Document:

Fifth Supplemental Indenture, dated as of May 7, 2008

 Exhibit 10.1 
 TRANSDIGM INC., 
 TRANSDIGM GROUP INCORPORATED, 
 THE GUARANTORS named herein 
 and 
 THE BANK OF NEW YORK TRUST COMPANY, N.A., as Trustee 
  
  
 FIFTH SUPPLEMENTAL INDENTURE

 Dated as of May 7, 2008 
 To 
 Indenture Dated as of June 23, 2006 
 by and among 
 TRANSDIGM INC., 
 TRANSDIGM GROUP INCORPORATED, 
 the GUARANTORS named therein and 
 THE BANK OF NEW YORK TRUST COMPANY, N.A., as Trustee 
  
  
 7-3/4% Senior Subordinated Notes
due 2014 
 of TransDigm Inc. 
  
  

 FIFTH SUPPLEMENTAL INDENTURE 
 FIFTH SUPPLEMENTAL INDENTURE (this “SUPPLEMENTAL INDENTURE”), dated as of May 7, 2008, among CEF Industries, Inc., a Delaware 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 and successor to Champion Aerospace Inc. (“CHAMPION”), Avionic Instruments LLC, a
Delaware limited liability company and successor to Avionic Instruments Inc. (“AVIONIC”), Skurka Aerospace Inc., a Delaware corporation (“SKURKA”), CDA InterCorp LLC, a Florida limited liability company and successor to CDA
Intercorp (“CDA”), Aviation Technologies, Inc., a Delaware corporation (“ATI”), Avtech Corporation, a Washington corporation (“AVTECH”), Transicoil LLC, a Delaware limited liability company and successor to Transicoil
Corp. (“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”, and, together with TD Group, Adams Rite, Marathon, Champion, Avionic, Skurka, CDA, ATI, Avtech, Transicoil, AeroControlex, Bruce Aerospace
and Bruce Industries, the “EXISTING GUARANTORS”), and The Bank of New York Trust Company, N.A., as trustee under the indenture referred to below (the “TRUSTEE”). 
 W I T N E S S E T H 
 WHEREAS, the Company and the Existing Guarantors have heretofore
executed and delivered to the Trustee an indenture (as supplemented by the First Supplemental Indenture thereto, dated as of November 2, 2006, the Second Supplemental Indenture, dated as of February 7, 2007, Third Supplemental Indenture,
dated June 29, 2007 and the Fourth Supplemental Indenture, dated August 10, 2007, the “INDENTURE”), dated as of June 23, 2006, providing for the issuance by the Company of 7-3/4% Senior Subordinated Notes due 2014 (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 “SUBSIDIARY GUARANTEE”); 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 Notes. 

 NOW THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the
receipt of which is hereby acknowledged, the Guaranteeing Subsidiaries covenant and agree 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
INDENTURES 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 Subsidiaries, the Existing Guarantors and the Company. 
 [The remainder of this page is intentionally left blank.] 

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

			
	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, Chief
 Financial Officer and
Secretary

	
	CHAMPION AEROSPACE LLC
		
	By:	 	TransDigm Inc., its sole member
		
	By:	 	/s/ Gregory Rufus
	Name:	 	Gregory Rufus
	Title:	 	 Executive Vice President and
 Chief Financial Officer

	
	ADAMS RITE AEROSPACE, INC.
		
	By:	 	/s/ Gregory Rufus
	Name:	 	Gregory Rufus
	Title:	 	Treasurer and Assistant Secretary
	
	MARATHONNORCO AEROSPACE, INC.
		
	By:	 	/s/ Gregory Rufus
	Name:	 	Gregory Rufus
	Title:	 	Treasurer and Assistant Secretary

			
	AVIONIC INSTRUMENTS LLC
		
	By:	 	TransDigm Inc., its sole member
		
	By:	 	/s/ Gregory Rufus
	Name:	 	Gregory Rufus
	Title:	 	 Executive Vice President and
 Chief Financial Officer

	
	SKURKA AEROSPACE INC.
		
	By:	 	/s/ Gregory Rufus
	Name:	 	Gregory Rufus
	Title:	 	Treasurer and Assistant Secretary
	
	CDA INTERCORP LLC
		
	By:	 	TransDigm Inc., its sole member
		
	By:	 	/s/ Gregory Rufus
	Name:	 	Gregory Rufus
	Title:	 	 Executive Vice President and
 Chief Financial Officer

	
	AVIATION TECHNOLOGIES, INC.
		
	By:	 	/s/ Gregory Rufus
	Name:	 	Gregory Rufus
	Title:	 	Treasurer and Secretary
	
	AVTECH CORPORATION
		
	By:	 	/s/ Gregory Rufus
	Name:	 	Gregory Rufus
	Title:	 	Treasurer and Secretary

			
	TRANSICOIL LLC
		
	By:	 	TransDigm Inc., its sole member
		
	By:	 	/s/ Gregory Rufus
	Name:	 	Gregory Rufus
	Title:	 	 Executive Vice President and
 Chief Financial Officer

	
	AEROCONTROLEX GROUP, INC.
		
