# STC SA09135AC-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-612,
- Applied: November 29, 1995
- Status date: February 28, 2001
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A18EU](https://openairdocs.org/tcds/A18EU)
- Certificate PDF: https://openairdocs.org/files/sha256/9d/34/9d3479867ecc9f4f0de79efd78db77e568de784b0fd7f25641fe83c2cbee23ec
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/80FEDB4D742F634285256CC1007F39D8.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09135AC-D

## ADs that name it (0)

None.

## Approved models (2)

- Cessna Aircraft Company FR172J ([TCDS A18EU](https://openairdocs.org/tcds/A18EU))
- Cessna Aircraft Company FR172K ([TCDS A18EU](https://openairdocs.org/tcds/A18EU))

## 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: SA09135 AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Certifies that the change in the type design for the follocing froduct with the timitations and conditions therefor as specified hewon meets the aireothiness requiements of I art 3 of the Cirl shi Requlations.

Original Product I ype Costipeate A umter: A18EU Make: Reims Aviation S.A. Cessna Model: FR172J and FR172K Description of Type Design Change:

Installation of S-TEC System 55/55X Two Axis Automatic Flight Guidance System, Model ST-612, according to Bulletin No. 712, Revision 2, dated 2-28-01 and Master Drawing List No. 92827, Revision B, dated 2-28-01 or later FAA Approved revisions of the above data (14 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: 11-29-95 Bate wisued:

Date of Issuance: 12-04-95 Date Amended: 2-28-01 By Direction of the Administrator FEDERAL AVIATION Mike i (Signature) TOMINSTRATO Michael Keiran DAS Staff Coordinator, DAS 5 SW (Title)

47.

The EAA will reissue the certificate in the name of the transferee and forward it to Sim.

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):

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09135 AC-D Limitations and Conditions: (con't.)

FAA/DAS Approved Supplemental Flight Manual, P/N 891223, dated 12-04-95 is required or later FAA Approved revisions of the above supplement.

2. FAA/DAS Approved Supplemental Flight Manual, P/N 891223, Revision 1, dated 2-28-01 is required for Reims Aviation S.A. Cessna models FR172J and FR172K for S-TEC System 55/55X or later FAA Approved revisions of the above supplement.

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

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

## Every issue (1)

- February 28, 2001: Amended, Current. [certificate](https://openairdocs.org/files/sha256/9d/34/9d3479867ecc9f4f0de79efd78db77e568de784b0fd7f25641fe83c2cbee23ec)

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