# STC SA7175SW-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 40/50 single and two axis automatic flight guidance system, Model ST-431-40/50.
- Applied: March 16, 1988
- Status date: March 27, 1992
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A21](https://openairdocs.org/tcds/3A21)
- Certificate PDF: https://openairdocs.org/files/sha256/d9/28/d928d601d180a8f368bf86f19785bea5ace61e0db9bf5bae3ed7790f5c34471d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7ED6DB940108B71A85256CC20056A1D6.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA7175SW-D

## ADs that name it (0)

None.

## Approved models (4)

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

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

Bcpartnot of Transportation— Jfotaal Stoiation Sdroirastration Supplemental lEgpe Certificate t-iar SA7175SW-D S-TEC Corporation 946 Pegram Wolters Industrial Park Mineral Wells, Texas 76067 ClVl'l Air 3A21 Cessna 210, 210A, 210B, and 210C Installation of S-TEC System 40/50, Single and Two Axis Automatic Flight Guidance Systems, Model ST-431-40/50, according to Bulletin No. 531, Revision 3, dated 3-20-92 and Master Drawing List No. 92471, Revision C, dated 3-20-92 and/or later FAA Approved revisions of the above data (14 Volt System).

1. FAA Approved Supplemental Flight Manual, P/N 89777, dated 3-18-88 is required for Cessna Models 210, 210A, 2108, 210C, 210-5, and 210-5A for S-TEC System 40 and/or later FAA Approved revisions of the above supplement.

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

^ ~,: 3-16-88 : 3-18-88 : 6-28-88, 11-28-89, 3-27-92 Revision 3 C&tfyat) Will/am J. Thomas DAS Staff Coordinator, DAS 5 SW_-._. ___

Tku ttrttfieatt may ir traniferrtJ in •cntibitu ualk FAR 21.17.

»AA FOM Illft-I (I0^l|

ttnad Stata of 3atria ©tpartmtnt of Transportation— federai aoiation administration Supplemental HCgpe Certificate(Continuation $hect) SA7175SW-D, Revision 3 Limitations and Conditions (con't.)

2. FAA Approved Supplemental Flight Manual, P/N 89777-1, dated 6-28-88 is required for Cessna Models 210, 210A, 210B, and 210C for S-TEC System 40 and/or later FAA Approved revisions of the above supplement.

3. FAA Approved Supplemental Flight Manual, P/N 89777-2, dated 3-27-92 is required for Cessna Models 210, 210A, 210B, and 210C for S-TEC System 40 and/or later FAA Approved revisions of the above supplement.

4. FAA Approved Supplemental Flight Manual, P/N 89778, dated 3-18-88 is required for Cessna Models 210A, 210B, and 210C for S-TEC System 50 and/or later FAA Approved revisions of the above supplement.

5. FAA Approved Supplemental Flight Manual, P/N 89778-1, dated 3-27-92 is required for Cessna Models 210, 210A, 210B, and 210C for S-TEC System 50 and/or later FAA Approved revisions of the above supplement.

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

alteration of this certificate is punishable by afint of not exceeding 11,000, or imprisonment not exceeding 3 years, or bnih.

FORM •no.2-1 (l(M»> T/ut catifcatt may *» umsftrrid in accordanci wilk I'AK .V.V* PAGE 2 OF 2 PAGES

INSTRUCTIONS : The transfer endorsement below may be used to notify the appropriate FAA Regional Office of the transfer of this Supplemental Type Certificate.

The FAA will reissue the certificate in the name of the transferre and forward it to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Vacant of transferee) (Address of transferee) (ffymSer and street) (City, State, andZlT code.)

from($jame of grantor) (Print or type) ___ ___ (Address of grantor) _ (O^umter ami street) (City, State, andZlf code) Exent of Authority (if licensing agreement) :

Signature of grantor (In i Page 2 of 2

## Every issue (1)

- March 27, 1992: Amended, Current. [certificate](https://openairdocs.org/files/sha256/d9/28/d928d601d180a8f368bf86f19785bea5ace61e0db9bf5bae3ed7790f5c34471d)

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