As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE WAS 438 HOURS FROM FACTORY REMANUFACTURE. REMOVED LONER PLUG FROM NR 3 CYLINDER AND FOUND CYLINDER HAD EXCESSIVE OIL IN PLUG. REMOVED CYLINDER AND FOUND THE OIL CONTROL RING LAND AND PISTON PIN HOLE WERE EXCESSIVELY PITTED AND CORRODED. ENGINE WAS REPORTED AS NEEDING TO 'CLEAR ITS THROAT' BEFORE IT WOULD RUN SMOOTH.