The "Aviation Source Approval and Management Handbook" outlines policies and procedures for the approval and management of sources supplying critical aviation items to the Department of Defense (DoD). It promotes full and open competition while addressing various source types including prime contractors, original equipment manufacturers (OEMs), licensed manufacturers, and organizations involved in maintenance and repair. The document details responsibilities associated with sourcing processes, defining Source Approval Requests (SAR), and risk management strategies during procurement. The handbook emphasizes the importance of maintaining quality assurance, validating supplier capabilities, and ensuring compliance with technical requirements. It provides guidance on reverse engineering processes, the procurement of surplus materials, and local purchasing policies. Notably, it introduces the concept of source reciprocity, allowing for the approval of sources recognized by different service branches. The handbook serves as a comprehensive resource for military entities seeking to ensure the reliability and safety of aviation parts, improving overall operational readiness by establishing stringent sourcing and approval frameworks.