The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking to procure three Control Units for Auxiliary Power Units (APU) on a sole source basis from AAR Supply Chain, Inc. The procurement involves National Stock Number (NSN) 7R-2995-014963686-VH, with a reference number of 4504587, and is critical for maintaining operational capabilities in aircraft systems. Interested parties are invited to submit capability statements or proposals within 45 days of this notice, although the government intends to negotiate exclusively with the identified source due to the lack of available data for alternative suppliers. For further inquiries, interested organizations can contact Kate N. Schalck at (215) 697-1020 or via email at kate.n.schalck.civ@us.navy.mil.