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WPR20CA221

2020-07-11 · Preston, Idaho, United States · None · 1 aircraft · Status: Completed

Airport U10

N85BJ has since been reassigned. It is now registered to a different aircraft (GILLESPIE/SEARS Q-2), which was not involved in this event.

Aircraft involved

Probable cause & findings

The pilot's failure to maintain airplane control during takeoff in high density altitude conditions, which resulted in a collision with terrain. Contributing to the accident was the pilot's failure to accomplish performance calculations for the atmospheric conditions.

Factual narrative

The pilot in the tailwheel-equipped airplane reported that during the takeoff roll, about two-thirds of the way down the runway at rotation speed of 70 mph, the airplane was not lifting off as normal. At 75 mph nothing was changing so the pilot attempted to place the airplane into ground effect, "something I learned to do in other types but not this plane." The pilot recalled that he added "too much forward stick" and the airplane porpoised, ascended and rolled to the right. The pilot leveled the wings, however, the airplane descended and collided with terrain. The airplane sustained substantial damage to both wings, canard, and the empennage. The pilot reported that there were no mechanical failures or malfunctions with the airplane that would have precluded normal operation. The pilot further reported that he did not accomplish any performance planning for the atmospheric conditions before the flight. At the time of the accident, the density altitude was calculated at 6,977ft. The pilot in the tailwheel-equipped airplane reported that during the takeoff roll, about two-thirds of the way down the runway at rotation speed of 70 mph, the airplane was not lifting off as normal. At 75 mph nothing was changing so the pilot attempted to place the airplane into ground effect, "something I learned to do in other types but not this plane." The pilot recalled that he added "too much forward stick" and the airplane porpoised, ascended and rolled to the right. The pilot leveled the wings, however, the airplane descended and collided with terrain. The airplane sustained substantial damage to both wings, canard, and the empennage.   The pilot reported that there were no mechanical failures or malfunctions with the airplane that would have precluded normal operation. The pilot further reported that he did not accomplish any performance planning for the atmospheric conditions before the flight. At the time of the accident, the density altitude was calculated at 6,977ft.   Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

FAA avdata. C = Cause, F = Factor.

  • C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
  • C Personnel issues-Action/decision-Info processing/decision-Decision making/judgment-Pilot - C
  • C Environmental issues-Conditions/weather/phenomena-Temp/humidity/pressure-High density altitude-Effect on equipment - C
  • F Personnel issues-Task performance-Planning/preparation-Performance calculations-Pilot - F
  • — Environmental issues-Physical environment-Object/animal/substance-Tree(s)-Effect on equipment

Verbatim from NTSB's published report. Source file NTSB_2020_WPR20CA221.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.