# STC SA7224SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC system 60 pitch stabilization system, Model ST-326.
- Applied: July 6, 1990
- Status date: July 23, 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/ae/5c/ae5c42cc974a80242552c27ae9840d3308fd2f8ba4416ebaf614226c5fdfcead
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8CE673AB396D0FC085256CC20056A225.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA7224SW-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.

ttrftri rf 2Umta Btpartmtnt of Transportation — jfttoal atriation administration Supplemental 'Cgpc Certificate SA7224SW-D S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, Texas 76067iy4^^&• & V * ff f Civil Air 6A1 Gulfstream Aerospace -500, 500-A, 500-B, 500-S & 500-U (Aero Commander) Installation of S-TEC System 60 Pitch Stabilization System, Model ST-326, according to Bulletin No. 426, dated 7-05-90 and Master Drawing List No. 92519, dated 7-05-90 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/DAS Approved Airplane Flight Manual Supplement, P/N 89889, dated 7-23-90 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.XSee Continuation Sheet, Page 2, a oart of this STC).

Syf/miniA 7-Q6-90 7-23-90 (Signature) Harold W. Holdeman DAS Staff Coordinator, DAS5 SW (Title) fine of not exceeding 1 1,000, or imprisonment not exceeding 3 years, or This ttrtijicate may be traniferrtd in atnrjanu witfi FAR 21.17.

»AA NMM JI10-7 (10-«l)

Unitrd £tatts of Bepartment of transportation— federal Station administration upplemental t:gpe Certificate(Continuation Sheet) SA7224SW-D Limitations and Conditions (con't.)

3. FAA/DAS Approved Airplane Flight Manual Supplement, P/N 89890, dated 7-23-90 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.

4. Compatabil ity of this modification with other previously approved modifications must be determined by the installer.

alteration of thn certificate is punishable by a fine oj nol exceeding 11,000, or imprisonment not exceeding 3 years, or hnlh.

FORM 8110-z-i (io-«») This eerlificali may bi Iransferrtd in accordance with I'.-\K '.'/•>' PAGE 2 OF 2 PAGES

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 (9^ame of transferee) (Address of transferee) _ (9{ym6a- and street) (City, State, andZlT cade) from (9{ame of grantor) ('Print or type) _ (Address of grantor) (y^anier and street) (City, State, andZI'P cade) Exent of Authority (if licensing agreement) :

Signature of grantor (In inQ : __ ___ Page 2 of 2

## Every issue (1)

- July 23, 1990: Issued, Current. [certificate](https://openairdocs.org/files/sha256/ae/5c/ae5c42cc974a80242552c27ae9840d3308fd2f8ba4416ebaf614226c5fdfcead)

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