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the flight controls in the RH wing,
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the flight controls in the tail section.
R **ON A/C 059-099, 102-149, 151-199, 201-299, 301-399, 401-499,
The system has a pulsation dampener 2092GM installed immediately downstream of the electric pump. It smoothes the output of the electric pump. Also installed downstream of the electric pump are a pressure switch 2074GJ and a check valve 2050GM. The pressure switch monitors the output pressure of the electric pump. The check valve stops the flow of fluid toward the electric pump if the system is pressurized from another source.
The supply to all of the consumers goes through the HP manifold 2111GM. The supply to all of the consumers other than the slat motor and CSM/G also goes through the Leakage Measurement System (LMS) manifold.
The HP manifold has ports which connect it to other parts of the system as follows:
-a system pressure inlet from the pump, RAT and ground supply,
-two outlets to the LMS manifold,
- one outlet to the slat motor and CSM/G,
- one outlet to the RAT,
- one connection to/from the system accumulator 2070GM,
- one outlet to the return (LP) circuit.
A solenoid valve on the HP manifold controls the flow of fluid to the LMS manifold. The solenoid valve is operated from the maintenance panel 50VU in
the flight compartment. A HP filter 2048GM is installed on the system pressure inlet of the HP manifold. The filtration rating of the filter is 15 microns.
R R R R A pressure relief valve 2063GM installed on the HP manifold prevents too much pressure in the system. The pressure relief valve opens when the pressure increases to 237 bar (3436 psi). It closes when the pressure decreases to 220 bar (3190 psi).
R R R R Two pressure switches 2151GN and 10CE-1 on the HP manifold monitor the pressure in the system. The pressure switch 2151GN sends data to the ECAM and warning systems. The pressure switch 10CE-1 sends data to the flight control system only. A pressure transmitter 2065GN transmits pressure data to the ECAM and warning system.
The sampling valve 2187GM is installed on the HP manifold. It makes it possible to get samples of the system fluid for analysis. It is possible to take the sample with the system at full pressure.
The priority valve 2064GM is also installed on the HP manifold. It stops the supply of fluid to non-essential consumers (slats and CSM/G) if the pressure in the system is too low. The priority valve closes (and stops the supply) when the pressure decreases to 130 +0 -3 bar (1885 +10 -43 psi). The valve opens when the pressure increases to 140 +0 -5 bar (2030 +0 -72,5 psi).
Check valves are installed on the HP manifold to control the flow of fluid to and from the manifold.
The system accumulator 2070GM has a direct connection to the HP manifold. The accumulator keeps the pressure in the system free from small changes. It also makes a supply of fluid available to replace any temporary shortage. This can happen if there is a sudden large demand and the pump has not had time to respond. The accumulator is pre-charged with nitrogen to 1885 psi (130 bar). It holds 0.18 l (0.0475 USgal) of useable fluid when it is full (at 3000 psi (206 bar)). A gas charging valve 2071GM and a pressure gage 2072GM are installed on the accumulator.
The LMS manifold 2146GM makes it possible to measure the internal leakage of groups of consumers. The HP supply is divided into three separate outputs, one to each of: - the flight controls in the LH wing, - the flight controls in the RH wing, - the flight controls in the tail section.
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Measurement of internal leakage is done with a ground hydraulic supply and a flowmeter (Ref. 29-19-00). The LMS manifold also makes it possible to isolate parts of the system for maintenance.
The Blue hydraulic system supplies these consumers:
-from the HP manifold (downstream of the priority valve):
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the LH slat Power Control Unit (PCU) motor,
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the CSM/G.
-from the HP manifold, through the LMS manifold (upstream of the priority valve):
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the LH and RH spoiler 3,
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the LH and RH ailerons,
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the LH and RH slat Wing Tip Brake (WTB),
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the LH and RH flap (WTB),
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the LH and RH elevators,
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the rudder.
-from the HP manifold, upstream of the LMS manifold and priority valve:
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