# STC SA09398AC-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-851-20/30.
- Applied: December 15, 1998
- Status date: December 17, 1998
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A51EU](https://openairdocs.org/tcds/A51EU)
- Certificate PDF: https://openairdocs.org/files/sha256/c7/38/c7382446d81b972b1764dcc08ed1d29f85997f57741bfbbd52fd9a6918dec17a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D43EF2BE70FDDB8485256CC1007F3ADF.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09398AC-D

## ADs that name it (0)

None.

## Approved models (5)

- SOCATA TB 10 ([TCDS A51EU](https://openairdocs.org/tcds/A51EU))
- SOCATA TB 20 ([TCDS A51EU](https://openairdocs.org/tcds/A51EU))
- SOCATA TB 200 ([TCDS A51EU](https://openairdocs.org/tcds/A51EU))
- SOCATA TB 21 ([TCDS A51EU](https://openairdocs.org/tcds/A51EU))
- SOCATA TB9 ([TCDS A51EU](https://openairdocs.org/tcds/A51EU))

## 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: SA09398 AC-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 fettoring product with the limitations and conditions Berefor as specifed hercen meets the aircosthiness requiements of Last 25 of the Foleral I viation Regulutions.

Original Freduel F ype Certifeate A umber: A51EU Make: Socata Model: TB 9, TB 10, TB 20, TB 21, and TB 200 (Groupe Aerospatiale) Description of Type Design Change:

Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-851-20/30, according to Bulletin No. 951, dated 12-14-98 and Master Drawing List No. 921137, dated 12-14-98 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: 12-15-98 Date Reissued:

Date of Issuance: 12-17-98 Date Amended:

By Direction of the Administrator FEDERAL AVIATION mall k (Signature) TOMINISTRATO 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: SA09398AC-D Limitations and Conditions: (con't.)

1. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891826, dated 12-17-98 is required for Socata models TB 9, TB 10, and TB 200 (Groupe Aerospatiale) for S-TEC System 20 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 891827, dated 12-17-98 is required for Socata models TB 20 and TB 21 (Groupe Aerospatiale) 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 891828, dated 12-17-98 is required for Socata models TB 9, TB 10, and TB 200 (Groupe Aerospatiale) for S-TEC System 30 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 891829, dated 12-17-98 is required for Socata models TB 20 and TB 21 (Groupe Aerospatiale) 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)

- December 17, 1998: Issued, Current. [certificate](https://openairdocs.org/files/sha256/c7/38/c7382446d81b972b1764dcc08ed1d29f85997f57741bfbbd52fd9a6918dec17a)

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