# STC SA3486SW-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Century Automatic Flight System Model AK993 consisting of a Century 2110/2130/2131/2150/2151 autopilot.
- Applied: February 15, 1990
- Status date: August 23, 1999
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12)
- Certificate PDF: https://openairdocs.org/files/sha256/08/d9/08d949b33d35de9e62760ca022abce428567850dd84c2dacb767952b164d1230
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/10ED2D3BA8BF18B185256CC2000A988A.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3486SW-D

## ADs that name it (0)

None.

## Approved models (2)

- Cessna Aircraft Company 172P ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172R ([TCDS 3A12](https://openairdocs.org/tcds/3A12))

## 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: SA3486SW-D This certificate issued to: Century Flight Systems, Inc.

3003 FM 1195 P.O. Box 610 Mineral Wells, TX 76067 Part 3 of the Civil Air Regulations.

Original Product Type Certificate Number: 3A12 Make: CESSNA Model: 172P AND 172R Description of Type Design Change:

Installation of a Century Automatic Flight System, Model AK993 consisting of a Century 2110/2130/2131/ 2150/2151 Autopilot per Bulletin No. 2051, dated 02-15-90 Rev. 4 dated 08-16-99 and Master Drawing List No.

87A1216, dated 02-15-90 Rev. D dated 08-16-99 (28 Volt System) or later FAA/DAS Approved Revision.

FAA/DAS Approved Supplement to Pilot's Operating Handbook and/or FAA/DAS Approved Airplane Flight Manual Supplement P/N 68S1048, dated 02-15-90 Rev. 2 dated 08-16-99 or later FAA/DAS Approved Revision and Century 2000 Autopilot Operator's Manual P/N 68S1035 dated 07-15-86 Revision April 9, 1999 or later FAA Approved Revision.

Compatibility of this modification with other previously approved modifications must be determined by the If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give 1 08-23-99 Rev. 2 By Direction of the Administrator

FEDERAL AVIATION (Signature) TAMNISTRATIO William R. Watson DAS Staff Coordinator DAS 7 SW (Title) 47

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

(Address of transferee) (289195 pres saquers") 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. 0~. 1090-262-190

## Every issue (1)

- August 23, 1999: Amended, Current. [certificate](https://openairdocs.org/files/sha256/08/d9/08d949b33d35de9e62760ca022abce428567850dd84c2dacb767952b164d1230)

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