What was found
CLT - FLT 502 - ON CLIMB-OUT FROM CLT, CREW LOST ALL COMMUNICATIONS. UNABLE TO COMMUNICATE WITH ATC ON ANY RADIO. MIC'S WERE UNPLUGGED AND CHECKED. COMM 2 STARTED TO WORK ON 121.5. FLIGHT RETURNED TO FIELD AT CLT AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE CHECKED ALL 3 COMM R/T UNITS AND COCKPIT MIC'S AGAINST LOCAL FREQUENCIES. ALL 3 SYSTEMS OPERATIONALLY CHECK NORMAL. NO FAULTS NOTED. AIRCRAFT OK FOR SERVICE. (M)