An F-15 Eagle engine test

Aerospace propulsion technicians assigned to the 48th Maintenance Group test an F-15 Eagle engine at RAF Lakenheath, United Kingdom, Feb. 5, 2020. Engines are tested inside of “hush houses” to minimize noise and provide a safe area for maintainers to inspect them. (U.S. Air Force photo by Airman 1st Class Madeline Herzog)