As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
10 MILES FROM LANDING, PILOT REPORTED RT ENG ROUGH AFTER TROUBLESHOOTING WITH MAG, FUEL AND PUMPS. NOTICED OIL FROM ACCESS DOOR. ENGINE WAS FEATHERED AND SECURED. MX FOUND CRACKED CASE STARTING AT NR 5 CYLINDER. TOP FWD BASE STUD TO FLOW DIVIDER. (THIS IS 2ND ENG IN THE FLEET WITH SAME LOCATION & PROBLEM.