# STC SA8401SW-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-547
- Applied: July 16, 1994
- Status date: August 28, 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/c8/2a/c82aa854b0b567ff391996542e6400454e912d08a465db5cf87fa9cca960b9eb
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/02D2F95B3D941E2A85256CC20058E791.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA8401SW-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

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.

i <9f ^meriui Pepartraeitt at tEratwporfarium - <3)|siteral <&£rtatum J^braratsrtralum (Esrttftcate SA8401SW-D S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 A5 1 EU Socata (Groupe Aerospatiale) TB 9, TB 1 0, TB 20, TB 2 1 , and TB 200 Installation of S-TEC System 55/55X Two Axis Automatic Flight Guidance System, Model ST-547, according to Bulletin No. 647, Revision 3, dated 8-28-01, and Master Drawing List No. 92697, Revision C, dated 8-28-01, or later FAA Approved revisions of the above data (28 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.

nt/itc/t /& .- 7-16-94 7-26-94 <?&/* «„„•„</<*/.• 12-15-98,8-28-01 (Signature) Michael Keirnan DAS Staff Coordinator. DAS 5 SW (Title)

FAA Form 8110-2(10-68} Page 1 of 2

i Of America Jcpartmetrt at ^ransportatmn - Jfeheral .Afriaiton ^bmtitistration upplemenial tEgpe Certificate SA8401SW-D Limitations and Conditions (con't.)

1. Optional Autotrim System not eligible on Socata model TB 9, TB 10, and TB 200 (Groupe Aerospatiale).

2. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891085. dated 7-26-94 is required for SOCATA Model TB 10 (Groupe AEROSPATIALE) or later FAA Approved revisions of the above supplement.

3. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891086. dated 7-26-94 is required for SOCATA Models TB 20 and TB 21 (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, P/N 891085, Revision 1, dated 12-15-98 for Socata models TB 9, TB 10, and TB 200 (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 891085. Revision 2, dated 8-28-01 for Socata models TB 9, TB 10, and TB 200 (Groupe Aerospatiale) for S-TEC System 55/55X or later FAA Approved revisions of the above supplement.

6. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891086. Revision 1, dated 8-28-01 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.

7. 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 2JP code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and ^IP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

U.S. GOVERNMENT PRINTING OFFICE : 1966 OF —205-579

## Every issue (1)

- August 28, 2001: Amended, Current. [certificate](https://openairdocs.org/files/sha256/c8/2a/c82aa854b0b567ff391996542e6400454e912d08a465db5cf87fa9cca960b9eb)

---
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.