# STC SA3039SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic yaw damper system Model YK445.
- Applied: January 6, 1975
- Status date: August 16, 1984
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A23CE](https://openairdocs.org/tcds/A23CE)
- Certificate PDF: https://openairdocs.org/files/sha256/14/c5/14c55652d307638ef7db81d3477fba44e9817b3c1d3848ca7eacc6e22aae3726
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/50D51DDB73BD83FD85256CC2000A9307.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3039SW-D

## ADs that name it (0)

None.

## Approved models (4)

- Beechcraft Corporation 58P ([TCDS A23CE](https://openairdocs.org/tcds/A23CE))
- Beechcraft Corporation 58PA ([TCDS A23CE](https://openairdocs.org/tcds/A23CE))
- Beechcraft Corporation 58TC ([TCDS A23CE](https://openairdocs.org/tcds/A23CE))
- Beechcraft Corporation 58TCA ([TCDS A23CE](https://openairdocs.org/tcds/A23CE))

## 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: SA303954-D This certificate issued to: Century Flight Systems, Inc.

F.M. 1195 P.O. Box 610 Mineral Wells, IX 76067 Part 23 of the Federal Aviation Regulations.

Original Product Typebertificate Number: A23CE Make: Beech Model: 58P, 58PA, 58TC, 58TCA Description of Type Design Change:

Installation of Mitchell Yaw Damper System Model YK445 according to Bulletin No.

S68, Revision 4, dated 5-18-78 and Master Drawing List No. 8/A/13, Revis1on D, dated 5-18-78 (28 Volt System) and/or later FAA Approved Revisions of the above Limitations and Conditions: FAA/DAS Approved Airplane Flight Manual Supplement, P/N 685216-2, dated 10-28-76 is required for Beech Models 58P, 58PA, 58TC and 58TCA or FAA/DAS Approved Pilot's Operating Handbook Supplement, P/N 68S711, dated 6-15-78 is required for Beech Models 58P, 58PA, 58TC and 58TCA and/or later FAA Approved Revisions of the above Supplements.

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

Date of Application: 1-6-75 Date Reissued: 8-27-75; 2-9-76; 10-28-76;

6-15-78; 8-16-84, Revision 5 Date of Issuance: . 1-17-75 Date Amended:

FEDERAL AVIATION Don P. Watson (Signature) THINISTRATD Manager, Aircraft Certification Division Southwest Region (Title)

47.

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

Signature of grantor (In ink) :

## Every issue (1)

- August 16, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/14/c5/14c55652d307638ef7db81d3477fba44e9817b3c1d3848ca7eacc6e22aae3726)

---
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.