What was found
(CAN) DURING CRUISE AT FL430, A SUDDEN AND STRONG VIBRATION WAS FELT AND THE MASTER CAUTION CAME ON INDICATING LT ENGINE VIBRATION. THE WAS ACCOMPANIED BY A RAPID RISE IN OIL PRESSURE. THE ENGINE POWER WAS RETARDED, VIBRATIONS LEVEL REDUCED BY THE OIL PRESSURE KEPT SLOWLY RISING. THE FLIGHT WAS DIVERTED AND THE ACFT LANDED SAFELY. POST FLIGHT INSPECTION FOUND METAL IN THE MAIN OIL FILTER.