As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS - ENG 2 FIRE LOOP A FAULT ILLUMINATED DURING DESCENT FOR 2 MINS AND AGAIN IN PARKING. FOUND INTERNAL SHORT ON ENG #2, LOOP A, AGB (FWD) DETECTOR, FIN 4002WD1. REMOVED AND REPLACED PER AMM 26-12-17. BITE TEST OK. FAULT CLEARED. ENG RUN NORMAL. OK FOR SERVICE.