What was found
ON DESCENT, NR 2 ENGINE TORQUE BEGAN TO FALL AND THE NR 2 ENGINE OIL PRESSURE WARNING LIGHT CAME ON. THE ENGINE WAS SECURED. THE ODOR OF OIL SMOKE WAS IN THE CABIN. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE VERIFIED A LACK OF ENGINE OIL ON THE DIP STICK (6 QUARTS LOW), METAL IN THE ENGINE OIL SCREEN, OIL RUNNING OUT OF THE ENGINE INTAKE AND UNUSUAL NOISE WHEN TURNING THE PROPELLER. THE ENGINE IS TO BE REPLACED.