The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the repair of NIIN 016017102, a flight-critical part requiring engineering source approval. The procurement necessitates that only approved sources, which possess unique design capabilities and manufacturing knowledge, can participate, as the technical data required for full and open competition is not adequately available. Interested parties must submit their proposals along with the necessary source approval documentation within 45 days of this presolicitation notice, with the primary contact for inquiries being Christian Markle at christian.markle@navy.mil or by phone at 215-697-6679.