# STC SA3489SW-D - Type: Supplemental type certificate - Status: Current, Amended - Holder: Century Flight Systems Inc, United States - Description: Installation of a Century automatic flight system model AK996 consisting of a Century 2010/2030/2031/2050/2051 autopilot - Applied: December 10, 1991 - Status date: March 31, 1997 - Product: Aircraft, Small Airplane - Certification basis: Part 21 - Data sheets: [TCDS 3A15](https://openairdocs.org/tcds/3A15) - Certificate PDF: https://openairdocs.org/files/sha256/54/6a/546aaf348f4297a3fd71c6262423dc332443eb18aea2870e8c4a81046c26051e - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9ECFC3E8CD84DC4D85256CC2000A9890.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA3489SW-D ## ADs that name it (0) None. ## Approved models (12) - Beechcraft Corporation 35-33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15)) - Beechcraft Corporation 35-A33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15)) - Beechcraft Corporation 35-B33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15)) - Beechcraft Corporation 35-C33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15)) - Beechcraft Corporation 35-C33A ([TCDS 3A15](https://openairdocs.org/tcds/3A15)) - Beechcraft Corporation E33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15)) - Beechcraft Corporation E33A ([TCDS 3A15](https://openairdocs.org/tcds/3A15)) - Beechcraft Corporation E33C ([TCDS 3A15](https://openairdocs.org/tcds/3A15)) - Beechcraft Corporation F33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15)) - Beechcraft Corporation F33A ([TCDS 3A15](https://openairdocs.org/tcds/3A15)) - Beechcraft Corporation F33C ([TCDS 3A15](https://openairdocs.org/tcds/3A15)) - Beechcraft Corporation G33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15)) ## 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. United States of America iurait of dfcangpnriattou -Jfeitetal j^iriation Oferftftcate SA3489SW-D certificates i< Century Flight Systems, Inc. 3003 FM 11 95 P.O. Box610 Mineral Wells, TX 76067 t^wcl&4i<;^^wt/i&£olk>€t^^ 3 ofiftw Civil Aeronautics 3A1 5 BEECH 35-33, 35-A33, 35-B33, 35-C33, 35-C33A, E33, E33A, E33C, F33, F33A, (S/N 315 & Below), F33C, (S/N CJ- 30 & Below), and G33. Installation of a Century Automatic Flight System, Model AK996 consisting of a Century 2010/2030/2031/2050/2051 Autopilot per Bulletin No. 2054, dated 01-03-92, Revision 3 dated 03-17-97 and Master Drawing List No. 87A1218, dated 01-03-92, Revision C dated 03-17-97 (14 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 Supplements P/N 68S1053, dated 01-06-92 Rev. 2 dated 03-24-97 or later FAA/DAS Approved Revision and Century 2000 Autopilot Operator's Manual P/N 68S1035, dated 07- 15-86 Rev. 02-07-97 or later FAA Approved Revision. Century Yaw Damper Kit No. YK997, STC SA3449-D is compatible with, but not required by this modification. This approval should not be extended to other specific airplanes of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of the aircraft. arid' && mfifi&vtirup tteUa' i& the- &a&t& fiyv ajifvunnU' 12-10-91 01-10-92 .- 12-21-92 Rev. 2; 03-31-97 Rev. 3 (Signature) William R. Watson DAS Staff Coordinator DAS 7 SW (Title) Anv alteration of this certificate is punishable bv a fine of not exceeding $1,000, or imprisonment not exceeding 3 years, or both. FAA Foim 8110-2(10-68) .NSTRUCTIONS: The tracer endorsement below m.y be used to notify the appropriate FAA Regional Office of the transfer of this Supplemental Type Certificate. The 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) from (Name of grantor) (Print or type). (Address of grantor) I Cit>: Stalt, Extent of Authority (if licensing agreement): Signature of grantor (In ink): ## Every issue (1) - March 31, 1997: Amended, Current. [certificate](https://openairdocs.org/files/sha256/54/6a/546aaf348f4297a3fd71c6262423dc332443eb18aea2870e8c4a81046c26051e) --- 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.