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
April 4, 1991 · Cessna 180F · N2117Z
Yukon River, AK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
April 4, 1991
Injury Outcomes
No injuries (2 uninjured)
Location
Yukon River, AK
Aircraft
Cessna 180F
Tail Number
N2117Z
Operator
James E Carner
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC91LA047
ACCORDING TO THE PILOT, DURING CRUISE FLIGHT, THE ENGINE BEGAN BACKFIRING AND WOULD ONLY PRODUCE IDLE POWER. HE WAS FORCED TO LAND ON THE FROZEN YOKON RIVER AND THE AIRPLANE NOSED OVER. SUBSEQUENT EXAMINATION OF THE AIRPLANE AND ENGINE REVEALED THAT THE CARBURETOR FLOAT BOWL DRAIN PLUG WAS NOT INSTALLED AND COULD NOT BE LOCATED. THE AIRPLANE HAD RECEIVED AN ANNUAL INSPECTION ONLY 1.5 HOURS OF FLIGHT TIME EARLIER.
NTSB Probable Cause
A CARBURETOR FUEL LEAK DUE TO INADEQUATE ANNUAL INSPECTION. CONTRIBUTING TO THE ACCIDENT WAS THE SNOW COVERED TERRAIN.
Full Narrative
ACCORDING TO THE PILOT, DURING CRUISE FLIGHT, THE ENGINE BEGAN BACKFIRING AND WOULD ONLY PRODUCE IDLE POWER. HE WAS FORCED TO LAND ON THE FROZEN YOKON RIVER AND THE AIRPLANE NOSED OVER. SUBSEQUENT EXAMINATION OF THE AIRPLANE AND ENGINE REVEALED THAT THE CARBURETOR FLOAT BOWL DRAIN PLUG WAS NOT INSTALLED AND COULD NOT BE LOCATED. THE AIRPLANE HAD RECEIVED AN ANNUAL INSPECTION ONLY 1.5 HOURS OF FLIGHT TIME EARLIER.
Flight
Event TypeAccident
Event Time11:00 AKST
Nearest Airport0nm
Runway0
Flight Plan FiledVFR
Aircraft FireGrd
Aircraft ExplosionNo
Aircraft
AircraftCessna 180F
Tail NumberN2117Z
Aircraft CategoryAir
DamageSubstantial
OperatorJames E Carner
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · O-470-R · Reciprocating · 230
Seats4
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 62 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind90° @ 5 kt
Visibility40 sm
CeilingNone
Temperature / Dew Point19 C / 0 C
Altimeter0
Weather SourcePILO