NTSB CAROL · Event
Event SEA96LA163
Aircraft involved
Probable cause & findings
the pilot's improper planning/decision, and his failure to ensure that the airplane would remain clear of trees during the takeoff. Factors relating to the accident were: high density altitude, and the proximity of trees to the runway.
Factual narrative
On July 23, 1996, approximately 1415 Pacific Daylight time, a Cessna 152, N49794, operated by Apple Valley Air in Omak, WA, sustained substantial damage when it impacted trees near Stehekin State Airport near Stehekin, WA. Visual meteorological conditions prevailed and no flight plan had been filed. The private pilot, the sole occupant, was seriously injured. The 14 CFR 91 personal flight was on takeoff from Stehekin to Omak, Washington when the aircraft hit trees. During a telephone interview with the pilot, he stated that he seemed to have good speed on the takeoff roll. However, by the time he was over the trees at the end of the runway, he said that the stall warning buzzer was sounding and he could not clear the trees. In the pilot's accident report he stated that "Power stall on takeoff, hit tops of trees at 40 knots, flash engine fire immediately, plane then fell approx 30ft." The Stehekin State Airport is at 1230 feet MSL. Weather at the time was reported by the pilot to be 85 degrees with a pressure reading of 30.00. Under these conditions the density altitude was about 3080 ft. The operator estimated the fuel on board at takeoff was about 19 to 21 gallons. While departing from a dirt runway in mountainous terrain, the airplane hit trees at the departure end of the runway. The pilot stated that the airplane seemed to have good speed on the takeoff roll; however, by the time he was over the trees at the end of the runway, the stall warning buzzer was sounding. The pilot said he could not get the airplane to clear the trees. The airport elevation was 1230 feet msl. Weather at the time was reported by the pilot to be 85 degrees with a pressure reading of 30.00. Under these conditions, the density altitude was about 3080 ft. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1996_SEA96LA163.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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