# STC SA09368AC-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-819.
- Applied: May 28, 1998
- Status date: June 1, 1998
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A18CE](https://openairdocs.org/tcds/A18CE)
- Certificate PDF: https://openairdocs.org/files/sha256/c3/0a/c30a397f444282fab51e6a3b345a939a480bd0ee56ccc1df9bd14269af6231b3
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CCC5EB6C0EFC579285256CC1007F3ABD.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09368AC-D

## ADs that name it (0)

None.

## Approved models (3)

- Alexandria Aircraft LLC 17-30A ([TCDS A18CE](https://openairdocs.org/tcds/A18CE))
- Alexandria Aircraft LLC 17-31A ([TCDS A18CE](https://openairdocs.org/tcds/A18CE))
- Alexandria Aircraft LLC 17-31ATC ([TCDS A18CE](https://openairdocs.org/tcds/A18CE))

## 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: SA09368AC-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 specified hereen meets the armorthiness requiements of Past 23 of the Federal A viation Regulations.

Original Product Type Certifcate Aunter: AISCE Al ate : Bellanca Model: 17-30A, 17-31A, and 17-31ATC Description of Type Design Change:

Installation of S-TEC System 30 ALT Altitude Hold System, Model ST-819, according to Bulletin No.

919, dated 5-27-98 and Master Drawing List No. 921095, dated 5-27-98 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 891737, dated 6-01-98 is required for Bellanca Models 17-30A, 17-31A, and 17-31ATC or later FAA Approved revisions of the above supplement.

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

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.

suspended, revoked or a tormination date is othorase established by the st dministrator of the Federal A viation Administration.

Date of Application: 5-28-98 Date Reissued:

Date of Issuance: 6-01-98 Date Amended:

By Direction of the Administrator FEDERAL AVIATION mill le (Signature) TOMINISTRATO Michael Keirnan DAS Staff Coordinator, DAS 5 SW (Title) ble by a fine of not exceeding $1,000, of imprisonment not exe eding 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)

- June 1, 1998: Issued, Current. [certificate](https://openairdocs.org/files/sha256/c3/0a/c30a397f444282fab51e6a3b345a939a480bd0ee56ccc1df9bd14269af6231b3)

---
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.