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
July 9, 1991 · Cessna 172N · N734MD
Medford, OR
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 9, 1991
Injury Outcomes
1 injury (1 minor injury)
Location
Medford, OR
Aircraft
Cessna 172N
Tail Number
N734MD
Operator
Medford Jet Center
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
SEA91LA165
THE PILOT OF THE CESSNA 172 CONTACTED THE TOWER APPROXIMATELY EIGHT MINUTES PRIOR TO THE CRASH, AND INDICATED THAT HE WAS HAVING TROUBLE WITH AILERON CONTROL, AND WOULD BE RETURNING TO THE FIELD TO ATTEMPT A LANDING. THE AIRCRAFT TOUCHED DOWN IN A GRASSY AREA NEAR THE RUNWAY, AND THEN BOUNCED BACK INTO THE AIR ABOUT FIVE TIMES BEFORE THE RIGHT WING CONTACTED THE GROUND. BOTH THE LOCAL POLICE AND THE FAA INVESTIGATED THE POSSIBILITY THAT THE CRASH OF THE AIRCRAFT WAS INTENTIONAL. AS A RESULT OF THIS ACCIDENT, THE PILOT, WHO WAS UNDER PSYCHOLOGICAL PRESSURE AT THE TIME OF THE FLIGHT, WAS LATER INDICTED BY THE GRAND JURY FOR MALICIOUS DESTRUCTION OF PROPERTY. PRIOR TO THE INDICTMENT, THE FAA ISSUED AN EMERGENCY REVOCATION OF THE PILOT'S LICENSE.
NTSB Probable Cause
AN INTENTIONAL PORPOISE. FACTORS INCLUDE THE PILOT'S PSYCHOLOGICAL CONDITION.
Full Narrative
THE PILOT OF THE CESSNA 172 CONTACTED THE TOWER APPROXIMATELY EIGHT MINUTES PRIOR TO THE CRASH, AND INDICATED THAT HE WAS HAVING TROUBLE WITH AILERON CONTROL, AND WOULD BE RETURNING TO THE FIELD TO ATTEMPT A LANDING. THE AIRCRAFT TOUCHED DOWN IN A GRASSY AREA NEAR THE RUNWAY, AND THEN BOUNCED BACK INTO THE AIR ABOUT FIVE TIMES BEFORE THE RIGHT WING CONTACTED THE GROUND. BOTH THE LOCAL POLICE AND THE FAA INVESTIGATED THE POSSIBILITY THAT THE CRASH OF THE AIRCRAFT WAS INTENTIONAL. AS A RESULT OF THIS ACCIDENT, THE PILOT, WHO WAS UNDER PSYCHOLOGICAL PRESSURE AT THE TIME OF THE FLIGHT, WAS LATER INDICTED BY THE GRAND JURY FOR MALICIOUS DESTRUCTION OF PROPERTY. PRIOR TO THE INDICTMENT, THE FAA ISSUED AN EMERGENCY REVOCATION OF THE PILOT'S LICENSE.
Flight
Event TypeAccident
Event Time14:28 PDT
Nearest AirportMEDFORD (0nm N)
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 172N
Tail NumberN734MD
Aircraft CategoryAir
DamageSubstantial
OperatorMedford Jet Center
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320H2AD · Reciprocating · 160
Seats4
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 23 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind320° @ 5 kt
Visibility30 sm
CeilingNone
Temperature / Dew Point48
Altimeter29.00 inHg
Observation Time21:32
Weather SourceWFAC