# STC SA08999AC-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 55/55X Two Axis Automatic Flight Guidance System,Model ST-583
- Applied: April 19, 1995
- Status date: April 12, 2001
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A15](https://openairdocs.org/tcds/3A15)
- Certificate PDF: https://openairdocs.org/files/sha256/6e/b1/6eb163f60ac03cbfbdf660940b775536842a5a8d4de2c5c8c414ca8e682ac585
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D3DCCD92FD5C036186257D0F0063D87F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA08999AC-D

## ADs that name it (0)

None.

## Approved models (12)

- Beechcraft Corporation 35-33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation 35-A33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation 35-B33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation 35-C33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation 35-C33A ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation E33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation E33A ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation E33C ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation F33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation F33A ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation F33C ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation G33 ([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: SA08999 AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Last 3 of the Civil sin Kegulations.

Criginal I reduet I ype Certifente A enter: ЗА15 Al ate : Beech Model: 35-33, 35-А33, 35-B33, 35-С33, 35-C33А, Е33, Е33А, E33C, F33, F33C G33, and F33A Description of Type Design Change:

Installation of S-TEC System 55/55X Two Axis Automatic Flight Guidance System, Model ST-583, according to Bulletin No. 683, Revision 2, dated 4-12-01 and Master Drawing List No. 92763, Revision B, dated 4-12-01 or later FAA Approved revisions of the above data (14 Volt System).

(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.

I ate of respplication : 4-19-95 Date Reissued:

Date of Issuance: 4-27-95 Date Amended: 4-12-01 By Direction of the Administrator FEDERAL AVIATION nikeK (Signature) TOMNISTRATOS Michael Keirnan DAS Staff Coordinator, DAS 5 SW (Title)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA08999 AC-D Limitations and Conditions: (con't.)

Model F33A eligibility limited to S/N CE-315 and below.

2. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891158, dated 4-27-95 is required for Beech Models 35-33, 35-A33, and 35-B33 or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891159, dated 4-27-95 is required for Beech Models 35-C33, 35-C33A, E33, E33A, E33C, F33;

F33A, S/N CE-315 and Below; F33C, and G33 or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891158, Revision 1, dated 4-12-01 is required for Beech models 35-33, 35-A33, and 35-B33 for S-TEC System 55/55X or later FAA Approved revisions of the above supplement.

5. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891159, Revision 1, dated 4-12-01 is required for Beech models 35-C33, 35-C33A, E33, E33A, E33C, F33; F33A, S/N CE-315 and below; F33C, and G33 for S-TEC System 55/55X or later FAA Approved revisions of the above supplement.

6. 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

## Every issue (1)

- April 12, 2001: Amended, Current. [certificate](https://openairdocs.org/files/sha256/6e/b1/6eb163f60ac03cbfbdf660940b775536842a5a8d4de2c5c8c414ca8e682ac585)

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