As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE STARTER BENDIX GEAR WAS BROKEN IN 3 THREE PLACES. THE STARTER HOLD DOWN BOLTS WERE EITHER BROKEN OR STRETCHED. SINCE THE STARTER AND ALT HAVE A SUPPORTING BRACE BETWEEN THEM, VERY STRONGLY SUSPECT THAT THE STARTER WAS ENGAGED WHILE THE ENGINE WAS RUNNING. THE STARTER SW WAS CHECKED FOR DEFECTS BUT NONE FOUND.