As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON INSP OF THE ENGINE DURING CONDITION INSPECTION, A VERY LIGHT AMOUNT OF OIL SEEPAGE WAS OBSERVED ON THE ENGINE CRANKCASE NEAR THE NR 2 CYLINDER STUD. CLOSER INSP WITH DYE PENETRANT REVEALED A HAIRLINE CRACK EMENATING FROM THE TOP LT THROUGHBOLT ON THE NR 2 CYLINDER. ENGINE WAS REMOVED FOR CRANKCASE REPAIR. CRANKCASE WAS REPAIRED SUCCESSFULLY.