As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FROM RJTY TO VTBU CREW NOTED NR 2 HF INOP WHEN KEYING MIC TO TUNE RADIO. TONE WAS FUZZY. CREW RETURNED AIRCRAFT TO RJTY AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT TO FAULTY LIGHTNING ARRESTOR AND FAULTY TRANSMIT COAX. MAINTENANCE REPAIRED COAX AND REPLACED LIGHTING ARRESTOR PER ALL APPLICABLE MANUALS. OPERATIONAL CHECK GOOD ON GROUND. AIRCRAFT WAS RETURNED TO SERVICE.