# STC SA1521SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system model AK393, consisting of Century I autopilot with optional omni tracker.
- Applied: September 28, 1972
- Status date: July 13, 1984
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1A15](https://openairdocs.org/tcds/1A15)
- Certificate PDF: https://openairdocs.org/files/sha256/2a/22/2a22970c8805392ad2ce353ce775b7a7596432c900346c58bfbf16556b0dc870
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/27F7F90F2B0A5E4D85256CC10082128E.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA1521SW

## ADs that name it (0)

None.

## Approved models (1)

- Piper Aircraft Inc. PA-24-260 ([TCDS 1A15](https://openairdocs.org/tcds/1A15))

## 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.

^Department or ^Transportation —federal atoiation administration Supplemental t;gpe Certificate SA1521SW ****£&> Century Flight Systems, Inc.

P.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 Civil Air yi£a4t£a/fj>nA ILJr€iui'Ha/ .yrcf£ue£ —— , 1A15 Piper PA-24-260 ,na&; Installation of Mitchell Automatic Flight System Model AK393, consisting of Century I Autopilot with optional Omni Tracker per Bulletin No. 515 dated 8-24-72 and Master Drawing List No. 87A618 dated 9-28-72.

Also eligible on Piper PA-24-260 Turbo-Charged per Piper Aircraft Drawing 27137.

Eligible on Serial Nos. 24-4783 and 24-4804 and up.

FAA Approved Airplane Flight Manual Supplement dated October 17, 1972 required.

iusnpeSmSLd^ ^e^al??/^ °ther prSViOUSly a^r°ved -difications ,JAi&> *&rttfica£t< •O'fva^Af Aufijtnfr&<nasj£a6a j&nicA i& foe t-adtA ff-r-aJt/i'tf-vafAsia/4iFttn*nn i'rv*Mff/'MM/I* Awe— 'r -. September 28, 1972 October 17, 1972 7-13-84, Revision 1 ^f a/f ftmftifffjf Don P. Watson Manager, Aircraft Certification Division Southwest Region (Title)

Ttiii certificate ma) bf tranifnrtd in aitordanct with ^AR 21.47.

FAAFWMinO-3(IO-4«|

INSTRUCTIONS. The iran&fer endorsement below may be used 10 notify the appropriate FAA Regional Office of ihe transfer of thii Supplemental Type Certificate.

The FAA will reissue the cenificale in the name of the transferee and forward it to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) and itrttt) (City. Slati. a.

from (Name of grantor) (Print or type) (Address of grantor) (Number and strttl} Cilf, SlaU. and £IP axil) Extent of Authority (if licensing agreement}:

Signature of grantor (In ink):

**C KAA AC 69-S536**

## Every issue (1)

- July 13, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/2a/22/2a22970c8805392ad2ce353ce775b7a7596432c900346c58bfbf16556b0dc870)

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