# STC SA3492SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of a Century yaw damper system, kit no. YK999 consisting of a Century yaw damper.
- Applied: September 8, 1992
- Status date: September 9, 1992
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A7CE](https://openairdocs.org/tcds/A7CE)
- Certificate PDF: https://openairdocs.org/files/sha256/7a/f3/7af3dceac9e1db5f3028d955d1186dbcc77582fbf20062314692ed11d018b854
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/55C679107039231586257DC4005CEBC0.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3492SW-D

## ADs that name it (0)

None.

## Approved models (3)

- Cessna Aircraft Company 414 ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))
- Cessna Aircraft Company 414A ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))
- Cessna Aircraft Company 421C ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))

## 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: SA319254-D This certificate issued to: Century Flight Systems, Inc.

F.M. 1195 P.O. Box 610 Mineral Wells, Texas 76068 Part 3 of the Civi 1 Aeronautics Regulations:

Original Product - Type Certificate Number: ATCE Make: CESSNA Model: 411, 114A, 421C Description of Type Design Change:

Installation of a Century Yaw Damper System, Kit No. YK999 consisting of a Century Yaw Damper per Bulletin No.2057, dated 07-31-92, and Master Drawing List 87A1255, dated 07-31-92 System) and/or later FAA/DAS approved revision.

see Continuation Sheet, page 2 of this SIC

9-8-92 Date of Issuance: 9-9-92 Date Amended:

EDERAL AVIATION Pay divection of the Admin Michel M Curley TOMINISTRANO N Michele M. Owsley Manager Airplane Certification Office ASW-150 (Title)

47.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number SA3492SW-D Limitations and Conditions: (continued):

FAA/DAS approved Supplement to Pilot's Operating Handbook and/or Airplane Flight Manual Supplement P/N 6851059, dated 8-25-92 is required for Cessna Models 414, 414A.

Also eligible on Cessna Model 414A when modified by SIC SA8125SW, STC SA4943SW, and SIC SA4546SW.

FAA/DAS approved Supplement to Pilot's Operating Handbook and/or Airplane Flight Manual Supplement P/N 68S1060, dated 8-25-92 is required for Cessna Model 421C.

Also eligible on Cessna Model 421C when modified by STC SA5811SW.

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

**FAA FORM 8110-2-1 (10-69)**

**PAGE OF PAGES FAA AC 72-4435**

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number .

to (Name of transferee) - (Address of transferee) (230175 preo sequins') from (Name of grantor) (Print or type) (Address of grantor) (Number and sireel;

(City, Stale, and ZIP rode) Extent of Authority (if licensing agreement):

Signature of grantor (In ink): - +11 = r. 0~. 1080-862-190

## Every issue (1)

- September 9, 1992: Issued, Current. [certificate](https://openairdocs.org/files/sha256/7a/f3/7af3dceac9e1db5f3028d955d1186dbcc77582fbf20062314692ed11d018b854)

---
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.