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
December 1, 1990 · Piper PA-46-310P · N437OZ
Seattle, WA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
December 1, 1990
Injury Outcomes
No injuries (1 uninjured)
Location
Seattle, WA
Aircraft
Piper PA-46-310P
Tail Number
N437OZ
Operator
David S Weiss
Injuries
None
Aircraft Damage
Substantial
NTSB Number
SEA91LA032
THE PILOT OF THE PIPER PA-46-310P ATTEMPTED TO OVERRIDE HIS AUTOPILOT DURING A LOCALIZER INTERCEPT. HE HEARD THE STALL WARNING HORN, MISIDENTFYING IT AS THE LANDING GEAR HORN. HE STATED THAT HE THEN LOWERED THE LANDING GEAR. HE SAID THE AIRCRAFT THEN STALLED AND ENTERED A SPIN. DURING HIS SPIN RECOVERY ATTEMPT, HE BROKE OUT INTO VISUAL CONDITIONS. HE REENTERED THE CLOUDS AND WAS VECTORED FOR A SECOND ILS APPROACH, WHICH WAS SUCCESSFUL. THE UPPER WING SKINS ON BOTH WINGS WERE FOUND TO HAVE BEEN WRINKLED DURING THE EVENT.
NTSB Probable Cause
THE PILOT'S FAILURE TO MAINTAIN AIRSPEED WHILE ON AN INSTRUMENT APPROACH UNDER INSTRUMENT METEORLOGICAL CONDITIONS, RESULTING IN THE AIRCRAFT STALLING AND ENTER A SPIN.
Full Narrative
THE PILOT OF THE PIPER PA-46-310P ATTEMPTED TO OVERRIDE HIS AUTOPILOT DURING A LOCALIZER INTERCEPT. HE HEARD THE STALL WARNING HORN, MISIDENTFYING IT AS THE LANDING GEAR HORN. HE STATED THAT HE THEN LOWERED THE LANDING GEAR. HE SAID THE AIRCRAFT THEN STALLED AND ENTERED A SPIN. DURING HIS SPIN RECOVERY ATTEMPT, HE BROKE OUT INTO VISUAL CONDITIONS. HE REENTERED THE CLOUDS AND WAS VECTORED FOR A SECOND ILS APPROACH, WHICH WAS SUCCESSFUL. THE UPPER WING SKINS ON BOTH WINGS WERE FOUND TO HAVE BEEN WRINKLED DURING THE EVENT.
Flight
Event TypeAccident
Event Time01:30 PST
Nearest Airport0nm N
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA-46-310P
Tail NumberN437OZ
Aircraft CategoryAir
DamageSubstantial
OperatorDavid S Weiss
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · TSIO-520-BE · Reciprocating · 310
Seats6
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 38 · Second Class
Conditions
ConditionsVMC
LightDark Night
Wind180° @ 8 kt
Visibility5 sm
CeilingBroken clouds 1300 ft
Temperature / Dew Point45 C / 0 C
Altimeter0
Weather SourcePILO