# STC SA3134SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell Automatic Flight System Model AK593 consisting of Century III
Autopilot with Optional Radio Coupler and Glide Slope Coupler
- Applied: April 15, 1976
- Status date: June 5, 1984
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 1A15](https://openairdocs.org/tcds/1A15)
- Certificate PDF: https://openairdocs.org/files/sha256/fd/48/fd48da2c7316f9a2729f3716c182a8fae7098713e448725a58d4f3bf1fd664e9
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9BDC985C719E4D2585256CC2000A944C.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3134SW-D

## ADs that name it (0)

None.

## Approved models (1)

- Piper Aircraft Inc. PA-24-400 ([TCDS 1A15](https://openairdocs.org/tcds/1A15))

## 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: SA313454-D This certificate issued to: Century Flight Systems, Inc.

F.M. 1195 P. O. Box 610 Mineral Wells, TX 76067 Purt 3 of the CIVII Aix Regulations.

Original Product - Type berlificate Number 1A15 Make: Piper Model: PA-24-400 Description of Type Design Change:

Installation of Mitchell Automatic Flight System Model AK593 consisting of Century III Autopilot with Optional Radio Coupler and Glide Slope Coupler according to Bulletin No. 717, dated 4-14-76 and Master Drawing List No. 87A853, dated 4-14-76.

FAA/DAS Approved Airplane Flight Manual Supplement, P/N 685368, dated 5-10-76 1s required.

Placard, P/N 13A660 is required.

Tist cat an the suppeting sate shich is the basis for appreval shull memain in effeet unlit sur Compatibility of this modification with other previously approved modifications rendered, suspended, revoked, or a lermination date is otherwise es lablished by the Adminis brab a sf the Federal Aviation Administration .

Date of Application: 4-15-76 Jule missue: 6-05-84, Revision 1 Date of Issuance: 5-10-76 D'ale unended:

DERAL AVIATION By Direction of the Administrator Don P. Watson (Signature ) TIO Manager, Aircraft Certification Division VISTRI Southwest Region (Title)

47.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Yumber and streel) (CIl, State, and 2IP code) from (Name of grantor) (Print or type) (Address of grantor) (N'umber and sireel;

(City, Stake, and ZIP codes Extent of Authority (if licensing agreement):

Signature of grantor (In ink): - + 11 = r. 0~. 1090-262-180

## Every issue (1)

- June 5, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/fd/48/fd48da2c7316f9a2729f3716c182a8fae7098713e448725a58d4f3bf1fd664e9)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.