What was found
(CAN) WHILE CLIMBING AT FL21, THE PILOT WAS FORCED TO SHUTDOWN THE LT ENGINE AFTER NOTICING THE OIL PRESSURE HAD SUDDENLY DROPPED TO ZERO. AT THE SAME TIME A LOUD POPPING SOUND WAS HEARD AND THE CABIN STARTED FILLING WITH WHITE SMOKE. THE ACFT LANDED WITHOUT INCIDENT. THE TROUBLESHOOTING REVEALED THAT OIL COVERED THE REAR ENGINE NACELLE AND WING T/E, A LARGE AMOUNT OF OIL WAS FOUND IN THE ENGINE INTAKE AREA AND ENGINE BLEED VALVE, THERE WAS NO INDICATION OF OIL ON THE DIPSTICK.