Incident Overview
A private pilot who was not instrument-rated attempted to conduct an IFR flight. According to witnesses, a cloud layer existed in the area, beginning at approximately 5,000 feet MSL, and visibility was restricted due to haze. The pilot reported difficulty maintaining a level attitude during the flight.
Radar and Witness Observations
Radar data indicated that the airplane made several erratic climbs and descents, starting at about 6,200 feet and continuing until radar contact was lost. Witnesses in the accident area stated that, after the airplane broke out of the cloud layer, it performed several erratic climbs and descents.
Post-Accident Examination
Following the event, examination of the aircraft revealed that the stabilator trim was found in the full nose-up position.
Analysis
The available information suggests that a non-instrument rated pilot executed an IFR flight in conditions of reduced visibility and a cloud layer. The pilot's reported difficulty with attitude control, combined with observed erratic altitude changes and the stabilator trim's full nose-up setting, are documented facts. No determination of cause is provided in the source material.