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

June 9, 1993 · Enstrom 280C · N51739

Glen Mills, PA

Overview

Report Status
Probable Cause
Event Type
Accident
Date
June 9, 1993
Injury Outcomes
No injuries (1 uninjured)
Location
Glen Mills, PA
Aircraft
Enstrom 280C
Tail Number
N51739
Operator
Horizon Helicopters
Injuries
None
Aircraft Damage
Substantial
NTSB Number
NYC93LA109

THE PILOT INITIATED AN APPROACH TO A GRASS FIELD. WHEN HE APPLIED POWER TO FLARE, HE WAS UNABLE TO STOP THE DESCENT AND MADE A HARD LANDING. THE MAIN ROTOR BLADES CUT THE TAIL BOOM OFF OF THE HELICOPTER. POST ACCIDENT EXAMINATION OF THE HELICOPTER BY THE FAA FAILED TO FIND ANY EVIDENCE OF A MECHANICAL FAILURE OR MALFUNCTION.

NTSB Probable Cause

AN IMPROPERLY PLANNED APPROACH IN WHICH THE FLARE WAS NOT ATTAINED, AND WHICH RESULTED IN A HARD LANDING.

Full Narrative

THE PILOT INITIATED AN APPROACH TO A GRASS FIELD. WHEN HE APPLIED POWER TO FLARE, HE WAS UNABLE TO STOP THE DESCENT AND MADE A HARD LANDING. THE MAIN ROTOR BLADES CUT THE TAIL BOOM OFF OF THE HELICOPTER. POST ACCIDENT EXAMINATION OF THE HELICOPTER BY THE FAA FAILED TO FIND ANY EVIDENCE OF A MECHANICAL FAILURE OR MALFUNCTION.

Flight

Event TypeAccident
Event Time12:45 EDT
Nearest AirportGlen Mills (0nm)
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftEnstrom 280C
Tail NumberN51739
Aircraft CategoryHeli
DamageSubstantial
OperatorHorizon Helicopters
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · HIO-360-E1AD · Reciprocating · 205
Seats3

People & Injuries

Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 63 · Third Class

Conditions

ConditionsVMC
LightDaylight
Wind220° @ 9 kt
Visibility5 sm
CeilingNone
Altimeter29.00 inHg
Weather SourcePILO

Appendix: Source Data