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
January 3, 2019 · Robinson R44 II · N4246Z
Grace, ID
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
January 3, 2019
Injury Outcomes
No injuries (1 uninjured)
Location
Grace, ID
Aircraft
Robinson R44 II (2009)
Tail Number
N4246Z
Injuries
None
Aircraft Damage
Substantial
NTSB Number
GAA19CA110
The helicopter pilot reported that, shortly after liftoff to the north from his property, he saw coyote tracks and "wanted to inspect." To better observe the coyote, he maneuvered at a low altitude, which led him to cross over a power line. After crossing the power line for a third time, he spotted the coyote, turned left, diverted his attention from the power line, continued to turn left, and the main rotor blades struck the power line. He maintained control of the helicopter and landed without further incident. The helicopter sustained substantial damage to the main rotor blades. The pilot reported that there were no preimpact mechanical failures or malfunctions with the helicopter that would have precluded normal operation.
NTSB Probable Cause
Environmental issues-Physical environment-Object/animal/substance-Wire-Effect on equipment
Full Narrative
The helicopter pilot reported that shortly after liftoff to the north from his property, he observed coyote tracks and "wanted to inspect." To better observe the coyote, he maneuvered at a low altitude which led him to cross over a powerline. After crossing the powerline for a third time, he spotted the coyote, turned left, took his attention off the power line, continued to turn left and the main rotor blades struck the powerline. He maintained control of the helicopter and landed without further incident. A post accident examination revealed the helicopter sustained substantial damage to the main rotor blades. The pilot reported that there were no preimpact mechanical failures or malfunctions with the airplane that would have precluded normal operation.
Flight
Event TypeAccident
Event Time10:00 MST
Nearest Airport0nm
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftRobinson R44 II
Tail NumberN4246Z
Aircraft CategoryHeli
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · IO-540-AE1A5 · Reciprocating
Seats4
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 57 · Third Class · None
Conditions
ConditionsVMC
LightDaylight
Wind350° @ 4 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point0 C / -6 C
Altimeter30.30 inHg
Observation Time17:15
Weather SourceWFAC