Check Engine
Staff Sgt. Derek Malecki, 52nd Maintenance Squadron aerospace propulsion craftsman, inspects an F-16 engine at Spangdahlem Air Base, Germany, Oct. 17, 2017. The engine propulsion shop will conduct a preventive maintenance inspection on an F-16 engine every 400 flying hours to make sure the engine is running properly. (U.S. Air Force photo by Staff Sgt. Jonathan Snyder)

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Photo by: Staff Sgt. Jonathan Snyder |  VIRIN: 171017-F-RH756-0011.JPG