# STC SA3228SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system model AK698 consisting of Century IIB autopilot with optional radio coupler.
- Applied: July 14, 1977
- Status date: December 7, 1983
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A17](https://openairdocs.org/tcds/3A17)
- Certificate PDF: https://openairdocs.org/files/sha256/26/e5/26e5ceff4e69dc837f7fabad786637ab1ac9e5dca8661e5b863bc66f70cdfae5
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6093528C9F88021E85256CC2000A958F.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3228SW-D

## ADs that name it (0)

None.

## Approved models (6)

- Cessna Aircraft Company 175 ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Cessna Aircraft Company 175A ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Cessna Aircraft Company 175B ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Cessna Aircraft Company 175C ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Cessna Aircraft Company P172D ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Cessna Aircraft Company R172K ([TCDS 3A17](https://openairdocs.org/tcds/3A17))

## 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 gtattt of arnica t^lfOM/a/ionA.

Bepartment of transportation federal 2toiation administration Supplemental t^pe Certificate iSlwrrbvew Century Flight Systems, Inc.

P.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 'fc^Jin&f^ .£wJa*ri*»c>iw*t/n4Afr/>*aMW 3 M^^nf Civil Air Cessna R172K, 175, 175A. 175B, 175C, P172D Installation of Mitchell Automatic Flight System Model AK698 consisting of a Century IIB Autopilot with Optional Radio Coupler according to Bulletin No. 827, Revision 1, dated 10/4/78 and Master Drawing List No. 87A938, Revision A, dated 10/4/78 and/or later FAA approved revision.

FAA/DAS Approved Supplemental Flight Manual P/N 68S570, dated 8/2/77 is required for Cessna Model R172K and P/N 688775 dated 11/1/78 is required for Cessna Models 175, 175A, 175B, 175C, and P172D and/or later FAA approved revision.

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

^fj^ ' v& 4& 7/14/77 8/2/77 • 11/1/78; 12/7/83 Revision 2 Don P. Watson (S>gnature) Manager, Aircraft Certification Division Southwest Region (Title)

FA>Fot»8110-2(10-68)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee)_ (Address of transferee). (XumlMT md ttrtet) from (Name of grantor) (Print or type).

(Address of grantor) (Xumktt *nJ ttrttlj Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

. I. < r. a ft i«n«-««»-«»°

## Every issue (1)

- December 7, 1983: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/26/e5/26e5ceff4e69dc837f7fabad786637ab1ac9e5dca8661e5b863bc66f70cdfae5)

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