As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 HF RADIO FREQUENCY WILL NOT SET AND WILL NOT TRANSMIT OR RECEIVE. ACFT GROUNDED. NR 2 HF TRANSCEIVER WILL NOT BITE TEST, NO LEDS COME ON, NR 1 HF BITE OK. REMOVED & REPLACED NR 2 HF TRANSCEIVER IAW AMM 23-11-21. BITE TEST & TUNE, TRANSMIT & RECEIVE WITH RADIO ALL OPS NORMAL IAW AMM 23-11-00. GROUND VERIFICATION OF ETOPS SIG SYS SUCCESSFUL.