What was found
ACFT RETURNED TO FIELD DUE TO NR 1 GEN PROBLEMS. ON CLIMB, FLIGHT REPORTED LOSS OF NR 1 GEN BUS & SUSTAINED LOSS OF CAPTAINS INSTRUMENTS: BOTH CAPT'S EFIS DISPLAYS WENT BLANK, NR 1 GEN BUS OFF LIGHT ILLUM, NR 1 TRANSFER BUS OFF LIGHT ILLUM AND C819 NR 1 TRANSFER BUS NORMAL C/B POPPED. *S/D* MX PERSONNEL COULD NOT DUPLICATE ON THE GROUND. THE FOLLOWING WAS REPLACED: R349 NR 1 TRANSFER BUS CONTROL RELAY, R350 NR 2 TRANSFER BUS CONTROL RELAY, 801 NR 1 GEN POWER CIRCUIT BREAKER, C819 NR 1 TRANSFER BUS NORMAL BREAKER, P5-4 CONTROL MODULE, AND T4 CURRENT TRANSFORMER. WIRING WAS ALSO CHECKED BETWEEN C819 AND R3 N R1 TRANSFER RELAY, C820 NR 1 TRANSFER BUS ALTERNATE BREAKER AND R3, AND AT THE T212J TERMINAL STRIP.