The Aviation Source Approval and Management Handbook outlines policies and procedures for the approval and management of sources supplying aviation parts critical to safety. It is designed to ensure that only qualified suppliers can provide these components, thereby enhancing competition and compliance with federal acquisition standards. The handbook details the types of sources eligible for approval, including original equipment manufacturers (OEMs), licensed manufacturers, and approved repair facilities. It emphasizes the need for thorough source approval requests (SARs), assessing supplier capabilities in manufacturing, repair, and quality assurance. The document also addresses reverse engineering and the use of surplus materials, establishing stringent guidelines for their acceptance. Specifically, the handbook outlines responsibilities for procuring activities, describes the SAR process, and clarifies the roles of cognizant Service Engineering Support Activities (ESA) in evaluating and approving suppliers. It stresses risk management and quality assurance throughout the procurement process while promoting collaboration across military services to streamline approvals. Through these rigorous standards, the handbook aims to maintain high safety levels and optimize resources in aviation equipment sourcing, aligning with federal regulations and improving operational readiness.