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

March 27, 1990 · Cessna 180J · N52104

Lake Nikabuno, AK

Overview

Report Status
Probable Cause
Event Type
Accident
Date
March 27, 1990
Injury Outcomes
No injuries (2 uninjured)
Location
Lake Nikabuno, AK
Aircraft
Cessna 180J
Tail Number
N52104
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC90LA044

THE PILOT REPORTED THAT HE WAS ATTEMPTING TO TAKE OFF FROM A FROZEN LAKE COVERED WITH WET, SOFT SNOW. HE SAID THAT THE TAKEOFF ROLL TOOK LONGER THAN ANTICIPATED, AND THAT SHORTLY AFTER BECOMING AIRBORNE, THE AIRPLANE'S LEFT MAIN LANDING GEAR WHEEL SKI STRUCK A SNOW BERM, CAUSING SUBSTANTIAL DAMAGE TO THE AIRPLANE STRUCTURE.

NTSB Probable Cause

THE PILOT'S SELECTION OF UNSUITABLE TERRAIN FOR TAKEOFF.

Full Narrative

THE PILOT REPORTED THAT HE WAS ATTEMPTING TO TAKE OFF FROM A FROZEN LAKE COVERED WITH WET, SOFT SNOW. HE SAID THAT THE TAKEOFF ROLL TOOK LONGER THAN ANTICIPATED, AND THAT SHORTLY AFTER BECOMING AIRBORNE, THE AIRPLANE'S LEFT MAIN LANDING GEAR WHEEL SKI STRUCK A SNOW BERM, CAUSING SUBSTANTIAL DAMAGE TO THE AIRPLANE STRUCTURE.

Flight

Event TypeAccident
Event Time08:30 AKST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftCessna 180J
Tail NumberN52104
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · O-470 · Reciprocating · 230
Seats4

People & Injuries

Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 42 · Second Class

Conditions

ConditionsVMC
LightDaylight
Wind125° @ 12 kt, gusting 18 kt
Visibility25 sm
CeilingBroken clouds 8000 ft
Temperature / Dew Point37 C / 0 C
Altimeter0
Weather SourcePILO

Appendix: Source Data