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: 3

STC Holder: Shannon Engineering 7675 Perimeter Road South Suite 200, Seattle, WA 98108, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA4333NM	Status: Current	App Date: 06/03/1988	Rev Date: 07/05/1988
Description: This STC approves the use of the King KFC200 Flight Control System with the Pratt and Whitney PT6-135 Turbine engines installed on the Cessna 421C Registraion Number N44CG, Serial Number 421C-0110.
TC Nos.: A7CE
Models: Cessna Aircraft Company421C
ACO: AIR-770: West Certification Branch SEA

STC Holder: Shannon Engineering 7675 Perimeter Road South Suite 200, Seattle, WA 98108, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA4782NM	Status: Current	App Date: 01/06/1989	Rev Date: 11/02/1989
Description: Installation of engine hush kits. (707-300B ADVANCED)
TC Nos.: 4A26
Models: The Boeing Company707-300B Series, 707-300C Series
ACO: AIR-770: West Certification Branch SEA

STC Holder: Shannon Engineering 7675 Perimeter Road South Suite 200, Seattle, WA 98108, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA5670NM	Status: Current	App Date: 09/23/1991	Rev Date: 03/31/1992
Description: Installation of a 25-degree landing flap warning select switch.
TC Nos.: 4A25
Models: McDonnell Douglas CorporationDC-8-61
ACO: AIR-770: West Certification Branch SEA