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
May 14, 2026 · Mcdonnell Douglas Helicopter 500 · N952SF
Twin Falls, ID
Overview
Report Status
Probable Cause
Event Type
Accident
Date
May 14, 2026
Injury Outcomes
1 injury (1 minor injury)
Location
Twin Falls, ID
Aircraft
Mcdonnell Douglas Helicopter 500 (1989)
Tail Number
N952SF
Operator
Interparts General Business
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
WPR26LA188
The pilot stated he was maneuvering the helicopter around and near the airport property. While practicing hovering, he was evaluating the left lateral cyclic trim control. The helicopter encountered wind and rolled, coming to rest on its left side. During the accident sequence, the main rotor blades severed the tail boom from the airframe. The pilot stated there were no pre impact mechanical malfunctions or failures with the helicopter that would have precluded normal operation. At the time of the accident, the wind was from 320° at 11 knots, gusting to 17 knots.
NTSB Probable Cause
The pilot’s failure to maintain control while hovering in gusty wind conditions, resulting in the helicopter rolling onto its side.
Full Narrative
The pilot stated he was maneuvering the helicopter around and near the airport property. While practicing hovering, he was evaluating the left lateral cyclic trim control. The helicopter encountered wind and rolled, coming to rest on its left side. During the accident sequence, the main rotor blades severed the tail boom from the airframe. The pilot stated there were no pre impact mechanical malfunctions or failures with the helicopter that would have precluded normal operation. At the time of the accident, the wind was from 320° at 11 knots, gusting to 17 knots.
Flight
Event TypeAccident
Event Time14:30 MDT
Nearest AirportJoslin Fld/Magic Valley Rgnl (0nm E)
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftMcdonnell Douglas Helicopter 500
Tail NumberN952SF
Aircraft CategoryHeli
DamageSubstantial
OperatorInterparts General Business
Operating RulePart 91
Engines1
Engine TypeTurboshaft
Engine DetailsAllison · 250C20B · Turboshaft · 420
Seats4
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 75 · Basc · Minor
Conditions
ConditionsVMC
LightDaylight
Wind320° @ 11 kt, gusting 17 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point66 F / 27 F
Altimeter30.06 inHg
Observation Time14:53
Weather SourceWFAC