Air Force Photos

Senior Airman Tim Johnson and Senior Airman Hunter Mitchell, both 179th Airlift Wing Maintenance Group aerospace propulsion specialists, , evaluate an engine of the C-130H Hercules while it is running June 26, 2018, in Mansfield, Ohio. The diagnostic test requires the engine to be running for the Airman to properly identify the cause of this particular issue and is also known by aircraft mechanics as "man on the stand." (U.S. Air National Guard photo by Capt. Paul Stennett)