Overall Trends
Total, fatal, and serious accidents in the selected range.
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
Search everything
Fast key and full-text search with live filters, watches, and precise metadata.
Use quotes for exact phrase matches (for example "fuel selector valve").
Featured 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…
High-signal investigations
Major cases, deep-report coverage, and investigation media across decades of NTSB history.
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 manufacturersAirports
More airportsOperators
More operatorsAbout
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 27, 2011 · Robinson Helicopter R44 · N982DH
Clearwater, FL
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
September 27, 2011
Injury Outcomes
1 injury (1 minor injury), 1 uninjured
Location
Clearwater, FL
Aircraft
Robinson Helicopter R44
Tail Number
N982DH
Operator
Razor Blades Helicopters
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
ERA11CA505
The certified flight instructor (CFI) stated that she had relocated the helicopter from a dolly to the taxiway in order for the student to conduct the takeoff from the taxiway. The student pilot took control of the helicopter and lifted the collective, and the helicopter began to roll to the right. The CFI stated that she lowered the collective and applied left cyclic, but the helicopter continued to roll to the right. The helicopter came to rest on its right side and sustained substantial damage to the tailboom. The CFI reported there were no mechanical malfunctions or anomalies with the helicopter.
NTSB Probable Cause
The certified flight instructor's delayed remedial action, which resulted in a loss of control and subsequent rollover.
Full Narrative
The certified flight instructor (CFI) stated that she had relocated the helicopter from a dolly to the taxiway in order for the student to conduct the takeoff from the taxiway. The student pilot took control of the helicopter and lifted the collective, and the helicopter began to roll to the right. The CFI stated that she lowered the collective and applied left cyclic, but the helicopter continued to roll to the right. The helicopter came to rest on its right side and sustained substantial damage to the tail boom. The CFI reported there were no mechanical malfunctions or anomalies with the helicopter.
Flight
Event TypeAccident
Event Time16:15 EDT
Nearest AirportSt. Petersburg-Clearwater Intl (0nm)
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftRobinson Helicopter R44
Tail NumberN982DH
Aircraft CategoryHeli
DamageSubstantial
OperatorRazor Blades Helicopters
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · 0-540 SERIES · Reciprocating · 245
Seats4
People & Injuries
Injury Summary1 injury (1 minor injury), 1 uninjured
Fatal0
Serious0
Minor1
Uninjured1
Total2
Crew 1Age 28 · Second Class · Minor
Crew 2Age 53 · Second Class · None
Conditions
ConditionsVMC
LightDaylight
Wind320° @ 10 kt
Visibility10 sm
CeilingNone
Altimeter29.90 inHg
Observation Time19:53
Weather SourceWFAC