# STC SA09453AC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 20/30 single and two-axis automatic flight guidance systems, model ST-876-20/30.
- Applied: June 8, 2001
- Status date: June 12, 2001
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A21](https://openairdocs.org/tcds/3A21)
- Certificate PDF: https://openairdocs.org/files/sha256/ed/30/ed30ddefbeb2badfb19d4d89364641e3b0fc6d4b309416328f71216ccc62bf19
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A338B93A56D8191785256CC1007F3B12.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09453AC-D

## ADs that name it (0)

None.

## Approved models (4)

- Cessna Aircraft Company 210D ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210E ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210F ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210F ([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: SA09453 AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Part 3 of the Civil Air Regulations.

Original Product Type Certificate Number: 3A21 Make: Cessna Model: 210D, 210E, 210F, and T210F Description of Type Design Change:

Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-876-20/30, according to Bulletin No. 976, dated 6-07-01 and Master Drawing List No. 921186, dated 6-07-01 or later FAA Approved revisions of the above data (14 Volt System).

(See Continuation Sheet, Page 2, a part of this STC.)

If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission •

Date of Application: 6-08-01 Late weissaed:

Date of Issuance: . 6-12-01 Date Amended:

By Direction of the Administrator FEDERAL AVIATION MilK (Signature) POMINSTRATCH Michael Keirnan DAS Staff Coordinator, DAS 5 SW (Title)

FAR Porm 8110-2 (10-68) Page 1 of

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09453 AC-D Limitations and Conditions: (con't.)

Also eligible on the above models when modified per STC SA1525WE (Robertson STOL) or STC SA1048CE (Horton STOL).

FAA/DAS Approved Supplemental Flight Manual, P/N 892034, dated 6-12-01 is required for Cessna models 210D, 210E, 210F, and T210F and these models when modified per STC SA1525WE (Robertson STOL) or STC SA1048CE (Horton STOL) for S-TEC System 20 or later FAA Approved revisions of the above supplement, FAA/DAS Approved Supplemental Flight Manual, P/N 892035, dated 6-12-01 is required for Cessna models 210D, 210E, 210F, and T210F and these models when modified per STC SA1525WE (Robertson STOL) or STC SA1048CE (Horton STOL) for S-TEC System 30 or later FAA Approved revisions of the above supplement.

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

FAA Porm 8110-2 (10-68) Page 2 of 2

INSTRUCTIONS. The transfer endorsement below may be used to notify the appropriate FAA Pegional Office of the transfer of this Supplemental Type Certificate The FAA will reissue the certificate in the name of the transferee and forward it to him.

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 and street) (City, State, and ZIP code ).

Signature of grantor (In ink):

## Every issue (1)

- June 12, 2001: Issued, Current. [certificate](https://openairdocs.org/files/sha256/ed/30/ed30ddefbeb2badfb19d4d89364641e3b0fc6d4b309416328f71216ccc62bf19)

---
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.