Functional checks
U.S. Air Force Staff Sgt. Kevin Donovan, 23rd Aircraft Maintenance Squadron crew chief, observes Airman 1st Class Eric Eckmann, 23rd AMXS crew chief, as he inspects the tail of an A-10C Thunderbolt II at Moody Air Force Base, Ga., Aug. 3, 2011. Crew chief technical training school is about six- months long and covers maintenance of the aircraft structures, systems and components. (U.S. Air Force photo by Senior Airman Stephanie Mancha/Released)