As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS FLT 477 OAK-KOA - DURING CRUISE FLIGHT, CREW NOTED THAT THE NR 2 HF RADIO WOULD NOT TRANSMIT. CREW CONTINUED TO KOA WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE NR 2 HF TRANSCEIVER AND COMPLETED NECESSARY CHECKS PER AMM 23-11-21-00-001/400. AIRCRAFT WAS RELEASED FOR SERVICE AND PLACED ON FLIGHT VERIFICATION. THE NR 2 HF PASSED THE FLIGHT VERIFICATION AS OPERATIONAL THE FIRST 60 MINUTES OF FLIGHT.