What was found
AFTER START, RT DC GENERATOR CAUTION LIGHT ILLUMINATED. GENERATOR RESET IAW QRH ON CLIMB. CAUTION LIGHT ILLUMINATED AGAIN. RT GENERATOR SWITCH SET TO THE OFF POSITION. MAINTENANCE FOUND NR 2 DC GENERATOR HAD INTERNAL FAILURE. DC GENERATOR REPLACED, GROUND RUNS CARRIED OUT WITH NO FAULTS. CHECKED SERVICEABLE. DURING SHOP TEAR DOWN IT WAS NOTED THAT THE FAN SIDE ARMATURE SHAFT BEARING CMM IPC 24-31-01, ITEM 240A HAD FAILED.