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

August 14, 1983 · Cessna 150 · N4446U

Granite Falls, WA

Overview

Report Status
Preliminary report
Event Type
Accident
Date
August 14, 1983
Injury Outcomes
1 injury (1 fatality)
Location
Granite Falls, WA
Aircraft
Cessna 150
Tail Number
N4446U
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
SEA83FA178

THE ACFT COLLIDED WITH THE GROUND IN A VERTICAL NOSE DOWN ATTITUDE. THE ENGINE WAS IMBEDDED 4 FT INTO THE GROUND. ALL COMPONENTS OF THE ACFT WERE ACCOUNTED FOR IN THE IMMEDIATE AREA OF THE IMPACT. WITNESSES OBSERVED THE ACFT IN A LEFT TURN BEFORE FALLING INTO A LEFT SPIN FOR 3/4 TURN AND STRIKING THE GROUND IN A VERTICAL ATTITUDE. A BURST OF ENGINE POWER WAS HEARD PRIOR TO IMPACT. A LOCAL PILOT WHO HAD FLOWN WITH THE OPERATOR IN THE ACCIDENT ACFT 2 WEEKS PRIOR TO THEMISHAP NOTED THAT THE AIRSPEED WAS READING ABOUT 15 MPH HIGH WITH INCIPIENT STALL CHARACTERISTICS NOTED WHEN AIRSPEED READINGS AS HIGH AS 70 MPH. THE OWNER STATED HE WOULD HAVE THE INSTRUMENT RECALIBRATED. NO EVIDENCE OF THIS WORK BEING DONE WAS FOUND.

Full Narrative

THE ACFT COLLIDED WITH THE GROUND IN A VERTICAL NOSE DOWN ATTITUDE. THE ENGINE WAS IMBEDDED 4 FT INTO THE GROUND. ALL COMPONENTS OF THE ACFT WERE ACCOUNTED FOR IN THE IMMEDIATE AREA OF THE IMPACT. WITNESSES OBSERVED THE ACFT IN A LEFT TURN BEFORE FALLING INTO A LEFT SPIN FOR 3/4 TURN AND STRIKING THE GROUND IN A VERTICAL ATTITUDE. A BURST OF ENGINE POWER WAS HEARD PRIOR TO IMPACT. A LOCAL PILOT WHO HAD FLOWN WITH THE OPERATOR IN THE ACCIDENT ACFT 2 WEEKS PRIOR TO THEMISHAP NOTED THAT THE AIRSPEED WAS READING ABOUT 15 MPH HIGH WITH INCIPIENT STALL CHARACTERISTICS NOTED WHEN AIRSPEED READINGS AS HIGH AS 70 MPH. THE OWNER STATED HE WOULD HAVE THE INSTRUMENT RECALIBRATED. NO EVIDENCE OF THIS WORK BEING DONE WAS FOUND.

Flight

Event TypeAccident
Event Time09:55 PDT
Nearest AirportGreen Valley (1nm SSW)
Runway18
Runway Length1325 ft
Runway Width50 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftCessna 150
Tail NumberN4446U
Aircraft CategoryAir
DamageDestroyed
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · O-200 · Reciprocating · 100
Seats2

People & Injuries

Injury Summary1 injury (1 fatality)
Fatal1
Serious0
Minor0
Uninjured0
Total1
Crew 1Age 27 · Second Class

Conditions

ConditionsVMC
LightDaylight
Wind190° @ 3 kt
Visibility30 sm
CeilingNone
Temperature / Dew Point70 F / 0 C
Altimeter0
Weather SourceWIT

External Links

Appendix: Source Data