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

December 27, 1991 · Cessna 172M · N6623H

Sanford, MI

Overview

Report Status
Probable Cause
Event Type
Accident
Date
December 27, 1991
Injury Outcomes
2 injuries (2 fatalities)
Location
Sanford, MI
Aircraft
Cessna 172M
Tail Number
N6623H
Operator
La Cross Gordon D
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
CHI92FA062

THE AIRCRAFT WAS OBSERVED IN LOW LEVEL CRUISE FLIGHT OVER A LAKE. IN A NARROW PORTION OF THE LAKE THE AIRCRAFT VERTICAL STABILIZER STRUCK WIRES WHICH WERE APPROXIMATELY 50 FEET ABOVE THE LAKE AT THE LOWEST POINT. THE AIRCRAFT DEPARTED CONTROLLED FLIGHT AND IMPACTED THE TERRAIN (WATER).

NTSB Probable Cause

THE PILOT-IN-COMMAND'S FAILURE TO MAINTAIN A VISUAL LOOKOUT TO AVOID A WIRE STRIKE. FACTORS WERE THE PILOT-IN-COMMAND'S INTENTIONAL LOW LEVEL FLIGHT, HIS FAILURE TO MAINTAIN PROPER ALTITUDE, AND THE TRANSMISSION WIRES.

Full Narrative

THE AIRCRAFT WAS OBSERVED IN LOW LEVEL CRUISE FLIGHT OVER A LAKE. IN A NARROW PORTION OF THE LAKE THE AIRCRAFT VERTICAL STABILIZER STRUCK WIRES WHICH WERE APPROXIMATELY 50 FEET ABOVE THE LAKE AT THE LOWEST POINT. THE AIRCRAFT DEPARTED CONTROLLED FLIGHT AND IMPACTED THE TERRAIN (WATER).

Flight

Event TypeAccident
Event Time13:52 EST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftCessna 172M
Tail NumberN6623H
Aircraft CategoryAir
DamageDestroyed
OperatorLa Cross Gordon D
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320-E2D · Reciprocating · 150
Seats4

People & Injuries

Injury Summary2 injuries (2 fatalities)
Fatal2
Serious0
Minor0
Uninjured0
Total2
Crew 1Age 48 · Second Class

Conditions

ConditionsVMC
LightDaylight
Wind90° @ 6 kt
Visibility10 sm
CeilingBroken clouds 2300 ft
Temperature / Dew Point37 C / 28 C
Altimeter30.00 inHg
Observation Time18:50
Weather SourceWFAC

Appendix: Source Data