As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THERE ARE 4 AREAS THAT SUBMITTER IS INVESTIGATING. A. A MATERIAL FAILURE OF THE NR 1 BEARING. B. ELECTRICAL DISCHARGE DUE TO THE MAGNETISM ON THE STARTER DRIVE GEAR. C. PLASTIC BEAD MATERIAL. D. THE FIT OF THE NR 1 BEARING ONTO THE REAR STUB SHAFT. FOUND NR 1 BEARING FRACTURED.