# STC SA5373SW-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-157.
- Applied: January 16, 1985
- Status date: February 13, 1985
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A17](https://openairdocs.org/tcds/3A17)
- Certificate PDF: https://openairdocs.org/files/sha256/93/a1/93a1a748014b3bb00b18116cee1bcc060be11a15fec4369f326590f393e3d4f2
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/22C749A0EB67696D85256CC2001228B3.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA5373SW-D

## ADs that name it (0)

None.

## Approved models (1)

- Textron Aviation Inc. R172K ([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.

*nited Stares of Bluerica Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number 5A537354-0 This certificate issued to: 1e. S-TEC Corporation Rt, 4, Bldg, 946 Wolters Industrial Complex Mineral Wells, TX 76067 Part 3 of the CIVIl Air Hegulations.

Original Product - Type Certificate Numben: 3A17 Make: CESSNA Model: R172K Description of Type Design Change:

Installation of S-TEC Manual Electric Trim System, Model ST=157, according to Bulletin No, 257, dated 11-30-84 and Master Drawing List No, 92307, dated 11-30-84 is required 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 89572; dated 2-13-85 is required for Cessna Model R172K 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: 1-16-85 Date Reissued:

Date of Issuance: 2-13-85 Date Amended:

FEDERAL AVIATION By Direction of the Administrator TO MINISTRATO DAS Staff Coordinator, DAS 5 SW Harold W. Hoi deman (Title)

47.

PAA:: +1 9110-2 (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):

Signature of grantor (In ink):.

## Every issue (1)

- February 13, 1985: Issued, Current. [certificate](https://openairdocs.org/files/sha256/93/a1/93a1a748014b3bb00b18116cee1bcc060be11a15fec4369f326590f393e3d4f2)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.