F-15 aircraft engine tested in 'Hush House' Published Feb. 6, 2020 By Airman 1st Class Madeline Herzog 48th Fighter Wing Public Affairs ROYAL AIR FORCE LAKENHEATH, England -- 48th Maintenance Group aerospace propulsion technicians test an F-15 aircraft engine at Royal Air Force Lakenheath, England, Feb. 5, 2020. Technicians test and verify every engine to ensure each one is combat performance ready for the fighter squadrons at the Liberty Wing. (U.S. Air Force photo by Airman 1st Class Madeline Herzog)