# STC SA09254AC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-711-20/30.
- Applied: July 2, 1997
- Status date: July 7, 1997
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A13](https://openairdocs.org/tcds/2A13)
- Certificate PDF: https://openairdocs.org/files/sha256/b8/14/b814dbe511278f6ce675dc145d6ae580f9620926c9acef6ebda5d2891166565b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9B8B0B83B9EA9AAA85256CC1007F3A44.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09254AC-D

## ADs that name it (0)

None.

## Approved models (5)

- Piper Aircraft Inc. PA-28-140 ([TCDS 2A13](https://openairdocs.org/tcds/2A13))
- Piper Aircraft Inc. PA-28-150 ([TCDS 2A13](https://openairdocs.org/tcds/2A13))
- Piper Aircraft Inc. PA-28-160 ([TCDS 2A13](https://openairdocs.org/tcds/2A13))
- Piper Aircraft Inc. PA-28-180 ([TCDS 2A13](https://openairdocs.org/tcds/2A13))
- Piper Aircraft Inc. PA-28-235 ([TCDS 2A13](https://openairdocs.org/tcds/2A13))

## 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: SA09254AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Past ast of the Civ A a Regulutions.

Original Product I ype Cerlificate Number: 2A13 Make: Piper Model: PA-28-140, PA-28-150, PA-28-160, PA-28-180, and PA-28-235 Description of Type Design Change:

Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-711-20/30, according to Bulletin No. 811, dated 7-01-97 and Master Drawing List No. 921011, dated 7-01-97 or later FAA Approved revisions of the above data (14 Volt System).

1. Only eligible on Model PA-28-235, S/N 28-10001 Through S/N 28-11378 and S/N 28-7110001 Through S/N 28-7210023.

2. Also eligible on Model PA-28-235, S/N 28-10001 Through S/N 28-11378 and S/N 28-7110001 Through S/N 28-7210023 When Modified Per STC SA2143WE (Robertson STOL).

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

suspended, recoked or a termination date is otherase established by the Adminstrator of the Federal . viation Administration.

Date of Application: 7-02-97 Date Reissued:

Date of Issuance: 7-07-97 Date Amended:

By Direction of the Administrator FEDERAL AVIATION (Signature) TOMINISTRATO William J. Thomas DAS Staff Coordinator, DAS 5 SW (Title)

47.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09254 AC-D Limitations and Conditions: (con't.)

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891448, dated 7-07-97 is required for Piper Models PA-28-140, PA-28-150, PA-28-160; and PA-28-180, S/N 28-1 Through S/N 28-7205318; and PA-28-235, S/N 28-10001 Through S/N 28-11378 and S/N 28-7110001 Through S/N 28-7210023 for S-TEC System 20 or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891449, dated 7-07-97 is required for Piper Model PA-28-180, S/N 28-7305001 And Up for S-TEC System 20 or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891450, dated 7-07-97 is required for Piper Model PA-28-235, S/N 28-10001 Through S/N 28-11378 and S/N 28-7110001 Through S/N 28-7210023 When Modified Per STC SA2143WE (Robertson STOL) for S-TEC System 20 or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891451, dated 7-07-97 is required for Piper Models PA-28-140, PA-28-150, PA-28-160; and PA-28-180, S/N 28-1 Through S/N 28-7205318; and PA-28-235, S/N 28-10001 Through S/N 28-11378 and S/N 28-7110001 Through S/N 28-7210023 for S-TEC System 30 or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891452, dated 7-07-97 is required for Piper Model PA-28-180, S/N 28-7305001 And Up for S-TEC System 30 or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891453, dated 7-07-97 is required for Piper Model PA-28-235, S/N 28-10001 Through S/N 28-11378 and S/N 28-7110001 Through S/N 28-7210023 When Modified Per STC SA2143WE (Robertson STOL) for S-TEC System 30 or later FAA Approved revisions of the above supplement.

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

FAA Form 8110- Icate may be transferred in accordance with FAR 21.47.

The FAA will reissue the certificate in the name of the transferee and forward it to nima

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number_ to (Name of transferee) (Address of transferee) (Number and street) (City, State, and ZIP code) 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)

- July 7, 1997: Issued, Current. [certificate](https://openairdocs.org/files/sha256/b8/14/b814dbe511278f6ce675dc145d6ae580f9620926c9acef6ebda5d2891166565b)

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