NTSB CAROL · Event
Event CEN20CA059
Registry · N227L
FAA Aircraft Registry record.
Make / Model
ZENITH STOL CH 750
Seats / Engines
2 seats · 1 engine
ADS-B equipped
Yes — Mode-S A1FBFC
Registrant of record
GRAF DAVID R
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The pilot’s failure to maintain airplane control during landing, which resulted in the right tire contacting the runway first followed by the left wing.
Factual narrative
The pilot reported that the flight was the first flight of the experimental amateur- built airplane. He was landing at the airport when the accident occurred. He stated that he was lined up with the runway center line, that his airspeed was 60 mph, and the tachometer registered 1,600 rpm, when he felt the right tire contact the runway. He said, "In an instant the left wing came down and the left tire and axle [were] sheared off. The left wing contacted the runway and the plane skidded about 40 feet and came to a full stop." The pilot stated he used a higher landing airspeed since he had been told by other builders of that airplane that he needed to land with speed "so as not get near the stall speed as this aircraft does have leading edge slats and this equates to a high lift wing." The pilot stated that the wind was calm, the altimeter setting was 30.12 inches, and the temperature was 55°F. The wind recorded at an airport 8 miles north of the accident airport was from 200° at 12 knots. Postaccident examination of the airplane revealed that the left wing tip was bent up, the nose landing gear "U" channel was bent 90°, and the skin around the left wing strut and landing gear attachment points were buckled. There were no reported preimpact anomalies with the airplane. The pilot reported that the flight was the first flight of the experimental, amateur-built airplane. He stated that he was lined up with the runway centerline for landing, that the airspeed was 60 mph, and that the tachometer was showing 1,600 rpm when he felt the right tire contact the runway. He said "in an instant the left wing came down and the left tire and axle [were] sheared off. The left wing impacted the runway and the plane skidded about 40 feet and came to a full stop." The pilot used a higher landing airspeed because he had been told by other builders of that airplane that he needed to land with speed "so as not [to] get near the stall speed as this aircraft does have leading edge slats and this equates to a high lift wing." Postaccident examination of the airplane revealed that the nose landing gear and the left wing strut sustained substantial damage. 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 Aircraft-Aircraft oper/perf/capability-Performance/control parameters-(general)-Not attained/maintained - C
- C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
Verbatim from NTSB's published report. Source file
NTSB_2019_CEN20CA059.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (stall). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- NASA NTRS 2026 · Conference Paper
Computational Analysis of Steady State Aerodynamics of Transonic Truss-Braced Wing Configuration in Deep Stall
This study presents a computational investigation of steady state aerodynamics of the Subsonic Ultra-Green Aircraft Research (SUGAR) Transonic Truss-Braced Wing (TTBW) configuration over a wide range …
- arXiv 2023 · arXiv preprint
Automating Bird Diverter Installation through Multi-Aerial Robots and Signal Temporal Logic Specifications
This paper tackles the task assignment and trajectory generation problem for bird diverter installation using a fleet of multi-rotors.
- arXiv 2023 · arXiv preprint
Variation of Critical Crystallization Pressure for the Formation of Square Ice in Graphene Nanocapillaries
Two-dimensional square ice in graphene nanocapillaries at room temperature is a fascinating phenomenon and has been confirmed experimentally.
- arXiv 2023 · arXiv preprint
Polycrystallinity enhances stress build-up around ice
Damage caused by freezing wet, porous materials is a widespread problem, but is hard to predict or control. Here, we show that polycrystallinity makes a great difference to the stress build-up process…
- arXiv 2022 · arXiv preprint
Enhanced Prediction of Three-dimensional Finite Iced Wing Separated Flow Near Stall
Icing on three-dimensional wings causes severe flow separation near stall. Standard improved delayed detached eddy simulation (IDDES) is unable to correctly predict the separating reattaching flow due…
- 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…
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