Accident Narrative
The pilot, who held a private pilot certificate with an instrument rating, obtained a full weather briefing before departing on a long cross-country flight. The destination airport was forecast to be under visual meteorological conditions, but an AIRMET and Center Weather Advisory (CWA) had been issued for low instrument flight rules (IFR) conditions later that day. The briefer advised the pilot to check the weather again en route.
When the pilot stopped for fuel, another CWA was issued for low IFR conditions at the destination; however, no records indicate that the pilot obtained this information during the fuel stop or after departing on the last leg of the flight. About 10 minutes before arriving at the airport, the pilot reported that he had obtained the current weather conditions at his destination. The most recent observation, about 1 hour before the accident, indicated good visibility, but the weather reporting equipment did not provide ceiling heights. It is unknown whether the pilot obtained weather information from nearby airports, which were reporting low instrument meteorological conditions (visibility between 1/4 and 1/2 mile and ceilings 200–300 ft above ground level). Additionally, three pilot reports (PIREPs) describing poor weather conditions were filed within the hour before the accident. The controller did not relay the PIREPs or the CWA information to the pilot, so the pilot was likely unaware of the deteriorating conditions.
Flight Path and Impact
Based on radar information and witness statements, the pilot's approach to the airport was unstabilized. He descended below the minimum descent altitude of 440 ft, and after breaking through the fog at about 100 ft agl, the airplane reentered the fog and completed a 360° right turn near the approach end of the runway, during which its altitude varied from 100 ft to 300 ft. The airplane then climbed to an altitude about 800 ft before radar contact was lost near the accident site.
The airplane came to rest inverted, consistent with one witness's statement that it descended through the clouds in a spin before impact. Postaccident examination revealed no preimpact anomalies with the airplane or engine that would have precluded normal operation.
Pilot Experience and Circumstances
Although the pilot was instrument rated, his recent instrument experience could not be established. The circumstances of the accident, including the restricted visibility conditions and the pilot's maneuvering before impact, are consistent with a spatial disorientation event.
Probable Cause
The pilot's loss of airplane control due to spatial disorientation, which resulted in the exceedance of the airplane's critical angle of attack and an aerodynamic stall/spin. Contributing to the accident was the pilot's failure to fly a stabilized approach consistent with the published instrument approach procedure.