The STC search system is a complimentary service provided to the aviation community. We hope you find it useful. We do not provide access to STC engineering. For that you need to contact the STC holder directly. Our primary product is a comprehensive library of aviation regulations and standards, including tools for generating Airworthiness Directive compliance reports.

No. of STCs: 5

STC Holder: Avtech Corporation 3400 Wallingford Avenue N, Seattle, WA 98103, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA4532NM	Status: Current	App Date:	Rev Date: 03/02/2001
Description: Installation of Coltech, CTD-80 ATSCALL, enabling company calling of selected aircraft via company selected radio.
TC Nos.: A16WE
Models: The Boeing Company737 Series
ACO: AIR-770: West Certification Branch SEA

STC Holder: Avtech Corporation 3400 Wallingford Avenue N, Seattle, WA 98103, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA5493NM	Status: Current	App Date:	Rev Date: 03/02/2001
Description: Installation of Coltech Selcal per FAA approved Coltech, Inc. document no. 0200017-000 Rev A dtd 11/15/91 or later FAA approved revision.
TC Nos.: A1NM
Models: The Boeing Company767
ACO: AIR-770: West Certification Branch SEA

STC Holder: Avtech Corporation 3400 Wallingford Avenue N, Seattle, WA 98103, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: ST02140SE	Status: Historical	App Date: 11/05/2011	Rev Date: 08/19/2011
Description: Installation of Avtech 9010-1-2 Global Positioning System (GPS) Electronic Clock in accordance with Avtech Master Drawing List (MDL) Document Number 9010-14-2, Revision A, dated February 28, 2011, or later Federal Aviation Administration (FAA) approved revision.
TC Nos.: A1NM
Models: The Boeing Company767-400ER Series
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Avtech Corporation 3400 Wallingford Avenue N, Seattle, WA 98103, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: ST4532NM	Status: Current	App Date:	Rev Date: 03/02/2001
Description: Installation of Coltech CTD-80 ATSCALL, enabling company calling of selected aircraft via company selected radio.
TC Nos.: A16WE
Models: The Boeing Company737, 737 Series, 737-100 Series, 737-200 Series, 737-200C Series, 737-300 Series, 737-400 Series, 737-500 Series, 737-600 Series, 737-700 Series, 737-800 Series, 737-900 Series
ACO: AIR-770: West Certification Branch SEA

STC Holder: Avtech Corporation 3400 Wallingford Avenue N, Seattle, WA 98103, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: ST5493NM	Status: Current	App Date:	Rev Date: 03/02/2001
Description: Installation of Coltech SELCAL.
TC Nos.: A1NM
Models: The Boeing Company767
ACO: AIR-770: West Certification Branch SEA