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
April 4, 1984 · Piper Aerostar 600 Aerostar 6 · N3645T
Pontiac, MI
Overview
Report Status
Preliminary report
Event Type
Accident
Date
April 4, 1984
Injury Outcomes
No injuries (1 uninjured)
Location
Pontiac, MI
Aircraft
Piper Aerostar 600 Aerostar 6
Tail Number
N3645T
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CHI84FA148
DURING AN ILS APCH, THE ACFT COLLIDED WITH TREETOPS WHILE IT WAS SLIGHTLY LEFT OF THE APCH COURSE NEAR THE MIDDLE MARKER. THE PLT CONTINUED TO FLY THE ACFT TO THE RWY & THE PLANE TOUCHED DOWN ABOUT 1000 FT BEYOND THE THRESHOLD. AT TOUCHDOWN, THE ACFT VEERED TO THE RIGHT & SKIDDED TO A STOP BETWEEN THE RWY & A TAXIWAY. AN EXAM REVEALED THAT THE LEADING EDGES OF THE WINGS & THE RIGHT MAIN GEAR WERE DAMAGED DURING IMPACT WITH THE TREES. SCRAPE MARKS WERE FOUND ON THE TREAD OF THE RIGHT MAIN TIRE WHICH SHOWED THAT IT HAD SKIDDED ABOUT 90 DEG TO THE PLANE OF ROTATION AS IF IT HAD BEEN COCKED AT TOUCHDOWN. THE PLT STATED THAT SHE WAS CHASING THE NEEDLE DEFLECTION WHILE ON THE ILS APCH & WAS NOT PROPERLY OBSERVING THE ALTIMETER WHEN THE ACFT HIT THE TREES. THE DECISION HEIGHT FOR THE ILS APCH WAS 1180 FT MSL. THE ARPT ELEVATION WAS 980 FT MSL.
Full Narrative
DURING AN ILS APCH, THE ACFT COLLIDED WITH TREETOPS WHILE IT WAS SLIGHTLY LEFT OF THE APCH COURSE NEAR THE MIDDLE MARKER. THE PLT CONTINUED TO FLY THE ACFT TO THE RWY & THE PLANE TOUCHED DOWN ABOUT 1000 FT BEYOND THE THRESHOLD. AT TOUCHDOWN, THE ACFT VEERED TO THE RIGHT & SKIDDED TO A STOP BETWEEN THE RWY & A TAXIWAY. AN EXAM REVEALED THAT THE LEADING EDGES OF THE WINGS & THE RIGHT MAIN GEAR WERE DAMAGED DURING IMPACT WITH THE TREES. SCRAPE MARKS WERE FOUND ON THE TREAD OF THE RIGHT MAIN TIRE WHICH SHOWED THAT IT HAD SKIDDED ABOUT 90 DEG TO THE PLANE OF ROTATION AS IF IT HAD BEEN COCKED AT TOUCHDOWN. THE PLT STATED THAT SHE WAS CHASING THE NEEDLE DEFLECTION WHILE ON THE ILS APCH & WAS NOT PROPERLY OBSERVING THE ALTIMETER WHEN THE ACFT HIT THE TREES. THE DECISION HEIGHT FOR THE ILS APCH WAS 1180 FT MSL. THE ARPT ELEVATION WAS 980 FT MSL.
Flight
Event TypeAccident
Event Time07:22 EST
Nearest AirportPontiac/Oakland (0nm N)
Runway9R
Runway Length6200 ft
Runway Width150 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper Aerostar 600 Aerostar 6
Tail NumberN3645T
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsLycoming · IO-540-K1J5 · Reciprocating · 290
Seats2
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 28 · Second Class
Conditions
ConditionsIMC
LightDaylight
Wind140° @ 10 kt
Ceiling100 ft
Temperature / Dew Point0 C / 0 C
Altimeter29.00 inHg
Observation Time12:22
Weather SourceWFAC