What was found
ELECTRICAL GENERATOR OFF LT GENERATOR CONTROL BREAKER OPEN OR GENERATOR CONTROL SWITCH OFF & ENGINE NOT SHUT DOWN. MSG24-31661 WAS SHOWN. FLIGHT CREW DID NOT DISCONNECT IDG IN FLIGHT. SERVICED IDG OIL & CHECKED FILTER DIFFER PRESSURE INDICATOR NOT DETECTED. REPLACED GENERATOR CONTROL UNIT IAW MM, BUT NO HELP. DISCONNECT IDG R LT ENGINE IAW MEL, LT IDG INOPERATIVE. IAW JRH FOR ENG RUN FOR GCU REPLACE GROUND TEST & IDG DISCONNECT. LATCHED FAULT 24-31661 REFERRED TO FIM 24-21 TASK811. PERFORMED DETAILED INSPECTION OF IDG FEEDER CABLES UNDER ENGINE COWL A IDG WIRING HARNESSES. FOUND CHAFFED WIRES WITH EXPOSED CONDUCTOR ON WIRE HARNESS NR DM24001. REPLACED IDG IAW MM 24-11-01-0 01A. RAN NR 1 ENGINE, OPERATIONS & LEAK CHECKED OKAY.