What was found
FLT#823, JF-LAX. (ETOPS) ' ENG 1 LOOP B FAULT DURING DESCENT ( ENGINE FIRE DETECTION SYSTEMS 2) LOOP B ); REF L/P 4051287-2 (SHIELDING FRAYED EXCESSIVE PLACY ON AGB SHIELDING GROUND AND MOVEMENT AT THE HEAD OF HARNESS 4002WD2 REPLACED 4002WD2 PER AMM 26-12-17 OPS TEST GOOD PERFORMED IDLE RUN NO FAULTS IN PFR.WHEN AC ARRIVED FOLLOWING FAULTS IN PFR 26-00 ENG FIRE LOOP B FAULT 26-12-15 CHECK ENG1 FIRE LOOP B AGB) FOR CORRECTIVE ACTION. THIS ACTION CLEARS MDDR 565951. MX-4 UPDATED, PLACARD REMOVED.' (SUPPLEMENTAL INFORMATION ADDED)