# STC SA3131SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell Automatic Flight System Model AK447, Century IV Autopilot or
AK447FD, Century IV Flight Director Autopilot with Optional Remote Annunciator,
- Applied: April 19, 1976
- Status date: June 5, 1984
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 3A16](https://openairdocs.org/tcds/3A16)
- Certificate PDF: https://openairdocs.org/files/sha256/86/fc/86fc3b83c99624f4d5e7c4fbfcbd08dfd125ab90025d4d523b9f7bc988dc2edc
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/556777921D8F428E85256CC2000A9444.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3131SW-D

## ADs that name it (0)

None.

## Approved models (2)

- Beechcraft Corporation 58 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Beechcraft Corporation 58A ([TCDS 3A16](https://openairdocs.org/tcds/3A16))

## 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: SA31315W-D This certificate issued to: Century Flight Systems, Inc.

F.M. 1195 P. O. Box 610 Mineral Wells, IX 76067 Certifies that the change in the type design for the following product with the limilations and conditions thorefor as specified hereon meets the airvorthiness reguirements of Part 3 of the CIVI1 Air Regulations:

Original Product - Type Certificate Numben: ЗА16 Make: Beech Model: 58, 58A Description of Type Design Change:

Installation of Mitchell Automatic Flight System Model AK447, Century IV Autopilot or AK447FD, Century IV Flight Director Autopilot with Optional Remote Annunciator, according to Bulletin No. 570-1, Revision 2, dated 8-27-76 and Master Drawing List Limitations and Conditions:

FAA/DAS Approved Airplane Flight Manual Supplement, P/N 68S373-1, dated 7-22-76 1s required.

Placard, P/N 13A660 is required.

This bleaten the supperting sale which is the basis fin appo val shall remain in effect unlil sur Compatibility of this modification with other previously approved modifications vendered, suspended, vevoked, on a termination date is otherwise estabdished by the Adminis bral. a if the Federal Aviation Administration .

Date of Application: 4-19-76 Jule missused 7-22-76; 9-22-76;

6-05-84, Revision 3 Date of Issuance: 4-22-76 Sale unvented AVIATIO By Direction of the Administrator Don P. Watson (Signalure) PNINISTRALO Manager, Aircraft Certificatfon Division Southwest Region (Tille)

47.

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

(Address of transferee) (230185 pro sequer\") from (Name of grantor) (Print or type) (Address of grantor) ( Number and sireel ;

Signature of grantor (In ink):.

+11 = r. n. 1090-862-080

## Every issue (1)

- June 5, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/86/fc/86fc3b83c99624f4d5e7c4fbfcbd08dfd125ab90025d4d523b9f7bc988dc2edc)

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