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

September 26, 1991 · Bell 47G-5A · N59424

Pearsall, TX

Overview

Report Status
Probable Cause
Event Type
Accident
Date
September 26, 1991
Injury Outcomes
3 injuries (3 minor injuries)
Location
Pearsall, TX
Aircraft
Bell 47G-5A
Tail Number
N59424
Operator
Tiller Helicopter Service
Injuries
Minor
Aircraft Damage
Destroyed
NTSB Number
FTW91LA166

PILOT WAS ON A POWER LINE PATROL FLIGHT AND HAD LANDED IN AN AREA NEAR A ROAD TO REFUEL FROM THE OPERATOR'S TRUCK PRIOR TO THE LAST LEG OF THE DAY. DURING THE INITIAL CLIMB AFTER TAKEOFF, THE SKIDS STRUCK POWER LINES HE HAD NOT OBSERVED DURING THE APPROACH OR TAKEOFF. FOLLOWING THE WIRE STRIKE THE AIRCRAFT NOSED OVER, IMPACTED THE GROUND, AND WAS DESTROYED DURING A POST-CRASH FIRE.

NTSB Probable Cause

THE PILOT'S FAILURE TO MAINTAIN ADEQUATE VISUAL LOOKOUT FOR OBSTACLES DURING OPERATIONS FROM A REMOTE SITE.

Full Narrative

PILOT WAS ON A POWER LINE PATROL FLIGHT AND HAD LANDED IN AN AREA NEAR A ROAD TO REFUEL FROM THE OPERATOR'S TRUCK PRIOR TO THE LAST LEG OF THE DAY. DURING THE INITIAL CLIMB AFTER TAKEOFF, THE SKIDS STRUCK POWER LINES HE HAD NOT OBSERVED DURING THE APPROACH OR TAKEOFF. FOLLOWING THE WIRE STRIKE THE AIRCRAFT NOSED OVER, IMPACTED THE GROUND, AND WAS DESTROYED DURING A POST-CRASH FIRE.

Flight

Event TypeAccident
Event Time16:20 CDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireGrd
Aircraft ExplosionGrd

Aircraft

AircraftBell 47G-5A
Tail NumberN59424
Aircraft CategoryHeli
DamageDestroyed
OperatorTiller Helicopter Service
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · VO-435-B1A · Reciprocating · 260
Seats3

People & Injuries

Injury Summary3 injuries (3 minor injuries)
Fatal0
Serious0
Minor3
Uninjured0
Total3
Crew 1Age 45 · Second Class

Conditions

ConditionsVMC
LightDaylight
Wind335° @ 10 kt, gusting 15 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point0 C
Altimeter0
Weather SourcePILO

Appendix: Source Data