# STC SA09305AC-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-742.
- Applied: November 6, 1997
- Status date: November 10, 1997
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A26EU](https://openairdocs.org/tcds/A26EU)
- Certificate PDF: https://openairdocs.org/files/sha256/68/74/6874e9485a20b5722481a3b28c19528ac0b6a3534efcee877ca0aa49c0cf661d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DC721AF1ED3C9D0185256CC1007F3A78.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09305AC-D

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company F177RG ([TCDS A26EU](https://openairdocs.org/tcds/A26EU))

## 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: SA09305 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 ype Cerlifeate A umber: A26EU Al aho: Reims Aviation S.A. Model Cessna Model: F177RG Description of Type Design Change:

Installation of S-TEC System 30 ALT Altitude Hold System, Model ST-742, according to Bulletin No. 842, dated 11-05-97 and Master Drawing List No. 921044, dated 11-05-97 or later FAA Approved revisions of the above data (14 Volt System).

PAA/DAS Approved Supplemental Flight Manual, P/N 891589, dated 11-10-97 is required for Reims Aviation S.A. Model Cessna F177RG or later FAA Approved revisions of the above supplement.

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

Date of Application: 11-06-97 Date Reissued:

Date of Issuance: 11-10-97 Date Amended:

By Direction of the Administrator FEDERAL AVIATION Wicin ano (Signature) TOMNISTRATIO William J. Thomas DAS Staff Coordinator, DAS 5 SW (Title)

47.

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 10, 1997: Issued, Current. [certificate](https://openairdocs.org/files/sha256/68/74/6874e9485a20b5722481a3b28c19528ac0b6a3534efcee877ca0aa49c0cf661d)

---
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.