As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT F/O UNABLE TO TRANSMIT USING R/T SWITCH OR HAND MIC VHF RADIOS MAKING POPPING SOUNDS AND TRANSMIT- TING WHEN RADIO NOT IN USE, INTERFERING WITH ATC COMMUNICATIONS. REF FIM 23-11-00-810-806. FOUND REU AT FAULT. REMOVED AND REPLACED REU PER AMM 23-51-01. VHF OPS CHECKED PER AMM 23-21-01, SYSTEM CHECKS GOOD. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1198362 S/N OFF 02227 UNIT, ACCY, AUD OFF 29-2351-9-0001 2227 ON 29-2351-9-0001 2237.