# STC SA7777SW-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-329, with optional automatic electric trim.
- Applied: August 9, 1990
- Status date: August 17, 1990
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A10](https://openairdocs.org/tcds/3A10)
- Certificate PDF: https://openairdocs.org/files/sha256/87/36/87363b58b95c66939af17950f302fc16c8544a127e0756e2ecedeb4ce9a02fd6
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/84C696E007EA8E7885256CC20056A47E.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA7777SW-D

## ADs that name it (0)

None.

## Approved models (1)

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

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

^Department of transportation—federal Station administration Supplemental t:gpc Certificate SA7777SW-D S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, Texas 76067 ——— rrtrrft tfr mirtrrritft' -*~f— 3A10

• CESSNA Civil Air Installation of S-TEC System 60 two Axis Automatic Flight Guidance System, Model ST-329, with Optional Automatic Electric Trim according to Bulletin No. 429, dated 8-08-90 and Master Drawing List No. 92521, dated 8-08-90 with Optional Flight Director/Steering Horizon and/or later FAA Approved revisions of the above data (28 Volt System).

1. FAA/DAS Approved Supplemental Flight Manual, P/N 89894, dated 8-17-90 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.

fi&c*****: 8-09-90 8-17-90 (Sifnaturt} Harold W. Holdeman<;t.aff HnnrHiatnr (TiHt)

nil ttrlifualt may tt transfrrrtJ in tcnrJana loiM FAR 21.17.

fAAFOM I110-2 (!»-«•)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street j (City, State, and <7P code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) ( ('.lit. Slale. and ^IP <ode I Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- August 17, 1990: Issued, Current. [certificate](https://openairdocs.org/files/sha256/87/36/87363b58b95c66939af17950f302fc16c8544a127e0756e2ecedeb4ce9a02fd6)

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