The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking qualified sources for the repair and modification of the Antenna EFA, identified by NSN 7R-1680-016017106-E7, with a requirement for 11 units. This procurement necessitates engineering source approval due to the flight-critical nature of the item, which mandates that only previously approved sources may be solicited, ensuring the quality and reliability of the part. Interested vendors must provide comprehensive documentation as outlined in the NAVSUP Source Approval Information Brochures, and must submit their proposals along with any required source approval information by the specified deadlines to Christian M. Markle at CHRISTIAN.M.MARKLE.CIV@US.NAVY.MIL. The contract award will only be made to offerors who meet the qualification requirements at the time of award, and the government is not utilizing FAR Part 12 policies for this solicitation.