CHI01LA239
2001-07-21 · Wautoma, Wisconsin, United States · Minor · 1 aircraft · Status: Completed
Airport Y50
Aircraft involved
Probable cause & findings
The pilot's failure to maintain airspeed, resulting in a stall. An inadequate pitch setting of the propeller is a contributing factor.
Factual narrative
On July 21, 2001, at 1700 central daylight time, an amateur-built Anderson Revelation, N6116S, piloted by a commercial pilot, sustained substantial damage during an in-flight collision with the terrain following a loss of control during initial climb from runway 08 (2,280 feet by 175 feet, dry/turf) at the Wautoma Municipal Airport, Wautoma, Wisconsin. Visual metrological conditions prevailed at the time of the accident. The test flight was conducted under the provisions of 14 CFR Part 91 and was not on a flight plan. The pilot, the sole occupant, reported minor injuries. The local flight was departing at the time of the accident. According to the pilot, the airplane was recently certified as an amateur-built aircraft and was departing on its second flight since certification. The pilot reported that during the first flight the engine tachometer was reading 1,000 rpm lower than the specified range. The pilot stated that subsequent to the first flight the propeller blade pitch was adjusted to a finer setting to achieve the desired static engine rpm. According to the pilot, on the second flight, the airplane did not accelerate normally when out of ground effect and would not climb above approximately 30 feet. The pilot reported that there was not enough runway remaining to land and he started a shallow right turn to keep over the airport area. The pilot reported, "While maintaining 60 mph IAS [indicated airspeed] in a shallow bank, the wing stalled & I was unable to recover before impact with a corn field. The plane hit the ground with right wing about 30 [degrees] low and 20-30 [degrees] nose low." No anomalies were found with the airframe or its engine that could be associated with any pre-impact condition. Prior to the accident flight, which was the experimental homebuilt airplane's second flight since certification, the propeller was adjusted to a finer setting to achieve the desired static engine rpm. The pilot stated that after the takeoff during the accident flight, the airplane did not accelerate normally when out of ground effect and would not climb above approximately 30 feet. The pilot reported that there was not enough runway remaining to land and he started a shallow right turn to keep over the airport area. The pilot reported, "While maintaining 60 mph IAS [indicated airspeed] in a shallow bank, the wing stalled & I was unable to recover before impact with a corn field. The plane hit the ground with right wing about 30 [degrees] low and 20-30 [degrees] nose low." No anomalies were found with the airframe or its engine that could be associated with any pre-impact condition. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_2001_CHI01LA239.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, loss of control). All research papers
- Semantic Scholar 2016 · Article (Interacción) Trajectory Recovery System: Angle of Attack Guidance for Inflight Loss of Control
This paper describes the design and development of an ecological display to aid pilots in the recovery of an In-Flight Loss of Control event due to a Stall (ILOC-S).
- NTSB Aircraft Accident Reports 2010 · Accident report Loss of Control on Approach — Colgan Air Flight 3407
Colgan Air 3407 / Continental Connection (Q400) Buffalo NY, February 12, 2009 — 50 fatalities. Definitive investigation of the Colgan 3407 stall-stick-pusher crash on approach to Buffalo.
- 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 …
- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER) A Scoping Review of Aviation Loss of Control Inflight Research
Loss of control – inflight (LOC-I) contributes to aircraft accidents at unacceptably high rates. Significant industry efforts and research have aimed to improve LOC-I prevention, detection, and recove…
- SKYbrary (Eurocontrol) 2024 · SKYbrary article Loss of Control In-Flight (LOC-I) — SKYbrary Knowledge Base
SKYbrary comprehensive knowledge-base entry on Loss of Control In-Flight — definitions, contributing factors, accident case studies (Air France 447, Colgan 3407), and prevention strategies.
- Semantic Scholar 2024 · Article (International Conference on Networking and Services) Risk Assessment of Loss of Control In-Flight Trajectories for Urban Air Mobility Safety
In Urban Air Mobility (UAM), maintaining a minimum separation between aircraft is a safety requirement, which becomes challenging amidst congested air traffic and off-nominal conditions, such as Loss …