3. The New Subsidiary hereby waives acceptance by the Agent and the Lenders of the guaranty by the New Subsidiary
upon the execution of this Agreement by the New Subsidiary. 
 4. This Agreement may be executed in any number of counterparts,
each of which when so executed and delivered shall be an original, but all of which shall constitute one and the same instrument. 
 5. THIS AGREEMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAWS OF THE STATE OF NEW YORK. 

 IN WITNESS WHEREOF, the New Subsidiary has caused this Agreement to be duly executed by its
authorized officer, and the Agent, for the benefit of the Lenders, has caused the same to be accepted by its authorized officer, as of the day and year first above written. 

 

							
	ARKWIN INDUSTRIES, INC.
			
		 	by	 	 /s/ Gregory Rufus

		 		 	Name:	 	Gregory Rufus
		 		 	Title:	 	Secretary and Treasurer

 
							
	Acknowledged and accepted:
	
	CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, as Agent
			
		 	by	 	 /s/ Kevin Buddhdew

		 		 	Name:	 	Kevin Buddhdew
		 		 	Title:	 	Authorized Signatory

  

							
		 	by	 	 /s/ Michael D’Onofrio

		 		 	Name:	 	Michael D’Onofrio
		 		 	Title:	 	Authorized Signatory

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