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

April 1, 1990 · Cessna 421-C · N2655V

Boulder, CO

Overview

Report Status
Probable Cause
Event Type
Accident
Date
April 1, 1990
Injury Outcomes
2 injuries (2 fatalities), 1 unknown outcome
Location
Boulder, CO
Aircraft
Cessna 421-C
Tail Number
N2655V
Operator
Rocky Mountain Intensive
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
DEN90FA085

THE AIRPLANE WAS OBSERVED FLYING ERRATICALLY AT A LOW ALTITUDE, THEN ENTER A LEFT WING, NOSE LOW ATTITUDE, IMPACTING THE GROUND IN A RESIDENTIAL AREA. AUTOPSIES ON BOTH OCCUPANTS INCLUDED FINDINGS OF MASSIVE TRAUMATIC INJURIES SUSTAINED DURING A STRUGGLE. THE PASSENGER REPORTEDLY PLANNED TO TAKE HIS LIFE BY JUMPING OUT OF AN AIRPLANE OVER THE MOUNTAINS OF COLORADO BECAUSE HE BELIEVED HE HAD AN INOPERABLE BRAIN TUMOR.

NTSB Probable Cause

A LOSS OF AIRPLANE CONTROL AS A RESULT CONTROL INTERFERENCE BY THE PASSENGER FOLLOWING A STRUGGLE BETWEEN THE PILOT AND THE PASSENGER.

Full Narrative

THE AIRPLANE WAS OBSERVED FLYING ERRATICALLY AT A LOW ALTITUDE, THEN ENTER A LEFT WING, NOSE LOW ATTITUDE, IMPACTING THE GROUND IN A RESIDENTIAL AREA. AUTOPSIES ON BOTH OCCUPANTS INCLUDED FINDINGS OF MASSIVE TRAUMATIC INJURIES SUSTAINED DURING A STRUGGLE. THE PASSENGER REPORTEDLY PLANNED TO TAKE HIS LIFE BY JUMPING OUT OF AN AIRPLANE OVER THE MOUNTAINS OF COLORADO BECAUSE HE BELIEVED HE HAD AN INOPERABLE BRAIN TUMOR.

Flight

Event TypeAccident
Event Time15:40 MDT
Nearest Airport0nm N
Runway0
Flight Plan FiledVFR
Aircraft FireGrd
Aircraft ExplosionNo

Aircraft

AircraftCessna 421-C
Tail NumberN2655V
Aircraft CategoryAir
DamageDestroyed
OperatorRocky Mountain Intensive
Operating RulePart 135
Engines2
Engine TypeReciprocating
Engine DetailsContinental · GTSIO-520L · Reciprocating · 375
Seats8

People & Injuries

Injury Summary2 injuries (2 fatalities), 1 unknown outcome
Fatal2
Serious0
Minor0
Uninjured0
Total3
Crew 1Age 57 · Second Class

Conditions

ConditionsVMC
LightDaylight
Wind40° @ 10 kt
Visibility30 sm
CeilingNone
Temperature / Dew Point48 / 0 C
Altimeter30.00 inHg
Observation Time23:45
Weather SourceWFAC

Appendix: Source Data