# STC SA09150AC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 40/50 Single and Two Axis Automatic Flight Guidance Systems, Model ST-631-40/50
- Applied: May 1, 1996
- Status date: May 6, 1996
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-765](https://openairdocs.org/tcds/A-765)
- Certificate PDF: https://openairdocs.org/files/sha256/94/70/9470ecdd19bd0e75aa9d65a9ad5abf311f7c3586b421551f76df6dc44cba2baf
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6538C640A07CC19C85256CC1007F39EA.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09150AC-D

## ADs that name it (0)

None.

## Approved models (14)

- Beechcraft Corporation 3N ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Beechcraft Corporation 3NM ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Beechcraft Corporation 3TM ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Beechcraft Corporation C-45G ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Beechcraft Corporation C-45H ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Beechcraft Corporation D18S ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Beechcraft Corporation E18S ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Beechcraft Corporation E18S-9700 ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Beechcraft Corporation G18S ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Beechcraft Corporation H18 ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Beechcraft Corporation JRB-6 ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Beechcraft Corporation TC-45G ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Beechcraft Corporation TC-45H ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Beechcraft Corporation TC-45J ([TCDS A-765](https://openairdocs.org/tcds/A-765))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

*Enicel States al Raerica Department of Transportation Federal Aviation Administration Supplemental Type Certificate SA09150AC-D This certificate issued to: S-TEC Corporation 946 Pegram Mineral Wells, TX 76067 Port 3 of the CIVIl Air Regulations.

Original Product -Type bortificate Number: A -765 Make: Beech Model: 3N, 3NM, 3TM, JRB-6, D18S, E18S, E185-9700, Description of Type Design Change: TC-45J (SNB-5) G18S, H18, C-45G, TC-45G, C-45H, TC-45H, and Installation of S-TEC System 40/50 Single and Two Axis Automatic Flight Guidance Systems, Model ST-631-40/50, according to Bulletin No. 731, dated 4-30-96 and Master Drawing List No. 92924, dated 4-30-96 or later FAA Approved revisions of the above data (28 Volt System).

1. Also eligible on the Above Models When Modified By Hamilton Gross Weight Increase.

2. Also eligible on Models D18S, E185, E185-9/00, G185, H18, C-45G, 10-45G, 0-45H, TC-45H, and TC-45J (SNB-5) When Modified By Volpar Tri-Gear Installation.

(See Continuation Sheet, Page 2, a part of this STC.)

Thomas DAS Staff Coordinator, DAS 5 SW (Title)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09150AC-D Limitations and Conditions: (con't.)

3. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891252, dated 5-06-96 is required for Beech Models 3N, 3NM, 3TM, JRB-6, D18S, E18S, E18S-9700, G18S, H18, C-45G, TC-45G, C-45H, TC-45H, and TC-45J (SNB-5) and These Models When Moditied By Hamilton Gross weight Increase and Models D18S, E18S, E18S-9700, G18S, H18, C-45G, TC-45G, C-45H, TC-45H, and TC-45J (SNB-5) When Modified By Volpar Tri-Gear Installation for S-TEC System 40 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 891253, dated 5-06-96 is required for Beech Models 3N, 3NM, 3TM, JRB-6, D18S, E18S, E185-9700, G18S, H18, C-45G, TC-45G, C-45H, TC-45H, and TC-45J (SNB-5) and These Models When Modified By Hamilton Gross Weight Increase and Models D18S, E18S, E185-9700, G18S, H18, C-45G, TC-45G, C-45H, , TC-45H, and TC-45J (SNB-5) When Modified By Volpar Tri-Gear Installation for S-TEC System 50 or later FAA Approved revisions of the above supplement.

5. Compatibility of this modification with other previously approved modifications must be determined by the installer.

**47 PAGE 2 OF 2 PAGES**

State, and ZIP codel Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- May 6, 1996: Issued, Current. [certificate](https://openairdocs.org/files/sha256/94/70/9470ecdd19bd0e75aa9d65a9ad5abf311f7c3586b421551f76df6dc44cba2baf)

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