# STC SA09427AC-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, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 3A17](https://openairdocs.org/tcds/3A17)
- Certificate PDF: https://openairdocs.org/files/sha256/e6/49/e649c24ad1fec03e93939238e17c71c38d37c23f08b9684b048a62bfb359e084
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1F306BBFE9F4F27885256CC1007F3AF8.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09427AC-D

## ADs that name it (0)

None.

## Approved models (5)

- Cessna Aircraft Company R172E ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Cessna Aircraft Company R172F ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Cessna Aircraft Company R172G ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Cessna Aircraft Company R172H ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Cessna Aircraft Company R172K ([TCDS 3A17](https://openairdocs.org/tcds/3A17))

## 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: SA09427 AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, IX 76067-9236 Part 3 of the Cied An Regulations.

Original Product Type Certificate A umber: ЗА17 Make: Cessna Model: R172E (USAF T-41B, USAF 1-41C, and USAF T-41D), R172F (USAF T-41D), R172G (USAF T-41C or USAF T-41D), R172H (USAF T-41D), and R172K 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 (Signature) TOMINSTRATIOR Michael Keirnan DAS Staff Coordinator, DAS 5 SW (Title)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09427AC-D Limitations and Conditions: (con't.)

1. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891917, dated 3-17-00 for Cessna models R172E (USAF T-41B, USAF T-41C, and USAF T-41D), R172F (USAF T-41D), R172G (USAF T-41C or USAF T-41D), R172H (USAF T-41D), and R172K for S-TEC System 40X 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 891923, dated 3-17-00 for Cessna models R172E (USAF T-41B, USAF T-41C, and USAF T-41D), R172F (USAF T-41D), R172G (USAF T-41C or USAF T-41D), R172H (USAF T-41D), and R172K for S-TEC System 50X 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.

FAA Form 8110-2-1 (10-69) Page 2 or 2 ficate may be transferzed in accordence with FAR 21.47.

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)

- March 17, 2000: Issued, Current. [certificate](https://openairdocs.org/files/sha256/e6/49/e649c24ad1fec03e93939238e17c71c38d37c23f08b9684b048a62bfb359e084)

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