# N126SD: Stephen Denmark RV-9A

- Status: Valid registration
- Airframe: [Stephen Denmark RV-9A](https://openairdocs.org/model/stephen-denmark-rv-9a) (registry code 05631C9, 2 seats)
- Engine: [Aerosport O/IO-320 series](https://openairdocs.org/engine/aerosport-o-io-320-series) (registry code 01307)
- Serial number: 91709
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Vans Aircraft Inc RV-9A
- Airworthiness: Experimental, amateur built
- Airworthiness date: October 6, 2014
- Certificate issued: October 3, 2011
- Expires: October 31, 2027
- Mode S code: A06B90
- Registered owner: [Denmark Stephen](https://openairdocs.org/faa-owner/DENMARK%20STEPHEN)
- Location: [Santa Cruz, CA](https://openairdocs.org/faa-place/CA/Santa%20Cruz)
- Owner type: Individual
- Owner's area on the map: 37.0322° N, 121.9844° W: Placed by OpenAirDocs at the center of ZIP code 95065, 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=126SD
- Page: https://openairdocs.org/aircraft/N126SD

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 Aerosport O/IO-320 model are included.

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

### Matched by airframe (Stephen Denmark RV-9A)

None in force.

### Matched by engine (Aerosport O/IO-320 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N126SD.

## FAA accident and incident reports

None matched to N126SD.

## 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 Stephen Denmark RV-9A aircraft: https://openairdocs.org/model/stephen-denmark-rv-9a/aircraft.md
- The Aerosport O/IO-320 series engine: https://openairdocs.org/engine/aerosport-o-io-320-series.md

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