# STC SA09220AC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 30 ALT Altitude Hold System, Model ST-677.
- Applied: May 16, 1997
- Status date: May 21, 1997
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A3](https://openairdocs.org/tcds/2A3)
- Certificate PDF: https://openairdocs.org/files/sha256/a6/75/a675a069bd37351316c4428a7ef4efa701ca151bb5ad007501f51d6ed5a97e13
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5DED0DA279F1972B85256CC1007F3A22.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09220AC-D

## ADs that name it (0)

None.

## Approved models (3)

- Mooney International Corporation M20F ([TCDS 2A3](https://openairdocs.org/tcds/2A3))
- Mooney International Corporation M20G ([TCDS 2A3](https://openairdocs.org/tcds/2A3))
- Mooney International Corporation M20J ([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: SA09220 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 following product with the limitations and conditions therefor as specifed hereon meets the aivorthiness requiements of Part I of the bind In Regulations.

Original Product I ype Certificale Number: 2A3 Make: Mooney Model: M20F, M20G, and M20J Description of 9 ype Design Change:

Installation of S-TEC System 30 ALT Altitude Hold System, Model ST-677, according to Bulletin No. 717, dated 5-14-97 and Master Drawing List No. 92993, dated 5-14-97 or later FAA Approved revisions of the above data (14 Volt System).

FAA/DAS Approved Supplemental Flight Manual, P/N 891384, dated 5-21-97 is required for Mooney Models M20F and M20G or later FAA Approved revisions of the above supplement.

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

Date of Application: 5-16-97 Date ronsued:

Date of Issuance: 5-21-97 Date Amended:

By Direction of the Administrator FEDERAL AVIATION Wein Thomas TOMINISTRATO 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: SA09220 AC-D Limitations and Conditions: (con't.)

2. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891385, dated 5-21-97 is required for Mooney Model M20J or later FAA Approved revisions of the above supplement.

3. 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

The FAA will reissue the certificate in the name of the transferee and forward it to him

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and stre (City, State, and ZIP code) from (Name of grantor) (Print or type] (Address of grantor) Number:

(City, State› and ZIP codel Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- May 21, 1997: Issued, Current. [certificate](https://openairdocs.org/files/sha256/a6/75/a675a069bd37351316c4428a7ef4efa701ca151bb5ad007501f51d6ed5a97e13)

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