Tech. Sgt. Ronnie Graham, 403rd Maintenance Squadron jet engine craftsman, removes the panel from a WC-130J engine in preparation for a “man on the stand” check May 1, 2015. Most oil leaks can be troubleshot with the engine sitting static; however, in some cases the engines must be running for a maintainer to properly diagnose the source of the oil leak. (U.S. Air Force photo/Maj. Marnee A.C. Losurdo)