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PIPER PA-25-235 accident at Twisp, WA, 20 Jun 2021

Twisp, WA, United States

On June 20, 2021, a PIPER PA-25-235 operated by EVERGREEN SOARING INC was involved in an aviation accident near Twisp, WA. No fatalities were reported. Investigators recorded the probable cause as: An in-flight separation of the control stick from the torque tube assembly, which resulted in a loss of directional control during the landing roll and subsequent on-ground collision. This summary draws on records from NTSB; 13 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 2026-08-03Data APIEditorial standards

Probable cause

An in-flight separation of the control stick from the torque tube assembly, which resulted in a loss of directional control during the landing roll and subsequent on-ground collision.

— NTSB Determination

Contributing factors

MalfunctionDirectional control — Not attained/maintainedFasteners

Related events

Same aircraft family

Same operator

Frequently asked questions

What happened in the 20 Jun 2021 PIPER PA-25-235 accident near Twisp, WA?

An in-flight separation of the control stick from the torque tube assembly, which resulted in a loss of directional control during the landing roll and subsequent on-ground collision.

Were there any fatalities in the 20 Jun 2021 PIPER PA-25-235 accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 20 Jun 2021 involved a PIPER PA-25-235, operated by EVERGREEN SOARING INC, at Twisp, WA.

What was the probable cause of the accident?

An in-flight separation of the control stick from the torque tube assembly, which resulted in a loss of directional control during the landing roll and subsequent on-ground collision.

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