# STC SA3311SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system model AK453 consisting of Century III autopilot with optional radio coupler and glide slope coupler
- Applied: January 16, 1979
- Status date: March 28, 1984
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A23CE](https://openairdocs.org/tcds/A23CE)
- Certificate PDF: https://openairdocs.org/files/sha256/c7/84/c784a4e87d6c71162a1485c3a044051f7b85faf89c8c25cb347662ac4357d80c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/34B79B24B541271185256CC2000A96B6.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3311SW-D

## ADs that name it (0)

None.

## Approved models (4)

- Beechcraft Corporation 58P ([TCDS A23CE](https://openairdocs.org/tcds/A23CE))
- Beechcraft Corporation 58PA ([TCDS A23CE](https://openairdocs.org/tcds/A23CE))
- Beechcraft Corporation 58TC ([TCDS A23CE](https://openairdocs.org/tcds/A23CE))
- Beechcraft Corporation 58TCA ([TCDS A23CE](https://openairdocs.org/tcds/A23CE))

## 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: SA331154-D This certificate issued to: Century Flight Systems, Inc.

F.M. 1195 P. O. Box 610 Mineral Wells, IX 76067 Purt 3 of the CIV11 Alr Regulations.

Original Product - Type bertificate Number: A23CB Make: Beech Model: 58P, 58PА, 58TC, 58TCA Description of Type Design Change:

Installation of Mitchell Automatic Flight System Model AK453 consisting of a Century III Autopilot with Optional Radio Coupler and Glide Slope Coupler according to Bulletin No. 576-1 dated 1-15-79 and Master Drawing List No. 87A1047 dated 1-15-79 (28 Volt System) and/or later FAA approved revision.

FAA/DAS Approved Airplane Flight Manual Supplement P/N 68S819 dated 2-22-79 18 required;

or FAA/DAS Approved P1lot's Operating Handbook Supplement P/N 685820 dated 2-22-79 18 required as applicable.

Placard P/N 13A600 1s required for owners with Airplane Flight Manuals.

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

rendered, suspended, revoked, or a termination date is otherwise established by the Administrater of the Federal Aviation Administration .

Date of Application: 1-16-79 Jute missued: 3-28-84 Rev181on 1 Date of Issuance: 2-22-79 Sale unended:

FEDERAL AVIATION y ding on are Staminis tral

2. massa Don P. Watson (Signature ) * AINISTRATO 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) (1391p5 preo saquir)") from (Name of grantor) (Print or type) (Address of grantor) (Number and streel ;

Date of Transier:

Signature of grantor (In ink):

+ 11< r. 0n: 1898-283.080

## Every issue (1)

- March 28, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/c7/84/c784a4e87d6c71162a1485c3a044051f7b85faf89c8c25cb347662ac4357d80c)

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