# STC SA3112SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell Automatic Flight System Model AK566
- Applied: February 10, 1976
- Status date: May 24, 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/b3/a4/b3a471f5545116d40036b045a96d0ca959f01c916b2fb814a4fdb81baa3add2a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AC07D95DDB4FD42485256CC2000A93F8.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3112SW-D

## ADs that name it (0)

None.

## Approved models (6)

- Cessna Aircraft Company 210L ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210M ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210N ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210L ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210M ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210N ([TCDS 3A21](https://openairdocs.org/tcds/3A21))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA31125W-D This certificate issued to: Century Flight Systems, Inc.

F.M. 1195 P. O. Box 610 Mineral Wells, IX 76067 Certifies that the change in the type design for the following product with the limitations and conditions therefon as specifed hereon meels the airworshiness seguirements of Pearl 3 of the CIV11 AIT Regulations:

Original Product - Type Certificate Numben: 3A21 Make: Cessna Make: 210L, I210L, 210M, T210M, 210N, IZION Description of Type Design Change:

Installation of Mitchell Automatic Flight System Model AK566 consiting of a Century III Autopilot with Optional Radio Coupler and Glide Slope Coupler according to Bulletin No. 689, Revision 9, dated 3-8-79 and Master Drawing List No. 87A819, Revision J, dated 3-8-79 (28 Volt System) and/or later FAA Approved Revisions of the above data.

Limitations and Conditions: FAA/DAS Approved Supplemental F1ight Manua1, P/N 685351-2 dated 2-4-77 is required for Cessna Models 210L and I210L, S/N 21059503 thru S/N 21061039. FAA/DAS Approved P1lot's Operating Handbook Supplement, P/N 68S510, dated 2-4-77 is required for Cessna Models 210L and T210L, S/N 21061040 thru S/N 21061573 and Cessna Models 210M and T210M. Pilot's Operating Handbook and FAA/DAS Approved Airplane Flight Manual Supplement, P/N 685843, dated 3-26-79 is required SEE PAGE 2, CONTINUATION SHEET, A PART OF THIS STC.

Compatibility of this modification with other previously approved modifications

Date of Application: 2-10-76 Jule missused: 5-24-76; 2-4-77; 3-26-79;

5-24-84, Revision 4 Date of Issuance: . Jate unended:

FEDERAL AVIATIO By Direction of the Administrator Don P. Watson (Signature ) OMINISTR Manager, Aircraft Certification Division Southwest Region (Title) 47 FAA FoRM B110-2 (10-68)

Sanitro States of Salmerica Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA31125W-D, dated 5-24-84, Revision 4 Limitations and Conditions: (continued) for Cessna Models 210N and T210N and/or later FAA Approved Revisions of the above Supplements.

Placard, P/N 13A660-2 is required for owners with Supplemental Flight Manuals.

Placard, P/N 13A660-1 is required for owners with Pilot's Operating Handbooks.

**FAA FORM 8110-2-1 (10-69) PAGE 2 OF 2 PAGES**

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

(Address of transferee) (Yumber and streel) (City, Stake, and 21P code ) from (Name of grantor) (Print or type) — (Address of grantor) (Number and sireel;

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

Signature of grantor (In ink): - .0.00.1 a3.n8n

## Every issue (1)

- May 24, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/b3/a4/b3a471f5545116d40036b045a96d0ca959f01c916b2fb814a4fdb81baa3add2a)

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