# STC ST57CH

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: BF Goodrich Aerospace, United States
- Description: Installation of Sundstrand Mark VI, Ground Proximity Warning System.
- Applied: March 1, 1993
- Status date: May 1, 1996
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A31SO](https://openairdocs.org/tcds/A31SO)
- Certificate PDF: https://openairdocs.org/files/sha256/6b/a8/6ba8cfff0c46dcb13c4cf054c478c1d164e859b983726c4aba7eaedb79d28515
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1AFDFBA1C49FB34285256CC300036097.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST57CH

## ADs that name it (0)

None.

## Approved models (3)

- Embraer S.A. EMB-120 ([TCDS A31SO](https://openairdocs.org/tcds/A31SO))
- Embraer S.A. EMB-120ER ([TCDS A31SO](https://openairdocs.org/tcds/A31SO))
- Embraer S.A. EMB-120RT ([TCDS A31SO](https://openairdocs.org/tcds/A31SO))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

ftrritrd £tatu of ZUnrrica Btpartmtnt of 'Cransportation —.federal atnation administration Supplemental Ttuje Certificate 'LsKwmtW' ST57CH BFGoodrich Aerospace Component Overhaul & Repair, Inc.

817 Dessau Road Austin, Texas 78753-9710 «>i-,/i^^2^-'z:^j?^ 25 -«^£«- Federa 1 Aviation See Type Certificate Data Sheet No. A31SO for complete certification basis.

A3 ISO -. Embraer : EMB-120, EMB-120RT, EMB-120ER 'rMe< :

Installation of Sundstrand Mark VI Ground Proximity Warning System (GPWS) in accordance with Master Drawing List 133-00-0001, Rev. G, dated April 8, 1994, or later FAA approved revision.

— ti*r Compatibility of this design change with previously approved modifications must be determined by the installer.

^/su -us March lf 1993 May 7, 1993 1994 (Signature ) Charles L. Smalley Manager, Systems & Flight Test Branch Chicago Aircra-ffo,jcertiiication office

FA>Po«M 81 10-2(10-481

INSTRUCTIONS : The transfer endorsement below may be used to notify the appropriate FAA Regional Office of the transfer of this Supplemental Type Certificate.

The FAA will reissue the certificate in the name of the transferre and forward It to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number ___ _ _ __ to (9{ame of transferee) (Address of transferee) (yfianier anil street) (City, State, ondZlT axle) from Ctfame. of grantor) ((Print or type) (Address of grantor) CXymber and street) (City, State, anCZIT code) Exent of Authority (if licensing agreement) :

Signature of grantor (In inQ : _ Page 2 of 2

## Every issue (1)

- May 1, 1996: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/6b/a8/6ba8cfff0c46dcb13c4cf054c478c1d164e859b983726c4aba7eaedb79d28515)

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