# STC SA5388SW-D - Type: Supplemental type certificate - Status: Current, Amended - Holder: S-TEC Corporation, United States - Description: Installation of S-TEC System 40/50, single and two axis automatic flight guidance systems, Model ST-272-40/50. - Applied: March 13, 1985 - Status date: April 18, 2002 - Product: Aircraft, Small Airplane - Certification basis: Part 21 - Data sheets: [TCDS A-806](https://openairdocs.org/tcds/A-806) - Certificate PDF: https://openairdocs.org/files/sha256/e0/fc/e0fc5d31a41aaa341e58bdd78e4642a131edcf70296bc4d4360e310652805c2c - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A1F87459754A42DD85256CC2001228C9.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA5388SW-D ## ADs that name it (0) None. ## Approved models (1) - Viking Air Limited DHC-2 Mk.I ([TCDS A-806](https://openairdocs.org/tcds/A-806)) ## 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: SA5388SW-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 Civil d in Regulations. Original Product I ype Certificate Number: A-806 Make: deHavilland Model: DHC-2 Mk. I Description of Type Design Change: Installation of S-TEC System 40/50, Single and Two Axis Automatic Flight Guidance Systems, Model S1-272-40/50, according to Bulletin No. 372, Revision 4, dated 4-18-02 and Master Drawing List No. 92319, Revision D, dated 4-18-02 with Yaw Trim System or later FAA Approved revisions of the above data (28 Volt System). (See Continuation Sheet, Page 2, 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: 3-13-85 Date Reissued: Date of Issuance: 3-25-85 Date Amended: 4-25-85, 10-18-91, 4-18-02 By Direction of the Administrator FEDERAL AVIATION (Signature) TOMNISTRATO Michael Keiran DAS Staff Coordinator, DAS 5 SW (Title) United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA5388SW-D Limitations and Conditions: (con't.) 1. Eligibility limited to deHavilland model DHC-2 Mk. I in landplane, floatplane or amphibian configurations. Yaw Trim System eligibility limited to deHavilland model DHC-2 Mk. I in floatplane or amphibian configurations. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89597, dated 3-25-85 for DeHavilland DHC-2 MK. I (Beaver) is required for S-TEC System 40 and/or later FAA Approved revisions of the above supplement. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89597-1, dated 4-25-85 for DeHavilland DHC-2 MK. _ (Beaver) (Landplane or Float/Amphibian Configuration) is required for S-TEC System 40 and/or later FAA Approved revisions of the above supplement. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89598, dated 3-25-85 for DeHavilland DHC-2 MK. I (Beaver) is required for S-TEC System 50 and/or later FAA Approved revisions of the above supplement. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89598-1, dated 4-25-85 for deHavilland DHC-2 MK. I (Beaver) (Landplane or Float/Amphibian Configuration) is required for S-TEC System 50 and/or later FAA Approved revisions of the above supplement. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89948S, dated 10-18-91 for DeHavilland Model DHC-2 MK. I, Floatplane or Amphibian Configurations is required for S-TEC System 50 with Optional Yaw Trim System and/or later FAA Approved revisions of the above supplement. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 89597, dated 4-18-02, Revision 2, is required for deHavilland model DHC 2, Mk. I landplane S-TEC System 40 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 892122S, dated 4-18-02, is required for deHavilland model DHC-2 Mk. I floatplane or amphibian configurations S-TEC System 40 with Yaw Trim System 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: SA53885W-D Limitations and Conditions: (con't.) ıł. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 899485, dated 4-18-02, Revision 1, is required for deHavilland model DHC-2 Mk. I floatplane or amphibian configurations S-TEC System 50 with Yaw Trim System or later FAA Approved revisions of the above supplement. Compatibility of the 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 ) Extent of Authority (if licensing agreement): Signature of grantor (In ink):. ## Every issue (1) - April 18, 2002: Amended, Current. [certificate](https://openairdocs.org/files/sha256/e0/fc/e0fc5d31a41aaa341e58bdd78e4642a131edcf70296bc4d4360e310652805c2c) --- 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.