# N2668: 1940 Waco 9

- Status: Valid registration
- Airframe: [Waco 9](https://openairdocs.org/model/waco-9) (registry code 9600102, 3 seats)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Data sheets: [TCDS ATC-11](https://openairdocs.org/tcds/ATC-11) (The Waco Aircraft Company) (OpenAirDocs)
- Serial number: 306
- Year built: 1940
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Standard, normal
- Airworthiness date: November 30, 1940
- Certificate issued: February 23, 2019
- Expires: February 28, 2029
- Mode S code: A298B7
- Registered owners: [Bowe Walter C Trustee](https://openairdocs.org/faa-owner/BOWE%20WALTER%20C%20TRUSTEE), [Mendieta Carlene A Trustee](https://openairdocs.org/faa-owner/MENDIETA%20CARLENE%20A%20TRUSTEE)
- 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=2668
- Page: https://openairdocs.org/aircraft/N2668

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 (Waco 9)

None in force.

### Matched by engine (Amateur-built UNKNOWN ENG)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N2668.

## FAA accident and incident reports

None matched to N2668.

## 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) (5)

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 9)

- [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC
- [STC SA01967WI](https://openairdocs.org/stc/SA01967WI): Use of GAMI G100UL High Octane Unleaded Avgas. General Aviation Modifications Inc
- [STC SA02268CH](https://openairdocs.org/stc/SA02268CH): Installation of Airwolf Filter Corp. Air Oil Separator. Airwolf Filter Corporation
- [STC SA01406NY](https://openairdocs.org/stc/SA01406NY): Installation of Airwolf remote mounted engine oil filter kit AFC-K017 on single and multi-engine fixed light aircraft and rotary wing. 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

## Related

- Other Waco 9 aircraft: https://openairdocs.org/model/waco-9/aircraft.md
- The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.md

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