The Department of Defense, through the Defense Logistics Agency (DLA) Aviation at Philadelphia, PA, is seeking proposals for the procurement of 10 units of the Ball Screw Assembly, identified by NSN 7R-1680-016047407-V2. This procurement requires engineering source approval due to the flight-critical nature of the item, necessitating that only approved sources may submit proposals, as the technical data available does not support full and open competition. Interested vendors must provide comprehensive documentation demonstrating their capability to produce or repair the item, including any previous submissions for source approval, to ensure compliance with the qualification procedures established by the Government engineering activity. For further inquiries, potential bidders can contact Gregory T. Koch at (215) 737-4377 or via email at GREGORY.KOCH@DLA.MIL.