What was found
(CAN) ON AC 9193, CUSTOMER FOUND DURING LH ENGINE SHUT DOWN AC BUS 1 SHED. PER CAIMS READ OUT, THEY GET THE FOLLOWING MESSAGE: ACPC APULC-EPLC CONTACTOR-K1 FAILED. DURING FURTHER TS, THEY FOUND ON THE CAIMS AC SYNOPTIC DATA - ACPC B THE AC BUS 1 WAS STILL CONNECTED TO THE VFG #1. THEY SUSPECTED GLC 1/K5 AS THE REASON FOR. FOR TS, THEY WANTED TO SWAP CONTACTOR K5 WITH K7. DURING ACCESS TO THE ACPC, THEY FOUND BURN MARKS UNDER THE CONTACTOR K7 FROM A FOD/SCREW. THE SCREW MAY BE FROM THE PLASTIC COVER OF CONTACTOR K7. ACPC REPLACED (TC# 20190801008)