As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) STARTER GENERATOR WAS REMOVED FOR OVERHAUL, AT 1786 HRS TTAF ON 21 FEB 2012. DURING OVERHAUL, FOUND A CRACK RADIALLY AND LONGITUDINALLY IN THE DRIVE SPLINE THAT ENGAGES WITH THE ENGINE. THE STARTER GENERATOR WAS MFG IN MARCH 2006. THE CRACKED SHAFT WAS REPLACED WITH A NEW ONE. CRACKED SHAFT RETURNED TO THE OPERATOR.