# STC SA09363AC-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-817
- Applied: May 6, 1998
- Status date: May 8, 1998
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A1EA](https://openairdocs.org/tcds/A1EA)
- Certificate PDF: https://openairdocs.org/files/sha256/a9/e9/a9e93111f895980165f136d4759e51c8fff9e4329483ececed0dd564d7d3ae56
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/701FFBC9BA3782F685256CC1007F3AB7.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09363AC-D

## ADs that name it (0)

None.

## Approved models (2)

- Piper Aircraft Inc. PA-30 ([TCDS A1EA](https://openairdocs.org/tcds/A1EA))
- Piper Aircraft Inc. PA-39 ([TCDS A1EA](https://openairdocs.org/tcds/A1EA))

## 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: SA09363AC-D This certificate 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 speciped hercen meets the airothiness requiements of Part 3 of the Civd A in Regulations.

Original Product I ype Certifcate A umber: AIEA Make: Piper Model: PA-30 and PA-39 Description of Type Design Change:

Installation of S-TEC System 30 ALT Altitude Hold System, Model ST-817, according to Bulletin No. 917, dated 5-05-98 and Master Drawing List No. 921092, dated 5-05-98 or later FAA Approved revisions of the above data (14 Volt System).

Also Eligible on The Above Models When Modified Per STC SA727SW (Tip Tanks).

(Sce 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.

Date of Application: 5-06-98 Date Reissued:

Date of Issuance: 5-08-98 Date Amended:

By Direction of the Administrator FEDERAL AVIATION shilal il (Signature) TOMINISTRATIO Michael Keiran DAS Staff Coordinator, DAS 5 SW (Title) Is punishable by a fine of not e? ding $1,000, or exceeding 3 years, or both.

with FAR 21.47.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA09363 AC-D Limitations and Conditions: (con't.)

2. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891726, dated 5-08-98 is required for Piper Models PA-30 and PA-39 And The Above Models When Modified Per STC SA727SW (Tip Tanks) or later FAA Approved revisions of the above supplement.

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

or imprisonment not exceeding 3 years, or both.

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)

- May 8, 1998: Issued, Current. [certificate](https://openairdocs.org/files/sha256/a9/e9/a9e93111f895980165f136d4759e51c8fff9e4329483ececed0dd564d7d3ae56)

---
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.