As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 HF RADIO TRANSMIT FUNCTION FAILED DURING CRUISE. WILL NOT TRANSMIT FROM EITHER CONTROL PANEL OR YOKE SWITCHES. RECEIVES NORMALLY AND ALSO RECEIVES SELCAL. TRIED GOING TO DATA AS WELL AS RETURNING. THE SATCOM NR 1 OPERATES NORMALLY. ACFT GROUNDED. REMOVED & REPLACED NR 1 HF TRANSCEIVER IAW AMM 23-11-21, OPS NORMAL AFTER REMOVING TAG & RESETTING CIRCUIT BREAKER, GOOD, CLEAR TRANSMIT & RECEIVE.