As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACV - ON TAKEOFF NR 1 AND NR 2 COMMS REPORTED CARRIER ONLY, NO VOICE. AIRCRAFT RETURNED TO STATION WITHOUT INCIDENT. MAINTENANCE RERACKED BOTH COMMS AND CLEANED MICROPHONE AND HEADSET JACKS. UNABLE TO DUPLICATE DISCREPANCY. AIRCRAFT RETURNED TO SERVICE. (M)