What was found
DUE TO REPORT OF EXTERNAL POWER CONTACTOR NOT OPENING AFTER EXTERNAL POWER WAS DE-SELECTED AND EXTERNAL POWER WAS REMOVED REPLACED EXTERNAL POWER CONTACTOR K114 PER MM. RPL'D EXTERNAL PWR CONTACTOR, CKS OKAY PER MM TEST. RAN ENGINES TO DUPLICATE DF680, PWR WOULD NOT TRANSFER TO ENG GEN'S & UTILITY BUSSES WOULD NOT COME ON. BPCU SHOWS SIGNS ON BOTH LINES, RESET PWR, BPCU DEAD. RPL'D BUSS PWR CONTROL UNIT REF MM, CKS OK PER MM. ** NEED TO RUN ENGINES TO CONFIRM REF SMC4.