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 reciprocating pump, identified by NSN 7R-4320-011820200-EY, with a quantity of 19 units required for delivery FOB origin. The procurement is critical as the item is flight critical, and the government requires source approval prior to contract award, limiting competition to previously approved sources only. Interested parties must submit detailed technical data and source approval information with their proposals, as offers lacking this documentation will not be considered. For inquiries, Patrick J. Kilkenny can be contacted at (215) 697-2560 or via email at PATRICK.J.KILKENNY2.CIV@US.NAVY.MIL, with a proposal submission deadline of 45 days from the notice publication date.