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
March 27, 1984 · Cessna 175 · N6733E
Portage, MI
Overview
Report Status
Preliminary report
Event Type
Accident
Date
March 27, 1984
Injury Outcomes
3 injuries (3 fatalities)
Location
Portage, MI
Aircraft
Cessna 175
Tail Number
N6733E
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
CHI84FA142
DURING A RETURN FLT TO TRAVERSE CITY, MI, THE ACFT WAS OBSERVED FLYING AT 'TREE TOP' & 'ROOF HEIGHT'. IN THE VICINITY OF THE CRASH SITE, THE ACFT WAS OBSERVED MANEUVERING. IT ENTERED A DIVE A TREE TOP LEVEL, THEN MADE A SWEEPING 270 DEG TURN TO ABOUT 500 FT AGL. AS IT WAS MANEUVERING, THE ACFT ENTERED A STEEP LEFT BANK, THEN THE RIGHT WING DROPPED & THE ACFT ENTERED A SPIN & CRASHED. NO PREIMPACT PART FAILURE OR MALFUNCTION WAS FOUND. THE ACFT WAS ESTIMATED TO BE LOADED TO A WT OF 2420 LBS. THE MAX AUTHORIZED GROSS WT WAS 2350 LBS.
Full Narrative
DURING A RETURN FLT TO TRAVERSE CITY, MI, THE ACFT WAS OBSERVED FLYING AT 'TREE TOP' & 'ROOF HEIGHT'. IN THE VICINITY OF THE CRASH SITE, THE ACFT WAS OBSERVED MANEUVERING. IT ENTERED A DIVE A TREE TOP LEVEL, THEN MADE A SWEEPING 270 DEG TURN TO ABOUT 500 FT AGL. AS IT WAS MANEUVERING, THE ACFT ENTERED A STEEP LEFT BANK, THEN THE RIGHT WING DROPPED & THE ACFT ENTERED A SPIN & CRASHED. NO PREIMPACT PART FAILURE OR MALFUNCTION WAS FOUND. THE ACFT WAS ESTIMATED TO BE LOADED TO A WT OF 2420 LBS. THE MAX AUTHORIZED GROSS WT WAS 2350 LBS.
Flight
Event TypeAccident
Event Time15:35 EST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 175
Tail NumberN6733E
Aircraft CategoryAir
DamageDestroyed
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · GO-300C · Reciprocating · 175
Seats4
People & Injuries
Injury Summary3 injuries (3 fatalities)
Fatal3
Serious0
Minor0
Uninjured0
Total3
Crew 1Age 30 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind90° @ 8 kt
Visibility7 sm
CeilingBroken clouds 4000 ft
Temperature / Dew Point0 C / 0 C
Altimeter29.00 inHg
Observation Time20:45
Weather SourceWFAC