1989-01-04: Cessna 172 (N96319) — Denver Air Center — Longmont, CO

Casualties unknownLongmont, CO, US

A student pilot's aircraft veered left upon landing and struck a snowdrift on runway 29, resulting in a nose-over incident under calm wind conditions.

What happened

The student pilot was conducting a landing operation on Runway 29, which measured 4,200 feet in length and 60 feet in width. The weather conditions at the time of the event were characterized by calm winds, providing no crosswind component to influence the aircraft's trajectory laterally.

During the final phase of the landing roll, the aircraft began to veer unexpectedly to the left side of the runway. This deviation led the aircraft directly into a snowdrift located on the pavement. The impact with the accumulated snow caused the nose gear to collapse, resulting in the aircraft nosing over onto its fuselage.

Post-incident observations indicated that approximately 6 to 8 feet of the runway width along the edges remained covered with snow. The pilot noted that the presence of these snowdrifts was a significant factor in the severity of the outcome. He suggested that if the airport maintenance crews had plowed the full width of the runway more thoroughly, the accident might have been avoided.

Probable cause

The pilot's failure to maintain directional control during landing while encountering a snowdrift on the runway surface.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X27569. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.