Jared Hainsworth (left), A-10 Special Program Office, and Stephan Hall, Honeywell test engineer, look into the APU bay of a A-10 Thunderbolt II June 23, 2021, at Hill Air Force Base, Utah. The engineers were determining where they would be placing thermalcouplers to determine temperatures inside the bay during a ground test. (U.S. Air Force photo by Cynthia Griggs)