U.S. Air Force HH-60 Pavehawk crew chiefs from the 33rd Helicopter Maintenance Unit perform a 600-hour phase inspection Jan. 10, 2017, at Kadena Air Base, Japan. Phase inspections are conducted on HH-60G Pavehawks every 600 flying hours to maintain and extend the life cycle of the aircraft. (U.S. Air Force photo by Senior Airman Omari Bernard)