NTSB CAROL · Event
Event CHI04LA007
Registry · N68PS
FAA Aircraft Registry record.
Make / Model
PIPISTREL D O O SINUS 912
Year of manufacture
2023
Engine
ROTAX 912 SERIES (80 hp)
Seats / Engines
2 seats · 1 engine
Last airworthiness date
20231130
ADS-B equipped
Yes — Mode-S A90234
Registrant of record
DAHL SCOTT
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The altitude/clearance not maintained by the pilot while performing aerobatic maneuvers. Contributing factors were the planning/decision to perform an aerobatic maneuver at a low altitude.
Factual narrative
On October 10, 2003, at 1805 central daylight time, an Aviat Pitts S-2B, N68PS, owned and piloted by a commercial pilot, was destroyed when it impacted Island Lake, near Cromwell, Minnesota. Witnesses reported that the airplane was performing aerobatics prior to the accident. Visual meteorological conditions prevailed at the time of the accident. The flight was operating under the provisions of 14 CFR Part 91. The pilot was fatally injured. The flight originated from Duluth International Airport, Duluth, Minnesota, at 1740. According to the Carlton County Sheriff's Department Report, a witness was walking when he saw the airplane flying over the lake. He said that the airplane was climbing and appeared to be stalled. It then turned into a sharp angle downward and went down toward the lake. He said that at one point he saw smoke coming from the airplane. A second witness stated that he was outside his residence when he saw the airplane fly over at 30 feet above the trees in an eastbound direction. He heard the engine, and it was very loud. It sounded as though it was at full throttle. The witness said that he saw smoke coming out of the airplane. A third witness, who was a friend of the pilot and knew his routine, said that he was watching the airplane prior to the accident and that it was at an altitude of about 1,500 feet. He said the airplane rolled into a spin and upon reaching one turn into the spin it turned smoke on. He said that what he saw was an intentional spin and that this was an actual aerobatic maneuver that the pilot has performed. He said that the pilot started the recovery and a pull out about 150 - 200 feet. An autopsy of the pilot was conducted by the St. Louis County, Office of the Medical Examiner, Hibbing, Minnesota. The Federal Aviation Administration’s Final Forensic Toxicology Fatal Accident Report reported the following: no carbon monoxide detected in blood, no cyanide detected in blood, no ethanol detected in blood, no drugs listed above detected in blood. Divers reported that the pilot was seated in the rear seat and was wearing the airplane restraint harness and a parachute. The airplane was in 14 - 16 feet of water about 300 feet from shore. Examination of the airplane by a Federal Aviation Administration Inspector confirmed flight control continuity to the flight controls. The airplane was equipped with a smoke system. The airplane impacted a lake while performing aerobatics at an altitude of about 1,500 feet above ground level. A witness, who stated that he was familiar with the pilot's aerobatic routine stated that the pilot began an intentional spin about 1,500 feet above ground level (AGL), initiated a recovery at 150-200 feet AGL, and impacted the lake. Examination of the wreckage confirmed flight control continuity. The pilot was found in the rear seat secured by the airplane restraint harness. He was wearing a parachute. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_2003_CHI04LA007.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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