# STC SA09434AC-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-783-40X/50X.
- Applied: March 21, 2000
- Status date: March 23, 2000
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A20CE](https://openairdocs.org/tcds/A20CE)
- Certificate PDF: https://openairdocs.org/files/sha256/ef/64/ef64a49ce494c6373a73ecd870b5353ab619fb9b1cc465688be0f57c25ad689d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/50CFF32C2AAEC34A85256CC1007F3AFE.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09434AC-D

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company 177RG ([TCDS A20CE](https://openairdocs.org/tcds/A20CE))

## 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: SA09434AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Part 23 of the Federal d viation Regulations.

Original Product I ype Cerlificate Number: A20CE Make: Cessna Model: 177RG Description of Type Design Change:

Installation of S-TEC System 40X/50X Single and Two Axis Automatic Flight Guidance Systems, Model ST-783-40X/50X, according to Bulletin No. 883, dated 3-20-00 and Master Drawing List No. 921174, dated 3-20-00 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: 3-21-00 Date Reissued:

Date of Issuance: 3-23-00 Date Amended:

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

FAA Forn 8110-2(10-68) Page 1 of 2

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09434 AC-D Limitations and Conditions: (con't.)

1. FAA/DAS Approved Supplemental Flight Manual, P/N 891948, dated 3-23-00 for Cessna model 177RG, S/N 177RG0787 and below 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 891949, dated 3-23-00 for Cessna model 177RG, S/N 177RG0788 through S/N 177RG1266 for S-TEC System 40X or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Supplemental Flight Manual, P/N 891953, dated 3-23-00 for Cessna model 177RG, S/N 177RG0787 and below for S-TEC System 50X or later FAA Approved revisions of the above supplement.

4. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891954, dated 3-23-00 for Cessna model 177RG, S/N 177RG0788 through S/N 177RG1266 for S-TEC System 50X or later FAA Approved revisions of the above supplement.

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

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

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 and street) (City, State, and ZIP code ) Extent of Authority (if licensing agreement): - Date of Transfer:

Signature of grantor (In ink):

## Every issue (1)

- March 23, 2000: Issued, Current. [certificate](https://openairdocs.org/files/sha256/ef/64/ef64a49ce494c6373a73ecd870b5353ab619fb9b1cc465688be0f57c25ad689d)

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