As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING 50 HOUR INSPECTION, AN APPARENT OIL LEAK WAS FOUND ON THE TOP LEFT OF ENGINE CASE. PERFORMED DYE PENETRANT TEST. FOUND CRACK IN CASE ABOVE NR 2 CYLINDER ALONG THE EXHAUST LIFTER BOSS. CRACK WAS APPROXIMATELY 4 INCHES LONG. NO APPARENT REASON FOR DEFECT.