As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TWO INCH RADIAL CRACK WAS FOUND DURING ENGINE MAJOR OVERHAUL MAGNAFLUX INSPECTION. CRACKS WERE FOUND BEHIND PROPELLER FLANGE ON THE CRANKSHAFT. ENGINE POSSIBLY HAD A PROPELLER STRIKE AND WAS NOT RECORDED. SUBMITTER STATED ALL PILOTS AND OPERATORS NEED TO REPORT THESE INCIDENTS.