As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT HEARD RIGHT ENGINE RUNNING ROUGH AND SAW THE OIL PRESSURE DROP. SHUT THE ENGINE DOWN AND MADE A SAFE LANDING AT OUZINKIE AIR STRIP. UPON INSPECTION FOUND A CRACK IN THE CRANKCASE BETWEEN THE NR 3 AND NR 5 CYLINDERS. A NEW ENGINE WAS INSTALLED. AFTER REPAIRS THE AIRCRAFT WAS RETURNED TO SERVICE.