NTSB CAROL · Event
Event LAX90FA070
Registry · N8251B
FAA Aircraft Registry record.
Make / Model
SMITH DAVID B RANS S7 COURIER
Year of manufacture
1994
Engine
BOMBARDIER ROTAX (ALL)
Seats / Engines
2 seats · 1 engine
Last airworthiness date
20260130
ADS-B equipped
Yes — Mode-S AB45EB
Registrant of record
SCHROEDER DALE R
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
POOR JUDGEMENT OF THE INSTRUCTOR PILOT (CFI) DUE TO HIS IMPAIRMENT FROM USE OF MARIJUANA, INADEQUATE SUPERVISION OF THE FLIGHT BY THE CFI, AND HIS FAILURE TO ASSURE THAT ADEQUATE AIRSPEED WAS MAINTAINED, WHICH RESULTED IN AN INADVERTENT STALL. FACTORS RELATED TO THE ACCIDENT WERE: THE CFI'S INADEQUATE PREFLIGHT PLANNING/PREPARATION, AND HIS FAILURE TO ASSURE THE AIRCRAFT WAS WITHIN ITS CERTIFIED GROSS WEIGHT LIMIT.
Factual narrative
THE ACFT WAS SCHEDULED FOR A NGT INSTRUMENT TRAINING FLT WITH 2 ADDITIONAL PLTS ABOARD, WHO WERE SEEKING INSTRUMENT RATINGS. SHORTLY AFTER TAKING OFF FROM RWY 7, THE INSTRUCTOR (CFI) RADIOED TO THE TOWER THAT AN IMMEDIATE LNDG WAS NECESSARY, BUT HE DID NOT GIVE A REASON. THE FLT WAS CLRD TO LAND. THE ACFT WAS THEN OBSERVED TO ENTER A STEEP LEFT TURN AT LOW ALT & DESCEND ABRUPTLY. IT CRASHED IN A STEEP DESCENT ABOUT 500 FT NORTH OF RWY 7 ON A HEADING OF ABOUT 260 DEG. IMPACT OCCURRED IN A LEFT WING LOW, NOSE DOWN ATTITUDE. NO PREIMPACT PART FAILURE OR MALFUNCTION OF THE ACFT OR ENG WAS FOUND. TESTS OF THE CFI'S BLOOD SHOWED THAT IT CONTAINED 1 NG/ML OF DELTA-9-TETRAHYDROCANNABINOL (A PSYCHOACTIVE COMPONENT OF MARIJUANA) & 7 NG/ML OF DELTA-9-TETRAHYDROCANNABINOL CARBOXYLIC ACID (A METABOLITE OF MARIJUANA). GROSS WT OF THE ACFT WAS ESTIMATED TO BE 2411 LBS; ITS MAX CERTIFIED GROSS WT WAS 2325 LBS. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1990_LAX90FA070.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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