As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 HF RADIO WAS UNABLE TO UNDERSTAND VOICE TRANSMISSIONS FROM SFO RADIO. NR 2 HF WAS NORMAL. REMOVED AND REPLACED HF TRANSCEIVER REF MM 23 11 21. PERFORMED GROUND FUNCTIONAL TEST (HF COMM SYS OPS AND SYSTEM TESTS). TESTED GOOD REF MM 23 11 00.