# STC SA7174SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 60 two axis automatic flight guidance system Model ST-102, with optional autotrim system.
- Applied: March 4, 1988
- Status date: March 30, 1990
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 6A1](https://openairdocs.org/tcds/6A1)
- Certificate PDF: https://openairdocs.org/files/sha256/33/ce/33ce76694732dbed18171f1c40e2005d127df33ecc089c88fe50574627776c99
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/067E96E5BA8C8A3085256CC20056A1D5.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA7174SW-D

## ADs that name it (0)

None.

## Approved models (5)

- Twin Commander Aircraft Corporation 500 ([TCDS 6A1](https://openairdocs.org/tcds/6A1))
- Twin Commander Aircraft Corporation 500-A ([TCDS 6A1](https://openairdocs.org/tcds/6A1))
- Twin Commander Aircraft Corporation 500-B ([TCDS 6A1](https://openairdocs.org/tcds/6A1))
- Twin Commander Aircraft Corporation 500-S ([TCDS 6A1](https://openairdocs.org/tcds/6A1))
- Twin Commander Aircraft Corporation 500-U ([TCDS 6A1](https://openairdocs.org/tcds/6A1))

## 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.

£tarn * arnica Bepartmmt of Transportation— .federal Station administration Supplemental Km Certificate iSUvrrwev SA7174SW-D S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, Texas 76067 *y^t^^ Civil Air 6A1 Gulfstream Aerospace 500, 500-A, 500-B, 500-S & 500-U (Aero Commander) Installation of S-TTC Systern 60 Two Axis Automatic Flight Guidance System, Model ST-102, with Optional Autotrim System, according to Bulletin No. 205, Revision 1, dated 2-26-90 and Master Drawing List No. 92469, Revision A, dated 2-26-90 and/or later FAA Approved revisions of the above data (28 Volt System)-;

1. Also eligible on the above models when modified per STC SA585SW (Extended Nose),

2. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89776, dated 3-11-88 is required for Gulfstream Aerospace Models 500 and 500-A (Aero Commander) and/or later FAA-Approved revisions of the above supplement, j Continuation Sheet, Page 2, a part of this STC.)\-^Jted<^&^^s^ifir*^^jLA^i/l/reTnain'*n'^fce£jtn&e* .&ttru*i^ 3-04-88 3-11-88 3-30-90, Revision 1 Haroldrwf''afl'o'l'deman DAS Staff Coordinator, DAS 5 SW fine of not exceeding $1,000, or imprisonment not exceeding 3 years, or both.

7*Au urlijicate nay te ttarafrnti in otnrdonu with FAR 21.17.

f A* rout II IO-> (10-M)

United £ttttt of amain Bepartmcnt of transportation—federal Nation Administration Ctrtificate(Continuation $heet) tSVM/WlweW SA7174SW-D, Revision 1 Limitations and Conditions (con't.)

3. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89776-1, dated 3-30-90 is required for Gulfstream Aerospace Models 500 and 500-A (Aero Commander) And The Above Models When Modified Per STC SA585SW (Extended Nose) and/or later FAA Approved revisions of the above supplement.

4. FAA Approved Supplement to Pilot's Operating Handbook and/or later FAA Approved Airplane Flight Manual, P/N 89838, dated 3-30-90 is required for Gulfstream Aerospace Models 500-B, 500-S & 500-U (Aero Commander) And The Above Models When Modified Per STC SA585SW (Extended Nose) and/or later FAA Approved revisions of the above supplement.

5. Compatability of this modification with other previously installed modifications must be determined by the installer.

FAA FORM 8110-2-1 (ltt-69) This certificate may be transferred in accordance with PAR i'1.47.

INSTRUCTIONS : The transfer endorsement below may be used to notify the appropriate FAA Regional Office of the transfer of this Supplemental Type Certificate.

The FAA will reissue the certificate In the name of the transferre and forward it to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (9fane of transferee) (Address of transferee) _ CXymber ami street) (City, State, aruCZlf code) of grantor) (Print or type) _ (SUaress of grantor) (y^umfer andstreet) (City, State, andZlf code) Exent of Authority (if licensing agreement) :

Signature of grantor (In infy :

## Every issue (1)

- March 30, 1990: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/33/ce/33ce76694732dbed18171f1c40e2005d127df33ecc089c88fe50574627776c99)

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