The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking to procure five units of the Chassis Assembly, part number 1711270, under a presolicitation notice. This procurement requires engineering source approval due to the flight-critical nature of the item, necessitating that only approved sources may submit proposals, as the technical data necessary for full and open competition is not adequately available. Interested vendors must provide comprehensive documentation to demonstrate their capability and experience in producing similar items, with a submission deadline of 45 days from the notice publication date. For further inquiries, interested parties can contact Gina P. Sassane at (215) 697-2198 or via email at GINA.P.SASSANE.CIV@US.NAVY.MIL.