As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS - ECAM ENG 1 FIRE LOOP B FAULT APPEARED IN CRUISE. WHILE PERFORMING T/S, FOUDN SHORTING ON WIRES (WH1NVR1, WH2NVR1). REMOVED AND REPLACED ENG #1 CH.B PYLON FIRE-DETECTOR HARNESS PER AMM 26-12-63. PERFORMED WIRE CHECKS. COUNTINUITY GOOD. NO SHORT TO GROUND. PERFORMED FDU 1 BITE TEST PER AMM 26-12-00. PASSED. OK FOR SVC.