# STC SA09412AC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC manual electric trim system, Model ST-157
- Status date: August 25, 1999
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8744E992DCADCD4785256CC1007F3AE9.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09412AC-D

## ADs that name it (0)

None.

## Approved models (2)

- The Cessna Aircraft Company 172R ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172S ([TCDS 3A12](https://openairdocs.org/tcds/3A12))

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