Tech Sgt. Shelly Pavcik, aircraft structural maintenance technician with the 911th Maintenance Squadron, works on a C-17 Globemaster III engine as part of a home station check inspection at the Pittsburgh International Airport Air Reserve Station, Pennsylvania Aug. 25, 2020. HSCs are required for the C-17 every 120 days to ensure the aircraft is in working order. (U.S. Air Force photo by Senior Airman Grace Thomson)