What was found
(CAN) PILOT REPORT CAS MSG APPEARED, GEN 1 OFF, WHILE IN CRUISE. UNSUCCESSFUL RESET ATTEMPT, 25 MINUTES LATER COULD HEAR A FAINT GROWL & FEEL A SLIGHT VIBRATION. SCHEDULED LANDING PERFORMED. NR 1 GEN WAS REMOVED, AFT BALL BEARING HAD FAILED, COOLING FAN WAS WORN & DETACHED FROM SHAFT. PIECES OF BEARING CAGE WERE FOUND UPON REMOVING BRUSH COVER. APPLICABLE INSPECTIONS PERFORMED, GEN REPLACED WITH OVER HAULED UNIT.