Phase Inspection
Airman 1st Class William Franks, 2nd Maintenance Squadron crew chief, installs a bomb bay door on a B-52H Stratofortress during a phase inspection on Barksdale Air Force Base, La., April 26, 2013. Aircraft come in for phase inspections every 450 flight hours. The inspections also include repairs to the aircraft's systems, such as the engines, electrical and life support systems, and hydraulics. (U.S. Air Force photo/Airman 1st Class Andrew Moua)