Small engine
A GTCP-3650 auxiliary power unit (APU) rests on a workstation Dec. 15, 2014, at Moody Air Force Base, Ga. The 23d Component Maintenance Squadron engine propulsion flight established a small gas section to act as the main repair facility for APUs. (U.S. Air Force photo by Senior Airman Olivia Bumpers/Released)

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Photo by: Senior Airman Olivia BumpersReleased |  VIRIN: 141215-F-XG484-004.JPG