# STC SA7172SW-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 65 two axis automatic flight guidance system, Model ST-428.
- Applied: February 12, 1988
- Status date: December 8, 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/fe/4c/fe4ce45c4c06575fa5848d42f2547fc88d97201b42ae959633e49915606a5e6f
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EB8CD97DD300AA3285256CC20056A1D3.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA7172SW-D

## ADs that name it (0)

None.

## Approved models (3)

- The Cessna Aircraft Company 210A ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- The Cessna Aircraft Company 210B ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- The 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 SATI12SW-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 Cird I is Regulations.

Original Product I ypo Certificate Number: ЗА21 Make: Cessna Model: 210A, 210B, and 210C Description of Type Design Change:

Installation of S-TEC System 65 Two Axis Automatic Flight Guidance System, Model ST-428, according to Bulletin No. 528, Revision 2, dated 12-03-97 and Master Drawing List No. 92458, Revision B, dated 12-03-97 with Optional Flight Director/Steering Horizon or later FAA Approved revisions of the above data (14 Volt System).

FAA Approved Supplemental Flight Manual, P/N 89773, dated 2-16-88 is required for Cessna Model 210A or later FAA Approved revisions of the above supplement.

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

Date of Application: 2-12-88 Date of Issuance: 2-16-88

FEDERAL AVIATION Date Reissued:

Date Amended: 12-08-97, Revision 1 By Direction of the Administrator WienD Hone TOMINSTRATO William J. Thomas DAS Staff Coordinator, DAS 5 SW (Title)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA71725W-D, Revision 1 Limitations and Conditions: (con't.)

FAA/DAS Approved Supplemental Flight Manual, P/N 891610, dated 12-08-97 is required for Cessna Models 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.

FAA Form 8110-2-1 (10-69) - Page 2 of 2

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and Z1P code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and ZIP code) Exent of Authority (if licensing agreement) :

Signature of grantor (In ink :

## Every issue (1)

- December 8, 1997: Amended, Current. [certificate](https://openairdocs.org/files/sha256/fe/4c/fe4ce45c4c06575fa5848d42f2547fc88d97201b42ae959633e49915606a5e6f)

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