What was found
FLT # 604, SDQ-EWR(AIR RETURNED BACK TO SDQ).ELEC GEN 2 FAULT IN FLIGHT STARTED APU AND RETURNED TO SDQ. GEN 2 DID NOT RESET ( IDG 2 DISCONNECTED (N503-N655) ) ; T/S IDG 2 INOP DUE TO MSG FAILURE OF FEEDER OF POR SENSE WIRING PER TSM 24-20-00-810-952-A. FOUND PHASE C WIRE PIN AT PLUG 400VC2-A AND RECEPTACLE 400VC2 WITH OVERHEAT ARCING FAILURE. REMOVED AND REPLACED IDG2 CABLE ASSY AND 400VC2 RECEPTACLE. - IDG 2 RECONNECTED AND OPS CKS NORMAL. . MDDR CLEARED , MX4 UPDATED.