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 17, 1990 · Cessna 150 · N4020J

Two Harbors, MN

Overview

Report Status
Probable Cause
Event Type
Accident
Date
April 17, 1990
Injury Outcomes
1 injury (1 minor injury), 1 uninjured
Location
Two Harbors, MN
Aircraft
Cessna 150
Tail Number
N4020J
Operator
Calles Kenneth
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
MKC90LA089

SHORTLY AFTER TAKEOFF AT ABOUT 500 AGL, THE PVT PILOT SAID THAT HE EXPERIENCED A PARTIAL POWER LOSS. AN ATTEMPT TO LAND DOWNWIND ON THE RNWY, JUST DEPARTED, WAS CONSIDERED, BUT THE PLT FELT HE HAD EXCESSIVE ALTITUDE, SO HE FLEW DOWN WIND FOR LANDING ON THE DEPARTURE END. ON FINAL APPROACH, AND LEVELING OFF FOR TOUCH DOWN, THE ACFT SUDDENLY PITCHED NOSE DOWN AND COLLIDED WITH THE TERRAIN, SHORT OF THE RUNWAY. THE ACFT SKIDDED ABOUT 50 YARDS, NOSE DOWN BEFORE COMING TO REST. THE AIRPORTS PROXIMITY TO THE LAKE, THE TIME OF DAY, AND METEOROLOGICAL CONDITIONS WERE CONDUCIVE FOR CARBURETOR ICING AT THE TIME OF THE ACCIDENT.

NTSB Probable Cause

PILOT FACTOR IN THAT HE FAILED TO MAINTAIN FLYING SPEED.

Full Narrative

SHORTLY AFTER TAKEOFF AT ABOUT 500 AGL, THE PVT PILOT SAID THAT HE EXPERIENCED A PARTIAL POWER LOSS. AN ATTEMPT TO LAND DOWNWIND ON THE RNWY, JUST DEPARTED, WAS CONSIDERED, BUT THE PLT FELT HE HAD EXCESSIVE ALTITUDE, SO HE FLEW DOWN WIND FOR LANDING ON THE DEPARTURE END. ON FINAL APPROACH, AND LEVELING OFF FOR TOUCH DOWN, THE ACFT SUDDENLY PITCHED NOSE DOWN AND COLLIDED WITH THE TERRAIN, SHORT OF THE RUNWAY. THE ACFT SKIDDED ABOUT 50 YARDS, NOSE DOWN BEFORE COMING TO REST. THE AIRPORTS PROXIMITY TO THE LAKE, THE TIME OF DAY, AND METEOROLOGICAL CONDITIONS WERE CONDUCIVE FOR CARBURETOR ICING AT THE TIME OF THE ACCIDENT.

Flight

Event TypeAccident
Event Time16:30 CDT
Nearest AirportTwo Harbors (0nm N)
Runway24
Runway Length3301 ft
Runway Width75 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftCessna 150
Tail NumberN4020J
Aircraft CategoryAir
DamageSubstantial
OperatorCalles Kenneth
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · O-200-A · Reciprocating · 100
Seats2

People & Injuries

Injury Summary1 injury (1 minor injury), 1 uninjured
Fatal0
Serious0
Minor1
Uninjured1
Total2
Crew 1Age 59 · Third Class

Conditions

ConditionsVMC
LightDaylight
Wind300° @ 13 kt
Visibility15 sm
CeilingNone
Temperature / Dew Point45 C / 12 C
Altimeter30.00 inHg
Observation Time00:50
Weather SourceWFAC

External Links

Appendix: Source Data