What happened
During a final approach to Armstrong under nighttime conditions, a twin engine aircraft encountered terrain obstacles. The airframe struck tree tops in a wooded area situated approximately one mile short of the runway threshold. Upon impact, the aircraft burst into flames and was completely destroyed. All 12 occupants perished in the incident.
Findings
The event took place in predawn darkness with adverse meteorological conditions present. Weather data indicated an overcast layer at roughly 1,000 feet and visibility limited to about 1.5 miles due to light snowfall. Despite exhaustive independent inquiries conducted by both the operating airline and Canadian government authorities, the specific cause of the accident could not be determined.