C-130J fleet upgrades engines

403rd Maintenance Squadron aerospace propulsion craftsmen, Tech Sgt. Joseph Griffin and Tech Sgt. Ben Cox look at parts needed to maintain a C-130J. Rolls Royce employees are traveling from base to base working with Airmen for a fleet-wide upgrade of engines in every C-130J aircraft.(U.S. Air Force photo/Senior Airman Heather Heiney)