# STC SA09426AC-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 3A12](https://openairdocs.org/tcds/3A12)
- Certificate PDF: https://openairdocs.org/files/sha256/27/0b/270b2da74e342b4bc32ca19864edd3dc18c6f0ad4d96a3c380889e872b0d38b4
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/83B76704A32C20F485256CC1007F3AF7.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09426AC-D

## ADs that name it (0)

None.

## Approved models (2)

- Cessna Aircraft Company 172R ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172S ([TCDS 3A12](https://openairdocs.org/tcds/3A12))

## 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: SA09426AC-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 following product with the limitations and conditions therefor as specifeed horeon meets the aiworthiness requiroments of I at 23 of the Federal A viation Regulations.

Original Product Type Certificate Number: ЗА12 Make: Cessna Model: 172R and 172S 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 Reissued:

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

By Direction of the Administrator FEDERAL AVIATION mill Kei (Signature) TOMNISTRATOR Michael Keirnan DAS Staff Coordinator, DAS 5 SW (Title)

FAA Form 6110-2(10-68) Page 1 of 2

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09426AC-D Limitations and Conditions: (con't.)

1. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891916, dated 3-17-00 for Cessna models 172R and 172S for S-TEC System 40X or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891922, dated 3-17-00 for Cessna models 172R and 172S for S-TEC System 50X or later FAA Approved revisions of the above supplement.

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

by a fine of not exceeding 91,000, or imprisonment not exceeding 3 years, or both.

FAA Form 8110- age 2 of 2 This certificate may be transferred in accordance with FAR 21.17.

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/sha256/27/0b/270b2da74e342b4bc32ca19864edd3dc18c6f0ad4d96a3c380889e872b0d38b4)

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