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
July 23, 2013 · Hughes 269B · N9484F
Lewiston, ID
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
July 23, 2013
Injury Outcomes
No injuries (1 uninjured)
Location
Lewiston, ID
Aircraft
Hughes 269B
Tail Number
N9484F
Operator
Odonata
Injuries
None
Aircraft Damage
Substantial
NTSB Number
WPR13CA337
The pilot stated that he was conducting a full down practice autorotation which involved landing the helicopter as the final step. During the landing, the helicopter bounced which resulted in the main rotor striking the tail boom, severing the tail rotor drive shaft. The pilot stated that the accident could have been prevented if he had applied more forward cyclic after the helicopter had contacted the ground. The pilot reported no preimpact mechanical malfunctions or failures that would have precluded normal operation.
NTSB Probable Cause
Personnel issues-Action/decision-Action-Incorrect action performance-Pilot - C
Full Narrative
The pilot stated that he was conducting a full down practice autorotation which involved landing the helicopter as the final step. During the landing, the helicopter bounced, which resulted in the main rotor striking the tail boom, severing the tail rotor drive shaft. The pilot stated that the accident could have been prevented if he had applied more forward cyclic after the helicopter had contacted the ground. The pilot reported no preimpact mechanical malfunctions or failures that would have precluded normal operation.
Flight
Event TypeAccident
Event Time11:34 PDT
Nearest AirportLewiston-Nez Perce County Airp (0nm)
Runway30
Runway Length5000 ft
Runway Width100 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftHughes 269B
Tail NumberN9484F
Aircraft CategoryHeli
DamageSubstantial
OperatorOdonata
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · IO360 SER · Reciprocating · 180
Seats3
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 33 · Second Class · None
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility10 sm
CeilingNone
Temperature / Dew Point43 C
Altimeter29.97 inHg
Observation Time11:56
Weather SourceWFAC