As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)AN OIL LEAK ON THE RIGHT HAND ENGINE WAS REPORTED. A SUBSEQUENT INSPECTION REVEALED A CRACK IN THE CRANKCASE APPROXIMATELY 3 1/2" LONG, FORWARD OF THE #5 CYLINDER. THE CAUSE OF THE CRACK IS NOT KNOWN.ENGINE REPLACED AND AIRCRAFT RETURNED TO SERVICE.