# STC SA09299AC-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-752-20/30.
- Applied: November 4, 1997
- Status date: November 6, 1997
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A13CE](https://openairdocs.org/tcds/A13CE)
- Certificate PDF: https://openairdocs.org/files/sha256/a2/49/a249341239573bbeedde6d0caa8decd7209b8bd15350e16205c37667ba29e28e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2DE5AF1DC1C1027285256CC1007F3A75.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09299AC-D

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company 177B ([TCDS A13CE](https://openairdocs.org/tcds/A13CE))

## 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: SA09299 AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Part 23 of the Federal A viation Regulations.

Original Product I уре Cerlifcate Number: A13CE Make: Cessna Model.: 177B Description of Type Design Change:

Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-752-20/30, according to Bulletin No. 852, dated 11-03-97 and Master Drawing List No. 921043, dated 11-03-97 or later FAA Approved revisions of the above data (28 Volt System).

FAA/DAS Approved Supplemental Flight Manual, P/N 891581, dated 11-06-97 is required for Cessna Model 177B for S-TEC System 20 or later FAA Approved revisions of the above supplement.

2. FAA/DAS Approved Supplemental Flight Manual, P/N 891583, dated 11-06-97 is required for Cessna Model 177B for S-TEC System 30 or later FAA Approved revisions of the above supplement.

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

Date of Application: 11-04-97 Date Reissued:

Date of Issuance: 11-06-97 Date Amended:

By Direction of the Administrator FEDERAL AVIATION Wirin mues TOMINISTRATIO DAS Staff Coordinator, DAS 5 SW William J. Thomas (Title)

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)

- November 6, 1997: Issued, Current. [certificate](https://openairdocs.org/files/sha256/a2/49/a249341239573bbeedde6d0caa8decd7209b8bd15350e16205c37667ba29e28e)

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