Incident Overview
On an undisclosed date, at 1708:48, while cruising at 6,000 feet, the pilot of aircraft N711Y informed air traffic control of a problem and requested to turn toward Texarkana. A vector was provided and the nearest airports were advised. Shortly thereafter, the pilot stated he would be unable to reach any airport.
Flight Events
At 1711:49, the pilot reported smoke in the cockpit. The crew had been unable to start the cabin heater despite repeated attempts by the captain. Subsequently, smoke entered the cabin. Fresh air vents and cockpit windows were opened, but the smoke became dense, impairing the crew's vision. The oxygen system and hand-held fire extinguishers were not used.
Forced Landing and Impact
At approximately 1714, the aircraft attempted a forced landing in a field. During the landing, it hit wires and a pole, then continued into trees, where it was extensively damaged by impact and subsequent fire. The crew egressed through the cockpit windows. The passengers did not escape.
Investigation Findings
Examination indicated the fire originated in the aft cabin area on the right-hand side, at or near the floor line. The ignition and fuel sources were not determined. Fasteners for the heater door were found unfastened. Among those killed were American singer and actor Ricky Nelson, his girlfriend Helen Blair, and five members of his band 'Stone Canyon'.
Probable Cause
The official probable cause was not explicitly determined for the fire, but the investigation listed multiple occurrences and findings:
- Occurrence #1: fire during cruise; findings included fuselage and cabin fire, undetermined reason, smoke in cabin and crew compartment, emergency procedures not followed, checklist not used, oxygen system not used.
- Occurrence #2: forced landing during descent/emergency.
- Occurrence #3: in-flight collision with object during landing flare/touchdown; findings included contact with wires and utility pole.
- Occurrence #4: on-ground collision with object during landing roll; finding included trees.