# STC SA8905SW-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-573, with optional autotrim system.
- Status date: November 6, 2001
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A23](https://openairdocs.org/tcds/3A23)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AC89668B32DCD6B985256CC20058E96F.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA8905SW-D

## ADs that name it (0)

None.

## Approved models (1)

- Maule Aerospace Technology Inc. Bee Dee MT-7-235 ([TCDS 3A23](https://openairdocs.org/tcds/3A23))

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