# STC SA09218AC-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-661, - Applied: April 16, 1997 - Status date: March 19, 2002 - Product: Aircraft, Small Multi-Engine - Certification basis: Part 21 - Data sheets: [TCDS A17SO](https://openairdocs.org/tcds/A17SO) - Certificate PDF: https://openairdocs.org/files/sha256/1c/46/1c4693a5ea196be2cfa4bb6a3c20890b5e8fb9cdf8ba0e9721dbb700e70447a3 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/63FE8CCEA20CB56B85256CC1007F3A1F.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA09218AC-D ## ADs that name it (0) None. ## Approved models (1) - SOCATA - Groupe Aerospatiale GA-7 ([TCDS A17SO](https://openairdocs.org/tcds/A17SO)) ## 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: SA09218AC-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 spocified horon meets the aircorthines requiements of 9 ast 23 of the Feload I viation Regulations. Original Product Type Certifiente Number: A17SO Make: Grumman American Model: GA-7 Description of Type Design Change: Installation of S-TEC System 55/55X Two Axis Automatic Flight Guidance System, Model ST-661, according to Bulletin No. 761, Revision 2, dated 3-19-02 and Master Drawing List No. 92986, Revision B, dated 3-19-02 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: 4-16-97 Late weisseed: Date of Issuance: 5-19-97 Date Amended: 3-19-02 By Direction of the Administrator FEDERAL AVIATION (Signature) TOMINSTRATIO DAS Staff Coordinator, DAS 5 SW Michael Keiran (Title) This certificate may be transferred in accordance with FAR 21-47. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09218ACD Limitations and Conditions: (con't.) FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891353, dated 5-19-97 is required for Grumman American Model GA-7 or later FAA Approved revisions of the above supplement. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891353, Revision 1, dated 3-19-02 is required for Grumman American model GA-7 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. Anited States D1 America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA09218 AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 I art 23 of the I ederal I viation Regulations. Original Product Type Certificate Number: A17SO Make: Grumman American Model: GA-7 Description of Type Design Change: Installation of S-TEC System 55 Two Axis Automatic Flight Guidance System, Model ST-661, with Optional Autotrim System, according to Bulletin No. 761, dated 4-15-97 and Master Drawing List No. 92986, dated 4-15-97 with Optional Flight Director/Steering Horizon or later FAA Approved revisions of the above data (14 Volt System). FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891353, dated 5-19-97 is required for Grumman American Model GA-7 or later FAA Approved revisions of the above supplement. 2. Compatibility of this modification with other previously approved modifications must be determined by the installer. Date of Application: 4-16-97 Date Reissued: Dale of isnance: 5-19-97 Date Amended: FEDERAL AVIATION TOMINISTRATON DAS Staff Coordinator, DAS 5 SW William J. Thomas (Title) of not exceeding $1,000, or imprisonment not exceeding 3 years, or both. FAA Form 8110-2(10-68) Ificate may be transferred in accordance with FAR 21.47. TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (CitY, State, and ZIP endel 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) - March 19, 2002: Amended, Current. [certificate](https://openairdocs.org/files/sha256/1c/46/1c4693a5ea196be2cfa4bb6a3c20890b5e8fb9cdf8ba0e9721dbb700e70447a3) --- 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.