# STC SA09428AC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 40X/50X single and two axis automatic flight guidance systems, Model ST-868-40X/50X.
- Applied: March 15, 2000
- Status date: March 17, 2000
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A4EU](https://openairdocs.org/tcds/A4EU)
- Certificate PDF: https://openairdocs.org/files/sha256/94/65/9465b45e439336c5adbf0fc695993455845c68bf915dabc2cb4815cd3749d916
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0580817A14FE795085256CC1007F3AF9.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09428AC-D

## ADs that name it (0)

None.

## Approved models (3)

- Cessna Aircraft Company F172M ([TCDS A4EU](https://openairdocs.org/tcds/A4EU))
- Cessna Aircraft Company F172N ([TCDS A4EU](https://openairdocs.org/tcds/A4EU))
- Cessna Aircraft Company F172P ([TCDS A4EU](https://openairdocs.org/tcds/A4EU))

## 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: SA09428 AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Past 3 of the bird Air Kegulations.

Originat I seduct Type Certificate Number: A4EU Make: Reims Aviation S.A. Models Cessna Model: F172M, F172N, and F172P Description of Type Design Change:

Installation of S-TEC System 40X/50X Single and Two Axis Automatic Flight Guidance Systems, Model ST-868-40X/50X, according to Bulletin No. 968, dated 3-14-00 and Master Drawing List No. 921169, dated 3-14-00 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: 3-15-00 Date voised :

Date of Issuance: 3-17-00 Date Amended:

By Direction of the Administrator FEDERAL AVIATION (Signature) TOMINSTRATO Michael Keirnan DAS Staff Coordinator, DAS 5 SW (Title) Any alteration of this ble by a fine of not exceeding $l,000, or imprisonment not exreeding 3 years, or both.

FAA Form 6110-2 (10-68)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09428AC-D Limitations and Conditions: (con't.)

1. Also eligible on F172M, F172N, and F172P when modified by 180 H.P. engine conversion.

2. FAA/DAS Approved Supplemental Flight Manual, P/N 891918, dated 3-17-00 for 1. Reims Aviation S.A. Models Cessna F172M, F172N, and F172P; 2. Reims Aviation S.A. Models Cessna F172M, F172N, and F172P when modified by 180 H.P. engine conversion for S-TEC System 40X or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Supplemental Flight Manual, P/N 891924, dated 3-17-00 for 1. Reims Aviation S.A. Models Cessna F172M, F172N, and F172P; 2. Reims Aviation S.A. Models Cessna F172M, F172N, and F172P when modified by 180 H.P. engine conversion for S-TEC System 50X or later FAA Approved revisions of the above supplement.

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

000, or imprisonment not exceeding 3 vears, or both.

FAA Form 0110-2-1 (10-69) Page 2 of

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)

- March 17, 2000: Issued, Current. [certificate](https://openairdocs.org/files/sha256/94/65/9465b45e439336c5adbf0fc695993455845c68bf915dabc2cb4815cd3749d916)

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