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
September 11, 1985 · Jodel D-9 · N12HD
Okeechobee, FL
Overview
Report Status
Preliminary report
Event Type
Accident
Date
September 11, 1985
Injury Outcomes
1 injury (1 fatality)
Location
Okeechobee, FL
Aircraft
Jodel D-9
Tail Number
N12HD
Operator
Robert H Knosp
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
MIA85FA251
THE PLT HAD FLOWN ONLY 4 HAS IN THE LAST 6 MONTHS IN A CESSNA 150 TYPE ACFT & HAD NEVER FLOWN A JODEL 09 BEFORE. THE PLT BOARDED THE ACFT, DECLINED A COCKPIT CHECK BY THE OWNER & MADE AN IMMEDIATE TAKE OFF. THE PLT TOOK OFF FROM THE GRASS STRIP WITHOUT PERFORMING ANY PREFLT CHECK, ENG RUN UP OR MAGCHECK. THE TAILWHEEL EQUIPPED EXPERIMENTAL ACFT WAS OBSERVED BY 2 PLT WITNESSES TO MAKE THE ENTIRE TAKE OFF RUN IN A 3 POINT ATTITUDE. THE ACFT CLIMBED AWAY FROM THE GROUND IN A VERY NOSE HIGH ATTITUDE, LEVELED OFF, THEN ENTER A NOSE HIGH ATTITUDE AGAIN. THIS ERRATIC FLT PATH WAS REPEATED SEVERAL TIMES BEFORE THE ACFT WAS OBSERVED TO ENTER A STALL THEN SPIN TO THE GROUND FROM AN ALT OF 150 TO 200 FT. THE OWNER OF THE ACFT DESCRIBED THE ACFT AS EASY TO FLY BUT 'A LITTLE SENSITIVE ON THE CONTROLS.
Full Narrative
THE PLT HAD FLOWN ONLY 4 HAS IN THE LAST 6 MONTHS IN A CESSNA 150 TYPE ACFT & HAD NEVER FLOWN A JODEL 09 BEFORE. THE PLT BOARDED THE ACFT, DECLINED A COCKPIT CHECK BY THE OWNER & MADE AN IMMEDIATE TAKE OFF. THE PLT TOOK OFF FROM THE GRASS STRIP WITHOUT PERFORMING ANY PREFLT CHECK, ENG RUN UP OR MAGCHECK. THE TAILWHEEL EQUIPPED EXPERIMENTAL ACFT WAS OBSERVED BY 2 PLT WITNESSES TO MAKE THE ENTIRE TAKE OFF RUN IN A 3 POINT ATTITUDE. THE ACFT CLIMBED AWAY FROM THE GROUND IN A VERY NOSE HIGH ATTITUDE, LEVELED OFF, THEN ENTER A NOSE HIGH ATTITUDE AGAIN. THIS ERRATIC FLT PATH WAS REPEATED SEVERAL TIMES BEFORE THE ACFT WAS OBSERVED TO ENTER A STALL THEN SPIN TO THE GROUND FROM AN ALT OF 150 TO 200 FT. THE OWNER OF THE ACFT DESCRIBED THE ACFT AS EASY TO FLY BUT 'A LITTLE SENSITIVE ON THE CONTROLS.
Flight
Event TypeAccident
Event Time19:00 EDT
Nearest AirportRiver Acres (0nm N)
Runway15
Runway Length4200 ft
Runway Width75 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftJodel D-9
Tail NumberN12HD
Aircraft CategoryAir
DamageDestroyed
OperatorRobert H Knosp
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-145-B2 · Reciprocating · 65
Seats1
People & Injuries
Injury Summary1 injury (1 fatality)
Fatal1
Serious0
Minor0
Uninjured0
Total1
Crew 1Age 58 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind120° @ 6 kt
Visibility10 sm
CeilingBroken clouds 25000 ft
Altimeter29.00 inHg
Observation Time22:53
Weather SourceWFAC