As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) LOSS OF MANIFOLD PRESSURE AND ENGINE VIBRATION ON NR 1 ENGINE NECESSITATED ENGINE SHUTDOWN IN FLIGHT. POST FLIGHT INSPECTION FOUND THE NR 3 CYLINDER HOLD DOWN STUDS (P/NS 38-13 & 50-15) AND THROUGH BOLTS WERE PULLED FROM THE CRANKCASE, CAUSING SEPARATION OF THE NR 3 CYLINDER FROM THE CRANKCASE. THE ENGINE WAS REMOVED AND AN OVERHAULED ENGINE WAS INSTALLED.