On May 21, 1994, a Ryan NAVION L-17B (registration N1669Z) was involved in an aviation accident near Olympia, WA. Investigators recorded the probable cause as: AN INFLIGHT FIRE FOR AN UNDETERMINED REASON. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During a downwind departure climb, a Navion pilot declared an emergency and initiated a descending turn. Witnesses observed an intense cabin fire. The aircraft crashed in a steep descent and was demolished.
Accident Overview
While climbing during a downwind departure, the pilot of the Navion declared an emergency and began a descending turn back toward the airfield. Shortly after the turn was initiated, witnesses noted an intense fire in the cabin of the aircraft. The airplane subsequently crashed in a steep, left wing low, nose down attitude. The impact and subsequent fire demolished the aircraft.
Witness Observations
Witnesses reported seeing an intense fire within the cabin after the pilot initiated the descending turn. The fire and smoke were of such intensity that the pilot was unable to maintain control of the aircraft, according to evidence from the investigation.
Investigation Findings
The specific source of the fire was not determined. The investigation concluded that the fire and smoke had overpowered the pilot, leading to a loss of control. No other causal factors were identified.