NTSB CAROL · Event
Event LAX94LA175
Registry · N4045N
FAA Aircraft Registry record.
Make / Model
MOONEY M20C
Year of manufacture
1968 · 26 years old at event
Engine
LYCOMING O&VO-360 SER (180 hp)
Seats / Engines
4 seats · 1 engine
ADS-B equipped
Yes — Mode-S A4BE91
Registrant of record
PRIVATE FLIGHTS INC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
THE PILOT'S FAILURE TO FOLLOW PROPER PROCEDURES BY ASSURING THAT THE LANDING GEAR LOCKING MECHANISM WAS PROPERLY ENGAGED.
Factual narrative
On March 28, 1994, at 1630 hours Pacific standard time, a Mooney M-20C, N4045N, gear collapsed while landing on runway 14 at Hyampom Airport, Hyampom, California. The pilot was completing a visual flight rules personal flight. The airplane, registered to and operated by the pilot, sustained substantial damage. Neither the certificated private pilot nor any of the three passengers were injured. Visual meteorological conditions prevailed. The flight originated at Hayfork Airport, Hayfork, California, at 1615 hours. The pilot reported in a telephone interview conducted on March 28, 1994, that the landing gear is a mechanically operated system. During the landing roll, the landing gear handle disengaged from its latching mechanism and the landing gears retracted. He also said that he encountered turbulence when he extended that landing gear. The Safety Board retained Mr. Paul Israel, General Aviation Enterprises, Hayfork, California, to examine the airplane's landing gear system. Mr. Israel reported that he was unable to dislodge the handle (aka Johnson Bar) after placing the airplane on jacks with the landing gear extended. The handle was in the locked position. He also said that he did not find any landing gear system defects. WHILE ON THE DOWNWIND LEG, THE PILOT FAILED TO PROPERLY ENGAGE THE LANDING GEAR HANDLE IN THE EXTENDED POSITION LOCKING MECHANISM. DURING THE LANDING ROLL-OUT, THE LANDING GEAR HANDLE DISLODGED FROM THE LOCKING MECHANISM AND THE LANDING GEARS RETRACTED. THE POST ACCIDENT EXAMINATION OF THE LANDING GEAR LOCKING MECHANISM REVEALED NO EVIDENCE OF ANY PREEXISTING MALFUNCTIONS OR FAILURES. THE LANDING GEAR LOCKING MECHANISM OPERATED NORMALLY. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1994_LAX94LA175.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 (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.
- 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.
- 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.
- arXiv 2025 · arXiv preprint
Explainable LiDAR 3D Point Cloud Segmentation and Clustering for Detecting Airplane-Generated Wind Turbulence
Wake vortices - strong, coherent air turbulences created by aircraft - pose a significant risk to aviation safety and therefore require accurate and reliable detection methods.
- arXiv 2024 · arXiv preprint
Does small-scale turbulence matter for ice growth in mixed-phase clouds?
Representing the glaciation of mixed-phase clouds in terms of the Wegener-Bergeron-Findeisen process is a challenge for many weather and climate models, which tend to overestimate this process because…
- arXiv 2023 · arXiv preprint
Effects of electrostatic interaction on clustering and collision of bidispersed inertial particles in homogeneous and isotropic turbulence
In sandstorms and thunderclouds, turbulence-induced collisions between solid particles and ice crystals lead to inevitable triboelectrification.
- SKYbrary (Eurocontrol) 2023 · SKYbrary article
Wake Vortex Turbulence — SKYbrary Knowledge Base
SKYbrary wake vortex turbulence comprehensive article — generation mechanics, dissipation factors, separation standards (ICAO LIGHT/MEDIUM/HEAVY/SUPER + recategorisation RECAT-EU).
Browse the full corpus — academia portal ↗