# STC SA5235SW-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-228
- Applied: September 20, 1983
- Status date: November 4, 1983
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A17](https://openairdocs.org/tcds/3A17)
- Certificate PDF: https://openairdocs.org/files/sha256/65/05/6505c959a00da78fe3656b75ce25be74dfbb01f9db6699defe029dc7c7b6f4ad
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DB4FF9568095C98886257ECB005A076C.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA5235SW-D

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company 172RG ([TCDS 3A17](https://openairdocs.org/tcds/3A17))

## 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: SA5235541-0 This certificate issued to: 1u S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, TX 76067 Part 3 of the CIVIl Air

•Regulations.

Original Product -Type Gertificate Number: 3A17 Make: CESSNA Model: 172RG Description of Type Design Change:

installation of S-TEC Manual Electric Trim System, Model ST-228 according to Bulletin No.328, dated 8-24-83 and Master Drawing List No. 92236, dated ' 8-24-83 and/or later FAA Approved revisions of the above data, (28 Volt System).

1. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89322, dated 11-4-83 is required and/or later FAA Approved revisions of the above supplement.

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

Date of Application: 9-20-83 Date Reissued:

Date of Issuance: 11-4-83 Date Amended:

FEDERA AVIATION By Direction of the Administrator (Signature) DHINISTRATIOR Harold W. Holdeman DAS Staff Coordinator, DAS 5 SW (Tille)

47.

**FAR FORM 8110-2 (10-68)**

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 and street) (City, State, and ZIP code) Extent of Authority (if licensing agreement):

Date of Transfer: _ Signature of grantor (In ink):

## Every issue (1)

- November 4, 1983: Issued, Current. [certificate](https://openairdocs.org/files/sha256/65/05/6505c959a00da78fe3656b75ce25be74dfbb01f9db6699defe029dc7c7b6f4ad)

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