# STC SA09204AC-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 55/55X Two Axis Automatic Flight Guidance System, Model ST-659,
- Applied: March 7, 1997
- Status date: July 20, 2001
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A34CE](https://openairdocs.org/tcds/A34CE)
- Certificate PDF: https://openairdocs.org/files/sha256/24/9f/249fd6110df2a854d6a110532c31ce9864b64cbcd81533c8224b384e6bf180fc
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7EFDE7EA87C594B285256CC1007F3A11.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09204AC-D

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company T303 ([TCDS A34CE](https://openairdocs.org/tcds/A34CE))

## 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: SA09204 AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 #'ast 23 of the Federal s/ vation Regulations.

Original Product I ype Certificate A unter: A34CE CESSNA Model: T303 Description of Type Design Change:

Installation of S-TEC System 55/55X Two Axis Automatic Flight Guidance System, Model ST-659, according to Bulletin No. 759, Revision 1, dated 7-20-01 and Master Drawing List No. 92977, Revision A, dated 7-20-01 or later FAA Approved revisions of the above data (28 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: 3-07-97 Late wisued :

Gate of isnance: 4-17-97 Date Amended: 7-20-01 By Direction of the Administrator FEDERAL AVIATION meer (Signature) TOMINSTRATO DAS Staff Coordinator, DAS 5 SW Michael Keirnan (Title) a fine of not exceeding $1, 000, or imprisonment not exceeding 3 years, or both.

PAA Form 8110-2 (10-68)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Shert) Number: SA09204AC-D FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement P/N 891348, dated 4-17-97, is required for Cessna Model T303 or later FAA Approved revisions of the above supplement.

2. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891348, Revision 1, dated 7-20-01 is required for Cessna model T303 for S-TEC System 55/55X or later FAA Approved revisions of the above supplement.

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

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

The FAR will teissue 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 & street) (City, State, and ZIP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- July 20, 2001: Amended, Current. [certificate](https://openairdocs.org/files/sha256/24/9f/249fd6110df2a854d6a110532c31ce9864b64cbcd81533c8224b384e6bf180fc)

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