The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the repair and modification of attitude heading reference equipment, identified by NSN 7R-5340-015226448-QE. The procurement involves a quantity of 41 units, with delivery terms set to FOB Origin, and requires government source approval prior to contract award due to the flight-critical nature of the item. Interested vendors must provide comprehensive documentation as outlined in the NAVSUP Source Approval Information Brochures, as offers lacking the necessary data will not be considered. For further inquiries, potential bidders can contact Jillian A. Eder at (215) 697-6490 or via email at JILLIAN.A.EDER.CIV@US.NAVY.MIL.