As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 4 ENGINE STARTED RUNNING ROUGH IN CRUISE. MANIFOLD PRESSURE BEGAN TO INDICATE HIGH AND FLUCTUATING. ENGINE SHUT DOWN AND LANDED WITH NO FURTHER PROBLEMS. INTERNAL FAILURE, METAL IN SCREEN. ENGINE SENT TO REPAIR STATION FOR TEAR-DOWN AND EVALUATION.