As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. AT LOW ALTITUDE ON APPROACH AND ON DEPARTURE AFTER TAKE-OFF THERE IS A LOUD ACARS DATA STREAM NOISE BLEED OVER ONTO VHF 1 & 2 COM RADIOS. IT INTERFERES WITH REQUIRED RADIO TRANSMISSION RECEPTION POSSIBLE CELL PHONE NOISE, BUT NOT TYPICAL WITH OTHER AIRCRAFT. REMOVED AND REPLACED AUDIO MANAGEMENT UNIT, IAW AMM 23-51-00.