# STC SA7800SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC yaw damper system Model ST-424
- Applied: June 5, 1991
- Status date: July 10, 1991
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A12CE](https://openairdocs.org/tcds/A12CE)
- Certificate PDF: https://openairdocs.org/files/sha256/da/45/da45ab9c5b4761d190ee5b099b5feba5910a14ddc0f498e68af50ba3d0eb61e9
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1A864F5534B2586785256CC20056A4AB.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA7800SW-D

## ADs that name it (0)

None.

## Approved models (3)

- Raytheon Aircraft Company 60 ([TCDS A12CE](https://openairdocs.org/tcds/A12CE))
- Raytheon Aircraft Company A60 ([TCDS A12CE](https://openairdocs.org/tcds/A12CE))
- Raytheon Aircraft Company B60 ([TCDS A12CE](https://openairdocs.org/tcds/A12CE))

## What the certificate says

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

Bait Sates of Sacia Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number 5A780054-0 This certificate issued to: S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex lineral Wells, lexas /606.

Port 23 of the Federal Aviation Regulations Original Product -Typo bonificate Number: A12CE Make: BEECH Model: 60, A60, AND B60 Description of Type Design Change:

Installation of S-TEC Yaw Damper System, Model ST-424, according to Bulletin No. 524, dated 6-03-91 and Master Drawing List No. 92544, dated 6-03-91 and/or later FAA Approved revisions of the above data (28 Volt System).

1. FAA/DAS Approved Airplane Flight Manual Supplement, P/N 89931, dated 7-10-91 is required for Beech Models 60, A60, and B60 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.

7-10-91 Dato amcoded:

FEDERAL AVIATION By Direction of the Administrator Wienea (Signature) TAMIN STRATOR William J. . Thomas DAS Staff Coordinator. DAS 5 SW (Title)

**PAN FOR 8110-2 (10-681**

The FAA will reissuc the certificate in the name of the transferee and forward it to him.

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) ( Nunher and streel) (City. Stale, and ZIP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- July 10, 1991: Issued, Current. [certificate](https://openairdocs.org/files/sha256/da/45/da45ab9c5b4761d190ee5b099b5feba5910a14ddc0f498e68af50ba3d0eb61e9)

---
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.