As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS - ENG 1 FIRE LOOP B FAULT. FOUND WIRE HARNESS (41WD1) SHORTING TO GND 3.9M OHMS. FOUND DETECTOR (4WD1) SHORTING TO GND 5.2M OHMS. REMOVED AND REPLACED HARDWIRE (41WD1) PER WDM 26-12-07. REMOVED AND REPLACED ENG 1 PLYON LOOP B (4WD1) PER AMM 26-12-16-000-802-A. OPERATIONAL CHECK OK PER AMM 26-12-00