Incident Overview
A pilot performing an instrument approach to runway 17 reported his position on the common traffic advisory frequency (CTAF) at 20 miles north, 10 miles north, and on a three-mile final. Approximately two miles from the approach end of the runway, the pilot observed a snow plow on the northern end of the runway moving further north. The pilot maneuvered the airplane laterally to avoid overflying the snow plow and selected a touchdown point 1,000 feet beyond the plow.
Sequence of Events
During the landing roll, the left wing contacted a swath of unplowed snow in the middle of the runway, resulting in substantial damage to the airplane. The snow plow driver was carrying a Unicom radio but did not hear the pilot's position reports. The pilot had reported his position three times during the approach.
Post-Accident Observations
Photographs taken immediately after the accident illustrate a swath of unplowed snow in the middle of the runway. No NOTAMs (Notices to Airmen) had been issued for snow removal activity or runway conditions. An examination of the airplane's systems revealed no anomalies that could have contributed to the accident.
Findings
The pilot successfully maneuvered to avoid the snow plow but subsequently struck unplowed snow during the landing roll. The lack of communication between the pilot and the snow plow driver, combined with the absence of NOTAMs regarding runway conditions, were noted. No mechanical issues were found with the airplane.