As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AT INSPECTION OIL LEAKAGE WAS OBSERVED FROM RIGHT ENGINE. AFTER CLEAN UP AND FURTHER INVESTIGATION A 1.25 FT CRACK WAS FOUND STARTING AT A CRANK CASE SEAM BOLT CLOSE TO THE STARTER AREA. AIRCRAFT WAS GROUNDED AND AN OVERHAULED ENGINE INSTALLED.