The Department of Defense, through the Defense Logistics Agency (DLA) Aviation at Philadelphia, PA, is seeking proposals for the procurement of 7 units of a fuel tank for aircraft, identified by NSN 7R-1560-015656152-CB. This procurement requires engineering source approval due to the flight-critical nature of the part, necessitating that only previously approved sources may submit proposals, as new sources must undergo a qualification process that cannot delay the award. Interested parties must provide comprehensive documentation as outlined in the NAVSUP Weapon Systems Support Source Approval Information Brochures, and proposals must be submitted within 45 days of this presolicitation notice, with contact for inquiries directed to Michael W. Bauder at MICHAEL.BAUDER@DLA.MIL.