NTSB CAROL · Event
Event ANC91LA076
Aircraft involved
Probable cause & findings
THE UNCERTIFICATED PILOT FAILED TO MAINTAIN AIRCRAFT CONTROL DURING THE INITIAL CLIMB AND THE PHYSICAL IMPAIRMENT BY DRUGS (MARIJUANA) OF THE PILOT. CONTRIBUTING TO THE ACCIDENT WAS THE STALL WHICH WAS NOT IDENTIFIED BY THE NONRATED PILOT.
Factual narrative
SHORTLY AFTER TAKEOFF THE AIRPLANE MADE A LEFT BANK, STALLED, AND CRASHED INTO THE LAKE APPROXIMATELY 200 YARDS OFFSHORE. THE INVESTIGATION REVEALED THAT THE PILOT DID NOT HOLD EITHER A FAA PILOT CERTIFICATE OR MEDICAL CERTIFICATE AT THE TIME OF THE ACCIDENT. TWO PASSENGERS WERE SITTING IN ONE SEAT; ONE PASSENGER WAS ON THE LAP OF THE OTHER. THE AUTOPSY REPORT SHOWED A HIGH LEVEL OF DRUG CANNABINOIDS (MARIJUANA) WHICH WOULD INDICATE THE PIC HAD BEEN SMOKING IMMEDIATELY BEFORE THE CRASH. LEVELS FOUND WERE DELTA 9 C THC: 31 NG./ML; 11 HYDROXY DELTA 9 THC: 6.6 NG./ML. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1991_ANC91LA076.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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