As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#1620, BOS-LHR. (ETOPS) 'HF RADIO 1 IN INTERMITTENT WORKED EARLY IN FLIGHT BUT TRANSMISSIONS ARE INTERMITTENT BY 30 DEGREES W. RECEPTION SEEMS OK. HF 2 WORKED AS NORMAL ( HF COMMUNICATIONS (LRCS) ); PERFORMED OPERATIONAL TEST IAW AMM 23-11-00 TEST OK SYSTEM FUNCTIONS NORMALLY AT THIS TIME.MDDR CLOSED MX4-UPDATED PLACARD REMOVED.