Background
Before departure, the pilot, who was not instrument-rated, received a weather briefing. The briefing advised that instrument flight rules (IFR) conditions were forecast along the entire route of the proposed flight. The pilot filed an IFR flight plan and, before departing from the uncontrolled airport, obtained an IFR clearance.
Flight Details
The flight departed under a reported 500-foot ceiling at a nearby airport. After departure, the airplane climbed to about 3,300 feet. Radar data showed that the airplane deviated from its assigned heading and its altitude began decreasing. Subsequently, the airplane collided with trees and then the ground in a nose-low attitude.
Post-Crash Examination
The cockpit and cabin were extensively damaged by impact and a postcrash fire. Examination revealed no preimpact failure or malfunction of the airframe, engine, or vacuum pump. An alternate vacuum system had been installed. Examination of components of the autopilot system showed no indication that it had been engaged.