Fine tuning
MOODY AIR FORCE BASE, Ga. -- Staff Sgt. James O'Neal, 723rd Aircraft Maintenance Squadron, prepares for an engine run on an HC-130P Combat King Jan. 3 here. Engines that have monitoring instruments replaced must be ran to ensure they are providing the proper readings. (U.S. Air Force photo by Airman 1st Class Gina Chiaverotti)