# STC SA3043SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system model AK525 consisting of a Century IV autopilot or model AK525FD consisting of a Century IV flight director autopilot with optional remote annuciator.
- Applied: February 4, 1975
- Status date: June 22, 1984
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A25](https://openairdocs.org/tcds/3A25)
- Certificate PDF: https://openairdocs.org/files/sha256/2d/47/2d47965ec06c58f4a76664423a04abeb973a883dc2de9ee37a7a61aef2175dd2
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FE89439CDB04A83E85256CC2000A9318.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3043SW-D

## ADs that name it (0)

None.

## Approved models (2)

- Cessna Aircraft Company 340 ([TCDS 3A25](https://openairdocs.org/tcds/3A25))
- Cessna Aircraft Company 340A ([TCDS 3A25](https://openairdocs.org/tcds/3A25))

## 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: SA30435W-D This certificate issued to: Century Flight Systems, Inc.

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

Original Product - Type Certificate Number: 3A25 Make: Cessna Model: 340, 340A Description of Type Design Change:

Installation of Mitchell Automatic Flight System Model AK525 consisting of a Century IV Autopilot or Model AK525FD consisting of a Century IV Flight Director Autopilot with Optional Remote Annunciator according to Bulletin No. 645, Revision 7, dated 2-21-79 and Master Drawing List No. 87A768, Revision G, dated 2-21-79 (28 Volt System) and/or later FAA Approved revisions of the above data.

Eligible on Cessna Model 340 With or Without the Modification FAA/DAS Approved Supplemental Flight Manual, P/N 68S221-1, dated 8-23-76 is required.

Placard, P/N 13A660-2 is required.

4-18-75; 10-28-75; 3-31-76;

8-23-76; 3-14-79; 6-22-84, Date of Issuance: 2-8-75 Date Amended: Revision 6 FEDERAL AVIATION By Direction of the Administrator Don P. Watson ( Signature ) DHINISTRATOR Manager, Aircraft Certification Division Southwest Region (Title)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and ZIP code) from (Name of grantor) (Print or type) (Address of grantor) (Number & street) (City, State, and ZIP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- June 22, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/2d/47/2d47965ec06c58f4a76664423a04abeb973a883dc2de9ee37a7a61aef2175dd2)

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