# STC SA09315AC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 30 ALT Altitude Hold System, Model ST-756.
- Applied: December 11, 1997
- Status date: December 15, 1997
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A21](https://openairdocs.org/tcds/3A21)
- Certificate PDF: https://openairdocs.org/files/sha256/b5/a7/b5a7f6b9c9ad8783cf47243de4a82e572ab6a9f73ecb1f2dd814cd3dea76a583
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6533A7C2772CC28085256CC1007F3A82.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09315AC-D

## ADs that name it (0)

None.

## Approved models (4)

- Cessna Aircraft Company 210 ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210A ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210B ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210C ([TCDS 3A21](https://openairdocs.org/tcds/3A21))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA09315AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Certifies that the change in the type design for the following product with the livitations and conditions therefor as specifed horeon meets the aiworthiness requiements of Fart 3 of the Civil Li Regulations.

Original Product I ype Cerlifeate A umber: ЗА21 Make: Cessna Model: 210, 210A, 210B, and 210C Description of Type Design Change:

Installation of S-TEC System 30 ALT Altitude Hold System. Model ST-756, according to Bulletin No 856, dated 12-10-97 and Master Drawing List No. 921054, dated 12-10-97 or later FAA Approved revisions of the above data (14 Volt System).

FAA/DAS Approved Supplemental Flight Manual, P/N 891613, dated 12-15-97 is required for Cessna Models 210, 210A, 210B, and 210C or later FAA Approved revisions of the above supplement.

Compatibility of this modification with other previously approved modifications must be determined by the installer.

suspended, vevoked or a termination date is otherase established by the / dministrator of the Federal ¾ viation Administration.

Date of Application: 12-11-97 Date Reissued:

Date of Issuance: 12-15-97 Date Amended:

By Direction of the Administrator FEDERAL AVIATION Wien Summe TOMINISTRATIOS William J. Thomas DAS Staff Coordinator, DAS 5 SW (Title)

FAA Forn 8110-2 (10-68) Page 1 of 1

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) - (Address of transferee) _ (Number and street) (City, State, and ZIP code) from (Name of grantor) (Print or type) (Address of grantor) (Number & street) (City, State, and ZIP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink) :

## Every issue (1)

- December 15, 1997: Issued, Current. [certificate](https://openairdocs.org/files/sha256/b5/a7/b5a7f6b9c9ad8783cf47243de4a82e572ab6a9f73ecb1f2dd814cd3dea76a583)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.