# STC SA3029SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system model AK521 consisting of Century III autopilot with optional radio coupler and glide slope coupler
- Applied: November 17, 1974
- Status date: June 20, 1984
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A17WE](https://openairdocs.org/tcds/A17WE)
- Certificate PDF: https://openairdocs.org/files/sha256/3a/28/3a285e10f698321ac7efccf5a2c21d4d4858187675b8f31ff55044fd09acc0f4
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/82DFC0A88916794F85256CC2000A92E1.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3029SW-D

## ADs that name it (0)

None.

## Approved models (3)

- Aerostar Aircraft Corporation PA-60-600 (Aerostar 600) ([TCDS A17WE](https://openairdocs.org/tcds/A17WE))
- Aerostar Aircraft Corporation PA-60-601 (Aerostar 601) ([TCDS A17WE](https://openairdocs.org/tcds/A17WE))
- Aerostar Aircraft Corporation PA-60-601P (Aerostar 601P) ([TCDS A17WE](https://openairdocs.org/tcds/A17WE))

## 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.

tSleQjda&o £Jfi&vna4 <%£ Bcpartmtnt of transportation— federal Sloiation administration SupplementalCertificate <yKu#rbver' SA3029SW-D Century Flight Systems, Inc.

P.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 ' .tta4flwtrltri Al/WE Aerostat 60°. 601.

23 Federal na* :

Installation of Mitchell Automatic Flight System Model AK.521 consisting of Century III Autopilot with Optional Radio Coupler and Glide Slope Coupler according to Bulletin No. 642, Revision 4, dated 6-21-77 and Master Drawing List No. 87A754, Revision D, dated 6-21-77 FAA/DAS Approved Airplane Flight Manual Supplement, P/N 68S209-2, dated 11-27-74, revised 6-24-77 is required.

11-17-74 11-27-74 approved modifications — /• 1-10-75; 8-22-75; 9-16-76;

6-24-77, 6-20-84, Revision 5 Don P. Watson Manager, Aircraft Certification Division Southwest Region (T,th) Any alleralion of this certificate is punishable by a fine of not txcttding tl ,000, or imprisonment not exceeding 3 year*, o' both.

This arttficale may be Irarufnitd in accoidanee with f-AK 2!.17.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number_ to (Name of transferee) (Address of transferee) (Number and (City, State, and ZIP code) from (Name of grantor) (Print or type) (Address of grantor) (Number £ street) (City, State, and ZIP code) Extant of Authority (if licensing agreement):

Signature of grantor (In ink)

## Every issue (1)

- June 20, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/3a/28/3a285e10f698321ac7efccf5a2c21d4d4858187675b8f31ff55044fd09acc0f4)

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