What was found
DURING CRUISE FLIGHT LOST OIL PRESSURE INDICATION, MADE A PRECAUTIONARY LANDING ON A SNOW COVERED REMOTE RUNWAY, AIRCRAFT NOSED DOWN AND HAD A PROP STRIKE, BENDING BLADES. THE MECHANIC REMOVED THE ENGINE, DISCOVERED THE LOWER VACUUM PUMP GASKET WAS BLOWN OUT. THIS BLOWN GASKET ALLOWED OIL TO BE PUMPED OUT PAST THE DRIVE ASSEMBLY INTO THE LOWER COWL. LOSS OF OIL CAUSED NO OIL PRESSURE CONDITION. NOTE: A ONE TIME INSPECTION OF THE LOWER VACUUM PUMP INSTALLATION 1) PROPER GASKET 2) PROPER NUT TORQUE.