As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 HF FAIL INDICATION IN BOTH ACTIVE AND STANDBY WINDOWS. ACFT GROUNDED. FAIL DISPLAYED ON RADIO TUNING PANEL NR 1 HF. BITE SHOWS LRU FAILED ON NR 1 HF TRANSCEIVER IAW BITE IAW FIM 23-11/801. REPLACED THE NR 1 TRANSCEIVER IAW AMM 23-11-21. OPS CHECKED NORMAL. HF COMMUNICATION TESTED GOOD IAW FIM 23-11/801.