As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, NR1 HF RADIO WILL NOT CHANNELIZE AND HAD NO RECEPTION, NR 2 HF RADIO WOULD NOT WORK. THE CREW RETURNED TO DEPARTURE WITH OUT FURTHER INCIDENT. MX REPLACED NR1 ACCESSORY COUPLER AND 2 COAX CONNECTORS ON THE NR2 ACCESSORY COUPLER. OPS CHECK GOOD IAW MM 23-10-0. ACFT WAS RETURNED TO SERVICE.