What was found
SHAFT SHEARED ON GENERATOR WITH RELATIVITY LOW TIME SINCE OVERHAUL. SHAFT SHEARED .5000 INCH FROM DRIVE SPLINE, SLIGHT CORROSION CAN BE SEEN AT FAILURE POINT. PERHAPS A MORE THOROUGH NDI DURING THE LAST OVERHAUL COULD HAVE FOUND THIS DEFECT. THE GENERATOR WAS SENT OUT FOR REPAIRS, THE SHAFT WAS REPLACED, NO OTHER DEFECTS WERE NOTED AND IT IS BACK IN SERVICE. NORMAL SCHEDULED MAINTENANCE ON THESE GENERATORS IS, 1050 HOURS TSO A BEARING CHANGE IS REQUIRED, AND AT 2000 HOURS TSO, OVERHAUL IS REQUIRED. (W)