Document:

Supplement No. 8

 Exhibit 10.3 
 EXECUTION COPY 
 SUPPLEMENT NO. 8 dated as of
December 2, 2009 (this “Supplement”), 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 AG (formerly known as
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 from time to time party thereto (the “Lenders”), and Credit Suisse AG (formerly known as 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. 
  

			
	DUKES AEROSPACE, INC.
		
	by	 	 /s/ Gregory Rufus

		 	Name: Gregory Rufus
		 	Title: Secretary and Treasurer
		
		 	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: Dukes Aerospace, Inc.
		
		 	Jurisdiction
		 	of Formation: Delaware
		
		 	Location of Chief
		 	Executive Office:
		 	9060 Winnetka Avenue
		 	Northridge, CA 91324-3293

			
	CREDIT SUISSE AG, CAYMAN
	ISLANDS BRANCH (formerly known as
	Credit Suisse, Cayman Islands Branch), as Agent
		
	by	 	 /s/ Robert Hetu

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

		 	Name: Christopher Day
		 	Title: Associate

 Schedule I to 
 Supplement No. 8 
 to the Guarantee and 
 Collateral Agreement 
 LOCATION OF COLLATERAL – DUKES AEROSPACE, INC. 
  

			
	 Description
	 	 Location

		
	Inventory, machinery, equipment and other personal property	 	 9060 Winnetka Avenue
 Northridge, CA 91324

		
	Inventory, machinery, equipment and other personal property	 	 Unit No. 109
 5456 East
McDowell Road
 Mesa, AZ 85215

 JURISDICTION OF FORMATION 
 Delaware 
 ORGANIZATION NUMBER (OR EQUIVALENT) (FROM
JURISDICTION OF FORMATION) 
 4730861 

 Schedule II to 
 Supplement No. 8 
 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

					
	 Dukes Aerospace, Inc.
	 	1	 	TransDigm Inc.	 	5,000 shares of common stock	 	100%

 DEBT SECURITIES 
  

							
	 Issuer
	 	 Principal
Amount
	 	 Date of Note
	 	 Maturity Date

	
	NONE

 INTELLECTUAL PROPERTY 
  

	
	NONEJoinder Agreement

 Exhibit 10.4 
 EXECUTION COPY 
 JOINDER AGREEMENT 
 THIS JOINDER AGREEMENT (this “Agreement”), dated as of December 2, 2009, is entered into between DUKES AEROSPACE,
INC., a Delaware corporation (the “New Subsidiary”), and CREDIT SUISSE AG (formerly known as Credit Suisse), as Agent, under that certain Credit Agreement, dated as of June 23, 2006 (as the same may be 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, 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. 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 Loan
Guarantor for all purposes of the Credit Agreement and shall have all of the obligations of a Loan Party and a Loan 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 Loan Guarantors, to the Agent and the Lenders, the prompt payment of the Secured Obligations in full when due (whether at stated maturity, upon acceleration or otherwise) to the extent of and in accordance with
the 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 requested by the Agent in accordance with the Credit Agreement, except for items listed on Schedule I hereto which will be executed and
delivered as soon as practical. 
 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. 
 [Remainder of page intentionally left blank] 

 IN WITNESS WHEREOF, the New Subsidiary has caused this Agreement to be duly executed by
their respective 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. 
  

			
	 DUKES AEROSPACE, INC.

		
	 by
	 	 /s/ Gregory Rufus

		 	Name: Gregory Rufus
		 	Title: Secretary and Treasurer

			
	Acknowledged and accepted:
	
	CREDIT SUISSE AG,
	CAYMAN ISLANDS BRANCH (formerly known as
	Credit Suisse, Cayman Islands Branch), as Agent
		
	by	 	 /s/ Robert Hetu

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

		 	Name: Christopher Day
		 	Title: Associate

 SCHEDULE I 
 ITEMS TO BE EXECUTED AND DELIVERED

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00166-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00166-of-00352.parquet"}]]