# STC SA7782SW-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-412.
- Applied: November 7, 1990
- Status date: December 13, 1990
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A25](https://openairdocs.org/tcds/3A25)
- Certificate PDF: https://openairdocs.org/files/sha256/23/0b/230b31e525e425af1097658bea7d733f81ea4eef8b47541e7a90d81cea372ac8
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FBE50B80FA92400185256CC20056A48A.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA7782SW-D

## ADs that name it (0)

None.

## Approved models (5)

- The Cessna Aircraft Company 320B ([TCDS 3A25](https://openairdocs.org/tcds/3A25))
- The Cessna Aircraft Company 320C ([TCDS 3A25](https://openairdocs.org/tcds/3A25))
- The Cessna Aircraft Company 320D ([TCDS 3A25](https://openairdocs.org/tcds/3A25))
- The Cessna Aircraft Company 320E ([TCDS 3A25](https://openairdocs.org/tcds/3A25))
- The Cessna Aircraft Company 320F ([TCDS 3A25](https://openairdocs.org/tcds/3A25))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

Arita S0ts a 21 ma Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA77825W-D This certificate issued to: S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, TX 76067 solifes that the shange in the lyps design for the following product with the limitations and conditions shovefor as specified heron meds the sirworthiness requiremonts of Port 3 of the CIVIl Air Regulations.

Original Product - Type Contifical Numbon: 3A25 Model: 320В, 320С, 320D, 320Е, AND 320F Description of Type Design Change:

Installation of S-TEC System 65 Two Axis Automatic Flight Guidance System, Model ST-412, according to Bulletin No. 512, Revision 4, dated 11-06-90 and Master Drawing List No. 92442, Revision D, dated 11-06-90 and/or later FAA Approved revisions of the above data (28 Volt System).

1. FAA Approved Supplemental Flight Manual, P/N 89899, dated 12-13-90 is required for Cessna Models 320B, 320C, 320D, 320E, and 320F and/or later FAA Approved revisions of the above supplement.

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

Thomas (Tille)

17.

**PAN 7088 8110-2 (10-68)**

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number - to (Name of transferee) (Address of transferee) (Number and streel) (City, State, and ZIP code) from (Name of grantor) (Print or type) (Address of grantor) ( Numher and streel) (Cits. State, and IP code!

Signature of grantor (In ink):

## Every issue (1)

- December 13, 1990: Issued, Current. [certificate](https://openairdocs.org/files/sha256/23/0b/230b31e525e425af1097658bea7d733f81ea4eef8b47541e7a90d81cea372ac8)

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