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
Featured Report

Loading…

Loading featured report…

Loading…
Open 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…

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 manufacturers

Airports

More airports

Operators

More operators

About

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

September 6, 1984 · Cessna 140 · N77271

Butte, MT

Overview

Report Status
Preliminary report
Event Type
Accident
Date
September 6, 1984
Injury Outcomes
No injuries (2 uninjured)
Location
Butte, MT
Aircraft
Cessna 140
Tail Number
N77271
Injuries
None
Aircraft Damage
Substantial
NTSB Number
DEN84LA283

THE PLT TAXIED TO RWY 11 AND GOT OUT OF THE ACFT TO CHECK THE WIND. THE RWY LIGHTS WERE NOT OPERATING AT THE TIME. THE PILOT DECIDED THAT RWY 11 WAS THE MOST FAVORABLE RWY AND THE TAKEOFF WAS ATTEMPTED. THE WIND CONDITIONS AT THE TIME OFF THE ACCIDENT WERE FAVORING RWY 20. THE PILOT ELECTED TO ABORT THE TAKEOFF BECAUSE DURING THE GROUND RUN HE FELT THE WIND 'PUSHING HARD ON THE ACFT AND IT DIDN'T FEEL RIGHT.' IN HIS ATTEMPT TO STOP, THE ACFT RAN OFF THE LEFT SIDE OF THE RWY AND THE LEFT LANDING GEAR COLLAPSED.

Full Narrative

THE PLT TAXIED TO RWY 11 AND GOT OUT OF THE ACFT TO CHECK THE WIND. THE RWY LIGHTS WERE NOT OPERATING AT THE TIME. THE PILOT DECIDED THAT RWY 11 WAS THE MOST FAVORABLE RWY AND THE TAKEOFF WAS ATTEMPTED. THE WIND CONDITIONS AT THE TIME OFF THE ACCIDENT WERE FAVORING RWY 20. THE PILOT ELECTED TO ABORT THE TAKEOFF BECAUSE DURING THE GROUND RUN HE FELT THE WIND 'PUSHING HARD ON THE ACFT AND IT DIDN'T FEEL RIGHT.' IN HIS ATTEMPT TO STOP, THE ACFT RAN OFF THE LEFT SIDE OF THE RWY AND THE LEFT LANDING GEAR COLLAPSED.

Flight

Event TypeAccident
Event Time22:48 MDT
Nearest AirportBert Mooney-Silver Bow Co (0nm N)
Runway11
Runway Length5101 ft
Runway Width75 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftCessna 140
Tail NumberN77271
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · C-85-12 · Reciprocating · 85
Seats2

People & Injuries

Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 36 · Second Class

Conditions

ConditionsVMC
LightDark Night
Wind210° @ 17 kt
Visibility20 sm
CeilingBroken clouds 10000 ft
Temperature / Dew Point64 F / 43 C
Altimeter29.00 inHg
Observation Time04:54
Weather SourcePILO

Appendix: Source Data