Avcon Industries Gains FAA Approval to Replace Halon Fire Extinguishers on LearjetsBusiness PenAugust 22, 2025 August 22, 2025 [stock_market_widget type=”card” template=”basic2″ assets=”BUKS” realtime=”true” api=”yahoo-finance”] Avcon Industries, a subsidiary of Butler National Corporation (OTCQX: BUKS), has achieved a significant milestone with the Federal Aviation...