# STC SA7774SW-D - Type: Supplemental type certificate - Status: Current, Issued - Holder: S-TEC Corporation, United States - Description: Installation of S-TEC System 40/50 single and two axis automatic flight guidance systems, model ST-317-40/50. - Applied: May 18, 1990 - Status date: June 15, 1990 - Product: Aircraft, Small Multi-Engine - Certification basis: Part 21 - Data sheets: [TCDS A6CE](https://openairdocs.org/tcds/A6CE) - Certificate PDF: https://openairdocs.org/files/sha256/b6/9a/b69a1a875d31ae89e3fa19d242b9c48b3f613c842e5fe417ab28c2484044c583 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/ACA8728C26997F7385256CC20056A47B.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA7774SW-D ## ADs that name it (0) None. ## Approved models (12) - The Cessna Aircraft Company 337D ([TCDS A6CE](https://openairdocs.org/tcds/A6CE)) - The Cessna Aircraft Company 337E ([TCDS A6CE](https://openairdocs.org/tcds/A6CE)) - The Cessna Aircraft Company 337F ([TCDS A6CE](https://openairdocs.org/tcds/A6CE)) - The Cessna Aircraft Company 337G ([TCDS A6CE](https://openairdocs.org/tcds/A6CE)) - The Cessna Aircraft Company 337H ([TCDS A6CE](https://openairdocs.org/tcds/A6CE)) - The Cessna Aircraft Company P337H ([TCDS A6CE](https://openairdocs.org/tcds/A6CE)) - The Cessna Aircraft Company T337D ([TCDS A6CE](https://openairdocs.org/tcds/A6CE)) - The Cessna Aircraft Company T337E ([TCDS A6CE](https://openairdocs.org/tcds/A6CE)) - The Cessna Aircraft Company T337F ([TCDS A6CE](https://openairdocs.org/tcds/A6CE)) - The Cessna Aircraft Company T337G ([TCDS A6CE](https://openairdocs.org/tcds/A6CE)) - The Cessna Aircraft Company T337H ([TCDS A6CE](https://openairdocs.org/tcds/A6CE)) - The Cessna Aircraft Company T337H-SP ([TCDS A6CE](https://openairdocs.org/tcds/A6CE)) ## 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. Vatd SSata rf SUrnca Bepartmcnt of 'transportation— .federal Station administration Supplemental t^pc Certificate SA7774SW-D . S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, TX 76067 rfn^ffK- tAatttt- rAanat- tn- fAe fa*ir t/atipn fir £{c ^//ntrt'nn jimrfir/ 'un'/tf fAc ./tmffaffcnA 23 Federal Aviation A6CE Cessna 337D, T337D, 337E, T337E, 337F, T337F, 337G, T337G, 337H, P337H, T337H and T337H-SP Installation of S-TEC System 40/50 Single and Two Axis Automatic Flight Guidance Systems, Model ST-317-40/50, according to Bulletin No. 417, dated 5-15-90 and Master Drawing List No. 92518, dated 5-15-90, and/or later FAA Approved revisions of the above data, (28 Volt System). Also eligible on the above models when modified per STC SA937CE (Norton STOL Craft Conversion). Also eligible on the above models when modified per STC SA1627WE (Robertson STOL Conversion). 5 Continuation Sheet, Page 2, a part of this STC.) 4&J^4a4&'fir-^y^rtt^jiA^//Krnju^iAn.'jfftj:/1un&/* SXe/miru 5-18-90 6-15-90 (Slfnaluri) Harold W. Holdeman DAS Staff Coordinator, DAS 5 SW (Title) Tkit ttrltficalt may kf ttansfmtd in aenretancf with FAR 21.17. fAA taM II IO.1 (10-41) Unittd £atn of 3nchra Bcpartmcnt of Transportation— .federal atrtation administration ^supplemental t^pe Certificate(Continuation £hect) SA7774SW-D Limitations and Conditions (con't.) 3. FAA/DAS Approved Supplemental Flight Manual, P/N 89874, dated 6-15-90 is required for Cessna Models 337D, T337D, 337E, T337E, 337F, T337F, 337G, T337G, 337H, P337H, T337H & T337H-SP And The Above Models When Modified Per STC SA937CE (Horton STOL Craft Conversion) for System 40, and/or later FAA Approved revisions of the above supplement. 4. FAA/DAS Approved Supplemental Flight Manual, P/N 89875, dated 6-15-90 is required for Cessna Models 337D, T337D, 337E, T337E, 337F, T337F, 337G, T337G, 337H, P337H, T337H and T337H-SP When Modified Per STC SA1627WE (Robertson STOL Conversion) for System 40, and/or later FAA Approved revisions of the above supplement. 5. FAA/DAS Approved Supplemental Flight Manual, P/N 89878, dated 6-15-90 is required for Cessna Models 337D, T337D, 337E, T337E, 337F, T337F, 337G, T337G, 337H, P337H, T337H, T337H-SP And The Above Models When Modified Per STC SA937CE (Horton STOL Craft Conversion) for System 50, and/or later FAA Approved revisions of the above supplement. 6. FAA/DAS Approved Supplemental Flight Manual, P/N 89879, dated 6-15-90 is required for Cessna Models 337D, T337D, 337E, T337E, 337F, T337F, 337G, T337G, 337H, P337H, T337H and T337H-SP When Modified Per STC SA1627WE (Robertson STOL Conversion) for System 50, and/or later FAA Approved revisions of the above supplement. 7. Compatability of this modification with other previously approved modifications must be determined by the installer. .I'D a'tte rattan oj this certificate is punishable by a fine oj not exceeding 11,000, or imprisonment not exceeding 3 years, or hnth. FAA FORM 81 io-2-l (l»-«9) This certifuatt may be transferred in accordance with l-'Alt I'/ -I' PAGE 2 OF 2 PAGES to (Name of transferee) (Address of transferee) (Number and street) (Cilv, Slate, anil £IP code) from (Name of grantor) (Print or type) . (Address of grantor) (.Wumhrr and street) ( (:it\l. Slale, and