As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CUSTOMER COMPLAINED OF ROUGH RUNNING ENGINE DURING SHORT FINAL UPON LANDING. FOUND SPINNER BULKHEAD TO BE CRACKED APPROXIMATELY 95 PERCENT AROUND ATTACHMENT TO CRANKSHAFT. FURTHER INSPECTION FOUND THE SPINNER BULKHEAD STABILIZER MISSING FROM PROELLER HUB INSIDE SPINNER. BULKHEAD STABIIZER PN 0550340-1.