As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OBSERVED NR 2 RADIO HF FAILED ON ACTIVE AND STANDBY. ACFT GROUNDED. PERFORMED BITE ON NR 2 HF TRANSCEIVER IAW FIM 23-11 TASK 801. NR 2 TRANSCEIVER WILL NOT BITE. CYCLED POWER, NR 2 HF TRANSCEIVER BITE CHECKED NORMAL. NR 2 HF RADIO OPS NORMAL. REMOVED AND REPLACED THE NR 2 HF TRANSCEIVER IAW AMM 23-11-21/401. NR 2 HF TRANSCEIVER BITE AND OPS CHECKED GOOD.