Landing Gear (Contd.)
Nose Wheel Steering
The airplane is equipped with nose wheel steering which is powered by hydraulic system A
when the NOSE WHEEL STEERING switch is in the NORM position. Nose wheel steering is
powered by hydraulic system B when the NOSE WHEEL STEERING switch is placed to ALT.
Nose wheel steering is powered only when the airplane is on the ground. In the event of a
hydraulic leak downstream of the Landing Gear Transfer Unit, resulting in a loss of
hydraulic system B fluid in the reservoir, a sensor closes the Landing Gear Transfer Valve
and alternate steering will be lost.
Primary steering is controlled through the nose wheel steering wheel. Limited steering
control is available through the rudder pedals. A pointer on the nose steering wheel
assembly shows nose wheel steering position relative to the neutral setting. Rudder pedal
steering is deactivated as the nose gear strut extends.
A lockout pin may be installed in the towing lever to depressurize nose wheel steering. This
allows airplane pushback or towing without depressurizing the hydraulic systems.