	By:	 	/s/ Gregory Rufus
	Name:	 	Gregory Rufus
	Title:	 	Treasurer and Secretary
	
	MALAYSIAN AEROSPACE SERVICES, INC.
		
	By:	 	/s/ Gregory Rufus
	Name:	 	Gregory Rufus
	Title:	 	Treasurer and Secretary
	
	BRUCE AEROSPACE, INC.
		
	By:	 	/s/ Gregory Rufus
	Name:	 	Gregory Rufus
	Title:	 	Treasurer and Secretary
	
	BRUCE INDUSTRIES, INC.
		
	By:	 	/s/ Gregory Rufus
	Name:	 	Gregory Rufus
	Title:	 	Treasurer and Secretary
	
	CEF INDUSTRIES, INC.
		
	By:	 	/s/ Gregory Rufus
	Name:	 	Gregory Rufus
	Title:	 	Treasurer and Secretary

			
	THE BANK OF NEW YORK TRUST COMPANY, N.A., as Trustee
		
	By:	 	/s/ Roxane EllwangerSupplement No. 5, dated as of May 7, 2008

 Exhibit 10.2 
 SUPPLEMENT NO. 5 dated as of May 7, 2008, to the Guarantee and Collateral Agreement dated as of June 23, 2006 (the “Guarantee and Collateral Agreement”), among TRANSDIGM INC., a Delaware
corporation (the “Borrower”), TRANSDIGM GROUP INCORPORATED, a Delaware corporation (“Holdings”), each subsidiary of the Borrower from time to time party thereto (each such subsidiary individually a
“Subsidiary Guarantor” and collectively, the “Subsidiary Guarantors”; the Subsidiary Guarantors, Holdings and the Borrower are referred to collectively herein as the “Grantors”) and CREDIT SUISSE as
administrative agent and collateral agent (in such capacity, the “Agent”) for the Secured Parties (as defined therein). 
 A. Reference is made to the Credit Agreement dated as of June 23, 2006 (as amended, supplemented or otherwise modified from time to time, the “Credit Agreement”), among the Borrower, Holdings, each subsidiary of the
Borrower from time to time party thereto, the lenders named therein (the “Lenders”), and Credit Suisse, as administrative agent and collateral agent (in such capacity, the “Agent”) for the Lenders, as amended by
(i) that certain Amendment No. 1, Consent and Agreement dated as of January 25, 2007 and (ii) that certain Assumption Agreement dated as of February 7, 2007. 
 B. Capitalized terms used herein and not otherwise defined herein shall have the meanings assigned to such terms in the Credit Agreement or the Guarantee
and Collateral Agreement, as applicable. 
 C. The Grantors have entered into the Guarantee and Collateral Agreement in order to induce the
Lenders to make Loans and the Issuing Bank to issue Letters of Credit. Section 7.16 of the Guarantee and Collateral Agreement provides that additional Domestic Subsidiaries of the Loan Parties may become Subsidiary Guarantors and Grantors under
the Guarantee and Collateral Agreement by execution and delivery of an instrument in the form of this Supplement. The undersigned Subsidiary (a “New Subsidiary”) is executing this Supplement in accordance with the requirements of
the Credit Agreement to become a Subsidiary Guarantor and Grantor under the Guarantee and Collateral Agreement in order to induce the Lenders to make additional Loans and the Issuing Bank to issue additional Letters of Credit and as consideration
for Loans previously made and Letters of Credit previously issued. 
 Accordingly, the Agent and the New Subsidiary agree as follows:

 SECTION 1. In accordance with Section 7.16 of the Guarantee and Collateral Agreement, the New Subsidiary by its signature below
becomes a Grantor and Subsidiary Guarantor under the Guarantee and Collateral Agreement with the same force and effect as if originally named therein as a Grantor and Subsidiary Guarantor and the New Subsidiary hereby (a) agrees to all the
terms and provisions of the Guarantee and Collateral Agreement applicable to it as a Grantor and Subsidiary Guarantor thereunder and (b) represents and warrants that the representations and warranties made by it as a Grantor and Subsidiary
Guarantor thereunder are true and correct in all material respects on and as of the date hereof. In furtherance of the foregoing, the New Subsidiary, as security for the payment and performance in full of the Secured Obligations (as defined 

 
in the Guarantee and Collateral Agreement), does hereby create and grant to the Agent, its successors and assigns, for the benefit of the Secured Parties,
their successors and assigns, a security interest in and lien on all of the New Subsidiary’s right, title and interest in and to the Collateral (as defined in the Guarantee and Collateral Agreement) of the New Subsidiary. Each reference to a
“Grantor” or a “Subsidiary Guarantor” in the Guarantee and Collateral Agreement shall be deemed to include the New Subsidiary. The Guarantee and Collateral Agreement is hereby incorporated herein by reference.

