# STC SA09382AC-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 55/55X Two Axis Automatic Flight Guidance System, Model ST-839,
- Applied: July 23, 1998
- Status date: July 19, 2001
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A3](https://openairdocs.org/tcds/2A3)
- Certificate PDF: https://openairdocs.org/files/sha256/63/9b/639be0cc806975a4d307e69b7390c2ada54957d380ccd19684c6b5a15e37c592
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A304C2AC1B5F582685256CC1007F3ACD.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09382AC-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: SA09382AC-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 following froduct with the limitations and conditions therefor as specifed hereen meets the aircorthiness requiements of Part 3 of the bird sin Regulations and I as 23 of the Federal A viation Regulutions.

Original Product I ype Certificate Number: 2A3 Make: Moonev Model: M20L, M20M, M20R, and M20S Description of Type Design Change:

Installation of S-TEC System 55/55X Two Axis Automatic Flight Guidance System, Model ST-839, according to Bulletin No. 939, Revision 4, dated 7-19-01 and Master Drawing List No. 921110, Revision D, dated 7-19-01 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: 7-23-98 Date Reissued:

Date of Issuance: 8-14-98 Date Amended: 8-24-99, 7-19-01 By Direction of the Administrator FEDERAL AVIATION milK (Signature) TOMINSTRATIOR Michael Keirnan DAS Staff Coordinator, DAS 5 SW (Title)

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

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09382AC-D Limitations and Conditions: (con't.)

1. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891780, dated 8-14-98 is required for Mooney Model M20L 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 891785, dated 8-14-98 is required for Mooney Models M20M and M20R or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891785, Revision 1, dated 8-24-99 is required for Mooney models M20M, M20R, and M20S 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 891780, Revision 1, dated 7-19-01 is required for Mooney model M20L for S-TEC System 55/55X or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891785, Revision 2, dated 7-19-01 is required for Mooney models M20M, M20R, and M20S for S-TEC System 55/55X or later FAA Approved revisions of the above supplement.

6. 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)

- July 19, 2001: Amended, Current. [certificate](https://openairdocs.org/files/sha256/63/9b/639be0cc806975a4d307e69b7390c2ada54957d380ccd19684c6b5a15e37c592)

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