# STC SA3157SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell Automatic Flight System Model AK6 29 consisting of Century IIB
Autopilot with Optional Radio Coupler
- Applied: August 17, 1976
- Status date: June 6, 1984
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 3A21](https://openairdocs.org/tcds/3A21)
- Certificate PDF: https://openairdocs.org/files/sha256/cc/13/cc1398551ba1614a212ae6aa9f7059b4e791972e7e45175076d4d97ed9b54536
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4CCF81D9A92860C185256CC2000A9497.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3157SW-D

## ADs that name it (0)

None.

## Approved models (2)

- Textron Aviation Inc. 210 ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210A ([TCDS 3A21](https://openairdocs.org/tcds/3A21))

## 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.

^Department of transportation —Jpederal 2toiation administration Supplemental t^pe Certificate <yKu<m0ev'SA3157SW-D Century Flight Systems, Inc.

P.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 <^^ 3 jJn-f Civil Air 3A21 Cessna 210, 210A n£L£ :

Installation of Mitchell Automatic Flight System Model AK6 29 consisting of Century IIB Autopilot with Optional Radio Coupler according to Bulletin No. 756, dated 8-16-76 and Master Drawing List No. 87A878, dated 8-16-76.

FAA/DAS Approved Supplemental Flight Manual, P/N 68S403, dated -9-7-76 is required.

approved_ modifications £/M 4"crf^ 6-6-84, Revision 1 _ / a/e 41 /tts ttr/fff ^ i-*6cf*<"!i ii/ Iflf f'fatsn':ntA6ra/f- "/ •'• •• • * Don P. Watson Manager, Aircraft Certification Division Southwest Region

fAA FO«M 8II0-2 (10-66)

.NSTRUCTIONS: The transfer endorsement be.ow m.y be used to notify the appropriate FAA Regional Office of t he transfer of this Supplemental Type Cenificate.

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

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee).

(Address of transferee) __ from (Name of grantor) (Print or type).

(Address of grantor) tffumktr *n4 itrtil/ (Cify, SUU.

Signature of grantor (In ink):

## Every issue (1)

- June 6, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/cc/13/cc1398551ba1614a212ae6aa9f7059b4e791972e7e45175076d4d97ed9b54536)

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