# N990NC: Stearman Aircraft/Northrop ALPHA 4-A

- Status: Valid registration
- Airframe: [Stearman Aircraft/Northrop ALPHA 4-A](https://openairdocs.org/model/stearman-aircraft-northrop-alpha-4-a) (registry code 8560102, 1 seats)
- Data sheets: [TCDS ATC 461](https://openairdocs.org/tcds/ATC%20461) (Stearman Aircraft Company) (OpenAirDocs)
- Serial number: 04
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Certificate issued: October 26, 2001
- Expires: July 31, 2028
- Mode S code: ADD3D2
- Registered owner: [Planes Of Fame Air Museum](https://openairdocs.org/faa-owner/PLANES%20OF%20FAME%20AIR%20MUSEUM)
- Location: [Chino, CA](https://openairdocs.org/faa-place/CA/Chino)
- Owner type: Corporation
- Owner's area on the map: 34.0051° N, 117.6825° W: Placed by OpenAirDocs at the center of ZIP code 91710, 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=990NC
- Page: https://openairdocs.org/aircraft/N990NC

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 (Stearman Aircraft/Northrop ALPHA 4-A)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N990NC.

## FAA accident and incident reports

None matched to N990NC.

## 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) (3)

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 (Stearman Aircraft/Northrop ALPHA 4-A)

- [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC
- [STC SA01282NY](https://openairdocs.org/stc/SA01282NY): Installation of Airwolf remote mounted engine oil filter kit AFC-K015 on aircraft powered by Pratt & Whitney radial reciprocating engine Series R-985, R-1340 and R-1830. Airwolf Filter Corporation
- [STC SA00680SE](https://openairdocs.org/stc/SA00680SE): Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer. Electronics International

## Related

- Other Stearman Aircraft/Northrop ALPHA 4-A aircraft: https://openairdocs.org/model/stearman-aircraft-northrop-alpha-4-a/aircraft.md

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