# STC SA09331AC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 30 ALT Altitude Hold System, Model ST-734.
- Applied: January 20, 1998
- Status date: January 22, 1998
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3SO](https://openairdocs.org/tcds/A3SO)
- Certificate PDF: https://openairdocs.org/files/sha256/e5/91/e591eae4cc0586e4909b534fdb6123e9faab001ef7c42ccd9743370ed800ee54
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3F1309EAB9739B4385256CC1007F3A94.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09331AC-D

## ADs that name it (0)

None.

## Approved models (3)

- Piper Aircraft Inc. PA-32-260 ([TCDS A3SO](https://openairdocs.org/tcds/A3SO))
- Piper Aircraft Inc. PA-32-300 ([TCDS A3SO](https://openairdocs.org/tcds/A3SO))
- Piper Aircraft Inc. PA-32R-300 ([TCDS A3SO](https://openairdocs.org/tcds/A3SO))

## 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: SA09331 AC-D I his Cortifente issued to S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Certifies that the change in the type design for the following product with the limitations and conditions therefor as specifed hereen meets the admothiness requiements of I art 3 of the Cird Li Regulations.

Original Product I ype Certifcate A unter: A3SO Make s Piper Al edel: PA-32-260, PA-32-300, and PA-32R-300 Description of Type Design Change:

Installation of S-TEC System 30 ALT Altitude Hold System, Model ST-734 according to Bulletin No. 834, dated 1-19-98 and Master Drawing List No. 921065, dated 1-19-98 or later FAA Approved revisions of the above data (14 Volt System).

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891644, dated 1-22-98 is required for Piper Models PA-32-260 and PA-32-300 or later FAA Approved revisions of the above supplement.

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

suspended, revoked or a termination date is othernse estublished by the Administrator of the ederal I viation Administration.

Date of Application: 1-20-98 Date Reissued:

Date of Issuance: 1-22-98 Date Amended:

By daection of the Naminshator FEDERAL AVIATION Wiin Shones signature TOMINISTRATOR William J. Thomas DAS Staff Coordinator, DAS 5 SW (Title) TIng 1 years, or both.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09331ACD Limitations and Conditions: (con't.)

2. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891645, dated 1-22-98 is required for Piper Model PA-32R-300 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 8110-2-1 (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 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)

- January 22, 1998: Issued, Current. [certificate](https://openairdocs.org/files/sha256/e5/91/e591eae4cc0586e4909b534fdb6123e9faab001ef7c42ccd9743370ed800ee54)

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