# Stearman Aircraft/Northrop ALPHA 4-A

- Type: Aircraft model (FAA registry)
- Registry code: 8560102
- Manufacturer (registry): STEARMAN AIRCRAFT/NORTHROP
- Model: ALPHA 4-A
- Aircraft type: Fixed wing single engine
- Category: Airplane
- Engines: 1 · Reciprocating
- Seats: 1
- Weight class: Up to 12,499 lb
- Cruise speed: 96 mph
- Certification: Type certificated
- Data sheet: [TCDS ATC 461](https://openairdocs.org/tcds/ATC%20461) (OpenAirDocs)
- Holder: Stearman Aircraft Company
- Registered aircraft: 1
- Page: https://openairdocs.org/model/stearman-aircraft-northrop-alpha-4-a

Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker.

## ADs that may apply (OpenAirDocs)

Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

None matched.

## Registered aircraft (1)

- [N990NC](https://openairdocs.org/aircraft/N990NC): [Planes Of Fame Air Museum](https://openairdocs.org/faa-owner/PLANES%20OF%20FAME%20AIR%20MUSEUM), [Chino, CA](https://openairdocs.org/faa-place/CA/Chino), S/N 04

## NTSB investigations

None matched to aircraft with this model.

## FAA accident and incident reports

None matched to aircraft with this model.

## STCs that may be installed (OpenAirDocs) (3)

Approved for this model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has.

- [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

## PMA parts (OpenAirDocs) (3)

Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this model on its data sheet, so check the FAA record before relying on it. Newest first.

- [S1069](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID176648042420260806152339.0001): 100R Fuel Placard. Swift Fuels, LLC · PMA PQ04423CE · Modification part · Jul 20, 2026
- [73-CFG-R](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID130712949120260806152432.0001): Fuel Quantity Indication Placard. Swift Fuels, LLC · PMA PQ04423CE · Modification part · Jul 20, 2026
- [V674UL94](https://drs.faa.gov/browse/excelExternalWindow/E1C1EF6CEE5DC2EE862585990051C803.0001): UL94 Fuel Placard. Swift Fuels, LLC · PMA PQ04423CE · Modification part · Jun 7, 2020

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.