The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is soliciting proposals for the procurement of the "16--MAIN MODULE." This is a sole source requirement, indicating that the government does not possess sufficient data to contract with any source other than the current approved supplier. The items sought are critical components related to helicopter rotor blades, drive mechanisms, and components, which play a vital role in military aviation operations. Interested vendors must ensure they are an approved source and submit the necessary documentation as outlined in the NAVSUP WSS Source Approval Brochure, available online. For further inquiries, potential bidders can contact Danielle Cutrera at 215-697-6566 or via email at danielle.cutrera@navy.mil.