The Department of Defense, through the Defense Logistics Agency (DLA) Aviation at Philadelphia, PA, is seeking proposals for the procurement of 80 units of a hydraulic servovalve, identified by NSN 7R-1650-015295568-QE and reference number 4308104-7. This procurement is subject to strict source approval requirements, as the item is flight critical and must be acquired from sources specified on a source control drawing, with no available technical data for alternative sourcing. Interested vendors must provide comprehensive documentation for source approval, including relevant experience and data, as offers lacking this information will not be considered. For inquiries, potential bidders can contact Sean Geiger at (215) 737-6825 or via email at sean.geiger@dla.mil.