DOC AIRBUS | TSM A320FGREEN MAIN HYDRAULIC POWER - TASK SUPPORTING DATA
** ON A/C NOT FOR ALL
1. System Description
The Green main hydraulic system has the subsequent sub-systems:
The Green main hydraulic system has the subsequent sub-systems:
Hydraulic Schematic- a HP system which supplies the consumers,
- a LP or return system through which the fluid returns to the reservoir,
- a suction system.
- an HP system which supplies the consumers,
- an LP or return system through which the fluid returns to the reservoir,
- a suction system.
A. HP System
The HP system is usually pressurized by an engine-driven pump (EDP) 1030GK connected to the left (No 1) engine. The EDP is connected directly to the engine and operates together with it. A solenoid valve makes it possible to stop the supply of fluid from the EDP. The solenoid valve is operated from the flight compartment with the P/B switch 1705GK.
The power transfer unit (PTU) 1088GM can also pressurize the Green HP circuit. The PTU gets its power from the Yellow main system. It supplies power to the Green system automatically if the system pressure falls to 500 psi (34.5 bar) below the pressure in the Yellow system. There is no hydraulic connection between the two systems so fluid can not get from one system to the other.
On the ground, it is possible to pressurize the system from a ground supply through the self-sealing connectors on the ground service panel.
The supply to all consumers (except the thrust reverser) goes through the HP manifold 1011GM. The HP manifold has pressure switches, a filter, a check valve, a transmitter, a solenoid valve and other components which control the system. The supply to all consumers other than the flap and slat motors, nose wheel steering, nose and main landing gears and doors also goes through the leakage-measurement system manifold 1146GM. Thus it is possible to isolate some consumers to measure the internal leakage of parts of the system.
The HP system is usually pressurized by an engine-driven pump (EDP) 1030GK connected to the left (No 1) engine. The EDP is connected directly to the engine and operates together with it. A solenoid valve makes it possible to stop the supply of fluid from the EDP. The solenoid valve is operated from the flight compartment with the P/B switch 1705GK.
The power transfer unit (PTU) 1088GM can also pressurize the Green HP circuit. The PTU gets its power from the Yellow main system. It supplies power to the Green system automatically if the system pressure decreases to 500 psi (34.5 bar) below the pressure in the Yellow system. There is no hydraulic connection between the two systems so fluid cannot get from one system to the other.
On the ground, it is possible to pressurize the system from a ground supply through the self-sealing connectors on the ground service panel.
The supply to all consumers (except the thrust reverser) goes through the HP manifold 1111GM. The HP manifold has pressure switches, a filter, a check valve, a transmitter, a solenoid valve and other components which control the system. The supply to all consumers other than the flap and slat motors, nose and main landing gears and doors goes through the solenoid valve 1150GP. Thus it is possible to isolate some consumers to measure the internal leakage of parts of the system.
The HP system is usually pressurized by an engine-driven pump (EDP) 1030GK connected to the left (No 1) engine. The EDP is connected directly to the engine and operates together with it. A solenoid valve makes it possible to stop the supply of fluid from the EDP. The solenoid valve is operated from the flight compartment with the P/B switch 1705GK.
The power transfer unit (PTU) 1088GM can also pressurize the Green HP circuit. The PTU gets its power from the Yellow main system. It supplies power to the Green system automatically if the system pressure falls to 500 psi (34.5 bar) below the pressure in the Yellow system. There is no hydraulic connection between the two systems so fluid can not get from one system to the other.
On the ground, it is possible to pressurize the system from a ground supply through the self-sealing connectors on the ground service panel.
The supply to all consumers (except the thrust reverser) goes through the HP manifold 1011GM. The HP manifold has pressure switches, a filter, a check valve, a transmitter, a solenoid valve and other components which control the system. The supply to all consumers other than the flap and slat motors, nose wheel steering, nose and main landing gears and doors also goes through the leakage-measurement system manifold 1146GM. Thus it is possible to isolate some consumers to measure the internal leakage of parts of the system.
The HP system is usually pressurized by an engine-driven pump (EDP) 1030GK connected to the left (No 1) engine. The EDP is connected directly to the engine and operates together with it. A solenoid valve makes it possible to stop the supply of fluid from the EDP. The solenoid valve is operated from the flight compartment with the P/B switch 1705GK.
The power transfer unit (PTU) 1088GM can also pressurize the Green HP circuit. The PTU gets its power from the Yellow main system. It supplies power to the Green system automatically if the system pressure decreases to 500 psi (34.5 bar) below the pressure in the Yellow system. There is no hydraulic connection between the two systems so fluid cannot get from one system to the other.
On the ground, it is possible to pressurize the system from a ground supply through the self-sealing connectors on the ground service panel.
