Lewistown

The flight crew reported that, the instrument approach was flown on autopilot to about 700 ft above ground level until the runway was visually in sight. They were 300 ft off the runway centerline, and 1 nautical mile from the runway threshold. The visual glideslope indicator was inoperative, and the runway markings were obscured due to dry light snow. The airplane subsequently landed hard on the unusable portion of the runway, about 800 ft short of the landing threshold, and the left mail landing gear tire blew, causing the propeller to strike the runway. The airplane veered off the runway substantially damaging the left wing. The pilots reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Prior to departure, the pilot was informed that it had been raining; the roads were wet, but no mention of ice at his destination. During the approach to the destination airport, the runway appeared "wet", and a normal approach and landing was attempted. The airplane touched down at 110 knots, the pilot "then deployed lift dump and [then applied the] brakes". Unable to get braking action, the pilot tried to slide the airplane "left and right" to get traction, but could not. The airplane departed the south end of the 4,370-foot-long runway, went over the edge of an embankment and stopped next to a levee. There were no reported pre-impact malfunctions with the airplane. The Manufacturer Approved Airplane Flight Manual Supplement for Airplanes Operating on Wet and contaminated Runways; General Information Section, states operations on runways contaminated with ice or wet ice are not recommended and no operational information is provided. Using the supplement, the anticipated landing distance on a wet runway was calculated to be about 3,400 feet, the anticipated landing distance on an uncontaminated runway was calculated to be approximately 2,800 feet, and the prescribed landing speed (Vref) was determined to be about 111 knots. A braking action (runway condition) report for the private airfield's runway did not exist, nor was one required.

During taxi to takeoff the brakes failed. The pilot attempted to ground loop the aircraft. The aircraft rolled down a hill and collided with a gully. The pilot was fatally injured. During preflight the copilot inadvertently added hydraulic fluid in the alcohol tank. The hydraulic pump cavitated. The pilot failed to use the hydraulic emergency hand pump or the a.c. Electric pump.