Joint Base Charleston

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U.S. Air Force Airman 1st Class Amber Engelhart tests a hush kit ear cups on an aircrew member's helmet Sept. 1, 2010, on Joint Base Charleston, S.C. Technicians test the communication systems in the helmets by connecting an external intercom unit. The external unit simulates an aircraft's communication system, allowing the technician to test both transmitting and receiving capabilities. Helmet communication tests are performed after every flight or every 90 days. Airman Engelhart is an aircrew flight equipment technician with 437th Operations Support Squadron. (U.S. Air Force photo/Senior Airman Timothy Taylor)


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