As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A SLIGHT OIL LEAK COMING FROM THE FRONT RIGHT SECTION OF THE ENGINE WAS FOUND TO BE A CRACKED CASE. REMOVED NR 1 ALTERNATOR AND DYE CHECKED THE AREA. FOUND A 6 INCH CRACK ON THE ALTERNATOR MOUNTING FLANGE STARTING ON THE ALTERNATOR MOUNTING FLANGE THROUGH BOLT. THIS ENGINE WAS REPLACED.