Incident Overview
The pilot of an airplane conducted a low pass over a closed runway covered with snow. The maneuver was intended to assess whether a precautionary landing was possible, prompted by what the pilot described as 'unusual engine roughness.' During the low pass, the airplane unexpectedly settled onto the snow-covered runway.
Pilot's Account
The pilot attributed the unintended landing to the 'featureless condition of the snow covered runway and a gradual rise in ground elevation,' which he said caused decreased depth perception. Once on the ground, the snow cover caused a rapid deceleration of the aircraft's speed. The airplane then touched down near midfield, traveled approximately 30 yards, and nosed over upon coming to a stop.
Official Observations
An FAA inspector who examined the scene reported that there was approximately one foot of snow on the runway. The inspector also noted that after touchdown, the aircraft traveled about 30 yards before stopping. No discrepancies were identified with the engine or airframe.
Runway Condition
The runway was closed at the time of the incident and was entirely snow-covered. The snow cover contributed to the aircraft's rapid deceleration once it contacted the surface.