The STC search system is a complimentary service provided to the aviation community. We hope you find it useful. Our primary product is a comprehensive library of aviation regulations and standards, including tools for generating Airworthiness Directive compliance reports.

No. of STCs: 2

STC Holder: Mechanical Specialties LLC 1000 85th Ave., SE, Olympia, WA 98501, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SR02493SE	Status: Current	App Date: 02/16/2015	Rev Date: 08/02/2016
Description: Installation of a cargo hook
TC Nos.: H3WE
Models: MD Helicopters Inc.369D, 369E, 369F, 369FF, 500N, 600N
ACO: AIR-770: West Certification Branch SEA

STC Holder: Mechanical Specialties LLC 1000 85th Ave SE, Olympia, WA 98501		If you are an STC Holder, Contact us to have your company added here!
STC No.: SR11869SE	Status: Current	App Date: 02/09/2023	Rev Date: 03/05/2025
Description: Installation of Mechanical Specialties, LLC Human External Cargo (HEC) and non-HEC Hook System
TC Nos.: H2SW
Models: Bell Helicopter Textron Canada Limited407
ACO: AIR-770: West Certification Branch SEA