What happened
During a night flight in worsening weather, an instrument-rated private pilot was performing a non-precision instrument approach. GPS tracking data shows that while the pilot followed the published approach procedure initially, the aircraft descended below the minimum altitude required at the missed approach point. Following this descent, the pilot initiated a climbing right turn that deviated from the established missed approach instructions.
Subsequent flight path data recorded a series of ascending and descending turns to various altitudes. In the final moments of recorded data, the aircraft entered a descending left turn. Witnesses at the scene reported hearing the aircraft passing at a low altitude and noted foggy conditions. Meteorological reports from a nearby airfield, recorded approximately 26 minutes prior to the event, indicated visibility of less than 2 miles in mist with an overcast ceiling of only 300 feet.
Findings
An inspection of the engine and airframe following the accident showed no signs of mechanical failure or malfunctions that would have prevented the aircraft from operating normally. The flight path recorded by GPS, characterized by erratic maneuvering in night instrument meteorological conditions, is consistent with the pilot experiencing a loss of control due to spatial disorientation. This type of disorientation is a known risk during low-visibility operations when sensory inputs from the inner ear and muscles conflict with visual cues.