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 30, 1991 · Hughes TH-55A · N115NR
Roseau, MN
Overview
Report Status
Status unavailable
Event Type
Accident
Date
May 30, 1991
Injury Outcomes
1 injury (1 minor injury), 1 uninjured
Location
Roseau, MN
Aircraft
Hughes TH-55A
Tail Number
N115NR
Operator
Mn Dept of Natural Resources
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
CHI91TL#04
Flight
Event TypeAccident
Event Time11:55 CDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftHughes TH-55A
Tail NumberN115NR
Aircraft CategoryHeli
DamageSubstantial
OperatorMn Dept of Natural Resources
Engines1
Seats2
People & Injuries
Injury Summary1 injury (1 minor injury), 1 uninjured
Fatal0
Serious0
Minor1
Uninjured1
Total2
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility20 sm
CeilingOvercast 5000 ft
Temperature / Dew Point70 F / 0 C
Altimeter29.00 inHg
Observation Time11:55