# STC SA09372AC-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-827-20/30.
- Applied: June 9, 1998
- Status date: June 11, 1998
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A15](https://openairdocs.org/tcds/3A15)
- Certificate PDF: https://openairdocs.org/files/sha256/95/fa/95fa9ca13c1acc0d7e4cda358e737a00b75638684bc5057da3b142df9b9235bc
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/842A48BD440EAC2485256CC1007F3AC3.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09372AC-D

## ADs that name it (0)

None.

## Approved models (2)

- Beechcraft Corporation 35-C33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation F33C ([TCDS 3A15](https://openairdocs.org/tcds/3A15))

## 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: SA09372AC-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 folowing fredact with the lanitations and conditions therefer as spreijied hereen meets the accothiness requiements of Fart 3 of the Crit shir hegulations.

Original Product I ype Celipeate A umber: ЗА15 Make: Beech Model: 35-C33 and F33C Description of Type Design Change:

Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems. Model ST-827-20/30, according to Bulletin No. 927, dated 6-08-98 and Master Drawing List No. 921100.

dated 6-08-98 or later FAA Approved revisions of the above data (28 Volt System).

Also Eligible on Model 35-C33 When Modified Per STC SA686CE.

(See 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, revcked or a termination date i etherse established by the Administrator of the F ederat-s viation Administration.

Date of Application: 6-09-98 Date weisned:

Date of Issuance: 6-11-98 Date Amended:

By Direction of the Administrator FEDERAL AVIATION shill K (Signature) TOMINSTRATO Michael Keirnan DAS Staff Coordinator, DAS 5 SW (ritte) Page 1 of 2

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA09372AC-D Limitations and Conditions: (con't.)

2. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement. P/N 891745, dated 6-11-98 is required for Beech Models 35-C33 And This Model When Modified Per STC SA686CE and F33C 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 891746, dated 6-11-98 is required for Beech Models 35-C33 And This Model When Modified Per STC SA686CE and F33C for S-TEC System 30 or later FAA Approved revisions of the above supplement.

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

Is pantlable by a fine of not exceeding S1,000, or imprisonment not exceeding d years, or bota FAA Form 8110-2 (10-68) Fage 2 This certificate may be transferred in acordance with FAR 23.49.

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 11, 1998: Issued, Current. [certificate](https://openairdocs.org/files/sha256/95/fa/95fa9ca13c1acc0d7e4cda358e737a00b75638684bc5057da3b142df9b9235bc)

---
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.