The document outlines the process for submitting Source Approval Requests (SARs) for national stock numbers (NSNs) within the Department of Defense (DoD). It specifies that SARs regarding open solicitations must be submitted directly to the designated buyer, while submissions for NSNs without open solicitations must utilize the DoD SAFE file transmission site. The process has transitioned to digital submission, eliminating the need for physical CDs. A request for a SAR drop-off can be initiated via email, following which the submitter will receive a link to upload their file, including specific information such as the CAGE code and NSN. The document advises potential submitters to assess cost-effectiveness and demand before proceeding with a SAR, pointing them to the DLA Supplier Requirements Visibility Application for insights on item forecasts. Furthermore, it notes that the review process may take over 180 days, and submitters will receive formal notification of the results. The PUB LOG FLIS tool is available for users to explore the management of NSNs and approved sources. Overall, this guidance facilitates a streamlined and efficient SAR submission process while ensuring compliance with operational requirements.

The Aviation Source Approval and Management Handbook outlines policies and procedures for approving sources of aviation parts within the Department of Defense. It emphasizes the importance of sourcing from approved manufacturers to maintain quality and safety standards for Critical Safety Items (CSIs). The handbook is structured into chapters covering general information, procuring activity responsibilities, Source Approval Requests (SARs), and additional sourcing processes such as reverse engineering. Key points include the criteria for eligible suppliers, the various source categories, and the approval process. Suppliers must demonstrate their capability to meet technical and quality requirements, evaluated through SARs that include comprehensive data about the supplier's manufacturing or repair capabilities. Procedures for local purchasing, service depot manufacturing, and the use of surplus materials are specifically addressed, highlighting a coordinated effort among multiple military services and agencies to align sourcing practices. The document aims to enhance competition and ensure reliable procurement of aviation components by establishing a clear, standardized framework for source approval, thereby emphasizing operational readiness and airworthiness across military aviation systems.