Incident Overview
At an altitude of 15,500 feet and approximately 30 miles from the departure airport, the pilot and passenger noticed fumes that caused eye irritation, dizziness, and breathing difficulties. The pilot reversed course and elected to make an emergency landing on a dirt road.
Emergency Landing and Evacuation
During the landing roll-out, the left wing struck one or more metal posts. After the aircraft came to a stop, the pilot and passenger evacuated through the pilot's door. At that time, flames were observed emanating from the aft portion of the left wing, and the left main tire and wheel were burning. The fire had self-extinguished prior to the arrival of emergency equipment.
Post-Accident Examination
Examination of the aircraft revealed several burned electrical wires under the lower left instrument panel. The burned wires were connected to the strobe light, surface de-icer, and windshield heat or prop de-ice switches, as well as three unused wires. Additionally, a dent with chordwise gashes was found on the left wing, surrounded by fuel stains.
Investigation Findings
The source of the in-flight electrical fire was not determined. No direct relationship was found between the burned wiring in the cockpit and the fire observed on the left wing and landing gear.