QUINCY, FL, USA
N40FL
Navion A
The airplane was on a test flight after completion of an annual inspection. The pilot stated that shortly after takeoff, he first smelled an electrical fire, then felt heat on his legs. He remained in the pattern and landed. After exiting the airplane, a fire erupted in the cockpit area. Bystanders used water to help extinguish the fire. Postaccident examination of the airplane revealed electrical arching on the firewall from a cable that went through the firewall. The electrical cable was routed from the battery relay (aft of the aft seat) to the starter relay, which was on the upper right section of the firewall. The mechanic, who performed the inspection, used the manufacturers checklist. Reportedly, no work had been performed on the instrument panel.
On April 10, 1997, about 1426 eastern daylight time, a Navion A, N40FL, registered to Piggy Bank Motors Company, was substantially damaged by fire after landing at the Quincy Municipal Airport, Quincy, Florida. Visual meteorological conditions prevailed at the time and no flight plan was filed for the maintenance test flight. The private-rated pilot, the sole occupant, was not injured. The flight originated about 5 minutes earlier. The pilot stated to an FAA inspector that he intended to remain in the traffic pattern after takeoff and while on final approach, he smelled what he thought was an electrical fire and felt heat by his legs. He landed and after stopping the airplane, fire erupted in the cockpit. He then exited the airplane and bystanders extinguished the fire using water. According to the FAA inspector, the airplane had been to the facility for an annual inspection and reportedly no work was performed to the instrument panel. The mechanic who performed the annual inspection reported using the airplane manufacturers checklist. The mechanic also stated that postaccident examination of the airplane revealed electrical arching at the firewall where the electrical cable from the battery relay to the starter relay transits through. The battery in the airplane is located aft of the aft seat on the left side of the airplane.
chafing of an electrical cable that was routed through the firewall, which resulted in electrical arching and an in-flight fire.
Source: NTSB Aviation Accident Database
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