# STC SA3221SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system model AK706 consisting of Century III autopilot with optional radio coupler and glide slope coupler.
- Applied: May 27, 1977
- Status date: December 7, 1983
- 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/c0/7e/c07e0a9ae4b60f1bdef4cc6e57830592ae30fede4660afb797306909f30c8e87
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/580586BBF9FCFE8D85256CC2000A9578.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3221SW-D

## ADs that name it (0)

None.

## Approved models (1)

- Gulfstream American Corporation SCAN Type 30 ([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.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number 5A322151-0 This certificate issued to: Century Flight Systems, Inc.

F.M. 1195 P. O. Box 610 Mineral Wells, TX 76067 Part 48 of the CIV11 AIr Regulations.

Original Product - Type bentificate Number: A-734 Make: Grumman Model: scan Type 30 Description of Type Design Change:

Installation of Mitchell Automatic Flight System Model AK706 consisting of Century III Autopilot with Optional Radio Coupler and Glide Slope Coupler according to Bulletin No. 839, dated 5/25/77 and Master Drawing List No. 87A935, dated 5/25/77 or later FAA approved revision Limitations and Conditions: 1. E1181ble on 28 Volt a1rcraft only. 2. Also eligible on Scan Type 30 when equipped w/Type Certificate approved Item 108(a), (B), or (C) and/or STC's SA4-928 (Retractable T1p Floats), SA835S0 (290 H.P.Lycoming Engines), SA4-958 (Incr.Fuel Capacity) and SA4-2 (300 H.P. Lycoming Engines)

3. FAA/DAS Approved Airplane Flight Manual Supplement P/N 68S563 dated 6/24/77 18 required. Placard P/N 13A660 1s required.

4. Compatibility of the modification with other previously approved modifications yet beaten dore and the supperling at which is the basis fur appr val shull remain in effect until sur vendered, suspended, nevoked, or a termination date is hervise established by the drinis brat. v of the Federal Aviation Administration .

Date of Application: 5/27/77 Sute missuerd: 12/7/83 Revision 1 Date of Issuance: . 6/24/77 Date Amended:

EDERAL AVIATION HOMINISTA TION Don P. Watson Manager, Aircraft Certification Division (Signature ) Southwest Region (Title)

47.

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

(Address of transferee) (Yumber and streel) from (Name of grantor) (Print or type) (Address of grantor) (Number and sireel ;

(City, Stake, and ZIP code ) Extent of Authority (if licensing agreement):.

Signature of grantor (In ink):..

+ 11 = r. 01. 1090-982-187

## Every issue (1)

- December 7, 1983: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/c0/7e/c07e0a9ae4b60f1bdef4cc6e57830592ae30fede4660afb797306909f30c8e87)

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