As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT RETURNED DUE TO BOTH HF RADIOS BEING INOPERATIVE, NO TUNE OR TRANSMIT. AN EMER WAS DECLARED & THE ACFT LANDED WITHOUT INCIDENT & THE ACFT WAS TAKEN OUT OF SERVICE. CONTACTED SFO BY PHONE TO CONFIRM FREQUENCIES TO BE USED. ESTABLISHED NORMAL CONTACT USING BOTH HF SYSTEMS SEVERAL TIMES & RETURNED TO ACFT TO SERVICE.