NTSB CAROL · Event
Event WPR20LA309
Registry · N933V
FAA Aircraft Registry record.
Make / Model
BIRD CK
Year of manufacture
1931 · 89 years old at event
Engine
CONT MOTOR W670 SERIES (250 hp)
Seats / Engines
3 seats · 1 engine
Last airworthiness date
19940722
ADS-B equipped
Yes — Mode-S ACF2A9
Registrant of record
STANGEL RICHARD C
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The pilot’s failure to maintain directional control during landing, which resulted in a runway excursion and collision with terrain.
Factual narrative
The pilot reported that, before landing, the throttle was increased to maintain altitude to correct his position over the runway, however, the engine sputtered and the airplane lost altitude and the main landing gear touched the runway. Being angled on the runway, the pilot applied full power to go-around and change direction away from hangars. The pilot expected to climb; however, the airplane would not maintain altitude or climb. The engine was running, but it would not develop enough power to get positive response on the flight controls. The pilot subsequently landed in a field to the right side of the runway. The landing gear collapsed, and both the upper and lower wings were substantially damaged. While securing the airplane, the pilot reported that the carburetor heat was in the on position during the landing. The pilot reported that there were no preaccident mechanical failures or malfunctions 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).
- — Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Directional control-Not attained/maintained
- — Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot
- — Aircraft-Aircraft power plant-Engine controls-(general)-Incorrect use/operation
- — Environmental issues-Physical environment-Terrain-Rough terrain-Contributed to outcome
Verbatim from NTSB's published report. Source file
NTSB_2020_WPR20LA309.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 (runway excursion, go-around). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
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Engine Bird Ingestion Certification Testing — Large Flocking Birds
Hughes Technical Center bird-ingestion certification testing for turbofan engines — drove revisions to FAR 33.76 large-bird ingestion thresholds after the Hudson River ditching (NTSB AAR-11/01).
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Loss of Thrust in Both Engines After Encountering a Flock of Birds — US Airways 1549
US Airways 1549 (A320) Hudson River ditching, January 15, 2009. NTSB investigation of the successful ditching of US Airways 1549 in the Hudson River after a Canada Goose strike disabled both CFM56 eng…
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An Exact Algorithm for Load-Dependent Traveling Salesman Problem for Unmanned Aerial Vehicle Package Delivery
In this article, we present a novel formulation for the load-dependent traveling salesman problem (LD-TSP), in which travel cost (or energy expended) depends on the vehicle's current load.
- arXiv 2026 · arXiv preprint
Non-Oberbeck-Boussinesq effects in coldwater
Water exhibits an anomalous nonlinear temperature-density ($ρ$-$T$) relation as it approaches freezing, along with an increase in viscosity, and a decrease in thermal conductivity.
- arXiv 2026 · arXiv preprint
Trajectory Tracking Control Design for Autonomous Helicopters with Guaranteed Error Bounds
This paper presents a systematic framework for computing formally guaranteed trajectory tracking error bounds for autonomous helicopters based on Robust Positive Invariant (RPI) sets.
- arXiv 2026 · arXiv preprint
Flocking behavior for dynamic and complex swarm structures
Maintaining the formation of complex structures with multiple UAVs and achieving complex trajectories remains a major challenge.
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