The supply to all consumers (except the thrust reverser) goes through the HP manifold 1111GM. The HP manifold has pressure switches, a filter, a check valve, a transmitter, a solenoid valve and other components which control the system. The supply to all consumers other than the flap and slat motors, nose and main landing gears and doors goes through the solenoid valve 1150GP. Thus it is possible to isolate some consumers to measure the internal leakage of parts of the system.
B. LP System
The LP system returns the fluid from the consumers to the reservoir. The case drains of the EDP and PTU, and the returns from the HP manifold, are also connected to the LP system. The system has check valves where applicable to control the flow of fluid. The check valves also protect the main system if there is a leak in a subsystem. Some of the return lines are connected together at the LP manifold 1003GM. Part of the LP system is also used in the reservoir filling system.
The LP fluid goes through the LP filter 1002GM before it gets to the system reservoir 1000GQ.
A filter 1084GM is also installed in the EDP case drain line to the LP system.
The system reservoir 1000GQ is installed in the main landing gear compartment.
The reservoir is filled through the reservoir filling system which is operated from the ground service panel of the Green system. A reservoir drain valve is installed on the reservoir.
The reservoir is pressurized with air to 3.5 bar (50 psi). The supply of air comes from the aircraft pneumatic system. It is also possible to pressurize the reservoir from a ground supply. A depressurization valve 1187GM is installed on the ground service panel of the Green system.
The LP system returns the fluid from the consumers to the reservoir. The case drains of the EDP and PTU, and the returns from the HP manifold, are also connected to the LP system. The system has check valves where applicable to control the flow of fluid. The check valves also give a protection to the main system if there is a leak in a subsystem. Some of the return lines are connected together at the LP manifold 1003GM. Part of the LP system is also used in the reservoir filling system.
The LP fluid goes through the LP filter 1002GM before it gets to the system reservoir 1000GQ.
A filter 1084GM is also installed in the EDP case drain line to the LP system.
The system reservoir 1000GQ is installed in the main landing gear compartment.
The reservoir is filled through the reservoir filling system which is operated from the ground service panel of the Green system. A reservoir drain valve is installed on the reservoir.
The reservoir is pressurized with air to 3.5 bar (50 psi). The supply of air comes from the aircraft pneumatic system. It is also possible to pressurize the reservoir from a ground supply. A depressurization valve 1187GM is installed on the ground service panel of the Green system.
The LP system returns the fluid from the consumers to the reservoir. The case drains of the EDP and PTU, and the returns from the HP manifold, are also connected to the LP system. The system has check valves where applicable to control the flow of fluid. The check valves also protect the main system if there is a leak in a subsystem. Some of the return lines are connected together at the LP manifold 1003GM. Part of the LP system is also used in the reservoir filling system.
The LP fluid goes through the LP filter 1002GM before it gets to the system reservoir 1000GQ.
A filter 1084GM is also installed in the EDP case drain line to the LP system.
The system reservoir 1000GQ is installed in the main landing gear compartment.
The reservoir is filled through the reservoir filling system which is operated from the ground service panel of the Green system. A reservoir drain valve is installed on the reservoir.
The reservoir is pressurized with air to 3.5 bar (50 psi). The supply of air comes from the aircraft pneumatic system. It is also possible to pressurize the reservoir from a ground supply. A depressurization valve 1187GM is installed on the ground service panel of the Green system.
The LP system returns the fluid from the consumers to the reservoir. The case drains of the EDP and PTU, and the returns from the HP manifold, are also connected to the LP system. The system has check valves where applicable to control the flow of fluid. The check valves also give a protection to the main system if there is a leak in a subsystem. Some of the return lines are connected together at the LP manifold 1003GM. Part of the LP system is also used in the reservoir filling system.
The LP fluid goes through the LP filter 1002GM before it gets to the system reservoir 1000GQ.
A filter 1084GM is also installed in the EDP case drain line to the LP system.
The system reservoir 1000GQ is installed in the main landing gear compartment.
The reservoir is filled through the reservoir filling system which is operated from the ground service panel of the Green system. A reservoir drain valve is installed on the reservoir.
The reservoir is pressurized with air to 3.5 bar (50 psi). The supply of air comes from the aircraft pneumatic system. It is also possible to pressurize the reservoir from a ground supply. A depressurization valve 1187GM is installed on the ground service panel of the Green system.
C. Suction System
The engine pump 1030GK gets its supply of fluid directly from the Green reservoir 1000GQ. The fire shut-off valve 1046GK permits to isolate the supply of the engine pump.
The engine pump 1030GK gets its supply of fluid directly from the Green reservoir 1000GQ. The fire shut-off valve 1046GK permits to isolate the supply of the engine pump.
The engine pump 1030GK gets its supply of fluid directly from the Green reservoir 1000GQ. The fire shut-off valve 1046GK permits to isolate the supply of the engine pump.
The engine pump 1030GK gets its supply of fluid directly from the Green reservoir 1000GQ. The fire shut-off valve 1046GK permits to isolate the supply of the engine pump.