The speed brake surfaces can be controlled with the SPEED BRAKE lever.
To set speedbrake surfaces to a required position, the lever has to be pushed down and set to the required position.
A detent is provided at "½" SPEED BRAKE position.
The ground spoilers can be armed via the SPEED BRAKE lever. The lever must be pulled up when in the RET position to
achieve this.
When the lever is armed (or reverse thrust is selected), all spoiler's surfaces will automatically extend at landing,
or in case of a rejected takeoff.
