# STC SA3433SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Century Automatic Flight System Model AK937 consisting of a Century 21 autopilot
- Applied: July 22, 1985
- Status date: August 1, 1985
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A31EU](https://openairdocs.org/tcds/A31EU)
- Certificate PDF: https://openairdocs.org/files/sha256/6b/c2/6bc29381eb62a47d774814c493f9fe75286802ed69c6aa18f01180186ad7ccd1
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DC25082D0194BE7D85256CC2000A9807.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3433SW-D

## ADs that name it (0)

None.

## Approved models (3)

- Vulcanair S.p.A. P 68B ([TCDS A31EU](https://openairdocs.org/tcds/A31EU))
- Vulcanair S.p.A. P 68C ([TCDS A31EU](https://openairdocs.org/tcds/A31EU))
- Vulcanair S.p.A. P 68C-TC ([TCDS A31EU](https://openairdocs.org/tcds/A31EU))

## 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.

Unitri Bepartmcnt of tonsportation — federal 2toiation administration Supplemental 'Cjipc Certificate Century Flight Systems, Inc.

.-P.M. 1195 P.O. Box 610 Mineral Wells, Texas 76067 /mte& 23 Federal Aviation A31EU Partenavia P68B,P68C?P68C-.TC nM :

Installation of Century Automatic Flight System Model AK937 consisting of a Century 21 Autopilot per Bulletin No, 1068, dated 7-22-85 and Master Drawing List No, 87AHA6, dated 7-22-85 (28 Volt System) and/or 'later FAA approved revision, FAA Approved Supplemental Flight Manual, P/N 68S977 dated 7-22-85 is required and/or later approved revision.

Compatibility of this modification with other previously approved modifications must be determined by the installer, 7-22-85 8-01-85 Jtt^^^ /n4x&(>n^ S£dmAvuA£r<i&>i>'Jt^ ^ a (Signature )hns DAS Staff Coordinator DAS 7 (Till*)

This artificate may 6* transferrtd in accordance with FAR 21.17.

FAAFaiMlllO-2(10-«8)

INDUCTIONS: The transfer endorsement bc.ow may be used .o n<xify the appropriate FAA Kegiona. Office of the transfer of this Supplemental Type Certificate.

The FAA will reissue the certificate in the name of the traiuferee and forward it to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee).

(Address of transferee). f AiimArr tnd strut) (City. Slalt. ««/ Z'P «**" from (Name of grantor) (Print or type).

(Address of grantor) (City, Sltti, Ejctent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- August 1, 1985: Issued, Current. [certificate](https://openairdocs.org/files/sha256/6b/c2/6bc29381eb62a47d774814c493f9fe75286802ed69c6aa18f01180186ad7ccd1)

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