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
July 29, 1993 · Cessna 172N · N734DL
Monroe, WA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 29, 1993
Injury Outcomes
1 injury (1 minor injury)
Location
Monroe, WA
Aircraft
Cessna 172N
Tail Number
N734DL
Operator
Duane O Kaasa
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
SEA93LA167
THE PILOT MADE AN APPROACH TO A ROW OF VEGETATION WHICH HE MISTOOK FOR THE RUNWAY WHILE ATTEMPTING TO LAND AT THE UNLIGHTED AIRPORT ON A DARK NIGHT. HE VEERED TOWARD THE RUNWAY AT A LOW ALTITUDE, ATTEMPTING TO LINE UP WITH THE RUNWAY, AND THE ACFT IMPACTED THE GROUND. THE PILOT HAD NO RECENT NIGHT FLT TIME.
NTSB Probable Cause
THE IMPROPER INFLIGHT DECISION BY THE PIC AND HIS FAILURE TO ATTAIN PROPER RUNWAY ALIGNMENT. FACTORS RELATING TO THE ACCIDENT WERE THE DARK NIGHT LIGHT CONDITIONS, UNAVAILABILITY OF RUNWAY LIGHTS, AND LACK OF RECENT NIGHT FLIGHT TIME BY THE PIC.
Full Narrative
THE PILOT MADE AN APPROACH TO A ROW OF VEGETATION WHICH HE MISTOOK FOR THE RUNWAY WHILE ATTEMPTING TO LAND AT THE UNLIGHTED AIRPORT ON A DARK NIGHT. HE VEERED TOWARD THE RUNWAY AT A LOW ALTITUDE, ATTEMPTING TO LINE UP WITH THE RUNWAY, AND THE ACFT IMPACTED THE GROUND. THE PILOT HAD NO RECENT NIGHT FLT TIME.
Flight
Event TypeAccident
Event Time21:30 PDT
Nearest AirportFirstair Field (0nm)
Runway7
Runway Length2092 ft
Runway Width34 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 172N
Tail NumberN734DL
Aircraft CategoryAir
DamageSubstantial
OperatorDuane O Kaasa
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320-H2AD · Reciprocating · 160
Seats4
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 52 · Third Class
Conditions
ConditionsVMC
LightDark Night
Wind130° @ 5 kt
Visibility10 sm
CeilingBroken clouds 1500 ft
Temperature / Dew Point61 F / 55
Altimeter29.00 inHg
Observation Time03:45
Weather SourceWFAC