# STC SA3401SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system Model AK906 consisting of a Century 31autopilot.
- Applied: May 3, 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/sha256/29/9c/299c03ba0fc53717130d819ac13d84f7eca5f426da16ce198491f4b951bb1475
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E67BEB9D36C5A05F85256CC2000A97B0.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3401SW-D

## ADs that name it (0)

None.

## Approved models (4)

- Beechcraft Corporation S35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation V35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation V35A ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation V35B ([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.

Bitted $tatu of aratrita department of'Transportation federal atriation administration Supplemental 'Cgpe Certificate SA3401SW-D Century Flight Systems, Inc.

F.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 v>4fo'0y^i&J&eA4CfM'fi^^iric'fc>tt0t(r4n&Ji9<t>c&uc6Msi4fo 3 ^J&& Civil Air <-/l4a(6ta&onA.

: 3A15

- Beech : S35, V35, V35A, V35B Installation of Mitchell Automatic Flight System Model AK906 consisting of a Century 31 Autopilot per Bulletin No. 1037, dated 3-31-82 and Master Drawing List No. 87A1111, dated 3-31-82 (14 Volt System) and/or alter FAA approved revision.

JJ FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 68S938, dated 4-23-82 and/or later FAA approved revision.

Placard 13A990-1 stating "Conduct trim check prior to first flight of day (see POH)" is required.

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

8-15-83 - Revision 1 Don P. Watson (Signature) Manager, Aircraft Certification Division Southwest Region (Title) ( I me)

FAA font 81 10-2 M O-A8IFAA FOUM 8110-2 (10-68)

INSTRUCTIONS: The transfer endowment below may be used to notify the appropriate FAA Regional Office of i he transfer of thii 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 transferee). (.Vumbrr ml Ore*) from (Name of grantor) (Print or type).

(Address of grantor) __ (Cit>: Stall, (Gt?, Suu.

Signature of grantor (In ink):

## Every issue (1)

- August 15, 1983: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/29/9c/299c03ba0fc53717130d819ac13d84f7eca5f426da16ce198491f4b951bb1475)

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