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
February 10, 1984 · Cessna 172 RGII · N9557B
Seattle, WA
Overview
Report Status
Preliminary report
Event Type
Accident
Date
February 10, 1984
Injury Outcomes
No injuries (2 uninjured)
Location
Seattle, WA
Aircraft
Cessna 172 RGII
Tail Number
N9557B
Operator
Boeing Employees Flying Ass
Injuries
None
Aircraft Damage
Substantial
NTSB Number
SEA84LA051
DURING A TAKEOFF AFTER A TOUCH AND GO LANDING THE NOSE GEAR RETRACTED AT ABOUT THE TIME OF ROTATION. POWER WAS REDUCED TO IDLE AND THE ACFT SLID TO A STOP. THIS ACFT IS EQUIPPED WITH SQUAT SWITCHES WHICH PREVENT GEAR RETRACTION WHEN THE WEIGHT OF THE ACFT COMPRESSES THE STRUTS. TESTING DO NOT REVEAL ANY MALFUNCTION OF THE RETRACTION SYSTEM.
Full Narrative
DURING A TAKEOFF AFTER A TOUCH AND GO LANDING THE NOSE GEAR RETRACTED AT ABOUT THE TIME OF ROTATION. POWER WAS REDUCED TO IDLE AND THE ACFT SLID TO A STOP. THIS ACFT IS EQUIPPED WITH SQUAT SWITCHES WHICH PREVENT GEAR RETRACTION WHEN THE WEIGHT OF THE ACFT COMPRESSES THE STRUTS. TESTING DO NOT REVEAL ANY MALFUNCTION OF THE RETRACTION SYSTEM.
Flight
Event TypeAccident
Event Time16:30 PST
Nearest AirportBoeing Field (0nm N)
Runway13L
Runway Length10000 ft
Runway Width200 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 172 RGII
Tail NumberN9557B
Aircraft CategoryAir
DamageSubstantial
OperatorBoeing Employees Flying Ass
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-360-F1A6 · Reciprocating · 180
Seats4
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 53 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind200° @ 14 kt, gusting 20 kt
Visibility10 sm
CeilingBroken clouds 8000 ft
Temperature / Dew Point52 / 36 C
Altimeter29.00 inHg
Observation Time00:55
Weather SourceWFAC