As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS AT CRUISE POWER SETTING. THE PILOT EXPERIENCED A ROUGH RUNNING ENGINE. HE SECURED THE ENGINE AND CONTINUED TO LAND WITHOUT FURTHER INCIDENT. UPON INSPECTION OF THE ENGINE, DETERMINED THE CONNECTING ROD BOLT FAILED ON THE NR 5 CYLINDER AND THE CYLINDER WAS FORCED OFF ITS PAD CAUSING EXTERNAL DAMAGE TO THE ENGINE.