NTSB CAROL · Event
Event OAK66D0261
Registry · N155L
FAA Aircraft Registry record.
Make / Model
BEECH D55
Year of manufacture
1968
Engine
CONT MOTOR IO 520 SERIES (285 hp)
Seats / Engines
6 seats · 2 engines
Last airworthiness date
19680102
ADS-B equipped
Yes — Mode-S A0DDBC
Registrant of record
UNDERWOOD ROBERT
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Historical record (pre-1982)
NTSB recorded this accident in the pre-1982 coded-field schema — structured fields rather than free-text narrative. Decoded codes use established NTSB single-letter taxonomies; cause factors remain verbatim pending the Form 6120.4 codebook lookup.
Aircraft
BEECH 65 · N155L
Damage
Substantial
Craft type
Airplane
Classification
Accident
Light condition
Dawn
Weather
VMC
Phase of flight
EE
Operator type
Personal/private
Airport
SAN JOSE
Kind of flying
A0
Weather at impact
Sky
CLEAR
Aircraft history
Total time
3,239 hrs
Pilot
Certificate
DA (DA)
Total hours
5,500
Age
42
Investigator remarks
LEFT MAIN GEAR ACTUATOR DRIVE GEAR TEETH FAILED
Cause factors
- 70/A/CB A AIRFRAME NORMAL RETRACTION/EXTENSION ASSEMBLY Cause — pilot/personnel action
- 88/A/95 A MISCELLANEOUS ACTS,CONDITIONS MATERIAL FAILURE Cause — pilot/personnel action
Decoded against the NTSB Form 6120.4 cause-factor codebook (ct_Pre1982 table). Each row shows the raw triplet, modifier (Cause / Factor / etc.), category, and specific code.
Source: NTSB pre-1982 historical archive. Docket
3 0879.
Source file
NTSB_1966_3_0879.txt.
Modern CAROL record 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. 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
Trajectory Optimization of Morphing Aerial Vehicles Based on Mid-Fidelity Aeroservoelastic Models
Morphing aerial vehicles offer enhanced maneuverability and fuel efficiency compared to fixed-wing configurations. However, the trade-off between performance gains and control cost in dynamic, unstead…
- arXiv 2025 · arXiv preprint
Hovering efficiency optimization of the cycloidal propeller with end plates
Cycloidal propellers are known for their omnidirectional vectored thrust, enabling smooth transitions between hovering and forward flight, making them ideal for unmanned aerial vehicles (UAVs) and ele…
- arXiv 2025 · arXiv preprint
Shepherd Grid Strategy: Towards Reliable SWARM Interception
Modern unmanned aerial vehicle threats require sophisticated interception strategies that can overcome advanced evasion capabilities and operate effectively in contested environments.
- Embry-Riddle Scholarly Commons 2025 · Journal article (IJAAA)
Bibliometric Analysis with R Biblioshiny on Safety Behavior in Aviation
Safety behaviors in aviation are not limited to technical knowledge and skills in ensuring the safety of flight operations, but also include the attitudes, decision-making processes and collaborations…
- NASA NTRS 2024 · Accepted Manuscript (Version with final changes)
Inverse Modeling of the Initial Stage of the 1991 Pinatubo Volcanic Cloud Accounting for Radiative Feedback of Volcanic Ash
The way volcanic clouds evolve is very sensitive to the initial spatial 3D distributions of volcanic materials, which are often unknown. In this study, we conducted inverse modeling of the Mt.
- NASA NTRS 2024 · Reprint (Version printed in journal)
Comparative Analysis of Empirical and Machine Learning Models for Chla Extraction Using Sentinel-2 and Landsat OLI Data: Opportunities, Limitations, and Challenges
Remote retrieval of near-surface chlorophyll-a (Chla) concentration in small inland waters is challenging due to substantial optical interferences of various water constituents and uncertainties in th…
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