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Engines can also be started using standard Flight Simulator “Autostart” key combination (Ctrl-E). Electrical and bleed air supply
must still be established.
Manual startup
To start an engine manually, do the following:
• Rotate MODE selector to IGN/START position, this identies engine start.
• Push corresponding MAN START button on overhead, this identies manual start and opens engine start vave.
• Monitor N2 rpm, at 15% move corresponding MASTER switch to ON. This opens fuel valve and engages the igniters.
• After engine is started, return MODE selector to NORM.
Shutdown
To shutdown an engine, move corresponding MASTER switch to OFF. After engines shutdown, the fuel pump buttons on overhead
panel are normally switched to OFF.
A319/320/321
Systems Manual
Phoenix Simulation Software P 77
REV 01 SEQ 001 Hydraulics
Overview
The hydraulic system is made up of three separate and independent systems: Green, Blue, and Yellow. Each is supplied by its
own hydraulic reservoir. Each system provides pressure to operate many major components, such as ight controls, slats and
aps, landing gear, cargo doors, and the emergency generator. Each system has its own pump (or pumps), reservoir, accumulator,
and except for the Blue system, a re valve.
The Green system is powered by Engine 1 driven pump. The Yellow system is powered by Engine 2 driven pump, or a backup
electrical pump. The Blue system is powered by an electrical pump, or by the Ram Air Turbine in case of emergency.
The Green and Yellow hydraulic systems have a power transfer unit (PTU) installed. The PTU allows transfer of pressure between
the Green and Yellow systems. When there is a predetermined pressure difference between the Green and Yellow systems, the
PTU operates to pressurize the low system.
Controls and indications
HYD control panel (overhead)
ENG 1 PUMP
ƒ ENG 2 PUMP
„ ELEC PUMP
… RAT MAN ON † PTU
‚ ELEC PUMP
ENG 1 PUMP
ƒ ENG 2 PUMP
Control operation of engine pumps.
NO LIGHT: On, a pump pressurizes its hydraulic system when the engine is running.
OFF: Pump is depressurized.
‚ ELEC PUMP
Control operation of blue electrical pump.
NO LIGHT: Auto, the pump operates when AC power is supplied and any engine is running.
OFF: Pump is deenergized.
„ ELEC PUMP
Control operation of yellow electrical pump.
NO LIGHT: Off, the pump is deenergized.
ON: Pump constantly works if AC power is available.
… RAT MAN ON
This guarded button, when pushed, extends the Ram Air Turbine to pressurize the Blue system.
† PTU
Controls the operation of Power Transfer Unit.
NO LIGHT: Auto, the PTU automatically operates if the differential pressure between the Green and Yellow systems exceeds
a predetermined limit.
OFF: The PTU is deactivated.
A319/320/321
Systems Manual
Phoenix Simulation Software P 78
REV 01 SEQ 001 Hydraulics
Controls and indications (continued)
ECAM HYD page
This page shows a diagram of hydraulics operation. The Green, Blue and Yellow systems are shown with their components. The
displayed components are (bottom to top):
• Hydraulic reservoir and hydraulic uid level
• Fire shutoff valves (Green and Yellow systems)
• Pumps
• Hydraulic pressure readout.
The pumps are represented by boxes. Following indications are used:
Pump is selected ON
Pump is selected ON but supplying low pressure
Pump is selected OFF
When PTU is operating, the arrows indicate the direction of power transfer.
LO
A319/320/321
Systems Manual
Phoenix Simulation Software P 79
REV 01 SEQ 001 Pneumatics
Overview
The pneumatic system is designed to provide air pressure for air conditioning, engine starting, wing anti-icing and hydraulic
reservoir pressurization. High pressure air can be supplied by engine bleed systems, APU bleed, or external power.
Engine 1 and 2 bleed systems are connected by a common duct. APU and ground air sources are also connected to the duct.
System logic prevents the pneumatic duct from being pressurized by more than one source of air.
Engine bleed air is normally bled from the intermediate pressure (IP) stage of the engines’ high pressure compressor. This
minimizes fuel penalties. If pressure and/or temperature from the IP stage is not adequate, air is bled from a high pressure (HP)
stage of the same compressor. Engine bleed air pressure is regulated by the engine bleed valve, which also functions as a shutoff
valve. The engine bleed valve closes during engine start, or when APU bleed valve opens.
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PSS A319/A320/A321 Systems Manual 系统手册(29)
