# STC SA3176SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell Automatic Flight System Model AK647 consisting of a
Century III Autopilot with Optional Radio Coupler and Glide Slope Couplet.
- Applied: January 27, 1977
- Status date: June 18, 1984
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-734](https://openairdocs.org/tcds/A-734)
- Certificate PDF: https://openairdocs.org/files/sha256/81/07/8107b1df63e6722406206d617fb9786b1d98f111a65970e77e8227b4bf947385
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8E8B0940D5DDB1EF85256CC2000A94D6.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3176SW-D

## ADs that name it (0)

None.

## Approved models (2)

- Gulfstream American Corporation G-44 ([TCDS A-734](https://openairdocs.org/tcds/A-734))
- Gulfstream American Corporation G-44A ([TCDS A-734](https://openairdocs.org/tcds/A-734))

## 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.

•Department of transportation —federal atriation Administration Supplemental t^pe Certificate L-/tea*j£a/n?nA SA3176SW-D Century Flight Systems, Inc.

F.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 vJi^Jy^i&deAAgtwfc&4ri&fe>tljC>ivi>n^/we>ctufJ A— 734 Gr unman G-44(OA-14;J4F-2) and G-44A Civil Air rMe/ :

Installation of Mitchell Automatic Flight System Model AK647 consisting of a Century III Autopilot with Optional Radio Coupler and Glide Slope Couplet per Bulletin No. 774, Revision 3, dated 7-15-81 and Master Drawing List No.

87A894, Revision C, dated 7-15-81 (28 Volt System) and/or later FAA Approved revisions of the above data.

Also eligible on the above models when equipped with Type Certificate approved Items 108 (A), (B) , or (C) and/or STC's SA4-928 (Retractable Tip Floats), SA835SO (290 H.P. Lycoming Engines), SA4-958 (Increased Fuel Capacity), SA4-2 (300 H.P. Lycoming Engines), and SA81SO (260 H.P. Continental 10470-M Engines with Cessna 310 Nacelles).

See Continuation Sheet, Part 2, a part of this STC «PPr°ved modifications >ij — fJ*x£t' t& 4A 1-27-77 ~s 7-11-77; 6-16-78; 7-27-81;

6-18-84, Revision 4 u' Don P. Watson Manager, Aircraft Certification Division Southwest Region ( Title )

This certificate may be transferred in accordance with FAR 21.17.

FAAFMMailO-2(1O-68)

United £totu of aaota Btpartmtnt of Transportation— Jpetoal atrtation administration Supplemental ¥gpe Certificate(Continuation $htet) SA3176SW-D, Rev, 4 dated 6-18-84 FAA/DAS Approved Airplane Flight Manual Supplement, P/N 68S442-1, Revision 2, dated 7-20-81 is required and/or later FAA Approved revisions of the above supplement .

Placard, P/N 13A660 is required,

FAA FORM ano-2-1 (io-69) TTas etrtifcatt may bi transftrrtd in accordanct with FAR 21.47.

**PAGE2 OF 2PAGES**

.NSTRUCTIONS: The transfer endorsement below m.y be used .o notify .he appropriate FAA Regional Office of the transfer of this Supplemental Type Certificate.

The FAA wilt reissue the certificate in the name of the transferee and forward i. to him.

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

(Address of transferee) _ from (Name of grantor) (Print or type).

(Address of grantor) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- June 18, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/81/07/8107b1df63e6722406206d617fb9786b1d98f111a65970e77e8227b4bf947385)

---
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.