# STC SA09389AC-D - Type: Supplemental type certificate - Status: Current, Amended - Holder: S-TEC Corporation, United States - Description: Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-837-20/30. - Applied: September 15, 1998 - Status date: May 7, 1999 - Product: Aircraft, Single-Engine - Certification basis: Part 21 - Data sheets: [TCDS A4CE](https://openairdocs.org/tcds/A4CE) - Certificate PDF: https://openairdocs.org/files/sha256/1c/56/1c56768ccb8c2ac1319b39cfefb1ccc5f95fbd63aa024b39e5b6cf1ff1c96d70 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DDAD83AA370F19DD85256CC1007F3AD5.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA09389AC-D ## ADs that name it (0) None. ## Approved models (2) - Cessna Aircraft Company TU206G ([TCDS A4CE](https://openairdocs.org/tcds/A4CE)) - Cessna Aircraft Company U206G ([TCDS A4CE](https://openairdocs.org/tcds/A4CE)) ## 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: SA09389AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Certifies that the change in the type design for the felloing product with the limitations and conditions therefor as specified hereon meets the aircorthiness requiements of Part 3 of the Civil An Regulations. Original Product Type Certifcate A umber: A4CE Make: Cessna Model: U206G and TU206G Description of Type Design Change: Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-837-20/30, according to Bulletin No. 937, Revision 1, dated 5-04-99 and Master Drawing List No. 921118, Revision A, dated 5-04-99 or later FAA Approved revisions of the above data (28 Volt System). (See Continuation Sheets, Pages 2, 3, and 4, a part of this STC.) If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission. Date of Application: 9-15-98 Late rossued: Pate of sismance: 9-17-98 Date Amended: 5-07-99, Revision 1 By Direction of the Administrator ÇEDERAL AVIATION shall (Signature) TOMINISTRATOR Michael Keirnan DAS Staff Coordinator, DAS 5 SW (Title) FAA Form B110-2(10-68) Page 1 of 4 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09389AC-D, Revision 1 Limitations and Conditions: (con't.) Also eligible on Cessna models U206G and TU206G (landplane, floatplane, or amphibian configuration). Also eligible on Cessna models U206G and TU206G (landplane, floatplane, or amphibian configuration) when equipped with STC SA1513WE (Robertson STOL) or STC SA990CE (Horton STOL) and/or any combination of the following STCs: STC SA2353NM (Soloy engine conversion), STC SA3634SW (extended range fuel tanks), STC SA914NE (wing tip extensions). FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891790, dated 9-17-98 is required for Cessna Models U206G And TU206G (Landplane Configuration) And These Models When Modified Per STC SA3634SW (Extended Range Fuel Tanks) And/Or STC SA914NE (Wing Tip Extensions) for S-TEC System 20 or later FAA Approved revisions of the above supplement. 4. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891791, dated 9-17-98 is required for Cessna Models U206G And TU206G (Landplane Configuration) When Modified Per STC SA1513WE (Robertson STOL) And/Or STC SA914NE (Wing Tip Extensions) for S-TEC System 20 or later FAA Approved revisions of the above supplement. 5. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891792, dated 9-17-98 is required for Cessna Models U206G And TU206G (Landplane Configuration) When Modified Per STC SA2353NM (Soloy Engine Conversion) With Or Without STC SA3634SW (Extended Range Fuel Tanks) And/Or STC SA914NE (Wing Tip Extensions) for S-TEC System 20 or later FAA Approved revisions of the above supplement. 6. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891793, dated 9-17-98 is required for Cessna Models U206G And TU206G (Floatplane or Amphibian Configuration) And These Models When Modified Per STC SA3634SW (Extended Range Fuel Tanks) And/Or STC SA2353NM (Soloy Engine Conversion) And/Or STC SA914NE (Wing Tip Extensions) for S-TEC System 20 or later FAA Approved revisions of the above supplement. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891794, dated 9-17-98 is required for Cessna Models U206G And TU206G (Floatplane or Amphibian Configuration) When Modified Per STC SA1513WE (Robertson STOL) And/Or STC SA914NE (Wing Tip Extensions) for S-TEC System 20 or later FAA Approved revisions of the above supplement. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891795, dated 9-17-98 is required for Cessna Models U206G And TU206G (Landplane Configuration) And These Models When Modified Per STC SA3634SW (Extended Range Fuel Tanks) And/Or STC SA914NE (Wing Tip Extensions) for S-TEC System 30 or later FAA Approved revisions of the above supplement. FAR Form 8110-2-1(10-69) Page 2 of 4 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09389AC-D, Revision 1 Limitations and Conditions: (con't.) 9. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891796, dated 9-17-98 is required for Cessna Models U206G And TU206G (Landplane Configuration) When Modified Per STC SA1513WE (Robertson STOL) And/Or STC SA914NE (Wing Tip Extensions) for S-TEC System 30 or later FAA Approved revisions of the above supplement. