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FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-29-20 P 1/10
FCOM 19 AUG 10
OVERHEAD PANEL
Applicable to: ALL
(1) ENG 1 (2) PUMP pb
On : The pump pressurizes the system when the engine is running.
OFF : The pump is depressurized. The generation of hydraulic power stops.
FAULT lt : This amber light comes on, and the ECAM caution appears, if :
‐ The reservoir level is low
‐ The reservoir overheats
‐ The reservoir air pressure is low
‐ The pump pressure is low (inhibited on the ground, when the engine is
stopped).
This light goes out, when the crew selects OFF, except during an overheat. (The
light stays on as long as the overheat lasts).
(2) BLUE ELEC PUMP pb
AUTO : If AC power is available, the electric pump operates :
‐ In flight
‐ On the ground, if one engine is running or if the crew has pressed the BLUE
PUMP OVRD pushbutton on the maintenance panel.
OFF : The pump is de-energized.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-29-20 P 2/10
FCOM 19 AUG 10
FAULT lt : This amber light comes on, and a caution appears on the ECAM, if :
‐ The reservoir level is low
‐ The reservoir overheats
‐ The air pressure in the reservoir is low
‐ The pump is delivering low pressure (inhibited on the ground, when the
engines are stopped)
‐ The pump overheats.
The light goes out, when the crew selects OFF, except during an overheat. (The
light stays on as long as the overheat lasts).
(3) YELLOW ELEC PUMP pb sw (springloaded)
ON : The electric pump is ON.
If the electrical power supply is removed, the pump will remain off when
electrical power is applied again.
Off : The pump is off.
It comes on automatically when a crewman sets the lever of the cargo door
manual selector valve to OPEN or CLOSE.
This inhibits the operation of other yellow system functions (except alternate
braking and engine 2 reverse).
FAULT lt : This amber light, accompanied by an ECAM caution, comes on if :
‐ the reservoir level is low
‐ air pressure in the reservoir is low
‐ the reservoir overheats
‐ pump pressure is low
‐ the pump overheats.
The light goes out when the crew selects OFF, except during an overheat. (The
light stays on as long as the overheat lasts).
(4) PTU pb sw
AUTO : The bidirectional power transfer unit is armed and both the yellow and the green
electrohydraulic valves are open.
The power transfer unit runs automatically when the differential pressure
between the green and yellow systems is more than 500 PSI.
Note: The PTU is inhibited during the first engine start and automatically
tested during the second engine start.
OFF : Both the green and the yellow PTU electrohydraulic valves close. Power transfer
stops.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-29-20 P 3/10
FCOM 19 AUG 10
FAULT lt : This amber light comes on, and a caution appears on the ECAM, if :
the green or ‐ the yellow reservoir overheats
‐ the green or the yellow reservoir has low air pressure
‐ the green or the yellow reservoir has a low flluid level.
The light goes out when the crew selects OFF, except during an overheat. (The
light stays on as long as the overheat lasts).
(5) RAT MAN ON pb
The flight crew may extend the RAT at any time by pressing the RAT MAN ON pushbutton.
Note: The RAT extends automatically if AC BUS 1 and AC BUS 2 are lost. (Refer to
DSC-24-20 OVERHEAD PANEL (CONT'D)).
MAINTENANCE PANEL
Applicable to: ALL
(1) BLUE PUMP OVRD pushbutton switch (springloaded)
ON : The blue electric pump is on if the ELEC PUMP pushbutton switch on the HYD panel
is at AUTO.
Off : The blue electric pump is off.
(2) LEAK MEASUREMENT VALVES pushbutton switches
OFF: The corresponding electrohydraulic valve closes and shuts off hydraulic supply to the
primary flight controls.
On : The corresponding electrohydraulic valve opens to go back to normal hydraulic
supply.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-29-20 P 4/10
FCOM 19 AUG 10
ECAM HYD PAGE
Applicable to:
(1) Reservoir quantity
It is in green, unless the fluid level goes below the warning level, in which case it becomes
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A320机组操作手册FLIGHT CREW OPERATING MANUAL 3(69)
