# STC SA3028SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell Automatic Flight system model AK481, consisting of Piper altimatic IIIC autopilot with command/automatic electronic pitch trim system, optional radio coupler and glide slope coupler
- Applied: October 21, 1974
- Status date: August 16, 1984
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A1EA](https://openairdocs.org/tcds/A1EA)
- Certificate PDF: https://openairdocs.org/files/sha256/86/65/8665dda43fe08952afc7b981e208dd2faa52cebbf023e93662660ee8e417fb70
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BEBFE7B10E1D117E85256CC2000A92DE.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3028SW-D

## ADs that name it (0)

None.

## Approved models (1)

- Piper Aircraft Inc. PA-40 ([TCDS A1EA](https://openairdocs.org/tcds/A1EA))

## 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.

fcjftri jBtatu of arnica Bepartment of Transportation — federal dotation administration Supplemental ICgpe Certificate <_/uvm&&r' SA3028SW-D '.nt&4t£lL&f>Tl4:.

Century Flight Systems, Inc.

P.M. 1195 P.O. Box 610 Mineral Wells, TX 76067 *«.<St^.*^A*-a4yj^«-y^.vS^j(&<}^'t>^ A Civil Air A1EA Piper PA-40 Installation of Mitchell Automatic Flight System Model AK481, consisting of Piper Altimatic IIIC Autopilot with Command/Automatic Electronic Pitch Trim System, Optional Radio Coupler and Glide Slope Coupler according to Bulletin No. 603, dated 10-18-74 and Master Drawing List No. 87A744, dated 10-18-74.

FAA/DAS approved AFM P/N 68S202, dated 10-18-74 is required.

Placard P/N 13A660 is required for Command/Electric Trim.

Conpatlbllity of thla modification with other previously approved modifications be determined by the installer.

J!fo^>a^ / *. ,AJ<f^fSj^, 10-21-74 10-28-74

- •"*•• 8-16-84, Revision 1

•&&— / Don P. Watson Manager, Aircraft Certification Division Southwest Region (TitU)

Tku certijuatr may kt traufrmd in taatdana with FAR 21.47.

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

## Every issue (1)

- August 16, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/86/65/8665dda43fe08952afc7b981e208dd2faa52cebbf023e93662660ee8e417fb70)

---
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.