The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the repair and modification of a flow control valve, identified by NSN 7R-4810-014833165-KB, with a quantity of 11 units required. The procurement is critical as the item is flight critical, and the government does not possess the necessary data or rights to purchase or contract repair from alternative sources, making it uneconomical to reverse engineer. Interested vendors must be approved sources and are required to submit specific documentation with their proposals, as the government intends to negotiate with only one source under FAR 6.302-1. Proposals must be submitted within 45 days of the notice, and interested parties can contact Alyssa T. Thieu at (215) 697-0169 or via email at alyssa.thieu@navy.mil for further information.