Casualties unknown

1987-04-11: Cessna 170A (N5579C) — Michel L. Whitesell — Durango, CO

Durango, CO, US

On April 11, 1987, a Cessna 170A (registration N5579C) operated by Michel L. Whitesell was involved in an aviation accident near Durango, CO. Investigators recorded the probable cause as: The pilot's failure to maintain directional control during rollout due to a wind shift and gusts, which resulted in the aircraft departing the runway. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 1781061362Data APIEditorial standards

During a landing with a right-quartering headwind, a sudden shift to a right-quartering tailwind with strong gusts lifted the aircraft's tail and right wing. The plane veered off the runway, struck a ditch, and sustained damage after the left main landing gear collapsed.

What happened

The pilot reported that he was conducting a landing operation toward the south when encountering a right-quartering headwind of approximately 20 knots. During the rollout phase on the runway, the wind conditions changed abruptly, shifting to a right-quartering tailwind accompanied by significant gusts. These gusts caused the aircraft's tail and right wing to lift off the ground momentarily. As a result, the aircraft departed from the right side of the runway.

After leaving the paved surface, the aircraft encountered a ditch. This impact resulted in the separation of the left main landing gear. The collapse of this gear led to further damage affecting the left wing structure.

The investigation

The investigation focused on the mechanical condition of the aircraft following the incident. Examination revealed that the left main landing gear had broken off due to the stress of striking the ditch after departing the runway. Damage was confirmed on the left wing as a direct consequence of the gear failure and subsequent impact.

Findings

  • The pilot experienced a wind shift from a right-quartering headwind to a right-quartering tailwind during rollout.
  • Large gusts associated with the wind shift raised the tail and right wing.
  • The aircraft departed the runway on the right side.
  • The left main landing gear broke off after encountering a ditch.
  • Damage occurred to the left wing as a result of the landing gear failure.

Safety message

Pilots should be vigilant for sudden wind shifts and gusts during the critical rollout phase of landing, particularly when operating with quartering winds that can affect aircraft control and stability.

Probable cause

The pilot's failure to maintain directional control during rollout due to a wind shift and gusts, which resulted in the aircraft departing the runway.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X30647. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.