# STC SA7181SW-D - Type: Supplemental type certificate - Status: Current, Amended - Holder: S-TEC Corporation, United States - Description: Installation of S-TEC System 65 Two Axis Automatic Flight Guidance System, Model ST-444. - Applied: June 8, 1988 - Status date: January 15, 1999 - Product: Aircraft, Single-Engine - Certification basis: Part 21 - Data sheets: [TCDS 5A6](https://openairdocs.org/tcds/5A6) - Certificate PDF: https://openairdocs.org/files/sha256/a6/a9/a6a9c9700f0544cc778f2e5074530a158ffeb4380d4022ec6c736c52f0bc7ea3 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1892E2749EDFAE0385256CC20056A1E3.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA7181SW-D ## ADs that name it (0) None. ## Approved models (11) - The Cessna Aircraft Company 180 ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - The Cessna Aircraft Company 180A ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - The Cessna Aircraft Company 180B ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - The Cessna Aircraft Company 180C ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - The Cessna Aircraft Company 180D ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - The Cessna Aircraft Company 180E ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - The Cessna Aircraft Company 180F ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - The Cessna Aircraft Company 180G ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - The Cessna Aircraft Company 180H ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - The Cessna Aircraft Company 180J ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - The Cessna Aircraft Company 180K ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) ## 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: SA7181SW-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Part 3 of the hivl A is Regulations. Original Product I ype Certifcate Number: 5A6 Matio: Cessna Model: 180, 180A, 180B, 180C, 180D, 180E, 180F, 180G, 180H, 180J, and 180K Description of Type Design Change: Installation of S-TEC System 65 Two Axis Automatic Flight Guidance System, Model ST-444, according to Bulletin No. 544, Revision 2, dated 1-12-99 and Master Drawing List No. 92477, Revision B, dated 1-12-99 with Optional Flight Director/Steering Horizon or later FAA Approved revisions of the above data (14 Volt System). Also eligible on the above models when modified per STC SA1705WE (internal tip tanks) and/or STC SA1435WE (Robertson STOL Conversion) (floatplane or amphibian configuration). (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. vintion Administation. Date of Application: 6-08-88 Date Reissued: Date of Issuance: 6-16-88 Date Amended: 1-15-99, Revision 1 By Direction of the Administrator FEDERAL AVIATION (Signature) POMINSTRATIO 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: SA7181SW-D, Revision 1 Limitations and Conditions: (con't.) 2. Also eligible on the above models when modified per STC SA649NW (gross weight increase), STC SA09132SC (engine conversion), STC SA09030SC (Hartzell propeller), STC SA1603SO (speed kit), STC SA1705WE (internal tip tanks) and STC SA1435WE (Robertson STOL) or any combination of the above (landplane). FAA Approved Supplemental Flight Manual, P/N 89788, dated 6-16-88 is required for Cessna Models 180, 180A, 180B, 180C, 180D, 180E, and 180F and the above models when modified per STC SA1705WE (Internal Tip Tanks) and/or STC SA1435WE (Robertson STOL Conversion) (Landplane, Floatplane or Amphibian) or later FAA Approved revisions of the above supplement. 4. FAA Approved Supplemental Flight Manual, P/N 89789, dated 6-16-88 is required for Cessna Models 180G, 180H, 180J, and 180K, S/N 18053000 and Below and the above models when modified per STC SA1705WE (Internal Tip Tanks) and/or STC SA1435WE (Robertson STOL Conversion) (Landplane, Floatplane or Amphibian) or later FAA Approved revisions of the above supplement. FAA Approved Supplement to Pilot's Operating Handbook and/or Airplane Flight Manual, P/N 89790, dated 6-16-88 is required for Cessna Model 180K, S/N 18053001 and On and the above model when modified per STC SA1705WE (Internal Tip Tanks) and/or STC SA1435WE (Robertson STOL Conversion) (Landplane, Floatplane or Amphibian) or later FAA Approved revisions of the above supplement. FAA/DAS Approved Supplemental Flight Manual, P/N 89788, Revision 1, dated 1-15-99 is required for 1. Cessna models 180, 180A, 180B, 180C, 180D, 180E, and 180F (floatplane or amphibian) and the above models when modified per STC SA1705WE (internal tip tanks) and/or STC SA1435WE (Robertson STOL) 2. Cessna models 180, 180A, 180B, 180C, 180D, 180E, and 180F (landplane) and the above models when modified per STC SA649NW (gross weight increase), STC SA09132SC (engine conversion), STC SA09030SC (Hartzell propeller), STC SA1603SO (speed kit), STC SA1705WE (internal tip tanks), and STC SA1435WE (Robertson STOL) or any combination of the above, WITHOUT TRIM or later FAA Approved revisions of the above supplement. FAA/DAS Approved Supplemental Flight Manual, P/N 89789, Revision 1, dated 1-15-99 is required for 1. Cessna models 180G, 180H, 180J; and 180K, S/N 18053000 and below (floatplane or amphibian) and the above models when modified per STC SA1705WE (internal tip tanks) and/or STC SA1435WE (Robertson STOL) 2. Cessna models 180G, 180H, 180J; and 180K, S/N 18053000 and below (landplane) and the above models when modified per STC SA649NW (gross weight increase), STC SA09132SC (engine conversion), STC SA09030SC (Hartzell propeller), STC SA1603SO (speed kit), STC SA1705WE (internal tip tanks), and STC SA1435WE (Robertson STOL) or any combination of the above, WITHOUT TRIM or later FAA Approved revisions of the above supplement. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA7181SW-D, Revision 1 Limitations and Conditions: (con't.) 8. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 89790, Revision 1, dated 1-15-99 is required for 1. Cessna model 180K, S/N 18053001 and up (floatplane or amphibian) and the above model when modified per STC SA1705WE (internal tip tanks) and/or STC SA1435WE (Robertson STOL) 2. Cessna model 180K, S/N 18053001 and up (landplane) and the above model when modified per STC SA649NW (gross weight increase), STC SA09132SC (engine conversion), STC SA09030SC (Hartzell propeller), STC SA1603SO (speed kit), STC SA1705WE (internal tip tanks), and STC SA1435WE (Robertson STOL) or any combination of the above, WITHOUT TRIM or later FAA Approved revisions of the above supplement. 9. Compatibility of this modification with other previously approved modifications must be determined by the installer. FAA Form 8110-2-1(10-69) Page 3 of 3 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 and street) (City, State, and ZIP code) Exent of Authority (if licensing agreement) : Signature of grantor (In ink) : Page of 2 ## Every issue (1) - January 15, 1999: Amended, Current. [certificate](https://openairdocs.org/files/sha256/a6/a9/a6a9c9700f0544cc778f2e5074530a158ffeb4380d4022ec6c736c52f0bc7ea3) --- 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.