Staff Sgt. Logan Schiermeyer, 22nd Maintenance Squadron hydraulics systems craftsman, removes a boom hoist gear box from a KC-135 Stratotanker during an isochronal inspection Dec. 2, 2020, at McConnell Air Force Base, Kansas. The gear box is maintained each isochronal inspection, which occurs every two years. It is a part of the boom hoist unit, which utilizes a cable to maneuver the boom during aerial refueling operations. (U.S. Air Force photo by Senior Airman Alan Ricker)