Engine Wash
Senior Airman Sean Ryan, 15th Maintenance Squadron, aerospace propulsion journeyman communicates with a C-17 Globemaster III aircrew during an eco-wash at Joint Base Pearl Harbor-Hickam, Hawaii, November 18, 2021. C-17’s engines routinely receive this wash to prevent corrosion and to help with fuel efficiency. (U.S. Air Force photo by Airman 1st Class Makensie Cooper)