# N11473: 1931 Waco QDC

- Status: Valid registration
- Airframe: [Waco QDC](https://openairdocs.org/model/waco-qdc) (registry code 9600504, 4 seats)
- Engine: [Continental R670-SERIES series](https://openairdocs.org/engine/continental-r670-series-series) (registry code 17016)
- Data sheets: [TCDS ATC 412](https://openairdocs.org/tcds/ATC%20412) (The Waco Aircraft Company) (OpenAirDocs)
- Serial number: 3514
- Year built: 1931
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Standard
- Airworthiness date: June 26, 1957
- Certificate issued: March 17, 2023
- Expires: March 31, 2030
- Mode S code: A03E78
- Registered owners: [Bowe Walter C](https://openairdocs.org/faa-owner/BOWE%20WALTER%20C), [Mendieta Carlene A](https://openairdocs.org/faa-owner/MENDIETA%20CARLENE%20A)
- Location: [Sonoma, CA](https://openairdocs.org/faa-place/CA/Sonoma)
- Owner type: Co-owned
- Owner's area on the map: 38.2558° N, 122.4609° W: Placed by OpenAirDocs at the center of ZIP code 95476, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=11473
- Page: https://openairdocs.org/aircraft/N11473

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 Continental R670-SERIES model are included.

## ADs that may apply (OpenAirDocs): 1 in force

### Matched by airframe (Waco QDC)

None in force.

### Matched by engine (Continental R670-SERIES series)

- [AD 95-21-15](https://openairdocs.org/ad/95-21-15): Aviation Gasoline · Continental Motors A-65-8, C85-12F, C85-12FJ and 77 more. Effective Nov 28, 1995

### Historical (superseded or no longer in force)

- [AD 94-14-12](https://openairdocs.org/ad/94-14-12) (historical): Octane Aviation Gasoline · Teledyne Continental Motors A-65-8, C85-12, E185-11 and 68 more

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N11473.

## FAA accident and incident reports

None matched to N11473.

## 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) (6)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the airframe (Waco QDC)

- [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC
- [STC SA00079NY](https://openairdocs.org/stc/SA00079NY): Installation of Airwolf remote mounted engine oil filter kit AFC-K008 on single and multi engine fixed wing light aircraft incorporating Teledyne Continental reciprocating engines of 450 horsepower or less. Airwolf Filter Corporation
- [STC SA02033AT](https://openairdocs.org/stc/SA02033AT): Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line. M-20 Oil Separators LLC
- [STC SA4005NM](https://openairdocs.org/stc/SA4005NM): Precise Flight Inc. Pulselite Control System. Precise Flight Inc

### Approved for the engine (Continental R670-SERIES series)

- [STC SE04651CH](https://openairdocs.org/stc/SE04651CH): To allow use of l00R grade aviation fuel meeting Swift Fuel, LLC specification SPEC-l00R-22. Swift Fuels LLC. Lists R-670-B
- [STC SE5879SW](https://openairdocs.org/stc/SE5879SW): Use of Phillips X/C II 20W-50 and25W-60 oil (OSS 55875) in all Avco reciprocating aircraft engines from 65 to 450 BHP. Phillips Petroleum Co

## Related

- Other Waco QDC aircraft: https://openairdocs.org/model/waco-qdc/aircraft.md
- The Continental R670-SERIES series engine: https://openairdocs.org/engine/continental-r670-series-series.md

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