As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS - UNABLE TO TUNE HF RADIOS 1 AND 2. HOURS LATER DURING FLIGHT RADIO 1 DID CORRECT ITSELF WITHOUT ANY RESET AND TUNE // OPERATIONAL CHECK OK ON HF 1 SYSTEM PER AMM 23-00-710-801A.502110 3/31/21. REMOVE/REPLACE 1 AND 2 HF COUPLER PER AMM 2336-000-801-A. OPS CHK GOOD. NO FAULTS NOTED. OK FOR SERVICE. COUPLER, ANTENNA OFF 43-2311-9-0001 03730 ON 43-2311-9-0001 04513. COUPLER, ANTENNA OFF 43-2311-9-0001 04497 ON 43-2311-9-0001 03329.