 SECTION 2. The New Subsidiary represents and warrants to the Agent and the other Secured Parties that this Supplement has been duly
authorized, executed and delivered by it and constitutes its legal, valid and binding obligation, enforceable against it in accordance with its terms. 
 SECTION 3. This Supplement may be executed in counterparts (and by different parties hereto on different counterparts), each of which shall constitute an original, but all of which when taken together shall constitute
a single contract. This Supplement shall become effective when the Agent shall have received counterparts of this Supplement that, when taken together, bear the signatures of the New Subsidiary and the Agent. Delivery of an executed signature page
to this Supplement by facsimile transmission shall be as effective as delivery of a manually signed counterpart of this Supplement. 
 SECTION 4. The New Subsidiary hereby represents and warrants that (a) set forth on Schedule I attached hereto is a true and correct schedule of the location of any and all Collateral of the New Subsidiary and the New Subsidiary’s
organization number (or equivalent) from its jurisdiction of formation, (b) set forth on Schedule II attached hereto is a true and correct schedule of any and all (i) Equity Interests and debt securities now owned by the New Subsidiary and
(ii) Intellectual Property now owned by the New Subsidiary and (c) set forth under its signature hereto, is the true and correct legal name of the New Subsidiary, its jurisdiction of formation and the location of its chief executive
office. 
 SECTION 5. Except as expressly supplemented hereby, the Guarantee and Collateral Agreement shall remain in full force and effect.

 SECTION 6. THIS SUPPLEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 

SECTION 7. In case any one or more of the provisions contained in this Supplement should be held invalid, illegal or unenforceable in any respect, the
validity, legality and enforceability of the remaining provisions contained herein and in the Guarantee and Collateral Agreement shall not in any way be affected or impaired thereby (it being understood that the invalidity of a particular provision
in a particular jurisdiction shall not in and of itself affect the validity of such provision in any other jurisdiction). The parties hereto shall endeavor in good-faith negotiations to replace the invalid, illegal 

 
or unenforceable provisions with valid provisions the economic effect of which comes as close as possible to that of the invalid, illegal or unenforceable
provisions. 
 SECTION 8. All communications and notices hereunder shall be in writing and given as provided in Section 7.01 of the
Guarantee and Collateral Agreement. All communications and notices hereunder to the New Subsidiary shall be given to it at the address set forth under its signature below. 
 SECTION 9. The New Subsidiary agrees to reimburse the Agent for its reasonable out-of-pocket expenses in connection with this Supplement, including the
reasonable fees, other charges and disbursements of counsel for the Agent. 
 [Remainder of page intentionally left blank]

 IN WITNESS WHEREOF, the New Subsidiary and the Agent have duly executed this Supplement to the Guarantee
and Collateral Agreement as of the day and year first above written. 
  

			
	CEF INDUSTRIES, INC.
		
	By	 	 /s/ Gregory Rufus

	Name:	 	Gregory Rufus
	Title:	 	Secretary
		
		 	 Address:
 c/o TransDigm Inc.
The Tower at
Erieview
1301 East 9th Street, Suite 3710
Cleveland, OH 44114
Attn: Gregory Rufus
 Facsimile No: (216) 706-2937

		
		 	Legal Name: CEF Industries, Inc.
		
		 	Jurisdiction
of Formation: Delaware
		
		 	Location of Chief
Executive Office:
320 South Church Street
Addison, IL 60101

			
	CREDIT SUISSE, CAYMAN ISLANDS BRANCH, as Agent
		
	by	 	 /s/ Robert Hetu

	Name:	 	Robert Hetu
	Title:	 	Managing Director
		
	by	 	 /s/ Christopher Reo Day

	Name:	 	Christopher Reo Day
	Title:	 	Associate

 Schedule I to 
 Supplement No. 5 
 to the Guarantee and 
 Collateral Agreement 
 LOCATION OF COLLATERAL 
  

					
	 Description
	 	 	 	 Location

	Owned real property and all other property located thereon	 		 	320 South Church Street,
Addison, Illinois, DuPage County

 JURISDICTION OF FORMATION 
 Delaware 
 ORGANIZATION NUMBER (OR EQUIVALENT) (FROM 
 JURISDICTION OF FORMATION) 
 2103147

 Schedule II to 
 Supplement No. 5 
 to the Guarantee and 
 Collateral Agreement 
 Pledged Securities of the New Subsidiary 
 CAPITAL STOCK 
  

										
	 Issuer
	  	Number of
Certificate	  	Registered
Owner	  	Number and
Class of
Equity Interests	  	Percentage
of Equity
Interests	 
	 CEF Industries, Inc.
	  	C480	  	TransDigm Inc.	  	41,116 shares of
common stock	  	100	%
	 Calco International, Inc.
	  	2	  	CEF Industries, Inc.	  	250 shares of
common stock	  	100	%
	 Calco Manufacturing Co.
	  	2	  	CEF Industries, Inc.	  	1,000 shares of
common stock	  	100	%

 DEBT SECURITIES 
  

							
	 Issuer
	  	 Principal
 Amount
	  	 Date of Note
	  	 Maturity Date

	 NONE.
	  		  		  	

 INTELLECTUAL PROPERTY 
 NONE.

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