# STC SA3266SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system model AK725 consisting of Century III autopilot with optional radio coupler and glide slope coupler
- Applied: January 24, 1978
- Status date: March 28, 1984
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A20](https://openairdocs.org/tcds/3A20)
- Certificate PDF: https://openairdocs.org/files/sha256/27/af/27af78fe7e743041322b8f3d6c4ee351978b07a8d9fe6d14fad99671bff47880
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C11939458849BEFC86257DA8006F527D.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3266SW-D

## ADs that name it (0)

None.

## Approved models (4)

- Beechcraft Corporation 65-90 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation 65-A90 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation B90 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation C90 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))

## 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.

Bepartment of/Cransportation—federal aoiation administration Supplemental HTupc Certificate *siu#rvvevL' SA3266SW-D ^fteattut/to Century Flight Systems, Inc.

F.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 J^fy/wdeAj^w^wJ^ Civil Air 3A20 Beech

65-90. 65-A90, B90, C90 Installation of Mitchell Automatic Flight System Model AK725 consisting of Century III Autopilot with Optional Radio Coupler and Glide Slope Coupler according to Bulletin No. 859 dated 1-24-78 and Master Drawing List No, 87A982 dated 1-24-78 (28 Volt System), or later FAA approved revision.

Also eligible on Models 65-90 and 65-A90 when moflif ied in accordance with Notes 7. 11, 17, 18, or 19 of TCDS No. 3A20,Rev. 31 dated 4-15-76.

The following Airplane "Flight Manual Supplements are required as applicable:

P/N 68S634 dated 2-24-78 for 65-90 and 65-A90; P/N 68S637 dated 2-24-78 for Models B90 and C90, S/N LJ-667 and below.

**SEE CONTINUATION SHEET. PAGE 2, A PATT OF THIS STC.**

1-24-78 *— *H fO °ther P^ iously approved modifications ,,,,/ 5-15-78; 3-28-84 Revision 2 Don P. WatSOn (Signature) Manager, Aircraft Certification Division Southwest Region (Title)

This certificate may be transferred in accordance with PAR 21.17.

fAAFo«M 8110-2(10-68)

ttnittd gtotts of aratrita Bepartment of transportation— ^federal atrtation administration Supplemental 'Cuje Certificate(Continuation &heet) SA3266SW-D RavUlcn 2 Limitations and Conditions (Cont'd):

Pilot's Operating Handbook and FAA/DAS Approved Airplane Flight Manual Supplement, P/N 68S638, dated 2-24-78 is required for Beech Model C90, S/N LJ-668 and After Except S/N LJ-670 and/or later FAA Approved revisions of the above supplements.

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

•"' 4 Placard, P/N 13A660 is required for owners with an Airplane Flight Manual

*A FORM 8110-2-1 (10-69) PAGE 20p2 PAGES FAA AC 72-4435

INSTRUCTIONS: The .ntnrfer endowment below may be u~d to notify the appropriate FAA Regional Office of the transfer of thU Supplemental Type Certificate.

The FAA will reitsue the certificate in the name of the traniferce and forward it to him.

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

(Address of transferee). I Xumttr tnd Ore* ) (City. Stale. **i 3 from (Nome of grantor) (Print or type).

(Address of grantor) Extent of Authority (if licensing agreement): _ Date of Transfer:.

Signature of grantor (In ink):

## Every issue (1)

- March 28, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/27/af/27af78fe7e743041322b8f3d6c4ee351978b07a8d9fe6d14fad99671bff47880)

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