# N422ES: Simmons Gary F STOL CH 701

- Status: Valid registration
- Airframe: [Simmons Gary F STOL CH 701](https://openairdocs.org/model/simmons-gary-f-stol-ch-701) (registry code 05629Z3, 2 seats)
- Engine: [Viking 110](https://openairdocs.org/engine/viking-110) (registry code 63700)
- Serial number: 7200
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Zenith Acft Co STOL CH 701
- Airworthiness: Experimental, amateur built
- Airworthiness date: September 29, 2010
- Certificate issued: July 23, 2025
- Expires: July 31, 2032
- Mode S code: A50382
- Registered owner: [Fedorov Roman](https://openairdocs.org/faa-owner/FEDOROV%20ROMAN)
- Location: [Walnut Creek, CA](https://openairdocs.org/faa-place/CA/Walnut%20Creek)
- Owner type: Individual
- Owner's area on the map: 37.9177° N, 122.0718° W: Placed by OpenAirDocs at the center of ZIP code 94597, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=422ES
- Page: https://openairdocs.org/aircraft/N422ES

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.

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

### Matched by airframe (Simmons Gary F STOL CH 701)

None in force.

### Matched by engine (Viking 110)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations (1)

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.

- [NTSB WPR17LA156](https://openairdocs.org/ntsb/WPR17LA156), Jul 15, 2017: Simmons Gary F Stol CH 701 (N422ES), Kenwood, CA, substantial damage. Probable cause: Failure of the flywheel drive assembly, which resulted in a loss of engine power and subsequent forced landing to uneven terrain.

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 20170715009949A](https://openairdocs.org/incident/20170715009949A), Jul 15, 2017: Simmons Gary F STOL CH 701 (N422ES), Glen Ellen, CA, Substantial damage. N422ES, experimental stol ch 701, crash landed in a field due to mechanical issues with the engine. Substantial damage, no injuries.

## 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 Simmons Gary F STOL CH 701 aircraft: https://openairdocs.org/model/simmons-gary-f-stol-ch-701/aircraft.md
- The Viking 110 engine: https://openairdocs.org/engine/viking-110.md

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