# STC SA903SO

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Keith Wilson Aircraft Inc, United States
- Description: Reposition of fuel pump.
- Status date: July 30, 1976
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1A3](https://openairdocs.org/tcds/1A3), [TCDS A18CE](https://openairdocs.org/tcds/A18CE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F2C16B74E0072D3D85256CC20058EA08.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA903SO

## ADs that name it (0)

None.

## Approved models (5)

- Bellanca Aircraft Corporation 17-30 ([TCDS 1A3](https://openairdocs.org/tcds/1A3))
- Bellanca Aircraft Corporation 17-30A ([TCDS A18CE](https://openairdocs.org/tcds/A18CE))
- Bellanca Aircraft Corporation 17-31 ([TCDS 1A3](https://openairdocs.org/tcds/1A3))
- Bellanca Aircraft Corporation 17-31A ([TCDS A18CE](https://openairdocs.org/tcds/A18CE))
- Bellanca Aircraft Corporation 17-31ATC ([TCDS A18CE](https://openairdocs.org/tcds/A18CE))

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