Casualties unknown

Glider Tow Aircraft Damaged After Overcorrection During Landing (N4137Z)

Durango, CO, US

On June 26, 1989, a Piper PA-18-150 (registration N4137Z) operated by Lavern D. ST Clair was involved in an aviation accident near Durango, CO. Investigators recorded the probable cause as: The pilot's overcorrection during the landing rollout in a quartering tailwind, which resulted in the right wing striking the ground. 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 2026-06-10Data APIEditorial standards

A tow plane veered right during landing with a quartering tailwind. The pilot's left overcorrection caused a sharp turn, resulting in the right wing striking the ground and sustaining damage.

What happened

The incident occurred during a glider tow flight operation. The pilot initiated takeoff heading south to launch the glider. Following the release of the glider, the pilot turned back toward the airport to land on the opposite runway or direction, approaching from the north.

During the final approach and landing phase, the aircraft encountered a five-knot quartering tailwind. As the aircraft touched down and rolled out, it began to veer to the right. In an attempt to maintain directional control, the pilot applied significant left rudder input to correct the drift. This overcorrection caused the aircraft to turn sharply to the left. The sudden change in attitude and ground track resulted in the right wingtip striking the runway surface, causing structural damage to that side of the airframe.

The investigation

The physical examination of the aircraft confirmed damage consistent with a right wing strike against the ground during the landing roll. The mechanical condition of the aircraft prior to the incident was not cited as a factor in the mishap. The primary focus of the investigation was on the pilot's control inputs and the environmental conditions at the time of touchdown.

Findings

The sequence of events indicates that the quartering tailwind contributed to directional instability during landing. The pilot's reaction to the veer, specifically the excessive left correction, led to a loss of lateral control and subsequent ground contact with the right wing. No injuries were reported to the pilot or any passengers. The aircraft was damaged but no fatalities occurred.

Safety message

Pilots operating in tailwind conditions should be cautious of potential directional control issues. Overcorrection during landing rollouts can lead to loss of control and structural damage. Proper crosswind and tailwind landing techniques, including timely and proportional control inputs, are essential for maintaining runway centerline alignment.

Probable cause

The pilot's overcorrection during the landing rollout in a quartering tailwind, which resulted in the right wing striking the ground.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X28562. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.