What was found
(CAN) IN CRUISE, SMOKE WAS OBSERVED IN THE CABIN AND ENGINE POWER REDUCED UNCOMMANDED. THE ENGINE WAS SHUTDOWN IN FLIGHT AND THE AIRCRAFT DIVERTED TO POINT OF DEPARTURE. SUBSEQUENT INSPECTION REVEALED SEIZURE OF THE ENGINE AND OIL LEAKAGE. MFG WILL MONITOR THE INVESTIGATION OF THE EVENT AND WILL ADVISE OF ROOT CAUSE ONCE ESTABLISHED. (TC NR 20070704015)