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
September 21, 1983 · Enstrom 280C · N5692L
Pontiac, MI
Overview
Report Status
Preliminary report
Event Type
Accident
Date
September 21, 1983
Injury Outcomes
2 injuries (2 serious injuries)
Location
Pontiac, MI
Aircraft
Enstrom 280C
Tail Number
N5692L
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
CHI83LA436
WHILE RETURNING FROM A TRAFFIC REPORTING FLT, THE PLT ELECTED TO PRACTICE AN AUTOROTATION. HE STATED THAT WHILE HE WAS IN THE PROCESS, THE ENG FAILED. HE REPORTED THAT HE HAD INITIATED STANDARD AUTOROTATION PROCEDURES, BUT IMPACTED HARD DURING THE LANDING. AFTER TOUCHDOWN, THE HELICOPTER ROLLED OVER & THE MAIN ROTOR BLADES STRUCK THE GROUND. THE ENGINE RAN PROPERLY DURING AN OPERATIONAL CHECK AFTER THE ACCIDENT.
Full Narrative
WHILE RETURNING FROM A TRAFFIC REPORTING FLT, THE PLT ELECTED TO PRACTICE AN AUTOROTATION. HE STATED THAT WHILE HE WAS IN THE PROCESS, THE ENG FAILED. HE REPORTED THAT HE HAD INITIATED STANDARD AUTOROTATION PROCEDURES, BUT IMPACTED HARD DURING THE LANDING. AFTER TOUCHDOWN, THE HELICOPTER ROLLED OVER & THE MAIN ROTOR BLADES STRUCK THE GROUND. THE ENGINE RAN PROPERLY DURING AN OPERATIONAL CHECK AFTER THE ACCIDENT.
Flight
Event TypeAccident
Event Time09:07 EDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftEnstrom 280C
Tail NumberN5692L
Aircraft CategoryHeli
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · HIO-360-E1BD · Reciprocating · 110
Seats3
People & Injuries
Injury Summary2 injuries (2 serious injuries)
Fatal0
Serious2
Minor0
Uninjured0
Total2
Crew 1Age 30 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind330° @ 10 kt, gusting 15 kt
Visibility15 sm
CeilingNone
Temperature / Dew Point61 F / 0 C
Altimeter0
Weather SourcePILO