As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOTH HF RADIO'S WOULD TUNE ON ALL APPROPRIATE FREQUENCIES BUT NEITHER PILOT COULD TRANSMIT ON ANY HF FREQ. SELCAL WORKED NOTE NEITHER PILOT COULD WE COULD HEAR ATC AND OTHER TRAFFIC ON ALL HG FREQ'S BUT COULD NOT TRANSMIT. GROUNDED - YES. ON DEFERRAL. ATB