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
December 20, 1985 · Cessna 172N · N7609F
Longmont, CO
Overview
Report Status
Preliminary report
Event Type
Accident
Date
December 20, 1985
Injury Outcomes
No injuries (1 uninjured)
Location
Longmont, CO
Aircraft
Cessna 172N
Tail Number
N7609F
Injuries
None
Aircraft Damage
Substantial
NTSB Number
DEN86LA051
ACCORDING TO THE STUDENT PLT HE MADE A NORMAL APCH TO LANDING. THE RUNWAY HAD NOT BEEN CLEARED OF SNOW TO ITS FULL WIDTH. THE ACFT'S LEFT WHEEL TOUCHED THE SNOW PULLING THE ACFT OFF THE RWY AND THE ACFT FLIPPED OVER.
Full Narrative
ACCORDING TO THE STUDENT PLT HE MADE A NORMAL APCH TO LANDING. THE RUNWAY HAD NOT BEEN CLEARED OF SNOW TO ITS FULL WIDTH. THE ACFT'S LEFT WHEEL TOUCHED THE SNOW PULLING THE ACFT OFF THE RWY AND THE ACFT FLIPPED OVER.
Flight
Event TypeAccident
Event Time08:30 MST
Nearest AirportLongmont Municipal (0nm N)
Runway29
Runway Length4200 ft
Runway Width60 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 172N
Tail NumberN7609F
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320-H2AD · Reciprocating · 150
Seats4
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 19 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind320° @ 5 kt, gusting 10 kt
Visibility50 sm
CeilingNone
Temperature / Dew Point27 C / 0 C
Altimeter0
Observation Time07:30
Weather SourceWIT