**Exhibit 10.3**

**EXECUTION COPY**

**JOINDER AGREEMENT**

**TO THE AMENDED AND RESTATED SHAREHOLDERS AGREEMENT**

**OF**

**HAWKER BEECHCRAFT, INC.**

This Joinder Agreement (the “Joinder Agreement”) dated as of this 23rd day of March, 2009, to the Shareholders Agreement (as definedbelow) is by and between Worth W. Boisture, Jr. (the “Employee”) and Hawker Beechcraft, Inc., a Delaware corporation (the “Company”). 

**RECITALS**

**WHEREAS,** pursuant to that certain Stock Purchase Agreement between the Employee andthe Company dated as of March 23, 2009 (the “Stock Purchase Agreement”), the Employee has agreed to purchase 43,750 shares of common stock of the Company, par value $.01 per share (the “Common Stock”);

**WHEREAS**, in connection with the Employee’s initial purchase of shares of Common Stock pursuant to the Stock PurchaseAgreement, the Company deems it reasonably necessary and desirable for the Employee to execute and deliver to the Company an agreement pursuant to which the Employee agrees to be bound by the terms of the Amended and Restated Shareholders Agreement,dated May 3, 2007 (the “Shareholders Agreement”) by and among the Company, GSCP, Onex and the Management Shareholders, and the Employee shall thereafter be deemed to be a Management Shareholder for purposes of the ShareholdersAgreement. 

**NOW, THEREFORE,** in consideration of the foregoing, and of the representations, warranties, covenants and agreementscontained herein, and intending to be legally bound hereby, the parties hereto agree as follows: 

Section 1. Party to the Agreement. The parties hereto agree that the Employee is hereby made a party to the Shareholders Agreement as a Management Shareholder and the Employee hereby agrees to become a party tothe Shareholders Agreement and to be bound by, and subject to, all of the representations, covenants, terms and conditions of the Shareholders Agreement that are applicable to a Management Shareholder; provided, however, that forpurposes of Section 6.2 of the Shareholders Agreement, (i) the Employee’s Put Equity Securities shall only include those 43,750 Shares purchased pursuant to the Stock Purchase Agreement, (ii) in the case of the Employee’sretirement, the Employee’s Equity Put Option shall not be effective until the later of (A) the Employee’s retirement from the Company and (B) the 5 1/2 year anniversary of the Employee’s employment commencement date and (iii) the Employee’s Equity Put Option shall terminate upon the Initial Public Offering. Execution and delivery of thisJoinder Agreement by the Employee shall also constitute execution and delivery by the Employee of the Shareholders Agreement, without further action of any party. 

Section 2. Defined Terms. Capitalized terms not defined herein shall have the meanings set forth in the Shareholders Agreement unless otherwise noted. 

Section 3. Governing Law. This Joinder Agreement shall be governed by and construed and enforcedin accordance with the laws of the State of Delaware, without reference to the conflict of laws principles thereof. 

Section 4.Effective Date. This Joinder Agreement is effective as of March 23, 2009. 

Section 5. Counterparts. This JoinderAgreement may be executed in separate counterparts each of which shall be an original and all of which taken together shall constitute one and the same agreement. 

[*signature page follows*] 

 

2 

**IN WITNESS WHEREOF,** the parties have executed this Joinder Agreement as of the date first abovewritten. 

 
/s/ Worth W. Boisture, Jr.Worth W. Boisture, Jr.
 
HAWKER BEECHCRAFT, INC.By: /s/ Gail E. Lehman          
Name:  Gail E. Lehman

Title:    Vice President, General Counsel and              Corporate Secretary

*Signature Page to Joinder Agreement*