What was found
(CAN) DURING CRUISE AT 13,000 FEET, THE CREW NOTICED A REDUCTION IN MANIFOLD PRESSURE ON NR 2 ENGINE THAT COULD NOT BE REGAINED WITH THE THROTTLE. THE AIRCRAFT DIVERTED AND LANDED WITHOUT INCIDENT. POST-FLIGHT INSPECTION FOUND THE TURBOCHARGER ROTATING GROUP WAS DRAGGING AND PREVENTING PROPER TURBO OPERATION. THE TURBOCHARGER WAS REPLACED. THE ENGINE GROUND RUN SERVICEABLE AND THE AIRCRAFT RETURNED TO SERVICE.