# STC ST105CH

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: BF Goodrich Aerospace, United States
- Description: Installation of a Sundstrand Mark VI ground proximity warning system (GPWS) Mark VI.
- Applied: August 16, 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/a9/73/a973e8f4de4078be27d900ce821972f8ed6b01358b9d289b98ec7a13c5b9f002
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/43BBAAC794D5857485256CC300035F19.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/ST105CH

## ADs that name it (0)

None.

## Approved models (3)

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

ilrattd £tata of Amenta Btpartmtnt of i:ransportation—.federal aviation administration Supplemental "Cgpe Certificate <_/iivm<v€w ST105CH BFGoodrich Aerospace Component Overhaul & Repair, Inc.

817 Dessau Road Austin, Texas 78753-9710 '<$C^^^-<j!^;i?^/^ -'y4<«^&«!!£'£«»<«<>^'»^^ 25 Wx^Cs- Federal Aviation See Type Certificate Data Sheet No. A31SO for complete certfication basj.s.

~ : A3 ISO Embraer EMB-120, EMB-120RT, EMB-120ER Installation of Sundstrand Mark VI Ground Proximity Warning System (GPWS) in accordance with Engineering Order BFG-EMB120-021 , Rev. A, dated August 16, 1993, or later FAA approved revision.

1. Compatibility of this design change with previously approved modifications must be determined by the installer.

2. STC ST57CH is required to be installed previously or in conjunction with this installation.

3. FAA Approved Flight Manual Supplement dated June 29, 1995, or later FAA Approved revision is required.

(Signature ) Charles L. Smalley Manager, Systems & Flight Test Branch Chicago A ircr^-^Jrt, ^Certification 0~f f icev_iij-oay >_> f\ J..L »-;j. cyjj ^f iv^tii. i_ j. j. xi_a L. j.uii v_;j /4n> alteration of this certificate is punishable by a fine of not exceeding II ,000, or imprisonment not exceeding 3 years, or both.

FAA Ft»M 8110-3(10-68)

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&ne of transferee) (Address of transferee) (9^an6er atvf street) (City, State, amfZlf cade) e of grantor) ('Print or type) _ (Address of grantor) _ (y^um6er and street) (City, State, tuviZlf code) Exent of Authority (if licensing agreement) :

Signature of grantor (In Page 2 of 2

## Every issue (1)

- May 1, 1996: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/a9/73/a973e8f4de4078be27d900ce821972f8ed6b01358b9d289b98ec7a13c5b9f002)

---
From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.