# STC SA7129SW-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-391.
- Applied: December 3, 1986
- Status date: December 17, 1986
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A15](https://openairdocs.org/tcds/3A15)
- Certificate PDF: https://openairdocs.org/files/sha256/24/36/2436e42f17e3754009ab37db83711a1ed2da14e7968662b948afc1c8f30a490a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EA2A1311BD575C0485256CC20056A192.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA7129SW-D

## ADs that name it (0)

None.

## Approved models (6)

- Raytheon Aircraft Company H35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Raytheon Aircraft Company J35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Raytheon Aircraft Company K35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Raytheon Aircraft Company M35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Raytheon Aircraft Company N35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Raytheon Aircraft Company P35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))

## 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.

United States of antnca department of transportation—federal aoiarion administration Supplemental 'Cgpe Certificate ^su^mve^ SA7129SW-D S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, TX 76067 Air CSptaj'na/ i-wecu&c/ —— J/4^4<r ~&*r£f<itM£e«yYumo&r- : 3A1 5 BEECH H35, J35, K35, M35, N35 AND P35 : jx CsyA* —£ je&u&n • ~\3suzn*ze :

Installation of S-TEC System 65 Two Axis Automatic Flight Guidance System, Model ST-391, according to Bulletin No. 491, dated 11-03-86 and Master Drawing List No.

92406, dated 11-03-86 and/or later FAA Approved revisions of the above data (14Volt System).

1. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89717, dated 12-17-86 is required and/or later Approved revisions of the above supplement.

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

^ / /• / /f 12-03-86 12-17-86 (Signature) Harold W. Holdeman DAS Staff Coordinator, DAS 5 SW (TitU)

TAu crrttfualt mty A* treiuftmJ in tcotrtuut with FAR 21.47.

**FAA NMM II10-J (1O-M)**

INSTRUCTIONS : The transfer endorsement below may be used to notify the appropriate FAA Regional Office of the transfer of this Supplemental Type Certificate.

The FAA will reissue the certificate In the name of the transferre and forward it to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to Ctfame of transferee) (Address of transferee.) __ (y^um6er atuf street) (City, State, atufZlf code) from (9{ame of grantor) (Trint or type) _ (Address of grantor) (fjutr&er and street) (City, State, mufZlf cofa) Exent of Authority (if licensing agreement) :

Signature of grantor (In Page 2 of 2

## Every issue (1)

- December 17, 1986: Issued, Current. [certificate](https://openairdocs.org/files/sha256/24/36/2436e42f17e3754009ab37db83711a1ed2da14e7968662b948afc1c8f30a490a)

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