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
Featured Report

Loading…

Loading featured report…

Loading…
Open 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…

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 manufacturers

Airports

More airports

Operators

More operators

About

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 14, 1992 · Enstrom 280C · N51782

Iron Mountain, MI

Overview

Report Status
Probable Cause
Event Type
Accident
Date
April 14, 1992
Injury Outcomes
No injuries (2 uninjured)
Location
Iron Mountain, MI
Aircraft
Enstrom 280C
Tail Number
N51782
Operator
Loewen John L
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CHI92LA129

THE PILOT REPORTED A PARTIAL POWER LOSS SHORTLY AFTER LIFT-OFF, FOLLOWED BY A COMPLETE LOSS OF POWER. AN AUTOROTATION TO A FIELD RESULTED IN A HARD LANDING. INSPECTION OF THE HELICOPTER DISCLOSED 22CC OF WATER REMAINING IN THE AIR INDUCTION SYSTEM CLOSE TO THE AIR FILTER. ONCE THE WATER WAS REMOVED, THE ENGINE STARTED AND RAN NORMALLY. FUEL ABOARD THE HELICOPTER WAS THE PROPER GRADE AND FREE OF CONTAMINANTS. FOUR DAYS PRIOR TO THE ACCIDENT FLIGHT, A HEAVY SNOW PASSED THROUGH THE AREA WHERE THE HELICOPTER WAS PARKED OUTSIDE AND UNCOVERED. THE ACCIDENT FLIGHT WAS THE FIRST SINCE THE SNOW STORM.

NTSB Probable Cause

THE PRESENCE OF WATER IN THE AIR INDUCTION SYSTEM.

Full Narrative

THE PILOT REPORTED A PARTIAL POWER LOSS SHORTLY AFTER LIFT-OFF, FOLLOWED BY A COMPLETE LOSS OF POWER. AN AUTOROTATION TO A FIELD RESULTED IN A HARD LANDING. INSPECTION OF THE HELICOPTER DISCLOSED 22CC OF WATER REMAINING IN THE AIR INDUCTION SYSTEM CLOSE TO THE AIR FILTER. ONCE THE WATER WAS REMOVED, THE ENGINE STARTED AND RAN NORMALLY. FUEL ABOARD THE HELICOPTER WAS THE PROPER GRADE AND FREE OF CONTAMINANTS. FOUR DAYS PRIOR TO THE ACCIDENT FLIGHT, A HEAVY SNOW PASSED THROUGH THE AREA WHERE THE HELICOPTER WAS PARKED OUTSIDE AND UNCOVERED. THE ACCIDENT FLIGHT WAS THE FIRST SINCE THE SNOW STORM.

Flight

Event TypeAccident
Event Time12:00 CDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftEnstrom 280C
Tail NumberN51782
Aircraft CategoryHeli
DamageSubstantial
OperatorLoewen John L
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · HIO-360-E1AD · Reciprocating · 205
Seats3

People & Injuries

Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 42 · Third Class

Conditions

ConditionsVMC
LightDaylight
Wind315° @ 5 kt
Visibility8 sm
CeilingOvercast 5000 ft
Temperature / Dew Point39 C / 0 C
Altimeter0
Weather SourcePILO

Appendix: Source Data