# NTSB ATL87DEI04: Butler EAA Biplane 1, N11TB, Orrville, OH, May 23, 1987

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Final report
- Date: May 23, 1987, 16:15 local (21:15 UTC)
- Place: Orrville, OH
- Coordinates: 40.840778, -81.770408 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.8408&lon=-81.7704&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report May 9, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 7226
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL87DEI04
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/7226/pdf
- Page: https://openairdocs.org/ntsb/ATL87DEI04

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, cruise
  - mixture control,cable - loose (cause)
  - maintenance,service of aircraft/equipment - inadequate, pilot in command (cause)
- Main gear collapsed, landing - roll
  - terrain condition - crop (cause)

## Analysis

ACFT LOST POWER AND WAS LANDED IN A CORN FIELD. LEFT MAIN GEAR COLLAPSED AND ACFT FLIPPED ONTO ITS BACK. MIXTURE CABLE SET SCREW ON CARBURETOR WAS FOUND LOOSE ALLOWING MIXTURE TO VIBRATE TO LEAN POSITION. EARLIER IN THE DAY THE PIC HAD REPLACED THE CARBURETOR.

## Aircraft

- Registration: [N11TB](https://openairdocs.org/deregistered/N11TB-2018-01-11), registration cancelled 2018-01-11, S/N 296, built 1970 (OpenAirDocs)
- Reported make and model: BUTLER EAA BIPLANE 1 (EAA BIPLAN)
- Registry model: [Butler EAA BIPLANE 1](https://openairdocs.org/model/butler-eaa-biplane-1) (registry code 33601AM) (OpenAirDocs)
- Registry engine: [Lycoming 0-290 series](https://openairdocs.org/engine/lycoming-0-290-series) (registry code 41506, 4 cycle) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 296
- Airframe hours: 178
- Engines: LYCOMING O-290-G4 125 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: William Bryson
- Registered owner: W.C. Byrson & J. Anthony
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, August 1, 1986, 16 hours before
- Departed: 3G3, WADSWORTH, OH

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 58; commercial, flight instructor; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: front; flight hours: 1,573 total, 14 in this make and model, 1,573 as pilot in command, 39 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 6 statute miles
- Lowest ceiling: none
- Temperature: 75 °F
- Altimeter: 29.00 inHg

## 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 19870523015539A](https://openairdocs.org/incident/19870523015539A), May 23, 1987: Amtrea EAABIPLANEP1, Orrville, OH, Substantial damage. The engine lost power. The aircraft landed in a cornfield. Mixture control set screw has been tightened.

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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