# STC SA3016SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system mode AK499 consisting of a Century IV autopilot or AK499FD consisting of a Century IV flight director autopilot with optional remote annunciator.
- Applied: August 9, 1974
- Status date: August 1, 1984
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A20SO](https://openairdocs.org/tcds/A20SO)
- Certificate PDF: https://openairdocs.org/files/sha256/6c/af/6cafaac36dea20d08b4fce8589cec7160c7b87b626dbb3228f6db7e3b6f51931
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3B474F763FDED1F785256CC2000A92B8.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3016SW-D

## ADs that name it (0)

None.

## Approved models (1)

- Piper Aircraft Inc. PA-31-350 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO))

## 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.

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•Department or Transportation -federal SlDiation administration Supplemental ICgpe Certificate tSbwrrwer'SA3016SW-D Century Flight Systems, Inc.

F.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 3 Civil Air A8EA Piper PA-31-350 nae :

Installation of Mitchell Automatic Flight System Model AK499 consisting of a Century IV Autopilot or AK499FD consisting of a Century IV Flight Director Autopilot with Optional Remote Annunciator according to Bulletin No. 622, Revision 6, dated 11-15-77 and Master Drawing List No. 87A732, Revision F, dated 11-15-77 (.28 Volt System) and/or later FAA Approved Revisions of the above data, FAA/DAS Approved Airplane Flight Manual Supplement, P/N 68S192-2-S, dated 4-28-78 is required for Piper Model PA-31-350, S/N 31-7752000 and Below.

FAA/DAS Approved Pilot's Operating Handbook Supplement, P/N 68S621, dated 4-28-78 is required for Piper Model PA-31-350, S/N 31-7752001 and Up and/or later FAA Approved Revisions of the above Supplements.

Continuation Sheet, Page 2, a part of this STC 1 1lth other P-viously approved .edifications 8-9-74 8-16-74 8-23-76; 2-1-77; 4-28-78;

8-1-84, Revision 4 P. Watson V Manager, Aircraft Certification Division Southwest Region (TMt)

fMted SStaa of 9itrfca Btpattmcnt of Transportation -federal aoiation administration upplemental t^pe Certificate(Continuation 3heet) SA3016SW-D, Revision 4, dated 8-1-8^ LIMITATIONS AND CONDITIONS:

Placard, P/N 13A660 is required for Airplane Flight Manual owners.

Placard, P/N 13A660-1 is required for Pilot's Operating Handbook owners.

FAA FORM BiiO.i-1 C10-W) Thu cirtifcok may tt Iraasfintd in aatadaut utM FAR 21.47.

**PAOS 2 OF 2 PAGES**

Tha FAA will reissue the certificate 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) ___ (Number and street) (City, State, and ZIP cods) 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 ink)

## Every issue (1)

- August 1, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/6c/af/6cafaac36dea20d08b4fce8589cec7160c7b87b626dbb3228f6db7e3b6f51931)

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