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 5, 1991 · Sunrise Ultralight Spitfire II Spitfire I · UNREG

Elk Grove, CA

Overview

Report Status
Probable Cause
Event Type
Accident
Date
April 5, 1991
Injury Outcomes
2 injuries (2 serious injuries)
Location
Elk Grove, CA
Aircraft
Sunrise Ultralight Spitfire II Spitfire I
Tail Number
UNREG
Operator
William Nelson
Injuries
Serious
Aircraft Damage
Destroyed
NTSB Number
LAX91LA170

THE NON-CERTIFICATED OWNER OF A NON-CERTIFICATED, NON-REGISTERED AIRPLANE, AND A NON-CERTIFICATED PASSENGER WERE MANEUVERING TO LAND AT AN AIRPORT DURING A FLIGHT IN WHICH THE PASSENGER WAS REPORTEDLY TEACHING THE OWNER HOW TO FLY. THE AIRPLANE WAS OBSERVED TO STALL AND DESCEND TO THE GROUND IN A RIGHT TURN FROM AN ALTITUDE OF ABOUT 150 FEET ABOVE THE GROUND. BOTH OCCUPANTS RECEIVED SERIOUS INJURIES. THE AIRPLANE IS SIMILAR TO AN ULTRALIGHT VEHICLE BUT DOES NOT MEET THE ULTRALIGHT DEFINITION. BOTH OCCUPANTS DO NOT POSSESS AIRMAN OR MEDICAL CERTIFICATES.

NTSB Probable Cause

THE FAILURE OF THE OPERATOR TO MAINTAIN ADEQUATE AIRSPEED.

Full Narrative

THE NON-CERTIFICATED OWNER OF A NON-CERTIFICATED, NON-REGISTERED AIRPLANE, AND A NON-CERTIFICATED PASSENGER WERE MANEUVERING TO LAND AT AN AIRPORT DURING A FLIGHT IN WHICH THE PASSENGER WAS REPORTEDLY TEACHING THE OWNER HOW TO FLY. THE AIRPLANE WAS OBSERVED TO STALL AND DESCEND TO THE GROUND IN A RIGHT TURN FROM AN ALTITUDE OF ABOUT 150 FEET ABOVE THE GROUND. BOTH OCCUPANTS RECEIVED SERIOUS INJURIES. THE AIRPLANE IS SIMILAR TO AN ULTRALIGHT VEHICLE BUT DOES NOT MEET THE ULTRALIGHT DEFINITION. BOTH OCCUPANTS DO NOT POSSESS AIRMAN OR MEDICAL CERTIFICATES.

Flight

Event TypeAccident
Event Time09:59 PST
Nearest Airport0nm
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftSunrise Ultralight Spitfire II Spitfire I
Tail NumberUNREG
Aircraft CategoryAir
DamageDestroyed
OperatorWilliam Nelson
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsBombardier · ROTEX 503 · Reciprocating · 52
Seats2

People & Injuries

Injury Summary2 injuries (2 serious injuries)
Fatal0
Serious2
Minor0
Uninjured0
Total2
Crew 1None

Conditions

ConditionsVMC
LightDaylight
Wind150° @ 10 kt
Visibility40 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourceWIT

Appendix: Source Data