Senior Airman William Fine adjusts the bootstrap accumulator on an A-10 Thunderbolt II during a seven-level inspection at Bagram Airfield, Afghanistan, Aug. 9, 2012. Each time an A-10 accomplishes 500 flying hours, the maintainers put the aircraft through a periodic maintenance phase which lasts approximately four to five days. During this time, the maintainers give the aircraft a complete overhaul, looking for foreign object debris, damage, cracked or worn parts. Fine is an aircraft maintenance technician assigned to the 455th Expeditionary Aircraft Maintenance Squadron. (U.S. Air Force photo/Staff Sgt. Jeff Nevison)