What was found
(CAN) THE ACFT EXPERIENCED ENGINE NR 2 VIBRATION DURING THE DESCENT, THAT EVENTUALLY BECAME HEAVY WITH OIL ODOR AND SOME SMOKE IN THE CABIN. SEVERAL ALARMS THEN WENT OFF AND ACFT ENTERED A DIVE REACHING OVERSPEED. THE PILOT TOOK MANUAL CONTROL, IN VFR, DECLARED EMERGENCY AND PERFORMED AN UNEVENTFUL LANDING. THE PILOT SHUT DOWN ENG NR 2 DURING TAXI. THE PRELIMINARY INSPECTION SHOWED THE FOLLOWING: 1- PROP BLADE, 5 IN FEATHER POSITION. PROP BLADE, 2 IN REVERSE. PROP BLADES 1, 3, 4 AND 6 ARE UNFEATHERED INVESTIGATION ON-GOING.