As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#1621, LHR-BOS. (ETOPS) HF2 NO AUDIO; REMOVED AND REPLACED #2 HF TRANSCEIVER PER AMM 23-11-33. DID NOT FIX THE PROBLEM AT THIS TIME. ITEM TRANSFERRED TO LOG PAGE 3588617, ITEM 2. HF2 OPS CHECK GOOD AUDIO GOOD IN REF AMM 23-11-00-70-001-A. TRANSCEIVER FIXED PROBLEM PREVIOUS OPS CHECK IMPROPERLY DONE.