# STC SA09411AC-D - Type: Supplemental type certificate - Status: Current, Issued - Holder: S-TEC Corporation, United States - Description: Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-865-20/30. - Applied: August 2, 1999 - Status date: August 4, 1999 - Product: Aircraft, Small Airplane - Certification basis: Part 21 - Data sheets: [TCDS 3A16](https://openairdocs.org/tcds/3A16) - Certificate PDF: https://openairdocs.org/files/sha256/e3/77/e377bf7968e96b1f2d3eb905e09805726ebb596465fbac5478e082728bab0120 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D61BD982D1B9970385256CC1007F3AE8.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA09411AC-D ## ADs that name it (0) None. ## Approved models (13) - Beechcraft Corporation 56TC ([TCDS 3A16](https://openairdocs.org/tcds/3A16)) - Beechcraft Corporation 95-55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16)) - Beechcraft Corporation 95-A55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16)) - Beechcraft Corporation 95-B55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16)) - Beechcraft Corporation 95-B55A ([TCDS 3A16](https://openairdocs.org/tcds/3A16)) - Beechcraft Corporation 95-B55B ([TCDS 3A16](https://openairdocs.org/tcds/3A16)) - Beechcraft Corporation 95-C55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16)) - Beechcraft Corporation 95-C55A ([TCDS 3A16](https://openairdocs.org/tcds/3A16)) - Beechcraft Corporation A56TC ([TCDS 3A16](https://openairdocs.org/tcds/3A16)) - Beechcraft Corporation D55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16)) - Beechcraft Corporation D55A ([TCDS 3A16](https://openairdocs.org/tcds/3A16)) - Beechcraft Corporation E55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16)) - Beechcraft Corporation E55A ([TCDS 3A16](https://openairdocs.org/tcds/3A16)) ## 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: SA09411AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Certifies that the change in the type design for the following product with the limitations and conditions therefor as specied hereen meets the aiworthiness requiements of Past 3 of the Eird di Regulations. Original Product F ype Certifente A umber: 3A16 Make: Beech del.- 95-55, 95-A55, 95-B55, 95-B55A, 95-B55B, 95-C55, 95-C55A, D55, D55A, E55, E55A, 56TC, and A56TC Description of Type Design Change: Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-865-20/30, according to Bulletin No. 965, dated 7-30-99 and Master Drawing List No. 921158, dated 7-30-99 or later FAA Approved revisions of the above data (28 Volt System). 1. Only eligible on model 95-B55B when modified per Beech Drawing 96-002000 (Civilian Conversion). (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: 8-02-99 Date Reissued: Date of Issuance: 8-04-99 Date Amended: By Direction of the Administrator FEDERAL AVIATION dalk (Signature) TOMINSTRATO Michael Keirnan DAS Staff Coordinator. DAS 5 SW (Title) or impriso ment not exceeding i years, or both. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09411ACD Limitations and Conditions: (con't.) FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891861, dated 8-04-99 is required for 1. Beech models 95-55, 95-A55, 95-B55, and 95-B55A; 2. Beech model 95-B55B when modified per Beech Drawing 96-002000 (Civilian Conversion) 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 891862, dated 8-04-99 is required for Beech models 95-C55, 95-C55A, D55, D55A, E55, and E55A for S-TEC System 20 or later FAA Approved revisions of the above supplement. 4. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891863, dated 8-04-99 is required for Beech models 56TC and A56TC for S-TEC System 20 or later FAA Approved revisions of the above supplement. 5. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891864, dated 8-04-99 is required for 1. Beech models 95-55, 95-A55, 95-B55, and 95-B55A; 2. Beech model 95-B55B when modified per Beech Drawing 96-002000 (Civilian Conversion) for S-TEC System 30 or later FAA Approved revisions of the above supplement. 6. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891865, dated 8-04-99 is required for Beech models 95-C55, 95-C55A, D55, D55A, E55, and E55A for S-TEC System 30 or later FAA Approved revisions of the above supplement. 7. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891866, dated 8-04-99 is required for Beech models 56TC and A56TC for S-TEC System 30 or later FAA Approved revisions of the above supplement. Compatibility of this modification with other previously approved modifications must be determined by the installer. FAA Form 8110-2-1(10-69) Page 2 of 2 INSTRUCTIONS: The tranafer endorsement below may be used to notify the appropriate FAA Regional Office of the transfer of the Supplemental Type Certificate. The FAA will reissue the certificate in the name of the transferee and forward it to him. TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) _ (Address of transferee) (Number and street) (City, State, and ZIF code) from (Name of grantor) (Print or type) (Address of grantor) (Number & street) (City, State, and ZIP code) Extent of Authority (if licensing agreement): Signature of grantor (In ink) : ## Every issue (1) - August 4, 1999: Issued, Current. [certificate](https://openairdocs.org/files/sha256/e3/77/e377bf7968e96b1f2d3eb905e09805726ebb596465fbac5478e082728bab0120) --- 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.