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
August 3, 1991 · Hiller 1345 · N57972
Michigan City, IN
Overview
Report Status
Probable Cause
Event Type
Accident
Date
August 3, 1991
Injury Outcomes
3 injuries (2 serious injuries, 1 minor injury)
Location
Michigan City, IN
Aircraft
Hiller 1345
Tail Number
N57972
Operator
Allan J Endries
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
CHI91LA245
THE PILOT SAID THAT WHILE RETURNING FROM A FLIGHT FILMING SESSION, THE ENGINE LOST POWER. AN EMERGENCY DESCENT WAS ATTEMPTED SHORT OF THE AIRPORT. THE HELICOPTER CRASHED IN A WOODED AREA. POST ACCIDENT INVESTIGATION REVEALED THE LOSS OF POWER WAS DUE TO FUEL EXHAUSTION.
NTSB Probable Cause
FUEL EXHAUSTION DUE THE PILOT'S DELAY IN REFUELING. FACTORS RELATED TO THE ACCIDENT WERE PRESSURE INDUCED BY OTHERS (PASSENGER), AND THE ABSENCE OF SUITABLE TERRAIN.
Full Narrative
THE PILOT SAID THAT WHILE RETURNING FROM A FLIGHT FILMING SESSION, THE ENGINE LOST POWER. AN EMERGENCY DESCENT WAS ATTEMPTED SHORT OF THE AIRPORT. THE HELICOPTER CRASHED IN A WOODED AREA. POST ACCIDENT INVESTIGATION REVEALED THE LOSS OF POWER WAS DUE TO FUEL EXHAUSTION.
Flight
Event TypeAccident
Event Time15:29 EDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftHiller 1345
Tail NumberN57972
Aircraft CategoryHeli
DamageSubstantial
OperatorAllan J Endries
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · VO-540-B1A · Reciprocating · 305
Seats3
People & Injuries
Injury Summary3 injuries (2 serious injuries, 1 minor injury)
Fatal0
Serious2
Minor1
Uninjured0
Total3
Crew 1Age 39 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind50° @ 6 kt
Visibility6 sm
CeilingBroken clouds 1200 ft
Temperature / Dew Point0 C / 0 C
Altimeter0
Observation Time19:50
Weather SourceWFAC