As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1216, SFO-JFK. (ETOPS) ENG 2 FIRE LOOP B FAULT. APPEARED AND DISAPPEARED SEVERAL TIMES IN FLIGHT BEFORE FINALLY STAYING ON ( ENGINE FIRE DETECTION SYSTEMS 2) LOOP B ); (RESOLVED ON W/O: 1455881 TASKCARD: NR-00001) UPON INSPECTION OF LOOP 4002WD2 DISCOVERED DIVOTS ALONG AREAS ROUTED BY FIRE BRACKETS AND EDP. R/R LOOP 4002WD2 PER AMM 26-12-17, BITE + ENG RUN GOOD. NO FURTHER FAULTS AT THIS TIME. MDDR CLEAR, MX-4 UPDATED, PLACARD REMOVED.