The document outlines the procedures for submitting Source Approval Requests (SARs) for national stock numbers (NSNs) to the Defense Logistics Agency (DLA). For NSNs with open solicitations, SARs should be sent directly to the designated buyer; however, SARs are not applicable for items that are fully competitive. For NSNs without open solicitations, submissions must be made electronically via the DoD SAFE site, eliminating the need for mailing CDs. A request via email is required to obtain a "drop-off" link for file submission. The document also emphasizes the importance of reviewing item demand via the DLA Supplier Requirements Visibility Application before submission, as low demand may result in non-processing of SARs. Processing times can exceed 180 days, and formal notifications are sent upon decision completion. Additional resources and tools, such as the PUB LOG FLIS database, are provided to track NSN usage and approval sources. The guidance aims to streamline the process for suppliers while ensuring compliance and efficiency in the approval of items used by different military branches.

The Aviation Source Approval and Management Handbook is a comprehensive guide for managing source approvals related to aviation Critical Safety Items (CSIs). It outlines policies and procedures mandated by the Competition in Contracting Act and other federal regulations to ensure full and open competition while maintaining safety standards. The handbook details the types of sources eligible for approval, responsibilities of procuring activities, and the Source Approval Request (SAR) process. It emphasizes evaluating the manufacturing capabilities of potential suppliers, addressing risks, and performing thorough technical reviews to guarantee compliance with stringent quality assurance requirements. Key components include the assessment of sources based on historical provision, the need for SAR packages, and the importance of controlling surplus material procurement. Additionally, it addresses the roles of Integrated Materiel Managers and Engineering Support Activities in overseeing the approval process. The handbook serves as a vital resource for ensuring that aviation parts meet rigorous safety and quality standards, ultimately supporting the operational integrity and compliance of military aviation systems.