# STC SA5318SW-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-243-40/50 - Applied: May 4, 1984 - Status date: May 10, 1984 - Product: Aircraft, Single-Engine - Certification basis: Part 21 - Data sheets: [TCDS A20CE](https://openairdocs.org/tcds/A20CE) - Certificate PDF: https://openairdocs.org/files/sha256/a2/f2/a2f250f6bd85d2b9e19f3bed79cceeba05a434a67a24a125ff4e9a6ccbe99d95 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6C3A7B8EB1CA7C6085256CC200122857.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA5318SW-D ## ADs that name it (0) None. ## Approved models (1) - Cessna Aircraft Company 177RG ([TCDS A20CE](https://openairdocs.org/tcds/A20CE)) ## 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. £oas Bcpartment of transportation— jftdtral Stoiation administration Supplemental ¥gpe Certificate fir*a*'rva& *Jr«XLt£c£ SA5318SW-D S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, TX 76067 .^^ 23 Federal Aviation A20CE CESSNA 177RG ^Mf .' Installation of S-TEC System 40/50 Single and Two Axis Automatic Flight Guidance Systems, Model ST-243-40/50, according to Bulletin No. 343, dated 5-01-84 and Master Drawing List No. 92275, dated 5-01-84 and/or later FAA Approved revisions of the above data, (14 Volt System). 1. FAA Approved Supplemental Flight Manual, P/N 89449, dated 5-10-84 is required for Cessna Model 177RG S/N 177RG0787 and below for S-TEC System 40, and/or later FAA Approved revisions of the above supplement. (See Continuation Sheet, Page 2, a part of this STC). rrv,^^ £Xctmvni&£pa/&p-jd^ln* 5-4-84 5-10-84 (Signature) Harold W. Holdeman DAS Staff Coordinator, DAS 5 SW___ This certificate may bt transferrtd in accordance with FAR 21.47. Unitri Skua «f 3atrica Bepartmrnt of Transportation— fetal aoianon administration Supplemental t^pc Certificate(Continuation Sheet) SA5318SW-D Limitations and Conditions (con't) 2 FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89450, dated 5-10-84 is required for Cessna Model 177RG, S/N 177RG0788 through S/N 177RG1266 for S-TEC System 40, and/ or later FAA Approved revisions of the above supplement. 3 FAA Approved Supplemental Flight Manual, P/N 89454, dated 5-10-84 is required for Cessna Model 177RG, S/N 177RG S/N 177RG0787 and below for S-TEC System 50, and/or later FAA Approved revisions of the above supplement. 4 FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89455, dated 5-10-84 is required for Cessna Model 177RG, S/N 177RG0788 through S/N 177RG1266 for S-TEC System 50 and/or later FAA Approved revisions of the above supplement. 5. Compatability of this modification with other previously approved modifications must be determined by the installer. FAA FORM B1IO-2-1 (10-69) This ctrtifcatt may be transferrid in accordance with FAR 21.17. TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and £IP code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and Z.1P code) Extent of Authority (if licensing agreement): Signature of grantor (In ink): ## Every issue (1) - May 10, 1984: Issued, Current. [certificate](https://openairdocs.org/files/sha256/a2/f2/a2f250f6bd85d2b9e19f3bed79cceeba05a434a67a24a125ff4e9a6ccbe99d95) --- 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.