The Department of Homeland Security, specifically the U.S. Coast Guard, is seeking potential vendors for the repair and overhaul of environmental control components for the HC-144 aircraft. This sources sought notice aims to identify qualified vendors who possess documented past experience, FAA Part 145 certification, and an Original Equipment Manufacturer (OEM) license to provide the necessary services for specific components manufactured by Hamilton Sundstrand Corporation. The components requiring repair include valves, heat exchangers, and air cycle machines, which are critical for the operational efficiency of the aircraft. Interested vendors must submit their responses by November 30, 2025, at 4:00 p.m. EST, and can direct inquiries to Mr. Dmitri Mercer at Dmitri.E.Mercer@uscg.mil, ensuring to include the Sources Sought # 70Z03826IL0000004 in the subject line.