NTSB Recommends ATR Stick Pusher Revision for Ice Conditions

The National Transportation Safety Board, identified by reference number CEN09MA142 and recommendation identifier A-12-026, has formally directed the European Aviation Safety Agency to require Avions de Transport Régional to revise the stick pusher activation angle of attack on ATR 42-series airplanes. This regulatory action aims to ensure that the stick pusher activates before the stall angle of attack occurs when airframe ice accretions are present. The recommendation addresses critical safety concerns related to aircraft performance in icing conditions, seeking to prevent potential stalls by adjusting the activation parameters of the stick pusher system.