# N475AM: Grumman Aircraft ENG C-1A

- Status: Valid registration
- Airframe: [Grumman Aircraft ENG C-1A](https://openairdocs.org/model/grumman-aircraft-eng-c-1a) (registry code 3951014, 9 seats)
- Engine: [Wright R-1820 series](https://openairdocs.org/engine/wright-r-1820-series) (registry code 67020)
- Serial number: 136781
- Type: Fixed wing multi engine
- Engine type: Reciprocating
- Airworthiness: Experimental, exhibition
- Airworthiness date: October 31, 1986
- Certificate issued: August 13, 2014
- Expires: August 31, 2027
- Mode S code: A5D3B9
- Registered owner: [Pacific Coast Air Museum](https://openairdocs.org/faa-owner/PACIFIC%20COAST%20AIR%20MUSEUM)
- Location: [Santa Rosa, CA](https://openairdocs.org/faa-place/CA/Santa%20Rosa)
- Owner type: Corporation
- Owner's area on the map: 38.5037° N, 122.7541° W: Placed by OpenAirDocs at the center of ZIP code 95403, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=475AM
- Page: https://openairdocs.org/aircraft/N475AM

From the FAA registry file of October 22, 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 Wright R-1820 model are included.

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

### Matched by airframe (Grumman Aircraft ENG C-1A)

None in force.

### Matched by engine (Wright R-1820 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N475AM.

## FAA accident and incident reports

None matched to N475AM.

## 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 Grumman Aircraft ENG C-1A aircraft: https://openairdocs.org/model/grumman-aircraft-eng-c-1a/aircraft.md
- The Wright R-1820 series engine: https://openairdocs.org/engine/wright-r-1820-series.md

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