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OFF.
If the electrical power supply is removed, the pump remains off when electrical
power is applied again.
STBY : The pump is off.
(6) RAT MAN ON pushbutton
The flight crew may extend the RAT at any time by pressing the RAT MAN ON pushbutton.
Note: The RAT automatically extends, if :
‐ AC NORM buses, and Engines 1 and 4 fail, or
‐ Four engines fail, or
‐ GREEN + BLUE LO LVL.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
CONTROLS AND INDICATORS
A330/A340 FLEET DSC-29-20 P 4/16
FCOM 19 AUG 10
OVERHEAD PANEL
Applicable to: ,
(1) ENG 1 (or 2) PUMP pb sw (guarded)
On : The pump pressurizes the system, when the engine is running.
OFF : The pump is depressurized. Hydraulic power generation stops.
FAULT lt : This amber light and an associated ECAM caution come on, if :
‐ The reservoir level is low
‐ The reservoir overheats
‐ Reservoir air pressure in the reservoir is low
‐ The pump pressure is low (inhibited on ground, when the engine is
stopped).
This light goes off, when the crew selects OFF, except during an overheat.
(The light stays on, for as long as the overheat lasts).
(2) GREEN (or YELLOW) ELEC PUMP pushbutton
AUTO : The HSMU automatically controls the pump :
‐ The green electric pump runs :
For 25 s, in the event of a one-engine failure, when the landing selector
lever is selected up and the aircraft speed is above 100 kt.
‐ The yellow electric pump runs :
• In the event of an Engine 2 failure, if the FLAPS lever is not at zero and
the aircraft speed is above 100 kt, provided the green electric pump is
not running for landing gear retraction. It remains running until the last
engine shutdown.
• On ground, when the lever of the cargo door manual selector valve
is set to the OPEN or CLOSE position. In this case, the yellow leak
measurement valve closes, and yellow flap motor operation is inhibited.
OFF : The pump is off.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
CONTROLS AND INDICATORS
A330/A340 FLEET DSC-29-20 P 5/16
FCOM 19 AUG 10
FAULT lt : This amber light, and an associated ECAM caution come on, if :
‐ The reservoir level is low, or
‐ The reservoir overheats, or
‐ Air pressure in the reservoir is low, or
‐ The pump delivers low pressure (inhibited when the pump is not controlled
on), or
‐ The pump overheats.
The light goes off when the crew selects OFF, except during an overheat. In
the case of a reservoir overheat, the fault light stays on, until the overheat
stops. In the case of an electrical pump overheat, the light stays on, even if
the overheat has stopped, and until the system is reset on ground.
Note: If the yellow/green electric pump overheats, the pump automatically
shuts down.
(3) GREEN (or YELLOW) ELEC PUMP ON pushbutton (springloaded-guarded)
AUTO : The electric pump is controlled by the applicable ELEC PUMP pushbutton.
ON : The electric pump is on, provided the ELEC PUMP pushbutton is not selected
OFF.
After an electrical power interruption, the pump does not restart (ON light stays
off).
The ON light comes on blue when the pump is manually or automatically supplied.
(4) BLUE ELEC PUMP pushbutton
Standby : The HSMU automatically controls the electric pump, in the event of an
engine 1 failure in addition to a PRIM 1 or 3 loss.
OFF : The pump is off.
FAULT lt : The amber fault light comes on (provided the blue electrical pump is
running), along with an associated ECAM caution, if :
‐ The reservoir level is low, or
‐ Air pressure in the reservoir or pump pressure is low, or
‐ The reservoir or the pump overheat.
The light goes off when the crew selects OFF, except during an overheat.
In the case of a reservoir or an electrical pump overheat, the fault light stays
on, until the overheat stops.
Note: If the blue electric pump overheats, the pump automatically shuts down.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
CONTROLS AND INDICATORS
A330/A340 FLEET DSC-29-20 P 6/16
FCOM 19 AUG 10
(5) BLUE ELEC PUMP ON pushbutton (springloaded-guarded)
ON : The electric pump is on, provided the ELEC PUMP pushbutton is not selected
OFF.
If the electrical power supply is removed, the pump remains off when electrical
power is applied again.
STBY : The electric pump is controlled by the applicable ELEC PUMP’s pushbutton.
(6) RAT MAN ON pushbutton
The RAT may be extended at any time by pressing the RAT MAN ON pushbutton.
Note: The RAT automatically extends in flight, if :
　
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