NTSB Reports
Aviation Safety Intelligence
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.

Get the iPhone App
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 4, 2008 · Bardouche QUAD CITY Ultralight · N423V

Pulaski, WI

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
April 4, 2008
Injury Outcomes
1 injury (1 minor injury)
Location
Pulaski, WI
Aircraft
Bardouche QUAD CITY Ultralight
Tail Number
N423V
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
CHI08CA114

The pilot reported that during cruise flight, about 700 feet above the ground, the engine lost power. He stated that he attempted to troubleshoot the power loss to no avail. He then selected a landing site, but did not have sufficient altitude and landed the airplane in trees. The airplane came to rest in the tree tops and had sustained substantial damage due to the impact with the trees. Examination of the engine subsequent to the accident revealed that the spark plug had fallen out of its threaded hole. Examination of the threads revealed that they were loose and had been re-cut at some time in the past.

NTSB Probable Cause

The loss of engine power during cruise due to the separation of the spark plug because of the loose threads. Contributing to the accident was trees.

Full Narrative

The pilot reported that during cruise flight, about 700 feet above the ground, the engine lost power. He stated that he attempted to troubleshoot the power loss to no avail. He then selected a landing site, but did not have sufficient altitude and landed the airplane in trees. The airplane came to rest in the tree tops and had sustained substantial damage due to the impact with the trees. Examination of the engine subsequent to the accident revealed that the spark plug had fallen out of its threaded hole. Examination of the threads revealed that they were loose and had been re-cut at some time in the past.

Flight

Event TypeAccident
Event Time12:00 CDT
Nearest Airport0nm
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftBardouche QUAD CITY Ultralight
Tail NumberN423V
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsRotax · 503 · Reciprocating

People & Injuries

Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 76 · None · Minor

Conditions

ConditionsVMC
LightDaylight
Wind220°
Visibility6 sm
CeilingBroken clouds 10000 ft
Temperature / Dew Point50 / 0 C
Altimeter0
Weather SourcePILO

External Links

Appendix: Source Data