# STC SA09312AC-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-750
- Applied: November 19, 1997
- Status date: November 21, 1997
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A15](https://openairdocs.org/tcds/3A15)
- Certificate PDF: https://openairdocs.org/files/sha256/90/45/904514cde83fbc5b145499d6a7ed06ae6e4a1927f98b8bb8f730cc9bcae9782d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/144363E7B97D239B85256CC1007F3A7F.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09312AC-D

## ADs that name it (0)

None.

## Approved models (1)

- Beechcraft Corporation V35B ([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: SA09312AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Part 3 of the bird I i Regulations.

Original Product I ype berlificate Number: ЗА15 Make: Beech Model: V35B Description of Type Design Change:

Installation of S-TEC System 30 ALT Altitude Hold System, Model ST-750, according to Bulletin No.

850, dated 11-18-97 and Master Drawing List No. 921051, dated 11-18-97 or later FAA Approved revisions of the above data (28 Volt System).

Also eligible on The Above Model When Modified By STC SA1035WE (Turbocharged Engine).

2. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891601, dated 11-21-97 is required for Beech Model V35B And The Above Model When Modified By STC SA1035WE (Turbocharged Engine) 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.

Date of Application: 11-19-97 Date Reissued:

Date of Issuance: 11-21-97 Date Amended:

By Direction of the Administrator FEDERAL AVIATION Wisen Some TOMINSTRATO William J. Thomas DAS Staff Coordinator, DAS 5 SW (Title)

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)

- November 21, 1997: Issued, Current. [certificate](https://openairdocs.org/files/sha256/90/45/904514cde83fbc5b145499d6a7ed06ae6e4a1927f98b8bb8f730cc9bcae9782d)

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