As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO TRANSMIT ON HF NR 1 AND HF NR 2 FROM BOTH THE CAPTAIN'S AND FIRST OFFICER'S POSITIONS, RECEIVES OK. REPLACED REMOTE ELECTRONICS UNIT PER MM 23 51 00 000 801. REPLACED NR 1 HF COUPLER PER AMM REF 23 11 61 000 801/23 11 61 400 801. ALL CONNECTIONS AT COUPLER WERE SOLID. PRECAUTIONARY REPLACED NR 1 HF TRANSCEIVER, OPS CHECK GOOD. VERIFICATION FLIGHT SUCCESSFUL.