As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT FROM KSUU, THE CREW NOTICE THAT BOTH NR 1 AND NR 2 HF TRANSCEIVER WAS NOT TRANSMITTING OR RECEIVEING. THE CREW RETURNED TO KSUU WITHOUT INCIDENT. MAINTENANCE FOUND BOTH NR 1 AND NR 2 HF TRANSCEIVER WERE INOP. MAINTENANCE REPLACED BOTH HF TRANSCEIVER, OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.