# STC SA3404SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Edo Avionics automatic flight system, Model AK910 consisting of a Century 31 autopilot.
- Applied: May 14, 1982
- Status date: August 15, 1983
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A15](https://openairdocs.org/tcds/3A15)
- Certificate PDF: https://openairdocs.org/files/sha256/e7/73/e7730bdc3eb60916792ab8655506bee1df534d6f8278d8f94cf88bd57e8d2d00
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0B998FFC91125ABF85256CC2000A97B8.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3404SW-D

## ADs that name it (0)

None.

## Approved models (1)

- Beechcraft Corporation F33A ([TCDS 3A15](https://openairdocs.org/tcds/3A15))

## 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 grates of amenta Bepartment of Importation —.federal aoiation administration Supplemental 'Cupc Certificate iSbwmvew SA3404SW-D Century Flight Systems, Inc.

P.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 'fe^^^^^^ ap^^ 3 Civil Air 3A15 Beech F33A Installation of Edo Avinnics Automatic Flight System, Model AK910 consisting of a Century 31 Autopilot per Bulletin No. 1041, dated 4-23-82 and Master Drawing List No. 87A1116, dated 4-23-28 (28 Volt System) and/or later FAA approved revision.

Pilot's Operating Handbook and FAA Approved Airplane Flight Manual Supplement, B/N 68S944, dated 5-18-82 and or later FAA approved revision.

Placard P/N 13A990-1 is required.

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

-U' 5-14-82 S— 1 ^«— ft 2' 8-15-83 Revision 1 _ && • 41 ttts ttftfft •' Don P. Watson (Slgna<u,<) Manager, Aircraft Certification Division Southwest Region (TitU)

This cerlificatf may be transferred in accordance with FAR 21.47.

**FAAFOIM 8110-2(10-68)**

he appropriate FAA Regional Office of the transfer of this 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 Iransferee).

from (Name of grantor) (Print or type).

(Address of grantor) __ I Cit,-. Stale.««/ 3 (Citf, Sun, Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- August 15, 1983: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e7/73/e7730bdc3eb60916792ab8655506bee1df534d6f8278d8f94cf88bd57e8d2d00)

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