# STC SA09393AC-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-843-20/30.
- Applied: September 11, 1998
- Status date: February 16, 1999
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A3](https://openairdocs.org/tcds/2A3)
- Certificate PDF: https://openairdocs.org/files/sha256/d9/2c/d92cba69c43c4e22a023f903c7a88fde26798a2429bcb553c2e8b042fdbd84a6
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4EF2585D8ADA2F6A85256CC1007F3AD9.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09393AC-D

## ADs that name it (0)

None.

## Approved models (4)

- Mooney International Corporation M20L ([TCDS 2A3](https://openairdocs.org/tcds/2A3))
- Mooney International Corporation M20M ([TCDS 2A3](https://openairdocs.org/tcds/2A3))
- Mooney International Corporation M20R ([TCDS 2A3](https://openairdocs.org/tcds/2A3))
- Mooney International Corporation M20S ([TCDS 2A3](https://openairdocs.org/tcds/2A3))

## 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: SA09393 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 fellowing freduct with the limitations and conditions therefor as specified heicen meet the airrertheness teguement of Pt 3 ef the Livl In Regulations and FAB 23 of the Fedeut-Lvintion Kegulatiens.

Original Product F ype Cestifeate A umber : 2A3 Make: Mooney Model: M2OL, M20M, M20R, and M20S Description of Type Design Change:

Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-843-20/30, according to Bulletin No. 943, Revision 1, dated 2-15-99 and Master Drawing List No. 921132, Revision A, dated 2-15-99 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 891808, dated 9-14-98 is required for Mooney Model M20L for S-TEC System 20 or later FAA Approved revisions of the above supplement.

(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: 9-11-98 Date Reissued:

Inte of essuance : 9-14-98 Date Amended: 2-16-99, Revision 1 By Direction of the Administrator FEDERAL AVIATION (Signature) TOMNISTRATOR Michael Keirnan DAS Staff Coordinator, DAS 5 SW (Title)

47.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09393AC-D, Revision 1 Limitations and Conditions: (con't.)

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891809, dated 9-14-98 is required for Mooney Models M20M and M20R for S-TEC System 20 or later FAA Approved revisions of the above supplement.

3. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891810, dated 9-14-98 is required for Mooney Model M20L for S-TEC 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 891811, dated 9-14-98 is required for Mooney Models M20M and M20R for S-TEC System 30 or later FAA Approved revisions of the above supplement.

5. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891809, Revision 1, dated 2-16-99 is required for Mooney models M20M, M20R, and M20S 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 891811, Revision 1, dated 2-16-99 is required for Mooney models M20M, M20R, and M20S 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)

- February 16, 1999: Amended, Current. [certificate](https://openairdocs.org/files/sha256/d9/2c/d92cba69c43c4e22a023f903c7a88fde26798a2429bcb553c2e8b042fdbd84a6)

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