What happened
The aircraft was engaged in flight operations when the pilot encountered significant weather challenges, specifically freezing rain that resulted in a buildup of ice on the windshield. Due to this impairment of visibility and control, the pilot initiated a precautionary landing at Northome, Minnesota. This decision was made without prior planning; the airport had not been part of the original departure plan.
Upon arrival at Northome, the pilot faced additional complications. The facility lacked a UNICOM frequency for communication assistance. Furthermore, Notices to Airmen (NOTAMs) explicitly indicated that the runway was closed. Despite these warnings and the adverse weather conditions, which included an overcast sky and freezing rain, the pilot proceeded with the landing attempt. During the final phase of the approach, the aircraft collided with a snowbank located on or near the airport grounds.
The investigation
Examination of the event revealed that the primary driver for the landing was the accumulation of ice on the windshield, which necessitated an immediate precautionary measure. The lack of prior planning for this specific airport meant the pilot was unfamiliar with the local status updates. The presence of NOTAMs advising that the runway was closed was a critical piece of information that was either overlooked or deemed secondary to the immediate need to land due to ice accumulation.
Findings
The sequence of events highlights several contributing factors. First, the ice buildup on the windshield created an urgent need for landing that overrode standard planning protocols. Second, the pilot had not intended to land at Northome, leading to a lack of situational awareness regarding the airport's operational status. Third, the runway was officially closed, as advised by NOTAMs, and there was no UNICOM available to clarify conditions on the ground. The VMC weather with freezing rain contributed to the ice accumulation but did not preclude visual flight rules operations initially.
The collision with the snowbank occurred because the aircraft landed at a facility that was not prepared for traffic and had closed runways. The pilot's decision to land was driven by the immediate hazard of windshield icing, but the failure to account for the closed runway status resulted in the impact.