As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS - INFO TO MX: ENG 1 FIRE LOOP A FAULT ECAM APPEARED AND DISAPPEARED MULTIPLE TIMES DURING FLIGHT. WHILE CHECKING INSULATION RESISTANCE AT FDU 1 LOOP A CONNECTOR PIN J-GRD & SHAKING LOOP A HARNESS 4165KS GOT A FLUCTUATION IN RESISTANCE FROM <100MOHMS TO 4 OHMS CHECKED 4165KS & FOUND CHAFING AT 4033VC MAKING CONTACT TO HARNESS SHIELD. REMOVED & REPLACED ENG 1 LOOP A HARNESS 4165KS PER AMM 26-12-61. FDU 1 BITE PER AMM 26-12-00. TEST OK. OK FOR SERVICE.