As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A 5-6 IN CRACK DEVELOPED IN CRANKCASE HALF JUST FWD OF THE NR 6 CYL BETWEEN THE OIL DIPSTICK AND THE TOP LT THRU BOLT ON THE NR 6 CYL. OIL WAS DISCOVERED IN THAT AREA AND THE ENG WAS WASHED AND CLEANED AND THEN DYE PENETRANT WAS SPRAYED AND THE CRACK WAS DISCOVERED. THE ENG WAS REMOVED FROM ACFT AND RETURNED TO OVERHAUL SHOP FOR SERVICING.