Overall Trends
Total, fatal, and serious accidents in the selected range.
Premium research interface
The modern interface for aviation safety intelligence.
Search investigations, review source evidence, monitor watched reports, and trace long-term patterns from one calm, data-first workspace.
63k+
Reports indexed
1940-2026
Coverage
Recent
Last data refresh
Search everything
Fast key and full-text search with live filters, watches, and precise metadata.
Use quotes for exact phrase matches (for example "fuel selector valve").
Featured Report
Safety trends by operating rule
Track fatal and non-fatal accident patterns across Part 91, Part 135, and Part 121 operations.
Loading trend charts…
High-signal investigations
Major cases, deep-report coverage, and investigation media across decades of NTSB history.
Browse the aviation graph
Move quickly by aircraft, airport, operator, and time with indexes built for research, not wandering.
Last Data Update
By Decade
By Month
Aircraft Manufacturer
More manufacturersAirports
More airportsOperators
More operatorsAbout
Aviation safety reports, made easier to study
NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.
The goal is practical safety education: make it faster to find relevant investigations, compare similar events, review factual records, and understand the evidence behind probable-cause and preliminary reports.
The investigative work and source records belong to the National Transportation Safety Board and the published investigation record. This site is not affiliated with or endorsed by the NTSB.
FAQs
NTSB Report
April 20, 1989 · Donner/Parton AVID Flyer · N4409D
Stanwood, WA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
April 20, 1989
Injury Outcomes
No injuries (2 uninjured)
Location
Stanwood, WA
Aircraft
Donner/Parton AVID Flyer
Tail Number
N4409D
Operator
Terry L Botteron
Injuries
None
Aircraft Damage
Substantial
NTSB Number
SEA89LA073
DURING FLIGHT, THERE WAS A LOSS OF POWER FROM ONE OF THE CYLINDERS OF THE AIRCRAFT'S TWO CYLINDER ENGINE. WITH INSUFFICIENT POWER TO CONTINUE FLIGHT, THE PILOT TRIED TO LAND IN A SOD FIELD. HOWEVER, THE AIRCRAFT TOUCHED DOWN IN A PLOWED FIELD, SHORT OF THE INTENDED LANDING AREA, AND NOSED OVER. THE PILOT BELIEVED THAT ONE OF THE SPARK PLUG LEADS MAY HAVE BECOME DISCONNECTED.
NTSB Probable Cause
AN IGNITION LEAD BECAME DISCONNECTED FROM ONE CYLINDER, WHICH RESULTED IN A PARTIAL POWER LOSS. A FACTOR RELATED TO THE ACCIDENT WAS: SOFT TERRAIN IN THE TOUCHDOWN AREA.
Full Narrative
DURING FLIGHT, THERE WAS A LOSS OF POWER FROM ONE OF THE CYLINDERS OF THE AIRCRAFT'S TWO CYLINDER ENGINE. WITH INSUFFICIENT POWER TO CONTINUE FLIGHT, THE PILOT TRIED TO LAND IN A SOD FIELD. HOWEVER, THE AIRCRAFT TOUCHED DOWN IN A PLOWED FIELD, SHORT OF THE INTENDED LANDING AREA, AND NOSED OVER. THE PILOT BELIEVED THAT ONE OF THE SPARK PLUG LEADS MAY HAVE BECOME DISCONNECTED.
Flight
Event TypeAccident
Event Time09:30 PDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftDonner/Parton AVID Flyer
Tail NumberN4409D
Aircraft CategoryAir
DamageSubstantial
OperatorTerry L Botteron
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsCuyuna · 430R · Reciprocating · 43
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 52 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind135° @ 10 kt, gusting 20 kt
Visibility15 sm
CeilingNone
Temperature / Dew Point55 / 0 C
Altimeter0
Weather SourcePILO