The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the repair and modification of starter control valves, identified by NSN 7R-4820-016629522-F7. The procurement involves a quantity of five units, which are classified as commercial/nondevelopmental items, and requires government source approval prior to contract award due to the flight-critical nature of the item. Interested vendors must provide necessary documentation for source approval along with their proposals, as only previously approved sources will be considered. Proposals must be submitted within 45 days of this notice, and interested parties can contact Shannon K. Fitzgerald at (215) 697-3638 or via email at SHANNON.K.FITZGERALD3.CIV@US.NAVY.MIL for further information.