# NTSB FTW86LPJ11: Homebuilt SA-100, N57DH, Oklahoma City, OK, August 17, 1986

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Final report
- Date: August 17, 1986, 12:44 local (18:44 UTC)
- Place: Oklahoma City, OK
- Coordinates: 35.5498, -97.640434 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=35.5498&lon=-97.6404&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 22110
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW86LPJ11
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/22110/pdf
- Page: https://openairdocs.org/ntsb/FTW86LPJ11

## 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, maneuvering
  - fuel system,carburetor - contamination (cause)
  - fuel system,carburetor - incorrect (cause)
  - aerobatics - performed, pilot in command
- Forced landing, descent - emergency
- Nose over, landing - roll
  - terrain condition - crop (contributing factor)

## Analysis

THE ACFT NOSED OVER DURING A FORCED LANDING AFTER A POWER LOSS. THE PLT STATED AFTER THE ACCIDENT THAT THE ENGINE LOST POWER DURING A ROLL MANEUVER. THE ENGINE RAN FOR A SHORT TIME AT APRX 1800 RPM AND THEN STOPPED COMPLETELY. THE PLT LANDED IN A CULTIVATED WHEAT FIELD WHILE ENROUTE TO THE NEAREST AIRPORT (SUNDANCE). DURING A POST ACCIDENT CHECK THE ENGINE STARTED BUT WOULD NOT DEVELOP FULL POWER AND CUT OUT AT 1300 RPM. WHEN THE CARBURETOR WAS REMOVED AND CHECKED IT WAS FOUND TO CONTAIN A TRASH BUILD-UP AT THE DISCHARGE NEEDLE PLUS A LEAN MIXTURE SETTING.

## Aircraft

- Registration: N57DH (not matched to a registry record)
- Reported make and model: HOMEBUILT SA-100
- Category: Airplane, amateur-built
- Serial number: 1
- Airframe hours: 247
- Engines: LYCOMING O-290-DZ 135 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: H. David Howard
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, August 2, 1986, 9 hours before
- Departed: PWA, BETHANY, OK
- Destination: PWA, BETHANY, OK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: front; flight hours: 546 total, 29 in this make and model, 492 as pilot in command, 11 in the last 90 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 5 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 91 °F
- Altimeter: 30.00 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 19860817040469A](https://openairdocs.org/incident/19860817040469A), Aug 17, 1986: Amtrso STARDUSTR100, Oklahoma City, OK, Substantial damage. Lost power and rolled over. Nosed over on landing in a rough field. Found carburetor fouled with trash buildup.

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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