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

October 11, 1990 · Piper PA28-140 · N6660W

Hamilton, MT

Overview

Report Status
Probable Cause
Event Type
Accident
Date
October 11, 1990
Injury Outcomes
No injuries (2 uninjured)
Location
Hamilton, MT
Aircraft
Piper PA28-140
Tail Number
N6660W
Operator
Brandborg Daniel M
Injuries
None
Aircraft Damage
Substantial
NTSB Number
SEA91LA004

WHILE ON FINAL APPROACH FOR LANDING, THE AIRPLANE ENCOUNTERED A DOWNDRAFT. THE PILOT APPLIED POWER, HOWEVER, THE AIRPLANE COUNTINUED TO SINK AND STRUCK A TREE. THE AIRPLANE LANDED SHORT OF THE RUNWAY AND COLLIDED WITH A DITCH.

NTSB Probable Cause

THE PILOT'S INADEQUATE COMPENSATION FOR WIND CONDITIONS.

Full Narrative

WHILE ON FINAL APPROACH FOR LANDING, THE AIRPLANE ENCOUNTERED A DOWNDRAFT. THE PILOT APPLIED POWER, HOWEVER, THE AIRPLANE COUNTINUED TO SINK AND STRUCK A TREE. THE AIRPLANE LANDED SHORT OF THE RUNWAY AND COLLIDED WITH A DITCH.

Flight

Event TypeAccident
Event Time18:00 MDT
Nearest AirportRavalli Co. (0nm N)
Runway34
Runway Length4200 ft
Runway Width75 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftPiper PA28-140
Tail NumberN6660W
Aircraft CategoryAir
DamageSubstantial
OperatorBrandborg Daniel M
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320-E2A · Reciprocating · 150
Seats4

People & Injuries

Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 32 · Third Class

Conditions

ConditionsVMC
LightDaylight
Wind10 kt
Visibility50 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourcePILO

Appendix: Source Data