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Atlas / NTSB / WPR20CA103

NTSB CAROL · Event

Event WPR20CA103

2020-02-28 Sonoma/Schellville, California, United States Airport · 0Q3 None 1 aircraft Status: Completed

Aircraft involved

Probable cause & findings

The pilot's inadvertent activation of the left brake during the landing roll, which resulted in a loss of directional control, a runway excursion, and collision with a ditch.

Factual narrative

The pilot reported that during a wheel landing in the tailwheel equipped airplane, he inadvertently applied left brake pressure and the airplane veered off the edge of the runway into tall grass. Corrective action was ineffective and the airplane subsequently collided with an irrigation ditch, substantially damaging the nose and firewall. The pilot reported that there were no mechanical anomalies with the airplane that would have precluded normal operation. The pilot reported that, during a wheel landing in the tailwheel-equipped airplane, he inadvertently applied left brake pressure, and the airplane veered off the edge of the runway into tall grass. The pilot's corrective action was ineffective, and the airplane subsequently impacted an irrigation ditch, which resulted in substantial damage to the nose and firewall. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).

  • C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
  • C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Directional control-Not attained/maintained - C
  • C Aircraft-Aircraft systems-Landing gear system-Brake-Unintentional use/operation - C
  • C Personnel issues-Task performance-Use of equip/info-Use of equip/system-Pilot - C
  • C Environmental issues-Physical environment-Terrain-Sloped/uneven terrain-Effect on operation - C

Verbatim from NTSB's published report. Source file NTSB_2020_WPR20CA103.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Related research

What the literature says.

Academic papers and agency reports matching this event's aircraft type or causal vocabulary (runway excursion). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.

Browse the full corpus — academia portal ↗