As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT HAS SEVERAL OIL LEAKS ON RT ENGINE FINALLY RESULTING IN CRACKED CASE. SUSPECT THAT WHEN TEAR DOWN IS DONE, CRANK HAS COUNTERWEIGHT PROBLEM. THIS IS THE THIRD ENGINE THIS YEAR TO REJECT DUE TO CRANK PROBLEMS. SUBMITTER STATED MAYBE ENGINE OVERHAUL SHOULD REQUIRE CLOSER CRANK OVERHAUL INSPECTION FOR BUSHING REPLACMENT, 300 TSO.