NTSB CAROL · Event
Event SEA89FA104
Aircraft involved
Probable cause & findings
INADEQUATE MAINTENANCE BY THE PILOT/OWNER/BUILDER, HIS OPERATION OF THE AIRCRAFT WITH A KNOWN DEFICIENCY, AND HIS FAILURE TO MAINTAIN ADEQUATE AIRSPEED DURING AN EMERGENCY DESCENT, WHICH RESULTED IN AN INADVERTENT STALL.
Factual narrative
THE HOMEBUILT ACFT WAS ON ITS INITIAL TEST FLT, WHEN IT CRASHED. SVRL PSNL RPRTD THAT BEFORE THE FLT, ENG PROBLEMS HAD BEEN EXPERIENCED. RPRTDLY, THERE HAD BEEN PROBLEMS WITH THE MIXTURE CONTROL SYS & THE ENG HAD BEEN OVERHEATING. ONE WITNESS NOTED THE ENG HAD STOPPED RUNNING 2 TIMES AS THE PLT WAS TAXIING TO TAKE OFF. BOTH TIMES, IT WAS RESTARTED AFTERMANY 'CRANKS' OR 'SPINS OF THE PROP.' ALSO, THE WITNESS NOTED THAT WHILE THE PLT WAS WAITING FOR ANOTHER ACFT TO DEPART, THE 'ENGINE WAS RUNNING AT HIGH RPM IN ORDER (HE PRESUMED) TO KEEP IT GOING.' AFTER TAKEOFF, THE ACFT REMAINED AT LOW ALT, TURNED NORTH, THEN ENTERED A WIDE TURN TO THE SOUTH. TWR PSNL NOTED THE ACFT BEGAN DSCNDG, THEN ENTERED A STEEP DSCNT & DISAPPEARED BEHIND TREES. SUBSEQUENTLY, IT IMPACTED IN A BAY ABT 2 MI WEST OF THE ARPT. AFTER THE WRECKAGEWAS RETRIEVED, NO APPARENT PREIMPACT STRUCTURAL FAILURE OF THE ENG OR ACCESSORIES WAS FOUND. SOOT/DARK DISCOLORATION WERE FOUND INSIDE THE ENG COMPARTMENT, BUT A FIRE HAD OCCURRED IN THAT AREA ABT 1 YEAR BFR THE ACDNT. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1989_SEA89FA104.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, maintenance). 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 2023 · Conference paper
The Value of Strong Partnerships to Build a Successful Aviation Maintenance Career Pathway Program for Transitioning Military Service Members
The aerospace industry is competing with other industries for a qualified workforce, and many of those competing industries are investing heavily in creating workforce development pipelines.
- Embry-Riddle Scholarly Commons 2026 · Journal article (IJAAA)
From Reactive to Predictive: A hybrid Trust-Mediated Adoption Framework for Data-Driven Maintenance in Distributed-Authority Aviation Environments
Modern aviation maintenance operates within increasingly data-intensive technological environments, yet the operational integration of predictive maintenance into routine decision-making remains incon…
- 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 …
- Semantic Scholar 2025 · Article (Applied Sciences)
Decision-Making Framework for Aviation Safety in Predictive Maintenance Strategies
The implementation of predictive maintenance (PM) in aviation presents unique challenges due to strict safety requirements, complex operational environments, and regulatory constraints.
- Embry-Riddle Scholarly Commons 2024 · Journal article (JAAER)
Low-Resource Automatic Speech Recognition Domain Adaptation – A Case-Study in Aviation Maintenance
With timeliness and efficiency being critical in the aviation maintenance industry, the need has been growing for smart technological solutions that optimize and streamline the different underlying ta…
- Embry-Riddle Scholarly Commons 2024 · Journal article (JAAER)
A New Trajectory in UAV Safety: Leveraging Reinforcement Learning for Distance Maintenance Under Wind Variations
In the field of aviation, safety is a critical cornerstone, and the operation of Unmanned Aerial Vehicle (UAV) systems is deeply connected with this principle.
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