As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT # 333 BOS-SFO (ETOPS). "ENG 2 FIRE LOOP A FAULT IN FLIGHT ( ENGINE FIRE DETECTION SYSTEMS 1) LOOP A ).; RREMOVED AND REPLACED ENG 2 AGB FIRE DETECTOR LOOP A IAW AMM 26-12-17. OPS CHK GOOD. MCC NOTIFIED. MX-4 UPDATED. PLACARD REMOVED.