Overview
A non-instrument rated private pilot departed in instrument meteorological conditions (IMC) during nighttime hours. The flight ended approximately nine minutes later when the aircraft impacted terrain. Witnesses observed the aircraft in a steep dive and on fire prior to the collision with the ground.
Investigation Findings
Examination of the wreckage revealed extensive fire damage to the interior cabin. Investigators found no evidence of an insulation grommet at the frame penetration point of the main wiring harness, and cable insulation was absent from that location to the battery. The battery box exhibited bulging on all sides and was blackened and charred. The wing spar web was melted and missing from the area where the electric fuel pump attaches to the spar, extending to the right side wing attach point.
Maintenance Records
Review of maintenance logs indicated that aluminum wiring had been replaced during the last annual inspection on April 29, 1989. A logbook entry dated November 18, 1989, noted: "BAD GAS SMELL!"
Conclusion
The investigation did not state a probable cause for the accident.