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
December 10, 1991 · Mbb BO-105CBS · N750H
De Ruyter, NY
Overview
Report Status
Probable Cause
Event Type
Accident
Date
December 10, 1991
Injury Outcomes
3 injuries (3 fatalities)
Location
De Ruyter, NY
Aircraft
Mbb BO-105CBS
Tail Number
N750H
Operator
Omniflight Helicopters
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
NYC92FA044
THE MEDIVAC HELICOPTER WAS CRUISING AT 2700 FEET (700 FT AGL) WHEN IT SUDDENLY ENTERED A RIGHT TURN OF 95 DEG IN 15 SEC WHILE MAINTAINING ALTITUDE. THIS WAS FOLLOWED BY A DESCENDING LEFT TURN OF 60 DEG IN LESS THAN 5 SECONDS. THE HELICOPTER IMPACTED IN A SKIDS LEVEL, NOSE DOWN PITCH ATTITUDE. THE ACCIDENT OCCURRED AT NIGHT OVER AN UNLIGHTED AREA WITH OVERCAST CLOUD CONDITIONS. INTERVIEWS AND EXAMINATION OF COMPANY CORRESPONDENCE DISCLOSED THE PILOT HAD A DOCUMENTED PROBLEM WITH NIGHT FLYING AND NAVIGATION.
NTSB Probable Cause
AN INFLIGHT COLLISION WITH TERRAIN AFTER THE PILOT EXPERIENCED SPATIAL DISORIENTATION. FACTORS RELATED TO THE ACCIDENT WERE THE NIGHT CONDITIONS, AND THE LACK OF VISUAL CUES.
Full Narrative
THE MEDIVAC HELICOPTER WAS CRUISING AT 2700 FEET (700 FT AGL) WHEN IT SUDDENLY ENTERED A RIGHT TURN OF 95 DEG IN 15 SEC WHILE MAINTAINING ALTITUDE. THIS WAS FOLLOWED BY A DESCENDING LEFT TURN OF 60 DEG IN LESS THAN 5 SECONDS. THE HELICOPTER IMPACTED IN A SKIDS LEVEL, NOSE DOWN PITCH ATTITUDE. THE ACCIDENT OCCURRED AT NIGHT OVER AN UNLIGHTED AREA WITH OVERCAST CLOUD CONDITIONS. INTERVIEWS AND EXAMINATION OF COMPANY CORRESPONDENCE DISCLOSED THE PILOT HAD A DOCUMENTED PROBLEM WITH NIGHT FLYING AND NAVIGATION.
Flight
Event TypeAccident
Event Time20:47 EST
Nearest Airport0nm N
Runway0
Flight Plan FiledCvfr
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftMbb BO-105CBS
Tail NumberN750H
Aircraft CategoryHeli
DamageDestroyed
OperatorOmniflight Helicopters
Operating RulePart 91
Engines2
Engine TypeTurboshaft
Engine DetailsAllison · 250-C20B · Turboshaft · 420
Seats4
People & Injuries
Injury Summary3 injuries (3 fatalities)
Fatal3
Serious0
Minor0
Uninjured0
Total3
Crew 1Age 49 · Second Class
Conditions
ConditionsVMC
LightDark Night
Wind20°
Visibility10 sm
CeilingNone
Temperature / Dew Point37 C / 34 C
Altimeter29.00 inHg
Observation Time01:41
Weather SourceWFAC