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A member of the Propulsion Instrumentation Working Group views the F404 engine test stand in the Arnold Engineering Development Complex Sea Level 1 engine test cell at Arnold Air Force Base, Tenn., Oct. 28, 2020. The PIWG members visited Arnold to view the test facility and discuss how the test stand will be used to help mature new turbine engine instrumentation. (U.S. Air Force Photo by Deidre Moon)
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