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 9, 1990 · Piper PA-25-235 · N7136Z
Andover, SD
Overview
Report Status
Probable Cause
Event Type
Accident
Date
June 9, 1990
Injury Outcomes
1 injury (1 minor injury)
Location
Andover, SD
Aircraft
Piper PA-25-235
Tail Number
N7136Z
Operator
Martin L Beving
Injuries
Minor
Aircraft Damage
Destroyed
NTSB Number
DEN90LA131
THE PILOT WAS ON A SWATH RUN DELIVERING CHEMICAL TO A FARM FIELD. HE STATED, 'I CAME OVER THE HILL IN THE FIELD AND HIT A TREE ON THE EDGE OF IT. . . AS I CAME OVER THE TOP OF THE HILL IT [THE TREE] BLENDED IN WITH ANOTHER TREE BEHIND IT SO IT WAS CLOSER THAN I REALIZED.' THE PILOT ATTEMPTED TO PULL UP TO AVOID THE TREE, AND BELIEVES THE AIRPLANE STALLED SHORTLY THEREAFTER.
NTSB Probable Cause
THE PILOT'S FAILURE TO MAINTAIN PROPER CLEARANCE DURING THE SWATH RUN.
Full Narrative
THE PILOT WAS ON A SWATH RUN DELIVERING CHEMICAL TO A FARM FIELD. HE STATED, 'I CAME OVER THE HILL IN THE FIELD AND HIT A TREE ON THE EDGE OF IT. . . AS I CAME OVER THE TOP OF THE HILL IT [THE TREE] BLENDED IN WITH ANOTHER TREE BEHIND IT SO IT WAS CLOSER THAN I REALIZED.' THE PILOT ATTEMPTED TO PULL UP TO AVOID THE TREE, AND BELIEVES THE AIRPLANE STALLED SHORTLY THEREAFTER.
Flight
Event TypeAccident
Event Time17:30 CDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA-25-235
Tail NumberN7136Z
Aircraft CategoryAir
DamageDestroyed
OperatorMartin L Beving
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-540-B2B5 · Reciprocating · 235
Seats1
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 39 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind300° @ 7 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point52
Altimeter30.00 inHg
Observation Time22:50
Weather SourceWFAC