# STC SA09335AC-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-753
- Applied: January 28, 1998
- Status date: January 30, 1998
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A13CE](https://openairdocs.org/tcds/A13CE)
- Certificate PDF: https://openairdocs.org/files/sha256/06/8b/068b2fb08512bf32d5e03767de59c16ee8025eb490deaad4567ff19955e7b142
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E2A4CD8628E4BD4E85256CC1007F3A98.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09335AC-D

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company 177B ([TCDS A13CE](https://openairdocs.org/tcds/A13CE))

## 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: SA09335AC-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 specijed hereon meets the aimothiness requiements of Past 23 of the Federal L viation Kegulations.

Original Product I уро Cerlificate A umber : AI3CE Make: Cessna Al cdel: 177B Description of Type Design Change:

Installation of S-TEC System 30 ALT Altitude Hold System, Model ST-753, according to Bulletin No.

853, dated 1-26-98 and Master Drawing List No. 921069, dated 1-26-98 or later FAA Approved revisions of the above data (28 Volt System).

FAA/DAS Approved Supplemental Flight Manual, P/N 891648, dated 1-30-98 is required for Cessna Model 177B or later FAA Approved revisions of the above supplement.

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

Date of Application: 1-28-98 Date Reissued:

Date of issan 1-30-98 Date Amended:

By Direction of the Administrator FEDERAL AVIATION Ween Domes TOMINISTRATO William J. Thomas DAS Staff Coordinator, DAS 5 SW (Tile) ra fine of not exceeding 51,000, or imprisonment not

The FAR will reissue the certificate in the name of the transferee and forward it to him.

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)

- January 30, 1998: Issued, Current. [certificate](https://openairdocs.org/files/sha256/06/8b/068b2fb08512bf32d5e03767de59c16ee8025eb490deaad4567ff19955e7b142)

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