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: 9

STC Holder: Chadwick, Inc 4375 S.W. 142nd Avenue, Beaverton, OR 97005, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SH142WE	Status: Historical	App Date:	Rev Date: 03/20/1972
Description: Installation of electronic weighing system c-40.
TC Nos.: 1H11
Models: Sikorsky Aircraft CorporationS-58A, S-58B, S-58BT, S-58C, S-58D, S-58DT, S-58E, S-58ET, S-58F, S-58G, S-58H, S-58J
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Chadwick, Inc 11969 SW. Herman Road, Sherwood, OR 97140, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SH1452NM	Status: Historical	App Date:	Rev Date: 07/01/1984
Description: Installation of electronic weighing system.
TC Nos.: H3WE
Models: MD Helicopter Inc.369 (Army YOH-6A)
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Chadwick, Inc 4375 S.W. 142nd Avenue, Beaverton, OR 97005, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SH148WE	Status: Historical	App Date:	Rev Date: 05/26/1972
Description: Installation of Chadwick electronic weighing system C-45.
TC Nos.: H2SW
Models: Bell Helicopter Textron (Canada)206A, 206B
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Chadwick, Inc 4375 S.W. 142nd Avenue, Beaverton, OR 97005, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SH149WE	Status: Historical	App Date:	Rev Date: 06/01/1972
Description: Installation of Chadwick electronic weighing system C47.
TC Nos.: H1SW
Models: Bell Helicopter Textron204B, 205A, 205A-1
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Chadwick, Inc 4375 S.W. 142nd Avenue, Beaverton, OR 97005, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SH150WE	Status: Historical	App Date:	Rev Date: 06/01/1972
Description: Installation of Chadwick electronic weighing system C-46.
TC Nos.: 1H4
Models: Sikorsky Aircraft CorporationS-55, S-55C
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Chadwick, Inc 4375 S.W. 142nd Avenue, Beaverton, OR 97005, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SH151WE	Status: Historical	App Date:	Rev Date: 06/26/1972
Description: Installation of Chadwick electronic weighing system C-43.
TC Nos.: 1H15
Models: Sikorsky Aircraft CorporationS-61L, S-61N
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Chadwick, Inc 4375 S.W. 142nd Avenue, Beaverton, OR 97005, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SH17NW	Status: Historical	App Date:	Rev Date: 02/16/1973
Description: Installation of Chadwick Electronic weighing system C-47.
TC Nos.: H4SW
Models: Bell Helicopter Textron212
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Chadwick, Inc 4375 S.W. 142nd Avenue, Beaverton, OR 97005, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SH61NW	Status: Historical	App Date:	Rev Date: 05/05/1976
Description: Installation of electric weighing system.
TC Nos.: H1IN
Models: Eurocopter FranceSA.315B Alouette III
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Chadwick, Inc 4375 S.W. 142nd Avenue, Beaverton, OR 97005, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SH71NW	Status: Historical	App Date:	Rev Date: 11/07/1975
Description: Installation of electric weighing system.
TC Nos.: H1IN
Models: Eurocopter FranceSA.316B Alouette III, SA.319B Alouette III, SE.3160 Alouette III
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500