What was found
(CAN) ON APPROACH THE ENGINE EXPERIENCED AN UNCOMMANDED POWER (TORQUE) REDUCTION ACCOMPANIED BY A LOUD NOISE AND LOSS OF ENGINE OIL PRESSURE. THE CREW SECURED THE ENGINE IN FLIGHT AND ACCOMPLISHED A SINGLE-ENGINE LANDING. SUBSEQUENT INSPECTION REVEALED DAMAGE TO THE TURBO MACHINE. MFG WILL MONITOR THE INVESTIGATION OF THIS EVENT AND WILL ADVISE OF ROOT CAUSE ONCE DETERMINED.