题目内容
Ailerons, elevators and rudder are the secondary flight control surfaces of an aircraft.
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Trailing edge (TE) flaps and leading edge (LE) flaps and slats (LE devices) are parts of high lift devices receiving power from hydraulic system B.
Roll control is accomplished by a hydraulically powered rudder and electrically flight spoiler.
Roll control is provided by the ailerons about the airplane’s vertical axis from nose to tail.
If the ailerons or spoilers are not movable, the Captain and the First Officer can use the force exerted to their respective control wheels to find outwhether ailerons or spoilers is available and which control wheel, Captain’s or First Officer’s is functional normally too.
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