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The steering system receives actuating hydraulic pressure, when :
‐ The A/SKID & N/W STRG switch is on
‐ The towing control lever is in the normal position
‐ At least one engine is running, and
‐ The aircraft is on ground.
The nose landing gear doors must be closed in order for the green hydraulic system to apply
pressure to the actuating cylinder.
The handwheel can turn the nosewheel up to 75 ° in either direction. A lever, on the towing electrical
box (on nose landing gear), enables the ground crew to deactivate the steering system for towing.
Then the wheel can be turned 95 ° in either direction.
To prevent rudder pedal orders, or autopilot orders, from going to the BSCU, the pilots can use the
pushbutton on either steering handwheel.
An internal cam mechanism returns the nosewheel to the centered position after takeoff.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
LANDING GEAR
NOSE WHEEL STEERING - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-32-20-10 P 2/8
FCOM 19 AUG 10
DESCRIPTION
Applicable to:
A hydraulic actuating cylinder steers the nosewheel. The green hydraulic system supplies pressure
to the cylinder, and electric signals from the Brake and Steering Control Unit (BSCU) control it.
The BSCU receives orders from the :
Captain and First Officer’s steering handwheels ‐ (orders added algebraically)
‐ Rudder pedals
‐ Autopilot.
The BSCU transforms these orders into the nosewheel steering angle. This angle has the following
limits, that depend on ground speed and the origin of the orders.
The steering system receives actuating hydraulic pressure, when :
‐ The A/SKID & N/W STRG switch is on
‐ The towing control lever is in the normal position
‐ At least one engine is running, and
‐ The aircraft is on ground.
The nose landing gear doors must be closed in order for the green hydraulic system to apply
pressure to the actuating cylinder.
The handwheel can turn the nosewheel up to 75 ° in either direction. A lever, on the towing electrical
box (on nose landing gear), enables the ground crew to deactivate the steering system for towing.
Then the wheel can be turned 95 ° in either direction.
To prevent rudder pedal orders, or autopilot orders, from going to the BSCU, the pilots can use the
pushbutton on either steering handwheel.
An internal cam mechanism returns the nosewheel to the centered position after takeoff.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
LANDING GEAR
NOSE WHEEL STEERING - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-32-20-10 P 3/8
FCOM 19 AUG 10
DESCRIPTION
Applicable to:
,
,
MSN,,
4538,,
A hydraulic actuating cylinder steers the nosewheel. The yellow hydraulic system supplies pressure
to the cylinder, and electric signals from the Brake and Steering Control Unit (BSCU) control it.
The BSCU receives orders from the :
Captain and First Officer’s steering handwheels ‐ (orders added algebraically)
‐ Rudder pedals
‐ Autopilot.
The BSCU transforms these orders into the nosewheel steering angle. This angle has the following
limits, that depend on ground speed and the origin of the orders.
The steering system receives actuating hydraulic pressure, when :
‐ The A/SKID & N/W STRG switch is on
‐ The towing control lever is in the normal position
‐ At least one engine is running, and
‐ The aircraft is on ground.
The handwheel can turn the nosewheel up to 75 ° in either direction. A lever, on the towing electrical
box (on nose landing gear), enables the ground crew to deactivate the steering system for towing.
Then the wheel can be turned 95 ° in either direction.
To prevent rudder pedal orders, or autopilot orders, from going to the BSCU, the pilots can use the
pushbutton on either steering handwheel.
An internal cam mechanism returns the nosewheel to the centered position after takeoff.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
LANDING GEAR
NOSE WHEEL STEERING - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-32-20-10 P 4/8
FCOM 19 AUG 10
ARCHITECTURE
Applicable to:
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
LANDING GEAR
NOSE WHEEL STEERING - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-32-20-10 P 5/8
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
LANDING GEAR
NOSE WHEEL STEERING - DESCRIPTION
A318/A319/A320/A321 FLEET DSC-32-20-10 P 6/8
FCOM 19 AUG 10
ARCHITECTURE
　
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