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
June 2, 1984 · Bell 206 · N9722R
Allegheny, CA
Overview
Report Status
Preliminary report
Event Type
Accident
Date
June 2, 1984
Injury Outcomes
2 injuries (2 minor injuries)
Location
Allegheny, CA
Aircraft
Bell 206
Tail Number
N9722R
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
LAX84LA329
THE PLT WAS DELIVERING SUPPLIES FROM A MOUNTAIN SITE TO A RIVER WORK SITE. HE STATED THAT ON HIS 10TH & LAST FLT, THE WIND CAUSED THE HELICOPTER & EXTERNAL LOAD COMBINATION TO SHIFT LATERALLY. AT THAT TIME, THE LOAD/LINE BECAME ENTANGLED IN A TREE. THE HELICOPTER BEGAN MOVING IN AN ARC & SUBSEQUENTLY CRASHED IN THE RIVER. THE PLT STATED THAT HE WAS UNABLE TO RELEASE THE LOAD; ALTHO, HE HAD PREVIOUSLY CHECKED THE ELECTRICAL & MANUAL RELEASE MECHANISMS & THEY OPERATED NORMALLY. HE ESTIMATED THAT THE WIND WAS FROM 050 DEG AT 5 GUSTING 7 KTS. THE ELEVATION OF THE CRASH SITE WAS ABOUT 3100 FT.
Full Narrative
THE PLT WAS DELIVERING SUPPLIES FROM A MOUNTAIN SITE TO A RIVER WORK SITE. HE STATED THAT ON HIS 10TH & LAST FLT, THE WIND CAUSED THE HELICOPTER & EXTERNAL LOAD COMBINATION TO SHIFT LATERALLY. AT THAT TIME, THE LOAD/LINE BECAME ENTANGLED IN A TREE. THE HELICOPTER BEGAN MOVING IN AN ARC & SUBSEQUENTLY CRASHED IN THE RIVER. THE PLT STATED THAT HE WAS UNABLE TO RELEASE THE LOAD; ALTHO, HE HAD PREVIOUSLY CHECKED THE ELECTRICAL & MANUAL RELEASE MECHANISMS & THEY OPERATED NORMALLY. HE ESTIMATED THAT THE WIND WAS FROM 050 DEG AT 5 GUSTING 7 KTS. THE ELEVATION OF THE CRASH SITE WAS ABOUT 3100 FT.
Flight
Event TypeAccident
Event Time12:20 PDT
Nearest Airport0nm N
Runway0
Flight Plan FiledCvfr
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell 206
Tail NumberN9722R
Aircraft CategoryHeli
DamageSubstantial
Operating RulePart 133
Engines1
Engine TypeTurboshaft
Engine DetailsAllison · 250-C20 · Turboshaft · 317
People & Injuries
Injury Summary2 injuries (2 minor injuries)
Fatal0
Serious0
Minor2
Uninjured0
Total2
Crew 1Second Class
Conditions
ConditionsVMC
LightDaylight
Wind110° @ 8 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point54
Altimeter29.00 inHg
Observation Time19:50
Weather SourceWFAC