# STC SA1667SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc
- Description: Installation of Mitchell automatic flight system Model YK385 consisting of yaw damper.
- Status date: July 16, 1984
- Data sheets: A7CE
- Certificate PDF: https://openairdocs.org/files/sha256/a9/bc/a9bc9118b5e66e4e068cfc9a3c1a29159b9c4c3f014327514726bcebd680dba4
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8B14C25FEEF30D5085256CC10083CE88.0001
- Page: https://openairdocs.org/stc/SA1667SW

## ADs that name it

None.

## Approved models (1)

- Cessna Aircraft Company 421B (TCDS A7CE)

## 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.

Bepartment of Cruaspornmon federal aoiation administration Supplemental t^pe Certificate SA1667SW

•-Sle&t44a&<tnd>.

Century Flight Systems, Inc.

P.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 A/Ct, Cessna —£l«A&*iJt&0n' *if<-''uJLe'^A'4AAan ~viAttnaf •' Air Installation of Mitchell Automatic Flight System Model YK385 consisting of Yaw Damper according to Bulletin No. 507 dated 4-27-73 and Master Drawing List 87A662 dated 4-27-73.

This modification is for Cessna Model 421B, Serial No. 421B-0301 and up.

FAA Approved Airplane Flight Manual Supplement dated May 30, 1973, is required.

JS?a£ibSii8$eShij ?g2iijSta?2Jfth Othe* P^lously approved modifications i^tnjA'4&F&f££a&<jL<tta 4nf *d*^yft&rit&rt<a'4tafa **>ftAC/t< td~ &&£• f-aJf^ ^fr jt/tjkf*''t*zf drta&/fw/w*/"«- tstt/sa&rrf A&w&f'-AMt** ',.f</M*t-r & April 30, 1973 May 30, 1973 ?/->& U' 7-16-84, Revision 1 e Don P. Watson Manager, Aircraft Certification Division Southwest Region (Title) ___

T/iu ctJliJtcalr may be transfrrnd in accordance unt/i f-AR 21.17 f*A fotf Bl IO-J(lO-»6)

INSTRUCTIONS; The transfer endorsement below may be used to notify the appropriate FAA Regional Office of the transfer of ihis Supplemental Type Certificate The FAA will reissue 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) (Numbtt and i (Ctly, Stale, sad Z.IP iadf> from (Name of grantor) (Print or type) (Address of grantor) (SJumbrr and ilrtetj I City, SlaU, and £IP ivdej Extent of Authority (if licensing agreement):

Dale of Transfer:

Signature ol grantor (In ink):

C fr'AA AC 6'J-S536

## Every issue (1)

- July 16, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/a9/bc/a9bc9118b5e66e4e068cfc9a3c1a29159b9c4c3f014327514726bcebd680dba4)

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From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.