# STC SA09270AC-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-722-20/30. - Applied: August 13, 1997 - Status date: April 23, 1999 - Product: Aircraft, Single-Engine - Certification basis: Part 21 - Data sheets: [TCDS 3A24](https://openairdocs.org/tcds/3A24) - Certificate PDF: https://openairdocs.org/files/sha256/66/95/6695b89febdd478b3e1f77f67420b8cb47171b38b0c546054a15bc9bb28a4a55 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D58678418661E03185256CC1007F3A55.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA09270AC-D ## ADs that name it (0) None. ## Approved models (1) - Cessna Aircraft Company A185F ([TCDS 3A24](https://openairdocs.org/tcds/3A24)) ## 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: SA09270 AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Last 3 of the Cird di Kegulations. Original Product I ype Cerlificate A umber: 3A24 Make: Cessna Model: A 185F Description of Type Design Change: Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-722-20/30, according to Bulletin No. 822, Revision 3, dated 4-20-99 and Master Drawing List No. 921021, Revision C, dated 4-20-99 or later FAA Approved revisions of the above data (28 Volt System). Also eligible on the above model (landplane, floatplane or amphibian) when equipped with STC SA1441 WE (Robertson STOL) or STC SA968CE (Horton STOL) and/or STC SA2529WE (internal tip tanks). (See Continuation Sheets, Page 2 and 3 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. verched or a termination date is ethercise estabished by the A duinistator of the Federal d vintion A duinstation. Date of Application: 8-13-97 Late vessued: Date of Issuance: 8-15-97 Date Amended: 4-23-99, Revision 1 By Direction of the Administrator FEDERAL AVIATION (Signature) TOMINSTRATO Michael Keirnan DAS Staff Coordinator, DAS 5 SW (Title) United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09270AC-D, Revision 1 Limitations and Conditions: (con't.) FAA/DAS Approved Supplemental Flight Manual, P/N 891503, dated 8-15-97 is required for Cessna Model A185F, S/N 18503683 and Below (Landplane, Floatplane or Amphibian) And The Above Model When Modified Per STC SA2529WE (Internal Tip Tanks) and/or STC SA1441 WE (Robertson STOL) for S-TEC System 20 or later FAA Approved revisions of the above supplement. 3_ FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891504, dated 8-15-97 is required for Cessna Model A185F, S/N 18503684 and Up (Landplane, Floatplane or Amphibian) And The Above Model When Modified Per STC SA2529WE (Internal Tip Tanks) and/or STC SA1441WE (Robertson STOL) for S-TEC System 20 or later FAA Approved revisions of the above supplement. 4. FAA/DAS Approved Supplemental Flight Manual, P/N 891507, dated 8-15-97 is required for Cessna Model A 185F, S/N 18503683 and Below (Landplane, Floatplane or Amphibian) And The Above Model When Modified Per STC SA2529WE (Internal Tip Tanks) and/or STC SA1441 WE (Robertson 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 891508, dated 8-15-97 is required for Cessna Model A185F, S/N 18503684 and Up (Landplane, Floatplane or Amphibian) And The Above Model When Modified Per STC SA2529WE (Internal Tip Tanks) and/or STC SA1441 WE (Robertson STOL) for S-TEC System 30 or later FAA Approved revisions of the above supplement. 6. FAA/DAS Approved Supplemental Flight Manual, P/N 891503, Revision 1, dated 4-23-99 is required for Cessna model A185F, S/N 18503683 and below (landplane, floatplane or amphibian) and the above model when equipped with STC SA1441WE (Robertson STOL) or STC SA968CE (Horton STOL) and'or STC SA2529WE (internal tip tanks) 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 891504, Revision 1, dated 4-23-99 is required for Cessna model A185F, S/N 18503684 and on (landplane, floatplane or amphibian) and the above model when equipped with STC SA1441WE (Robertson STOL) or STC SA968CE (Horton STOL) and/or STC SA2529WE (internal tip tanks) for S-TEC System 20 or later FAA Approved revisions of the above supplement. FAA Form 8110-2-1 (10-69) Page 2 of 3 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09270AC-D, Revision 1 Limitations and Conditions: (con't.) 8. FAA/DAS Approved Supplemental Flight Manual, P/N 891507, Revision 1, dated 4-23-99 is required for Cessna model A185F, S/N 18503683 and below (landplane, floatplane or amphibian) and the above model when equipped with STC SA1441WE (Robertson STOL) or STC SA968CE (Horton STOL) and/or STC SA2529WE (internal tip tanks) for S-TEC System 30 or later FAA Approved revisions of the above supplement. 9. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891508, Revision 1, dated 4-23-99 is required for Cessna model A185F, S/N 18503684 and on (landplane, floatplane or amphibian) and the above model when equipped with STC SA1441WE (Robertson STOL) or STC SA968CE (Horton STOL) and/or STC SA2529WE (internal tip tanks) for S-TEC System 30 of later FAA Approved revisions of the above supplement. 10. Compatibility of this modification with other previously approved modifications must be determined by the installer. FAA Form 8110-2-1110-69) Page 3 of 3 TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Numbet and street) (City, State, and ZIP code) from (Name of grantor) (Print or type) (Address of grantor) (Number & street) (City, State, and SIP code) Extent of Authority (if licensing agreement): Signature of grantor (In ink): ## Every issue (1) - April 23, 1999: Amended, Current. [certificate](https://openairdocs.org/files/sha256/66/95/6695b89febdd478b3e1f77f67420b8cb47171b38b0c546054a15bc9bb28a4a55) --- 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.