# STC SA3890WE

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Steward-Davis, Inc, United States
- Description: Installation of Wright R-1820-40, -60, -71, -87 engine and Hamilton Standard 33D50 or 43D50 constant speed propeller. (S2R RESTRICTED CATEGORY)
- Status date: May 18, 1979
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A4SW](https://openairdocs.org/tcds/A4SW)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D963E23BA6F9668985256CC2000C5B5E.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3890WE

## ADs that name it (0)

None.

## Approved models (1)

- Ayres Corporation S2R ([TCDS A4SW](https://openairdocs.org/tcds/A4SW))

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