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WPR11CA109

2011-01-26 · Helena, Montana, United States · None · 1 aircraft · Status: Completed

Airport KHLN

Aircraft involved

Probable cause & findings

The certified flight instructor's loss of airplane control during the landing roll in a gusting crosswind.

Factual narrative

During the first part of the training flight in the conventional wheel (tail wheel-equipped) airplane, the pilot receiving instruction made four stop-and-go landings on a runway that was almost directly aligned with the oncoming wind. At that point the instructor pilot took over in order to demonstrate a landing on a different runway where there was a crosswind of about 10 to 12 knots at 90 degrees to the runway. The instructor pilot made a successful touchdown on the main landing gear wheels, but as the airplane slowed and he began to lower the tail to the runway surface, the upwind wing was lifted by a gust of wind. Although the instructor pilot made control inputs to counter the lifting of the wing, the opposite wing impacted the surface of the runway, and the airplane veered toward the upwind runway edge. Before the instructor pilot could regain directional control, the airplane departed the right side of the runway, entered an area of soft terrain, and nosed over onto its back. According to the instructor pilot, there was no evidence of a flight control or rudder control malfunction. During the first part of the training flight in the tailwheel-equipped airplane, the pilot receiving instruction made four takeoffs and landings on a runway that was almost directly aligned with the oncoming wind. At that point the certified flight instructor (CFI) took over in order to demonstrate a landing on a different runway where there was a crosswind of about 10 to 12 knots at 90 degrees to the runway. The CFI made a successful touchdown on the main landing gear wheels, but as the airplane slowed and he began to lower the tail to the runway surface, the upwind wing was lifted by a gust of wind. When the CFI made control inputs to counter the lifting of the wing the opposite wing impacted the surface of the runway and the airplane veered toward the upwind runway edge. Before he could regain directional control, the airplane departed the right side of the runway, entered an area of soft terrain, and nosed over onto its back. According to the CFI, there was no evidence of a flight control malfunction prior to the accident. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

FAA avdata. C = Cause, F = Factor.

  • C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Directional control-Not attained/maintained - C
  • — Environmental issues-Conditions/weather/phenomena-Wind-Crosswind-Contributed to outcome
  • — Environmental issues-Conditions/weather/phenomena-Wind-Gusts-Contributed to outcome
  • — Environmental issues-Physical environment-Terrain-(general)-Contributed to outcome
  • C Personnel issues-Task performance-Use of equip/info-Aircraft control-Instructor/check pilot - C

Verbatim from NTSB's published report. Source file NTSB_2011_WPR11CA109.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.