As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CRANKSHAFT BROKE IN FLIGHT. CONTINUED TO RUN BUT PILOT REPORTED KNOCKING NOISE IN ENGINE AND LANDED. ENGINE WAS REMOVED FROM AIRCRAFT AND SHIPPED TO SHOP FOR PARTIAL TEAR DOWN. FOUND METAL IN OIL SUMP AND A CRACK IN COUNTERBALANCE SECTION OF CRANKSHAFT.