As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ANNUAL INSPECTION, BOTH SPINNER BULKHEADS FOUND CRACKED. FORWARD BULKHEAD SEVERELY CRACKED. CRACKS EMANATED FROM BALANCE WEIGHT INSTALLED BY PERSONS UNKNOWN. COUNTERWEIGHT SHOULD BE MOUNTED TO STARTER RING OR AFT BULKHEAD WHEN POSSIBLE. REPLACED BULKHEAD WITH NEW PART.