# N688BA: 1985 Frank R Gerwat BENSON GYROCOPTER

- Status: Valid registration
- Airframe: [Frank R Gerwat BENSON GYROCOPTER](https://openairdocs.org/model/frank-r-gerwat-benson-gyrocopter) (registry code 05635R9, 1 seats)
- Engine: [Mcculloch 4318 series](https://openairdocs.org/engine/mcculloch-4318-series) (registry code 30181)
- Serial number: FG85B64532
- Year built: 1985
- Type: Rotorcraft
- Engine type: Reciprocating
- Airworthiness: Experimental, exhibition
- Airworthiness date: December 5, 2017
- Certificate issued: March 25, 2020
- Expires: March 31, 2027
- Mode S code: A92109
- Registered owner: [Sheldon Ranall W](https://openairdocs.org/faa-owner/SHELDON%20RANALL%20W)
- Location: [Costa Mesa, CA](https://openairdocs.org/faa-place/CA/Costa%20Mesa)
- Owner type: Individual
- Owner's area on the map: 33.6796° N, 117.9085° W: Placed by OpenAirDocs at the center of ZIP code 92626, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=688BA
- Page: https://openairdocs.org/aircraft/N688BA

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. The registry lists only the engine series, so ADs for every Mcculloch 4318 model are included.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (Frank R Gerwat BENSON GYROCOPTER)

None in force.

### Matched by engine (Mcculloch 4318 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N688BA.

## FAA accident and incident reports

None matched to N688BA.

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Related

- Other Frank R Gerwat BENSON GYROCOPTER aircraft: https://openairdocs.org/model/frank-r-gerwat-benson-gyrocopter/aircraft.md
- The Mcculloch 4318 series engine: https://openairdocs.org/engine/mcculloch-4318-series.md

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