C-130J fleet upgrades engines

Tech Sgt. Joseph Griffin, 403rd Maintenance Squadron aerospace propulsion craftsman, inspects a C130J engine after its gear mounted accessory drive was removed for the installation of a propeller break. 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)