# NTSB CHI85LA289: Bensen B8M, N9729N, Hebron, OH, July 12, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 11, 1985, 21:00 local (Jul 12, 1985, 01:00 UTC)
- Place: Hebron, OH
- Coordinates: 39.960334, -82.489929 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.9603&lon=-82.4899&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 13142
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI85LA289
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13142/pdf
- Page: https://openairdocs.org/ntsb/CHI85LA289

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power(partial) - mech failure/malf, approach
  - throttle/power lever,cable - loose (cause)
  - aircraft preflight - inadequate, pilot in command (cause)
- Forced landing, descent - emergency
- In flight collision with terrain/water, descent - emergency
  - terrain condition - ground

## Analysis

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.

## Aircraft

- Registration: [N9729N](https://openairdocs.org/deregistered/N9729N-1994-08-03), registration cancelled 1994-08-03, S/N 41370 (OpenAirDocs)
- Reported make and model: BENSEN B8M
- Registry model: [Gilbert James P BENSEN B-8M](https://openairdocs.org/model/gilbert-james-p-bensen-b-8m) (registry code 13021NE) (OpenAirDocs)
- Category: Gyroplane, amateur-built
- Serial number: 41370
- Airframe hours: 3
- Engines: McCulloch UNK reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Registered owner: James P. Gilbert
- Airworthiness certificate: Special, Experimental (Special)

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 29; seat: center

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 5 statute miles
- Lowest ceiling: none
- Temperature: 81 °F

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19850711035219A](https://openairdocs.org/incident/19850711035219A), Jul 11, 1985: Amtrbx BENSENB8M, Hebron, OH, Destroyed. Throttle cable became loose. Autorotated, hit nose first, blades hit ground. No pilot or medical certificate.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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