# STC SA7176SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 65 two axis automatic flight guidance system, Model ST-435.
- Applied: May 17, 1988
- Status date: June 27, 1988
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A3](https://openairdocs.org/tcds/2A3)
- Certificate PDF: https://openairdocs.org/files/sha256/3c/f2/3cf288658b544ef0e1253fd1c6b0a2f2efd07247ccb1ba0b31f909863ab55f31
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3047D31183A1E1C185256CC20056A1D7.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA7176SW-D

## ADs that name it (0)

None.

## Approved models (1)

- Mooney Aircraft Corporation M20L ([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 SA7176SW-D This certificate issued to: S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, Texas /606/ Part 3 of the CiVIl Air Regulations.

Original Product - Type bertificate Numben: 2A3 Make: Mooney Model: M2OL Description of Type Design Change:

Installation of S-TEC System 65 Two Axis Automatic Flight Guidance System, Model ST-435, according to Bulletin No. 535, dated 5-13-88 and Master Drawing List No.

92472, dated 5-13-88 and/or later FAA Approved revisions of the above data (28 Volt System).

1. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89782, dated 6-27-88 is required and/or later FAA Approved revisions of the above supplement.

2. Compatability of this modification with other previously approved modifications must be determined by the installer.

Date of Application: 5-17-88 Date Reissued:

Date of Issuance: . 6-27-88 Date Amended:

EDERAL AVIATION By Direction of the Administrator Failed I Hillema (Signalure) TMINISTRATO Harold W. Holdeman DAS Staff Coordinator, DAS 5 SW (Title)

47.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and Z1P code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and ZIP code) Exent of Authority (if licensing agreement) :

Signature of grantor (In ink) : ....

Page of ?

## Every issue (1)

- June 27, 1988: Issued, Current. [certificate](https://openairdocs.org/files/sha256/3c/f2/3cf288658b544ef0e1253fd1c6b0a2f2efd07247ccb1ba0b31f909863ab55f31)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.