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
June 20, 1983 · Boeing B-747 · N4717U
Chicago, IL
Overview
Report Status
Preliminary report
Event Type
Incident
Date
June 20, 1983
Injury Outcomes
No injuries (440 uninjured)
Location
Chicago, IL
Aircraft
Boeing B-747
Tail Number
N4717U
Injuries
None
Aircraft Damage
Minor
NTSB Number
CHI83IA269
THE UNITED AIRLINES B747 WAS STANDING IN THE RUN UP AREA ADJACENT TO THE RUNWAY. A FLYING TIGERS B747 WAS PASSING TO HIS LEFT. THE CREW OF THE PARKED B747 OPENED THEIR OVERHEAD ESCAPE HATCH AND INDICATED TO THE TAXIING B747 WITH A THUMBS UP SIGN THAT THERE WAS ADEQUATE CLEARANCE. THE TAXIING B747 THEN PROCEEDED FORWARD AND HIT THE NOSE AREA OF THE PARKED B747 WITH THEIR RIGHT WING TIP. BOTH ACFT THEN TAXIED BACK TO THE RAMP WITHOUT FURTHER INCIDENT.
Full Narrative
THE UNITED AIRLINES B747 WAS STANDING IN THE RUN UP AREA ADJACENT TO THE RUNWAY. A FLYING TIGERS B747 WAS PASSING TO HIS LEFT. THE CREW OF THE PARKED B747 OPENED THEIR OVERHEAD ESCAPE HATCH AND INDICATED TO THE TAXIING B747 WITH A THUMBS UP SIGN THAT THERE WAS ADEQUATE CLEARANCE. THE TAXIING B747 THEN PROCEEDED FORWARD AND HIT THE NOSE AREA OF THE PARKED B747 WITH THEIR RIGHT WING TIP. BOTH ACFT THEN TAXIED BACK TO THE RAMP WITHOUT FURTHER INCIDENT.
Flight
Event TypeIncident
Event Time11:29 CDT
Nearest AirportO'Hare (0nm N)
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBoeing B-747
Tail NumberN4717U
Aircraft CategoryAir
DamageMinor
Operating RulePart 121
Engines4
Engine TypeTurbofan
Engine DetailsP&W · JT9D · Turbofan | P&W · JT9D · Turbofan
Seats427
People & Injuries
Injury SummaryNo injuries (440 uninjured)
Fatal0
Serious0
Minor0
Uninjured440
Total440
Crew 1Age 42 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind120° @ 6 kt
Visibility4 sm
CeilingNone
Temperature / Dew Point64 F
Altimeter30.00 inHg
Observation Time17:29
Weather SourceWFAC