Corey Seeber checks the inside of a C-17 engine here June 18 to make sure there are no leaks in the reverser at the engine test cell. The all-civilian engine shop installs, inspects and repairs five to six engines a month. The thrust reverser is a secondary braking system for the aircraft. Mr. Seeber is an aviation maintenance technician with United Airlines. (U.S. Air Force photo/Senior Airman Katie Gieratz)

Jerry Zuk repairs a thrust reverser here June 18. Thrust reversers are disassembled into separate pieces and every piece is inspected and repaired before being put back together. The all-civilian engine shop installs, inspects and repairs five to six engines a month. Mr. Zuk is an aviation maintenance technician with United Airlines. (U.S. Air Force photo/Senior Airman Katie Gieratz)

Jerry Zuk installs a forward ring on a thrust reverser here June 18. The forward ring attaches the thrust reverser to the engine. The all-civilian engine shop installs, inspects and repairs five to six engines a month. Mr. Zuk is an aviation maintenance technician with United Airlines. (U.S. Air Force photo/Senior Airman Katie Gieratz)

Danny Page drains the fuel filter on a C-17 engine in the test cell here June 18. The fuel filter must be drained before it can be inspected for contaminates. The all-civilian engine shop installs, inspects and repairs five to six engines a month. Mr. Page is an aviation maintenance technician with United Airlines. (U.S. Air Force photo/Senior Airman Katie Gieratz)

Danny Page inspects the fuel filter for any contamination after a test run on a C-17 engine here June 18. The all-civilian engine shop installs, inspects and repairs five to six engines a month. Mr. Page is an aviation maintenance technician with United Airlines. (U.S. Air Force photo/Senior Airman Katie Gieratz)

Tim Gorman uses a bore scope to look into a hot part of the engine at the C-17 engine test cell building here June 18. The all-civilian engine shop is responsible for installing, inspecting and repairing engines for the Air Force. Mr. Gorman is an aviation maintenance technician with United Airlines. (U.S. Air Force photo/Senior Airman Katie Gieratz)

Aviation maintenance technicians work on a C-17 engine at the engine test cell building here June 18. The all-civilian engine shop installs, inspects and repairs five to six engines a month. (U.S. Air Force photo/Senior Airman Katie Gieratz)

Corey Seeber works on a C-17 engine here June 22. Mr. Seeber is an aviation maintenance technician with United Airlines. (U.S. Air Force photo/Senior Airman Katie Gieratz)

Corey Seeber disconnects the hydraulic lines from the hydraulic pumps on a C-17 engine on Charleston AFB, June 22. The pumps and lines are disconnected so that inspectors can check each piece separately. Mr. Seeber is an aviation maintenance technician with United Airlines. (U.S. Air Force Photo/Senior Airman Katie Gieratz)

Corey Seeber disconnects the hydraulic lines from the hydraulic pumps on a C-17 engine here June 22. The pumps and lines are disconnected so that inspectors can check each piece separately. The all-civilian engine shop installs, inspects and repairs five to six engines a month. Mr. Seeber is an aviation maintenance technician with United Airlines. (U.S. Air Force photo/Senior Airman Katie Gieratz)