# STC SA7178SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC manual electric trim system, Model ST-433.
- Applied: May 13, 1988
- Status date: May 18, 1988
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A21](https://openairdocs.org/tcds/3A21)
- Certificate PDF: https://openairdocs.org/files/sha256/9b/b4/9bb417ec24ba2c4cc11b997614280c63ae9f0aaae049585f99d79a5404effc21
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/40ADBA4D83BF900A85256CC20056A1D9.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA7178SW-D

## ADs that name it (0)

None.

## Approved models (2)

- The Cessna Aircraft Company 210K ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- The Cessna Aircraft Company T210K ([TCDS 3A21](https://openairdocs.org/tcds/3A21))

## 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: SA71785N-D This certificate issued to: S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, Texas 76067 Part 3 of the CiVil Air Regulations:

Original Product - Type bertificate Number: 3A21 Make: Cessna Model: 210K and T210K Description of Type Design Change:

Installation of S-TEC Manual Electric Trim System, Model ST-433, according to Bulletin No. 533, dated 5-11-88 and Master Drawing List No. 92474, dated 5-11-88 and/or later FAA Approved revisions of the above data (14 Volt System).

firelations and bonditions Also eligible on Model T210K When Modified Per SIC SAZ689SW (RAM Moditication)

2. FAA Approved Supplemental Flight Manual, P/N 89784, dated 5-18-88 is required and/or later FAA Approved revisions of the above supplement.

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

Holdeman 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 Z1P code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and Z1P code) Exent of Authority (if licensing agreement) :

Signature of grantor (1n ink) : ....

Page of 2

## Every issue (1)

- May 18, 1988: Issued, Current. [certificate](https://openairdocs.org/files/sha256/9b/b4/9bb417ec24ba2c4cc11b997614280c63ae9f0aaae049585f99d79a5404effc21)

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