# STC SA3174SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system model AK645 consisting of Century I autopilot with optional omni tracker system.
- Applied: December 15, 1966
- 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/c2/b0/c2b0fd51a715d32fd5b8fd8ce7a5db33a6008285d8230351f54899d0afa1b994
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CD37C71A6EC7EE2B85256CC2000A94D1.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3174SW-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

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA317456-0 This certificate issued to: ' Century Flight Systems, Inc.

F.M. 1195 P. O. Box 610 Mineral Wells, TX 76067 Part. 42 of the CIV11 AIT Regulations:

Original Product - Type bentificate Number: A-734 Make: Grumman Model: G-44 (OA-14; J4F-2) and G-44A Description of Type Design Change:

Installation of Mitchell Automatic Flight System Model AK645 consisting of Century I Autopilot with Optional Omni Tracker System according to Bulletin No. 772, Revision 1, dated 5-25-77 and Master Drawing List No. 87A892, Revion A, dated 5-25-77.

Limitations and Conditions: Eligible on 28 Volt aircraft only. Also eligible on the above models when equipped with Type Certificate Approved Engine Items 108(A), (B) or (C) and/or STC's SA4-928 (Rectractable Tip Floats), SA835SO (290 H.P.

Lycoming Engines), SA4-958 (Increased Fuel Capacity) and SA4-2 (300 H.P. Lycoming Engines).

FAA/DAS Approved Airplane Flight Manual Supplement, P/N 685440-1, dated 7-8-77 compaffbifity of this modification with other previously approved modifications

Date of Application: 12-15-66 Jule missued: 7-8-77; 6-18-84, Revision 2 Date of Issuance: 1-31-77 Sale umended:

EDERAL AVIATION By Direction of the Administrator Don P. Watson (Signature) TOMINISTRANO Manager, Aircraft Certification Division Southwest Region (Tille )

47.

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

(Address of transferee) (179175 preo sequen) from (Name of grantor) (Print or sype) (Address of grantor) ( Number and sireel ;

Signature of grantor (In ink):

+ 118 r. 00. 1090-882-190

## Every issue (1)

- June 18, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/c2/b0/c2b0fd51a715d32fd5b8fd8ce7a5db33a6008285d8230351f54899d0afa1b994)

---
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.