CEN21LA425
2021-09-13 · Steamboat Springs, Colorado, United States · Serious · 1 aircraft · Status: Completed
Airport N/A
Aircraft involved
Probable cause & findings
The pilot’s failure to maintain adequate airspeed and his exceedance of the airplane’s critical angle of attack, which resulted in an aerodynamic stall.
Factual narrative
On September 13, 2021, at 1830 mountain daylight time, a Kolb Mark III airplane, N4365E, was substantially damaged when it was involved in an accident near Steamboat Springs, Colorado. The pilot sustained serious injuries. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot’s wife, who witnessed the accident, reported that the pilot recently purchased the airplane. She stated that the pilot flew the airplane with the previous owner in Indiana before driving it on a trailer to Steamboat Springs. On the day of the accident, the pilot intended to taxi the airplane around his private airstrip to get used to the feel of the airplane. The airplane subsequently lifted off, cleared several fences, but only made it about 20 ft above the ground when the airplane’s nose suddenly lowered and impacted the ground. The airplane sustained substantial damage to the fuselage. The witness stated the engine was still running and she was unable to turn it off when she reached the accident site. The pilot told the witness that he did not command the airplane down but that it just fell. The pilot later told a family member that he stalled the airplane. The airplane was not made available for investigators to examine the airframe or flight control system. The pilot did not submit the National Transportation Safety Board Pilot/Operator Aircraft Accident/Incident Report (NTSB Form 6120.1). The pilot flew the airplane with the previous owner in Indiana before purchasing it and driving it on a trailer to Steamboat Springs. A witness reported that the pilot intended to taxi around his private airstrip to get a better feel for the airplane. The airplane subsequently lifted off the ground, cleared several fences, and was about 20 ft above the ground when the airplane’s nose suddenly lowered and impacted the ground. The airplane sustained substantial damage to the fuselage. The pilot told the witness that he did not intentionally lower the nose of the airplane. The pilot later told a family member that he stalled the airplane. The airplane was not made available for investigators to examine. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12
NTSB Findings
FAA avdata. C = Cause, F = Factor.
- — Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Airspeed-Not attained/maintained
- — Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot
- — Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Angle of attack-Capability exceeded
Verbatim from NTSB's published report. Source file
NTSB_2021_CEN21LA425.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
Matched on aircraft type or causal vocabulary (stall). All research papers
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- Embry-Riddle Scholarly Commons 2021 · Journal article (JAAER) Analysis on the Negative Emotional, Physiological, and Cognitive Responses Elicited from of the Activation of a Stall Alarm
Failing to identify an aerodynamic stall can lead to the inability of an aircraft to sustain flight. To warn pilots of an impending or fully-developed stall, many aircraft have safety devices installe…