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

January 31, 2010 · Piper PA-17 · N4568H

Skwentna, AK

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
January 31, 2010
Injury Outcomes
1 injury (1 minor injury)
Location
Skwentna, AK
Aircraft
Piper PA-17
Tail Number
N4568H
Operator
Ben Knapp
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
ANC10CA016

The private pilot reported that he was on a personal flight and was attempting to land on a frozen lake. While on final approach to land, he said the airplane encountered a wind gust and that the left wing struck the top of a tree. The airplane descended and collided with terrain short of the intended landing site. The pilot stated that there were no preaccident mechanical problems with the airplane.

NTSB Probable Cause

The pilot's decision to make a low-altitude approach to land over trees in gusting winds, which resulted in an in-flight collision with a tree and a loss of control.

Full Narrative

The private pilot reported that he was on a personal flight and was attempting to land on a frozen lake. While on final approach to land, he said the airplane encountered a wind gust and that the left wing struck the top of a tree. The airplane descended and collided with terrain short of the intended landing site. The pilot stated that there were no preaccident mechanical problems with the airplane.

Flight

Event TypeAccident
Event Time11:00 AKST
Nearest Airport0nm
Runway36
Flight Plan FiledUnknown
Aircraft FireNo

Aircraft

AircraftPiper PA-17
Tail NumberN4568H
Aircraft CategoryAir
DamageSubstantial
OperatorBen Knapp
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsCont Motor · C90 · Reciprocating · 90
Seats2

People & Injuries

Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 21 · Third Class · Minor

Conditions

ConditionsVMC
LightDaylight
WindCalm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0

Appendix: Source Data