NTSB CAROL · Event
Event MIA68D0230
Registry · N9500
FAA Aircraft Registry record.
Make / Model
WACO ASO
Year of manufacture
1928 · 39 years old at event
Engine
CONT MOTOR W670 SERIES (250 hp)
Seats / Engines
3 seats · 1 engine
Last airworthiness date
19560404
ADS-B equipped
Yes — Mode-S AD36FF
Registrant of record
DEAN JAMES J
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
WACO ASO · N9500
Damage
Substantial
Craft type
Airplane
Classification
Accident
Light condition
Dawn
Weather
VMC
Phase of flight
DL
Operator type
Part 135 (air taxi/commuter)
Airport
HUGGINS AIRPARK
Kind of flying
CA
Weather at impact
Sky
CLEAR
Aircraft history
Total time
2,292 hrs
Pilot
Certificate
Flight instructor (CFI)
Total hours
24,949
Age
56
Probable cause (from PRE1982.MDB)
HE PRIMER TO BE IN AN UNLOCKED POSITION.
Investigator remarks
THE PRIMERS PACKING NUT HAD UNSCREWED ALLOWING T
Cause factors
- 74/C/CF C POWERPLANT PRIMING SYSTEM Cause
- 88/C/34 C MISCELLANEOUS ACTS,CONDITIONS ENGINE LOADED UP Cause
- 88/C/AV C MISCELLANEOUS ACTS,CONDITIONS LOOSE,PART/FITTING Cause
- 68/C/D6 C PERSONNEL INADEQUATE MAINTENANCE AND INSPECTION Cause
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 3186.
Source file
NTSB_1967_3_3186.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
Right in Time: Reactive Reasoning in Regulated Traffic Spaces
Exact inference in probabilistic First-Order Logic offers a promising yet computationally costly approach for regulating the behavior of autonomous agents in shared traffic spaces.
- Embry-Riddle Scholarly Commons 2025 · Journal article (IJAAA)
The Reasons for the Silence of First Officers: A Qualitative Study
This study explores the reasons why first officers choose to remain silent in the cockpit or refrain from reporting errors after a flight.
- Semantic Scholar 2024 · Article (BMC Medical Education)
Augmented reality visualization for ultrasound-guided interventions: a pilot randomized crossover trial to assess trainee performance and cognitive load
Augmented reality (AR) technology involving head-mounted displays (HMD) represents a significant innovation in medical education, particularly for training in guided invasive procedures.
- arXiv 2024 · arXiv preprint
Automatic Control With Human-Like Reasoning: Exploring Language Model Embodied Air Traffic Agents
Recent developments in language models have created new opportunities in air traffic control studies. The current focus is primarily on text and language-based use cases.
- Semantic Scholar 2024 · Article (The Ultrasound Journal)
Evaluation of point-of-care ultrasound training among healthcare providers: a pilot study
The use of Point-of-Care Ultrasound (POCUS) has become prevalent across a variety of clinical settings. Many healthcare professionals have started getting hands-on training.
- arXiv 2024 · arXiv preprint
Random Graph Set and Evidence Pattern Reasoning Model
Evidence theory is widely used in decision-making and reasoning systems. In previous research, Transferable Belief Model (TBM) is a commonly used evidential decision making model, but TBM is a non-pre…
Browse the full corpus — academia portal ↗