AirAsia Flight 8501 это былкогда КВС, например, пытается перехватить на себя управление у тянущего "на себя" боковую ручку ВП, но нажимает кнопку перехвата управления на боковой ручке недостаточно долго, что бы она сработала.
Critically, the captain attempted to push the aircraft’s nose down with forward pitch on his side-stick – the proper response to an aerodynamic stall.
But this nose-down input was rendered ineffective because the first officer was continuing to pull rearwards on his side-stick. These opposite actions effectively cancelled one another out, because the Airbus flight-control logic acted on the sum of the two side-stick inputs.
The inquiry determined that the captain did not properly activate the priority mechanism which would have given him exclusive control of the aircraft.
This mechanism required him to push a take-over button for at least 40s, to de-activate the first officer’s side-stick. But although the flight-data recorder showed that this priority button was pushed twice – for 2s and 5s – while the aircraft was stalling, these periods were insufficient to transfer control exclusively to the captain.
Investigators have revealed that the captain of the Indonesia AirAsia Airbus A320 which crashed in the Java Sea last year failed to take decisive control of the aircraft as it stalled.