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
June 19, 1984 · Rockwell 100-180 · N4085X
Franktown, CO
Overview
Report Status
Preliminary report
Event Type
Accident
Date
June 19, 1984
Injury Outcomes
1 injury (1 fatality)
Location
Franktown, CO
Aircraft
Rockwell 100-180
Tail Number
N4085X
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
DEN84FA188
THE PLT ATTEMPTED TO TAKEOFF DOWNWIND (WIND 310 DEGREES @22 KNOTS) WITH A DENSITY ALTITUDE CALCULATED TO BE 9190 FT MSL. ACCORDING TO THE ACFT MANUFACTURER, THE ACFT WOULD REQUIRE 2,535 FT FOR A GROUND RUN. RWY 17, A GRASS STRIP USED FOR THE TAKEOFF WAS 1800 FT LONG. WITNESSES STATED THAT THE ACFT BECAME AIRBORNE AND CLIMBED TO AN ALT OF 25 FT BEFORE THE RIGHT WING DIPPED AND THE ACFT DISAPPEARED OFF THE END OF THE RWY AND COLLIDED WITH TREES.
Full Narrative
THE PLT ATTEMPTED TO TAKEOFF DOWNWIND (WIND 310 DEGREES @22 KNOTS) WITH A DENSITY ALTITUDE CALCULATED TO BE 9190 FT MSL. ACCORDING TO THE ACFT MANUFACTURER, THE ACFT WOULD REQUIRE 2,535 FT FOR A GROUND RUN. RWY 17, A GRASS STRIP USED FOR THE TAKEOFF WAS 1800 FT LONG. WITNESSES STATED THAT THE ACFT BECAME AIRBORNE AND CLIMBED TO AN ALT OF 25 FT BEFORE THE RIGHT WING DIPPED AND THE ACFT DISAPPEARED OFF THE END OF THE RWY AND COLLIDED WITH TREES.
Flight
Event TypeAccident
Event Time12:30 MDT
Nearest AirportKostroski (0nm N)
Runway17
Runway Length1800 ft
Runway Width150 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftRockwell 100-180
Tail NumberN4085X
Aircraft CategoryAir
DamageDestroyed
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-360-A2F · Reciprocating · 180
Seats4
People & Injuries
Injury Summary1 injury (1 fatality)
Fatal1
Serious0
Minor0
Uninjured0
Total1
Crew 1Age 53 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind320° @ 22 kt
Visibility50 sm
CeilingBroken clouds 8000 ft
Temperature / Dew Point39 C
Altimeter30.00 inHg
Observation Time18:45
Weather SourceWFAC