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
August 16, 2022 · Robinson Helicopter R66 · N641RZ
Millville, MN
Overview
Report Status
Probable Cause
Event Type
Accident
Date
August 16, 2022
Injury Outcomes
No injuries (1 uninjured)
Location
Millville, MN
Aircraft
Robinson Helicopter R66 (2011)
Tail Number
N641RZ
Operator
Iron Horse Aviation
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CEN22LA387
The pilot reported spraying several different fields throughout the day. During the accident spray pass, the pilot sighted a power line and attempted to avoid it by lowering the collective. The helicopter struck the power line and subsequently impacted terrain, which resulted in substantial damage to the main rotor blades and vertical stabilizer. The pilot reported that there were no mechanical malfunctions or failures that would have precluded normal operation and that he should made a more complete reconnaissance of the field.
NTSB Probable Cause
Environmental issues-Physical environment-Object/animal/substance-Wire-Contributed to outcome
Full Narrative
The pilot reported spraying several different fields throughout the day. During the accident spray pass, the pilot sighted a power line and attempted to avoid it by lowering the collective. The helicopter struck the power line and subsequently impacted terrain, which resulted in substantial damage to the main rotor blades and vertical stabilizer. The pilot reported that there were no mechanical malfunctions or failures that would have precluded normal operation and that he should made a more complete reconnaissance of the field.
Flight
Event TypeAccident
Event Time14:50 CDT
Nearest Airport0nm
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftRobinson Helicopter R66
Tail NumberN641RZ
Aircraft CategoryHeli
DamageSubstantial
OperatorIron Horse Aviation
Operating RulePart 137
Engines1
Engine TypeTurboshaft
Engine DetailsRolls Royce · RR300/250-C30 · Turboshaft · 300
Seats5
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 31 · Second Class · None
Conditions
ConditionsVMC
LightDaylight
Wind80° @ 6 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point57 F
Altimeter30.17 inHg
Observation Time14:54
Weather SourceWFAC