As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LEFT ENGINE APPARENTLY EXPERIENCED A FAILURE OF THE NR 6 CYLINDER PISTON CONNECTING ROD DURING NORMAL FLIGHT CONDITIONS. THE PILOT RETURNED TO THE AIRPORT WITHOUT FURTHER INCIDENT. THE ENGINE WAS SHUT DOWN WHEN THE OIL PRESSURE DROPPED RAPIDLY. ENGINE TOTAL TIME WAS APPROXIMATELY 985.0 HOURS. THIS IS A FACTORY RE-MANUFACTURED ENGINE.