As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT AND RT HF TRANSMIT OK BUT NO RECEPTION PER CREW. RTF *S/D* BOTH COUPLERS WERE REPLACED AND TESTED IN THE SHOP. THE RESULT WAS NO FAULT FOUND. ALSO REPLACED WAS THE AUDIO MANAGEMENT UNIT. THE RESULTS OF TESTING ON THIS UNIT ARE NOT YET KNOWN.