As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ALTERNATOR WENT OFF LINE AND WOULD NO LONGER SUPPLY POWER. THE ALTERNATOR WAS REMOVED FOR REPLACEMENT. IT WAS NOTED THAT THE ALTERATOR DID HAVE A NUT INSTALLED ON THE SPLINE DRIVE. THE SPLINE DRIVE WAS NOTED TO BE SHEARED. THE ALTERNATOR WAS RETURNED TO THE MANUFACTURER FOR WARRANTY CONSIDERATION.