# STC SA09307AC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-743-20/30.
- Applied: November 11, 1997
- Status date: November 14, 1997
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A7CE](https://openairdocs.org/tcds/A7CE)
- Certificate PDF: https://openairdocs.org/files/sha256/eb/10/eb105e1d8193c2ebfeaeb4c4560e9a06c7fb321c2f0d719af52a52bd55aa38c4
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F5E206B23DC1452985256CC1007F3A7A.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09307AC-D

## ADs that name it (0)

None.

## Approved models (6)

- Cessna Aircraft Company 401 ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))
- Cessna Aircraft Company 401A ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))
- Cessna Aircraft Company 401B ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))
- Cessna Aircraft Company 402A ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))
- Cessna Aircraft Company 402B ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))
- Cessna Aircraft Company 402C ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))

## 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: SA0930TAC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Part 3 of the Civid I is Regulations.

Original Product I ype Cerlificate Number: A7CE Make: Cessna Al cdel: 401, 401A, 401B, 402A, 402B, and 402C Description of Type Design Change:

Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-743-20/30, according to Bulletin No. 843, dated 11-10-97 and Master Drawing List No. 921046, dated 11-10-97 or later FAA Approved revisions of the above data (28 Volt System).

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891590, dated 11-14-97 is required for Cessna Models 401, 401A, and 401B for S-TEC System 20 or later FAA Approved revisions of the above supplement.

(See Continuation Sheet, Page 2, a part of this STC.)

Date of Application: 11-11-97 Date Reissued:

Date of Issuance: 11-14-97 Date Amended:

By Direction of the Administrator FEDERAL AVIATION Wiin Thoma Signature TOMNISTRATIO William J. Thomas DAS Staff Coordinator, DAS 5 SW (Title)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09307AC-D Limitations and Conditions: (con't.)

2 FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891591, dated 11-14-97 is required for Cessna Models 402A and 402B for S-TEC System 20 or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891592, dated 11-14-97 is required for Cessna Model 402C for S-TEC System 20 or later FAA Approved revisions of the above supplement.

System 30 or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891594, dated 11-14-97 is required for Cessna Models 402A and 402B for S-TEC System 30 or later FAA Approved revisions of the above supplement.

6. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891595, dated 11-14-97 is required for Cessna Model 402C for S-TEC System 30 or later FAA Approved revisions of the above supplement.

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

Signature of grantor (In ink):

## Every issue (1)

- November 14, 1997: Issued, Current. [certificate](https://openairdocs.org/files/sha256/eb/10/eb105e1d8193c2ebfeaeb4c4560e9a06c7fb321c2f0d719af52a52bd55aa38c4)

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