Senior Airman Ashley Frey, 455th Expeditionary Aircraft Maintenance Squadron crew chief, grabs a loose bolt from a safety valve on a C-130J Super Hercules, June 15, 2016, Bagram Airfield, Afghanistan. The safety valve was faulty and needed to be replaced in order to maintain the cabin pressure during flight. (U.S. Air Force photo by Senior Airman Justyn M. Freeman)

Senior Airman Ashley Frey, 455th Expeditionary Aircraft Maintenance Squadron crew chief, looks through a hole of a C-130J Super Hercules, June 15, 2016, Bagram Airfield, Afghanistan. The 455th EAMXS is responsible for repairing and maintaining military aircraft, as well as performing preventative maintenance inspections. (U.S. Air Force photo by Senior Airman Justyn M. Freeman)

Senior Airman Ashley Frey, 455th Expeditionary Aircraft Maintenance Squadron crew chief, takes the old safety valve down to the main compartment of a C-130J Super Hercules, June 15, 2016, Bagram Airfield, Afghanistan. Members of the 455th EAXMS ensure that aircraft are prepared for flight and return them to a mission-ready state once they land. (U.S. Air Force photo by Senior Airman Justyn M. Freeman)

Senior Airman Ashley Frey, 455th Expeditionary Aircraft Maintenance Squadron crew chief, grabs tools to replace a safety valve in a C-130J Super Hercules, June 15, 2016, Bagram Airfield, Afghanistan. Members of the 455th EAMXS ensures that aircraft are prepared for flight and return them to a mission-ready state once they land. (U.S. Air Force photo by Senior Airman Justyn M. Freeman)

Senior Airman Ashley Frey, 455th Expeditionary Aircraft Maintenance Squadron crew chief, fits the correct tool to replace a safety valve in a C-130J Super Hercules, June 15, 2016, Bagram Airfield, Afghanistan. Crew chiefs are tasked to advise on problems for maintaining, servicing and inspecting aircraft and use technical data to diagnose and solve maintenance problems on aircraft systems. (U.S. Air Force photo by Senior Airman Justyn M. Freeman)