As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYS - SFO REPORTS RT HF RADIO (8643HZ) VERY HARD TO RECEIVE TRANSMISSIONS. LT HF OK. PERFORMED BITE OF LT AND RT HF TRANSCEIVERS. NO FAULTS NOTED. CONTACTED SFO FREQ 5574. LT AND RT HF HAVE GOOD CONTACT. LT SIDE 3X3 RT SIDE 3X4. NO HF FAULT HISTORY IN LAST 30 DAYS. OK FOR SERVICE.