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

July 23, 2017 · Piper PA18S 150 · N4387A

Sterling, AK

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
July 23, 2017
Injury Outcomes
No injuries (2 uninjured)
Location
Sterling, AK
Aircraft
Piper PA18S 150 (1956)
Tail Number
N4387A
Injuries
None
Aircraft Damage
Substantial
NTSB Number
GAA17CA441

The pilot of the tailwheel-equipped airplane reported that, while landing in crosswind conditions and as the tailwheel set down, the airplane veered left. Subsequently, the airplane exited the left side of the runway, struck a well head, and came to rest nose down. The airplane sustained substantial damage to the fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The automated weather observation system about 7 nautical miles from the accident site reported that, about the time of the accident, the wind was from 280° at 11 knots. The pilot landed on runway 26.

NTSB Probable Cause

Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Directional control-Not attained/maintained - C

Full Narrative

The pilot of the tailwheel-equipped airplane reported that, while landing in crosswind conditions, as the tailwheel set down the airplane veered left. Subsequently, the airplane exited the left side of the runway, struck a well head and came to rest nose down. The airplane sustained substantial damage to the fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The automated weather observation system about 7 nautical miles from the accident site reported, about the time of the accident, the wind was 280° at 11 knots. The pilot landed on runway 26.

Flight

Event TypeAccident
Event Time11:10 AKDT
Nearest AirportScooter'S Landing Strip (0nm ESE)
Runway26
Runway Length2400 ft
Runway Width80 ft
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftPiper PA18S 150
Tail NumberN4387A
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320 · Reciprocating · 150
Seats2

People & Injuries

Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 54 · Third Class · None

Conditions

ConditionsVMC
LightDaylight
Wind280° @ 11 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point66 F / 54
Altimeter30.12 inHg
Observation Time18:56
Weather SourceWFAC

Appendix: Source Data