What happened
A Northern Thunderbird Air Inc. Beechcraft 1900C, registration C-GCMZ, was conducting a scheduled winter charter flight from Vancouver International Airport to Blue River, British Columbia. The flight, carrying two crew members and one passenger, initially operated under instrument flight rules with an intended diversion to Valemount. As the aircraft approached the Blue River valley, weather conditions were rapidly deteriorating.
During the final stages of the approach to Runway 11, the crew attempted to land under visual flight rules despite visibility and ceilings falling below company operational limits. The approach was unstable; the aircraft was maneuvering, not fully configured, and off the centerline below 500 feet. Upon touchdown on the snow-covered runway, the left main gear drifted into deep snow at the runway edge. This caused the aircraft to veer into a snow bank, resulting in substantial damage. There were no injuries to the occupants and no fire was reported.
The investigation
The investigation focused on the crew's decision-making and the lack of reliable runway information. It was established that the crew relied on verbal information from a travel agent and overheard radio communications rather than contacting the runway maintenance contractor directly. While the company's safety management system had previously identified the need for runway markings at Blue River, this mitigation had not been implemented.
Investigators also examined the flight's approach stability. The lack of runway markings, combined with flat lighting and snow cover, made it difficult for the pilot to maintain the centerline. The investigation found that the crew's attempt to complete landing checks and maneuvers while navigating deteriorating weather contributed to the unstable approach.
Findings
- The pilot continued the approach into weather conditions that were below the company's established visibility and ceiling limits.
- The approach was unstabilized, as the aircraft was not properly configured or on the correct flight path by 500 feet above ground level.
- The crew did not obtain or request up-to-date information regarding the specific condition of the runway surface.
- The absence of runway markings and the presence of snow-covered surfaces made it difficult to identify the runway edges.
- A delay in implementing previously identified safety mitigations allowed the hazardous runway condition to persist.