# STC SA8400SW-D - Type: Supplemental type certificate - Status: Current, Amended - Holder: S-TEC Corporation, United States - Description: Installation of S-TEC System 55/55X Two Axis Automatic Flight Guidance System, Model ST-546 - Applied: July 15, 1994 - Status date: August 23, 2001 - Product: Aircraft, Single-Engine - Certification basis: Part 21 - Data sheets: [TCDS A51EU](https://openairdocs.org/tcds/A51EU) - Certificate PDF: https://openairdocs.org/files/sha256/42/39/423920cd66768e2e726cb63839fd505168bfbab35ad3f90f767e2cdd16482a14 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5BB9FB8FD77DBA5385256CC20058E790.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA8400SW-D ## ADs that name it (0) None. ## Approved models (5) - SOCATA - Groupe Aerospatiale TB10 ([TCDS A51EU](https://openairdocs.org/tcds/A51EU)) - SOCATA - Groupe Aerospatiale TB20 ([TCDS A51EU](https://openairdocs.org/tcds/A51EU)) - SOCATA - Groupe Aerospatiale TB200 ([TCDS A51EU](https://openairdocs.org/tcds/A51EU)) - SOCATA - Groupe Aerospatiale TB21 ([TCDS A51EU](https://openairdocs.org/tcds/A51EU)) - SOCATA - Groupe Aerospatiale TB9 ([TCDS A51EU](https://openairdocs.org/tcds/A51EU)) ## 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: SA8400SW-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Part 23 of the Federal it riation Regulutions. Original Product I ype Certificate Number: AS1EU Make: Socata Model: TB 9, TB 10, TB 20, TB 21, and TB 200 (Groupe Aerospatiale) Description of Type Design Change: Installation of S-TEC System 55/55X Two Axis Automatic Flight Guidance System, Model ST-546, according to Bulletin No. 646, Revision 3, dated 8-23-01 and Master Drawing List No. 92695, Revision C, dated 8-23-01 or later FAA Approved revisions of the above data (14 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: 7-15-94 Date Reissued: Dale of ismance: 7-25-94 Lute umended: 1-13-99, 8-23-01 By Direction of the Administrator FEDERAL AVIATION там (Signature) * TOMINSTRATIO Michael Keirnan DAS Staff Coordinator, DAS 5 SW (Title) PAA Form 8110-2(10-68) Page 1 of 2 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA8400SW-D Limitations and Conditions: (con't.) Optional Autotrim System not eligible on Socata Model TB 10 (Groupe Aerospatiale). 2 Optional Autotrim System not eligible on models TB 9 and TB 200 (Groupe Aerospatiale). FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891083, dated 7-25-94 is required for Socata model TB 10 (Groupe Aerospatiale) or later FAA Approved revisions of the above supplement. 4. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, 891084, dated 7-25-94 is required for Socata models TB 20, and TB 21 (Groupe Aerospatiale) 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 891083, Revision 1, dated 1-13-99 is required for Socata models TB 9, TB 10, and TB 200 (Groupe Aerospatiale) WITHOUT TRIM or later FAA Approved revisions of the above supplement FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891083, Revision 2, dated 8-23-01 is required for Socata models TB 9, TB 10, and TB 200 (Groupe Aerospatiale) WITHOUT TRIM for S-TEC System 55/55X or later FAA Approved revisions of the above supplement. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891084, Revision 1, dated 8-23-01 is required for Socata models TB 20, and TB 21 (Groupe Aerospatiale) for S-TEC System 55/55X 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 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): - Date of Transfer: Signature of grantor (In ink): - **US GONNA PINS OLEGE ORSE** ## Every issue (1) - August 23, 2001: Amended, Current. [certificate](https://openairdocs.org/files/sha256/42/39/423920cd66768e2e726cb63839fd505168bfbab35ad3f90f767e2cdd16482a14) --- 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.