NTSB CAROL · Event
Event LAX91LA118
Aircraft involved
Probable cause & findings
THE FAILURE OF THE PIC TO SUPERVISE A NON-CERTIFICATED PILOT AND TO MAINTAIN ADEQUATE AIRSPEED WITH SUBSEQUENT COLLISION WITH TREES. CONTRIBUTING TO THE ACCIDENT WAS THE FAILURE OF THE PIC TO OBTAIN A WEATHER BRIEFING AND ASSESS HAZARDOUS WIND CONDITIONS AND OVERCONFIDENCE IN THE PILOT'S ABILITY TO DEAL WITH THE WEATHER AND AIRPLANE PERFORMANCE ISSUES.
Factual narrative
THE CERTIFICATED COMMERCIAL PILOT AND A NON-CERTIFICATED PASSENGER, BOTH CO-OWNERS OF THE AIRPLANE, DEPARTED THE AIRPORT WITH THE PASSENGER AT THE CONTROLS. AFTER TAKEOFF, THE AIRPLANE ENCOUNTERED TURBULENCE, GUSTY WINDS AND WIND SHEAR AND WAS UNABLE TO CLIMB OVER ABOUT 300 FEET ABOVE GROUND LEVEL. THE PILOT-IN-COMMAND TOOK OVER THE CONTROLS AND BEGAN MANEUVERING THE AIRPLANE TO AVOID RISING TERRAIN AND ATTEMPTED TO GAIN OROGRAPHIC LIFT FROM SURROUNDING HILLS. WITH THE STALL WARNING SOUNDING, THE AIRPLANE STRUCK A TREE ON A RIDGE LINE ABOUT 1 MILE FROM THE AIRPORT. THE AIRPLANE THEN DESCENDED THROUGH SEVERAL OTHER TREES AND WAS DESTROYED. A SIGMET WAS IN EFFECT FOR LOW LEVEL WIND SHEAR. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1991_LAX91LA118.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 (wind shear, stall, turbulence). 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 2019 · Contractor Report (CR)
An Examination of Aviation Accidents Associated with Turbulence, Wind Shear and Thunderstorm
The focal point of the study reported here was the definition and examination of turbulence, wind shear and thunderstorm in relation to aviation accidents.
- Embry-Riddle Scholarly Commons 2021 · Journal article (IJAAA)
Comparative Study on the Prediction of Aerodynamic Characteristics of Mini - Unmanned Aerial Vehicle with Turbulence Models
When dealing with CFD simulations the turbulent nature is seen on most of the engineering flows and these flows need to be solved.
- arXiv 2020 · arXiv preprint
Numerical Simulation of Iced Wing Using Separating Shear Layer Fixed Turbulence Models
Aerodynamic prediction of glaze ice accretion on airfoils and wing is studied using the Reynolds-averaged Navier-Stokes method.
- NASA NTRS 2019 · Conference Paper
Optimal recovery from microburst wind shear
The flight path of a twin-jet transport aircraft is optimized in a microburst encounter during approach to landing. The objective is to execute an escape maneuver that maintains safe ground clearance …
- NASA NTRS 2019 · Preprint (Draft being sent to journal)
Convectively Induced Turbulence Encountered During NASA's Fall-2000 Flight Experiments
Aircraft encounters with atmospheric turbulence are a leading cause of in-flight injuries aboard commercial airliners and cost the airlines millions of dollars each year.
- NASA NTRS 2019 · Conference Paper
Prediction of stall and post-stall behavior of airfoils at low and high Reynolds numbers
An interactive boundary-layer method, together with the e(super n)-approach to the calculation of transition, has been used to predict the stall and post-stall behavior of airfoils at low and high Rey…
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