As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHEN PILOT TRIED TO START ENGINE THERE WAS NO N1 INDICATION. STARTER GENERATOR COULD BE HEARD RUNNING. WHEN STARTER/GENERATRO WAS REMOVED, DIRVE SHAFT WAS FOUND SHEARED AT NECK. SPLINED END WAS REMOVED FROM ENGINE GEARBOX. REPLACEMENT STARTER GENERATOR WAS INSTALLED AND ENGINE STARTED NORMALLY.