Amateur-built B8M accident near Hebron, Ohio, July 12, 1985
On July 12, 1985 at about 1:00 am local time, a amateur-built B8M (gyroplane), registered N9729N, was destroyed in an accident near Hebron, Ohio. It was a personal flight under general aviation rules (Part 91). No one was hurt; 1 person was on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- July 12, 1985 · about 1:00 am local time
- Place
- Hebron, Ohio · map
- Type
- Accident
- Injuries
- No one was hurt; 1 person was on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Amateur-built B8M · all B8Ms on the register
- Registration
- N9729N · no longer on the register · serial 41370
- Damage
- Destroyed
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE GYROCOPTER LOST PARTIAL PWR WHILE IN THE TRAFFIC PATTERN AND THE PLT EXECUTED AN AUTOROTATION INTO A CORN FIELD. THE THROTTLE CABLE WAS FOUND LOOSE AFTER THE ACCIDENT.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
Pilot
- Medical certificate: None
- Seat: ctr
The aircraft
- Airframe total time: 3 hours
- Last inspection: inspection type not recorded
- Seats: 1
- Landing gear: fixed
- Engine: Mcculloch UNK (piston); 0 hours total
The flight
- Flight plan: none
- Runway 0
Weather at the time
- Light: daylight
- Visibility: 5 statute miles
- Sky: clear
- Temperature: 81°F (27°C), dew point 0°F (-18°C)
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.