Cessna 208B N454SF accident near Bethel, Alaska

Probable cause

The pilot's selection of unsuitable terrain for landing. Contributing to the accident were snow-covered terrain, blowing snow and flat lighting conditions.

NTSB analysis

The airline transport pilot was planning to land on an asphalt runway that had localized drifting and blowing snow. Instead, the airplane touched down in a snow-covered area of the airport between the runway and the adjacent taxiway. The pilot said that blowing snow and flat lighting conditions contributed to his difficulty in discerning the correct location of the runway. He said he "aimed for the darker area between the runway and the taxiway, believing this was the runway." The director of operations for the operator said that the depression between the runway and the taxiway had been filled with snow by runway maintenance personnel during snow removal operations. He indicated that the area had the illusion of a hard surface, but landing during reduced visibility due to blowing snow required the pilot to take advantage of any and all available resources, such as requesting the activation of the runway lights, and/or using the instrument landing system (ILS) localizer as a means of aligning the airplane with the centerline of the runway.

Text from the NTSB. Open the NTSB docket for ANC08LA031 for the full record.