As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#816, SFO-JFK. (ETOPS) "PFR SHOWS ENGINE 1 FIRE LOOP A FAULT ( ENGINE FIRE DETECTION SYSTEMS 1) LOOP A ). REMOVED NAD REPLACED ENG1 LOOP A FOWARD FIRE/OVERHEAT DETECTOR ( FIN 4002WD1) PER AMM 26-12-17 OPSCHK NORMAL. THIS CLEARS MDDR 596990 MX4 UPDATED PLACARD REMOVED.