What was found
EICAS MSG R GEN OFF DISPLAYED. GEN OFF LIGHT ILLUM & FAILED TO RESET. REPLACED IDG. SERVICED IDG TO FULL. ACCOMPLISHED OPS CHECK, FREQ AND VOLTS OKAY. FOUND FWD UPPER CONNECTOR, IDG SIDE CONTAMINATED WITH CARBON BUILD UP PIN TO PIN. REMOVED CARBON AND FLUSHED CONN. RAN ENGINE SEVERAL TIMES, LOADED AND UNLOADED AND SWITCHED POWER BACK AND FORTH, NO FAULTS. FOUND RIGHT BUS TIE BREAKER (C904) IN THE CLOSED POSITION, RPL REF MM24-22-03. FEEDER CABLES FROM IDG TO C903 RANG OUT GOOD, NO SHORT TO GRD. RPL C903 R GEN CB AND GCU (PRECAUTIONARY). RAN ENG FOR 15 MIN, NO FAULTS. BPCU BITE AFTER RUN WAS GOOD.