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891797, dated 9-17-98 is required for Cessna Models U206G And TU206G (Landplane Configuration) When Modified Per STC SA2353NM (Soloy Engine Conversion) With Or Without STC SA3634SW (Extended Range Fuel Tanks) And/Or STC SA914NE (Wing Tip Extensions) for S-TEC System 30 or later FAA Approved revisions of the above supplement. 11. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891798, dated 9-17-98 is required for Cessna Models U206G And TU206G (Floatplane or Amphibian Configuration) And These Models When Modified Per STC SA3634SW (Extended Range Fuel Tanks) And/Or STC SA2353NM (Soloy Engine Conversion) And/Or STC SA914NE (Wing Tip Extensions) for S-TEC System 30 or later FAA Approved revisions of the above supplement. 12. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891799, dated 9-17-98 is required for Cessna Models U206G And TU206G (Floatplane or Amphibian Configuration) When Modified Per STC SA1513WE (Robertson STOL) And/Or STC SA914NE (Wing Tip Extensions) for S-TEC System 30 or later FAA Approved revisions of the above supplement. 13. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891790, Revision 1, dated 5-07-99 is required for Cessna models U206G and TU206G (landplane configuration) and these models when equipped with STC SA1513WE (Robertson STOL) or STC SA990CE (Horton STOL) and/or any combination of the following STCS: STC SA914NE (wing tip extensions), STC SA3634SW (extended range fuel tanks) for S-TEC System 20 or later FAA Approved 14. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891792, Revision 1, dated 5-07-99 is required for Cessna models U206G and TU206G (landplane configuration) when equipped with STC SA2353NM (Soloy engine conversion) and/or any combination of the following STCs: STC SA3634SW (extended range fuel tanks), STC SA914NE (wing tip extensions), STC SA990CE (Horton STOL) for S-TEC System 20 or later FAA Approved revisions of the above supplement. FAA Form B110-2-1(10-69) Page 3 of - United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09389AC-D, Revision 1 Limitations and Conditions: (con't.) 15. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891793, Revision 1, dated 5-07-99 is required for Cessna models U206G and TU206G (floatplane or amphibian configuration) and these models when equipped with any combination of the following STCS: STC SA3634SW (extended range fuel tanks), STC SA2353NM (Soloy engine conversion), STC SA914NE (wing tip extensions), STC SA990CE (Horton STOL) for S-TEC System 20 or later FAA Approved revisions of the above supplement. 16. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891794, Revision 1, dated 5-07-99 is required for Cessna models U206G and TU206G (floatplane or amphibian configuration) when equipped with STC SA1513WE (Robertson STOL) or STC SA990CE (Horton STOL) and/or STC SA914NE (wing tip extensions) for S-TEC System 20 or later FAA Approved revisions of the above supplement. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891795, Revision 1, dated 5-07-99 is required for Cessna models U206G and TU206G (landplane configuration) and these models when equipped with STC SA1513WE (Robertson STOL) or STC SA990CE (Horton STOL) and/or any combination of the following STCs: STC SA914NE (wing tip extensions), STC SA3634SW (extended range fuel tanks) for S-TEC System 30 or later FAA Approved revisions of the above supplement. 18. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891797, Revision 1, dated 5-07-99 is required for Cessna models U206G and TU206G (landplane configuration) when equipped with STC SA2353NM (Soloy engine conversion) and/or any combination of the following STCs: STC SA3634SW (extended range fuel tanks), STC SA914NE (wing tip extensions), STC SA990CE (Horton STOL) for S-TEC System 30 or later FAA Approved revisions of the above supplement. 19. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891798, Revision 1, dated 5-07-99 is required for Cessna models U206G and TU206G (floatplane or amphibian configuration) and these models when equipped with any combination of the following STCs: STC SA3634SW (extended range fuel tanks), STC SA2353NM (Soloy engine conversion), STC SA914NE (wing tip extensions), STC SA990CE (Horton STOL) for S-TEC System 30 or later FAA Approved revisions of the above supplement. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891/99, Revision 1, dated 5-07-99 is required for Cessna models U206G and TU206G (floatplane or amphibian configuration) when equipped with STC SA1513WE (Robertson STOL) or STC SA990CE (Horton STOL) and/or STC SA914NE (wing tip extensions) for S-TEC System 30 or later FAA Approved revisions of the above supplement. 21. Compatibility of this modification with other previously approved modifications must be determined by the installer. FAA Form 8110-2-1 (10-69) Page 4 of 4 TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) _ (Address of transferee) _ (Number and street) (City, State, and ZIP code) from (Name of grantor) (Print or type) (Address of grantor) (Number & street) (City, State, and ZIP code) Extent of Authority (if licensing agreement): Signature of grantor (In ink): ## Every issue (1) - May 7, 1999: Amended, Current. [certificate](https://openairdocs.org/files/sha256/1c/56/1c56768ccb8c2ac1319b39cfefb1ccc5f95fbd63aa024b39e5b6cf1ff1c96d70) --- 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.