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
April 13, 1992 · Aerospatiale SA315B · N315DY
Magna, UT
Overview
Report Status
Probable Cause
Event Type
Accident
Date
April 13, 1992
Injury Outcomes
No injuries (1 uninjured)
Location
Magna, UT
Aircraft
Aerospatiale SA315B
Tail Number
N315DY
Operator
Rocky Mountain Helicopters
Injuries
None
Aircraft Damage
Substantial
NTSB Number
SEA92LA076
THE PILOT OF THE AEROSPATIALE SA315B WAS ATTEMPTING TO LIFT AN EXTERNAL LOAD LIQUID DISPENSING BUCKET WHEN HE REACHED THE MAIN ROTOR PITCH LIMIT. HE THEREFORE REDUCED THE COLLECTIVE, AND AT THE SAME MOMENT EXPERIENCED A TOTAL LOSS OF POWER. THE AIRCRAFT THEN SETTLED ONTO THE BUCKET IT HAD BEEN ATTEMPTING TO LIFT, AND EVENTUALLY ROLLED OVER AND CONTACTED THE GROUND. INVESTIGATION REVEALED THAT, FOR UNDETERMINED REASONS, THE ENGINE HAD EXPERIENCED AN OVER TEMPERATURE CONDITION, WHICH CAUSED THE TURBINE BLADES TO FAIL.
NTSB Probable Cause
THE OVERHEAT OF THE ENGINE COMBUSTION SECTION, AND THE FAILURE OF THE TURBINE BLADES.
Full Narrative
THE PILOT OF THE AEROSPATIALE SA315B WAS ATTEMPTING TO LIFT AN EXTERNAL LOAD LIQUID DISPENSING BUCKET WHEN HE REACHED THE MAIN ROTOR PITCH LIMIT. HE THEREFORE REDUCED THE COLLECTIVE, AND AT THE SAME MOMENT EXPERIENCED A TOTAL LOSS OF POWER. THE AIRCRAFT THEN SETTLED ONTO THE BUCKET IT HAD BEEN ATTEMPTING TO LIFT, AND EVENTUALLY ROLLED OVER AND CONTACTED THE GROUND. INVESTIGATION REVEALED THAT, FOR UNDETERMINED REASONS, THE ENGINE HAD EXPERIENCED AN OVER TEMPERATURE CONDITION, WHICH CAUSED THE TURBINE BLADES TO FAIL.
Flight
Event TypeAccident
Event Time08:45 MDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAerospatiale SA315B
Tail NumberN315DY
Aircraft CategoryHeli
DamageSubstantial
OperatorRocky Mountain Helicopters
Operating RulePart 133
Engines1
Engine TypeTurboshaft
Engine DetailsTurbomeca · ARTOUSTE IIIB · Turboshaft · 858
Seats5
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 43 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind180° @ 5 kt
Visibility20 sm
CeilingNone
Temperature / Dew Point64 F / 0 C
Altimeter29.00 inHg
Weather SourcePILO