The 35th Maintenance Squadron tests an aircraft engine at Misawa Air Base, Japan, June 25, 2013. The engine is tested in the test cell facility, also known as hush house. Hush house test facilities are primarily used for testing uninstalled engines following maintenance. This is to ensure engines meet all requirements and are safe for flight operations. The process of maintaining or testing an engine can take a considerable amount of time. (U.S. Air Force photo by Airman 1st Class Kenna Jackson)
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