# STC SA3009SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system model AK496 consisting of a Century IV autopilot or AK496FD consisting of a Century IV flight director autopilot with electric elevator pitch trim and optional remote annuciator panel.
- Applied: June 27, 1974
- Status date: August 1, 1984
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A8EA](https://openairdocs.org/tcds/A8EA)
- Certificate PDF: https://openairdocs.org/files/sha256/93/3e/933eba563428e2b8b0638be8b0ebd6aeec56f5600810235b5589201c40a4878f
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C104BB1DA5CA90BF85256CC2000A92A1.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3009SW-D

## ADs that name it (0)

None.

## Approved models (6)

- Piper Aircraft Inc. PA-31P ([TCDS A8EA](https://openairdocs.org/tcds/A8EA))
- Piper Aircraft Inc. PA-31P-350 ([TCDS A8EA](https://openairdocs.org/tcds/A8EA))
- Piper Aircraft Inc. PA-31T ([TCDS A8EA](https://openairdocs.org/tcds/A8EA))
- Piper Aircraft Inc. PA-31T1 ([TCDS A8EA](https://openairdocs.org/tcds/A8EA))
- Piper Aircraft Inc. PA-31T2 ([TCDS A8EA](https://openairdocs.org/tcds/A8EA))
- Piper Aircraft Inc. PA-31T3 ([TCDS A8EA](https://openairdocs.org/tcds/A8EA))

## 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: SA3009 54-D This certificate issued to: Century Flight Systems, Inc.

F.M. 1195 P. O. Box 610 Mineral Wells, TX 76067 Certifies that the change in the type design for the following product with the limitalions and conditions shorefor as specified hereon meets the airworthiness reguirements of Purl 3 of the CIV11 Air Regulations:

Original Product - Type Portificate Numben: ASEA Make: Piper Model: PA-31 Description of Type Design Change: Installation of Mitchell Automatic Flight Syster AK496 consisting of a Century IV Autopilot or AK496FD consisting of a Century I Flight Director Autopilot with optional Remote Annunciator Panel according to Bulletin No. 614, Revision 9, dated 11-15-77 and Master Drawing List No. 87A727, Revision I, dated 11-15-77 (28 Volt System) and/or later FAA Approved Revisions of the above Limitations and Conditions:

See Continuation Sheet, Page 2, a part of this STC vendered, suspended, revoked, or a lermination date is otherwise es lablished by the Administrater of the Federal Aviation Administration .

Date of Application: 6-27-74 Jule issued 2-26-75; 8-23-76; 2-1-77;

4-28-78; 8-1-84, Revision 5 Date of Issuance: . 7-12-74 I ate unvended.

FEDERAL AVIATION -Don P. Watson (Signature ) TOMINISTRA Manager, Aircraft Certification Division Southwest Region (Title) 47 FAA FORM 8110-2 (10-68)

*nitro States of Sumerica Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA30095N, Revision 5, dated 8-1-84 Limitations and Conditions:

This modification is limited to Piper Model PA-31, S/N 31-660 and S/N 31-712 FAA/DAS Approved Airplane Flight Manual Supplement, P/N 68S183-3-S, dated 4-28-78 is required for Piper Model PA-31, S/N 31-660 and S/N 31-712 thru S/N 31-7712000. FAA/DAS Approved Pilot's Operating Handbook Supplement, P/N 685020, dated 4-28-78 is required for Piper Model PA-31, S/N 31-7712001 and Up and/or later FAA Approved Revisions of the above Supplements. Placard, P/N 13A660 is required for owners with Airplane Flight Manuals. Placard, P/N 13A660-1 is required for owners with Pilot's Operating Handbooks.

**FAA FORM 8110-2-1 (10-69) PAGE 2 OF 2 PAGES**

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)

- August 1, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/93/3e/933eba563428e2b8b0638be8b0ebd6aeec56f5600810235b5589201c40a4878f)

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