What was found
(CAN) LOW OIL PRESSURE/IFSD DURING DESCENT PASSING THROUGH FL70, THE LOW OIL PRESSURE WARNING CAME ON. THE PILOT ELECTED TO SHUT THE ENGINE DOWN BEFORE MAKING AN UNEVENTFUL LANDING AT DESTINATION. GROUND INSPECTION FOUND OIL LEAKING FROM THE ENGINE COWLING AS A RESULT OF A DAMAGED ACCESSORY DRIVE LIP SEAL. THE SEAL WAS REPLACED AND THE A/C RETURNED TO SERVICE.