As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 HF CHECKED OUT OK ON THE GROUND IN OAKLAND. EN ROUTE NR 1 HF HAD A HARD TIME TUNING AND WAS UNREADABLE. HF NR 1 SEEMED TO TRANSMIT OK IN DATA MODE. USED HF NR 2 FOR ATC ARINC. PLACED ON MEL SCHEDULED MTCE STOP INTO HNL ON FLT 888. DIVERSION TIME 24 MINUTES. REPLACED NR 1 HF COUPLER ANTENNA PER AMM 23 11 61 400 801. REPLACED NR 1 HF TRANSCEIVER PER AMM 23 11 21 400 801. SYSTEM OPERATIONAL TEST CHECK GOOD.