NTSB CAROL · Event
Event LAX99LA239
Registry · N6171G
FAA Aircraft Registry record.
Make / Model
CESSNA 150K
Engine
CONT MOTOR 0-200 SERIES (100 hp)
Seats / Engines
2 seats · 1 engine
Last airworthiness date
19700319
ADS-B equipped
Yes — Mode-S A80B41
Registrant of record
MISSION FLIGHT ACADEMY
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The pilot's misjudged landing flare point and failure to maintain an adequate airspeed margin, resulting in a stall and hard landing.
Factual narrative
On June 26, 1999, at 1430 hours Pacific daylight time, a Cessna 150K, N6171G, sustained substantial damage during a hard landing at the Hesperia, California, airport. The rented airplane was operated by Learn to Fly Unlimited, LLC, under the provisions of 14 CFR Part 91. The private pilot, the sole occupant, was not injured. The personal flight originated from Redlands Municipal Airport, Redlands, California, at 1320. Visual meteorological conditions prevailed, and no flight plan was filed. The pilot stated he practiced landings at Redlands, then departed for Big Bear, California. After determining that conditions at Big Bear were unfavorable, he decided to go to Hesperia. He received no response from the Common Traffic Advisory Frequency (CTAF) and proceeded on a 45-degree entry for right traffic to runway 3. Prior to turning downwind, he observed the windsock at the east end of the field indicating the wind was almost directly down runway 21. He flew over the runway and turned left to enter left traffic for runway 21. The pilot stated he was established on final at 60 miles per hour with 30 degrees flaps and a 500-foot per minute sink rate, but decided he was high and increased the flaps to 40 degrees. He felt the approach was progressing normally. While crossing a road on the east perimeter of the airport, he experienced turbulence, which he characterized as light to moderate chop. He thought the sink rate momentarily increased as he began to flare and observed his airspeed was 60 miles per hour. As he completed the flare, he felt the sink rate stop as expected. He stated the airplane was 10 to 15 feet above the runway when it quit flying, dropped straight down, and bounced hard on the main landing gear. Before he could respond by adding power, the nose gear hit the ground and collapsed. The airplane skidded 30 to 35 feet before coming to rest off the left side of the runway. After receiving no response from the Common Traffic Advisory Frequency, the pilot proceeded on a 45-degree entry for right traffic to runway 3. Prior to turning downwind, he observed the windsock at the east end of the field indicating the wind was almost directly down runway 21. He flew over the runway and turned left to enter left traffic for runway 21. He stated he was established on final at 60 miles per hour with 30 degrees flaps and a 500-foot per minute sink rate, but decided he was high and increased the flaps to 40 degrees. He felt the approach was normal and experienced turbulence, which he described as light to moderate chop, while crossing a road on the east perimeter of the airport. He thought the sink rate momentarily increased as he began to flare and observed his airspeed was 60 miles per hour. As he completed the flare, he felt the sink rate stop as expected. He stated the airplane was 10 to 15 feet above the runway when it quit flying, dropped straight down, and bounced hard on the main landing gear. Before he could respond by adding power, the nose gear hit the ground and collapsed. The airplane skidded 30 to 35 feet before coming to a rest off the left side of the runway. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1999_LAX99LA239.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, 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.
- 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
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…
- arXiv 2026 · arXiv preprint
Direct Numerical Simulations of Ice-Ocean Boundary Turbulence
Turbulent heat and freshwater transport at ice-ocean interfaces controls glacier and iceberg melt rates, yet the underlying physics remains poorly constrained.
- 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 …
- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER)
Political Turbulence and Aviation Safety: A Cross-National Analysis of Political Stability's Effects on Aviation Accidents
To what extent does political stability affect aviation safety? This research aims to link domestic political conditions and public safety through the consideration of aviation accident frequency.
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