Core Points - The Federal Aviation Administration (FAA) has granted Avcon Industries, Inc. and Butler Avionics Inc. a Supplemental Type Certificate (STC) for the installation of non-halon portable fire extinguishers in various Learjet models [1][2] - The new Halotron BrX-filled fire extinguishers are designed for easy retrofit and compliance with European Union Aviation Safety Agency (EASA) requirements, with an application for EASA validation underway [2][4] - Halon, an ozone-depleting substance, has been banned in EU member states since 1994, and regulatory bodies require the replacement of hand-held Halon fire extinguishers in aircraft by December 31, 2025 [3] Company Overview - Butler Avionics, Inc. has been providing avionics integration, installation, and repair services since 1969, working closely with its parent company, Butler National Corporation, and affiliate Avcon Industries, Inc. [5] - Avcon Industries, Inc. specializes in the modification of business and commercial aircraft, focusing on complex structural modifications and system integrations across various sectors, including air ambulance and Intelligence, Surveillance, and Reconnaissance (ISR) [6][7] - Avcon is recognized for its solutions to regulatory-driven aircraft modifications and is a wholly owned subsidiary of Butler National Corporation, which is publicly traded under the ticker symbol OTCQX: BUKS [7]