From Wikipedia:
HEICO Corporation is an American aerospace and electronics company, which manufactures products found in aircraft, spacecraft, defense equipment, medical equipment, and telecommunications systems. Since the mid-1990s, HEICO has been organized into two divisions to address these different markets: Flight Support Group and Electronic Technologies Group.
HEICO's Flight Support Group is the largest independent provider of FAA-approved aircraft replacement parts.[4] It is a provider of aircraft accessories component repair and overhaul services for avionic, electro-mechanical, flight surface, hydraulic and pneumatic applications; commercial aviation and military aviation parts distribut٨ion; and a manufacturer ofother aircraft parts.