AEDC Test Technology, Analysis and Evaluation Branch validates, advances testing
Stan Freeze, an outside machinist, removes a plug from a borescope inspection port on an F404 engine Jan. 10, 2020, in a sea level test cell at Arnold Air Force Base, Tenn. The engine is being prepared for use as a testbed by the Arnold Engineering Development Complex Technology, Analysis and Evaluation Branch. (U.S. Air Force photo by Jill Pickett)