# STC SA8889SW-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 55 Two Axis Automatic Flight Guidance System, model ST-558, with Optional Automatic Electric Trim System. Eligible when modified per STC SA1525WE (Robertson STOL).
- Status date: July 2, 2001
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A21](https://openairdocs.org/tcds/3A21)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FFA8EE0BDEE587B485256CC20058E954.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA8889SW-D

## ADs that name it (0)

None.

## Approved models (4)

- The Cessna Aircraft Company 210D ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- The Cessna Aircraft Company 210E ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- The Cessna Aircraft Company 210F ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- The Cessna Aircraft Company T210F ([TCDS 3A21](https://openairdocs.org/tcds/3A21))

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