# STC SA3177SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell Automatic Flight System Model AK470 consisting of a
Century IIB Autopilot with Optional Radio Coupler.
- Applied: January 17, 1977
- Status date: June 18, 1984
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A4CE](https://openairdocs.org/tcds/A4CE)
- Certificate PDF: https://openairdocs.org/files/sha256/08/1c/081cf869720582ecb3de4d04b14e1634f26ad91e436ae9be22e9a700a4b87c9d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CB2A5F0449C2FB6885256CC2000A94D9.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3177SW-D

## ADs that name it (0)

None.

## Approved models (4)

- Textron Aviation Inc. TU206F ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. TU206G ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. U206F ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. U206G ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))

## 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: SA317754-D This certificate issued to: Century Flight Systems, Inc.

F.M. 1195 P. O. Box 610 Mineral Wells, TX 76067 Purt 3 of the CIVII AIr Regulations:

Original Product - Type berlificate Number. A4CE Make: Cessna Model: U206F, U206G, TU206F, TU206G Description of Type Design Change:

Installation of Mitchell Automatic Flight System Model AK470 consisting of a Century IIB Autopilot with Optional Radio Coupler according to Bulletin No.591, Revision 2, dated 3-27-78 and Master Drawing List No, 87A706, Revision B, dated 3-27-78 (14 Volt System) and/or later FAA Approved Revisions of the above data.

Limitations and Conditions: Eligible on Landplane, Floatplane & Amphibian Configurations The following FAA/DAS Approved Supplemental Flight Manuals are required:

/N 685907-1-S, dated 4-12-78 is required for Cessna Models U206F and Tuzubr, S/N U20603021 and Up and Cessna Models U206G and TU206G. P/N 68S688-S, dated 4-12-78 is required for Cessna Models U206F and TU206F, S/N U20601701 thru S/N U20603020 and/or later FAA Approved Revisions of the above Supplements.

This te bipeal and the suppeting tase wich is the basis fir appr val shull vernuin in effed unlit sur- compatibility of this modification with other previously approved modifications rendered, suspended, revoked, or a termination date is otheruise established by the Administrates f the Federal Aviation Administration .

Date of Application: . 1-17-77 Juk wisseed: 4-12-78; 6-18-84, Revision 2 Date of Issuance: 2-4-77 Date Amended:

FEDERAL AVIATION By Direction of the Administrator Don P. Watson (Signalure) TOMINISTRATO Manager, Aircraft Certification Division Southwest Region (Title) 47 FAA FoRM 8110-2 (10-68)

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

(Address of transferee) (Yumber and streel) from (Name of grantor) (Print or type) (Address of grantor) (ports per sequent) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):.

+.. = r. n. 1098-282-180

## Every issue (1)

- June 18, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/08/1c/081cf869720582ecb3de4d04b14e1634f26ad91e436ae9be22e9a700a4b87c9d)

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