# STC SA7194SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 60 Two Axis Automatic Flight Guidance System, Model ST-323 with Optional Automatic Electric Trim.
- Applied: March 15, 1989
- Status date: April 14, 1989
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A10](https://openairdocs.org/tcds/3A10)
- Certificate PDF: https://openairdocs.org/files/sha256/3a/33/3a3312bf5c47c992897c6430387abe5fece455f4d472cad61896b6814a26a164
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BCF6E1E3DDFB995A85256CC20056A1F3.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA7194SW-D

## ADs that name it (0)

None.

## Approved models (3)

- The Cessna Aircraft Company 310 ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- The Cessna Aircraft Company 310A (USAF U-3A) ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- The Cessna Aircraft Company 310B ([TCDS 3A10](https://openairdocs.org/tcds/3A10))

## 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: SA71945W-D This certificate issued to: S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, Texas 76067 Part 3 of the CiVil Air Regulations.

Original Product -TypeGertificate Number: 3A10 Make: Cessna Model: 310, 310A and 310B Description of Type Design Change:

Installation of S-TEC System 60 Two Axis Automatic Flight Guidance System, Model ST-323, with Optional Automatic Electric Trim according to Bulletin No. 423, dated 3-10-89 and Master Drawing List No. 92490, dated 3-10-89 with Optional

- light Director/Steering Horizon System and/or later FAA Approved revisions of the above data (28 Volt System).

1. FAA Approved Supplemental Flight Manual, P/N 89819, dated 4-14-89 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.

4-14-89 Date Amended:

FEDERAL AVIATION By Direction of the Administrator Zerold It Wildema (Signature ) PHINISTRATO Harold w. Holdeman DAS Staff Coordinator, DAS 5 SW (Title)

47.

**FAA FOR 8110-2 (10-68)**

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 and street) (City, State, and ZIP code) Exent of Authority (if licensing agreement) :

Signature of grantor (In ink) :

## Every issue (1)

- April 14, 1989: Issued, Current. [certificate](https://openairdocs.org/files/sha256/3a/33/3a3312bf5c47c992897c6430387abe5fece455f4d472cad61896b6814a26a164)

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