# STC SA09366AC-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 axcis automatic flight guidance systems, Model ST-818-20/30.
- Applied: May 20, 1998
- Status date: May 22, 1998
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A18CE](https://openairdocs.org/tcds/A18CE)
- Certificate PDF: https://openairdocs.org/files/sha256/55/66/5566b13fe162d269889c26270ffd72ea6e1b43a51eebd4780660fa1b73f2b5b5
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/85E1270B686DF32E85256CC1007F3ABB.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09366AC-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: SA09366AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 I art 23 of the Federal & viation.

Original Product I ype Certificate Number: AISCE Make: Bellanca Model: 17-30A, 17-31A, 17-31ATC Description of Type Design Change:

Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-818-20/30, according to Bulletin No. 918, dated 5-18-98 and Master Drawing List No. 921094, dated 5-18-98 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 891731, dated 5-22-98 is required for Bellanca Models 17-30A, 17-31A, and 17-31ATC for S-TEC System 20 or later FAA Approved revisions of the above supplement.

(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.

suspended, revoked or a termination date is othernse established by the Administrator of the Federal viation Laminatation.

Date of Application: 5-20-98 Date Reissued:

Date of Issuance: 5-22-98 Date Amended:

By Direction of the Administrator FEDERAL AVIATION mill K (Signature) TOMINSTRATC Michael Keirnan DAS Staff Coordinator, DAS 5 SW (Tule) )

2. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891733, dated 5-22-98 is required for Bellanca Models 17-30A, 17-31A, and 17-31ATC 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 8110-2-1 (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)

- May 22, 1998: Issued, Current. [certificate](https://openairdocs.org/files/sha256/55/66/5566b13fe162d269889c26270ffd72ea6e1b43a51eebd4780660fa1b73f2b5b5)

---
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.