a380-Level II - Ata 29 Hydraulic Power
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Transcript of a380-Level II - Ata 29 Hydraulic Power
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A380TECHNICAL TRAINING MANUAL
MAINTENANCE COURSE - T1 & T2 (RR / Metric)LEVEL II - ATA 29 Hydraulic Power
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This document must be used for training purposes only
Under no circumstances should this document be used as a reference
It will not be updated.
All rights reservedNo part of this manual may be reproduced in any form,
by photostat, microfilm, retrieval system, or any other means,without the prior written permission of AIRBUS S.A.S.
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LEVEL II - ATA 29 HYDRAULIC POWERHydraulic Power Description (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Hydraulic System Operation, Control & Indicating (2) . . . . . . . . . . 22Hydraulic Power System Component Location (2) . . . . . . . . . . . . . . 48
MAINTENANCE COURSE - T1 & T2 (RR / Metric)LEVEL II - ATA 29 Hydraulic Power
TABLE OF CONTENTS Mar 21, 2006Page 1
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HYDRAULIC POWER DESCRIPTION (2)System Pressurization
System Pressurization ArchitectureThe two fully independent hydraulic systems operate simultaneouslyand are pressurized at 5000 PSI.In normal operation, each hydraulic system is pressurized by its ownEngine Driven Pumps (EDPs) (two per Engine).On ground only, and with the engines off, the Electro Motor Pumpsare used to pressurize the system for the cargo doors (green circuit)or the body wheel steering (yellow circuit) operation, or formaintenance operations.Each hydraulic system is managed by a Hydraulic System MonitoringUnit (HSMU). The HSMU provides local warnings on the overheadpanel and indications on the Display Units (DUs). They are fullyindependent and are supplied by DC BUS.Each Electro Motor Pump is supplied by AC BUS.One Electro Motor Pump is supplied by AC Ground Service BUS toprovide cargo doors operation.A pressure transmitter is used to monitor system pressure status andis connected to the HSMU. The pressure information is shown on theHYD ECAM page and on the Ground Service Panel (GSP) via pressureindicators.A pressure switch (one per pump) detects a pressure drop of the relatedpump. They send a low-pressure signal to the HSMU when thepressure decreases and the signal disappears when the pressure rises.
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SYSTEM PRESSURIZATION - SYSTEM PRESSURIZATION ARCHITECTURE
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SYSTEM PRESSURIZATION - SYSTEM PRESSURIZATION ARCHITECTURE
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HYDRAULIC POWER DESCRIPTION (2)System Pressurization (continued)
Pressurization From Ground Power UnitGround Power Units (GPUs) through Ground Connectors can be usedto pressurize the HYD systems for maintenance operations.
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SYSTEM PRESSURIZATION - PRESSURIZATION FROM GROUND POWER UNIT
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HYDRAULIC POWER DESCRIPTION (2)System Servicing
AccumulatorOne power accumulator on each circuit is connected to the HP circuitupstream the HP belly fairing manifold.The Power Accumulator is a metal bellow accumulator which isfactory gas pre-charged with Helium.Servicing is done in shop only.
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SYSTEM SERVICING - ACCUMULATOR
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HYDRAULIC POWER DESCRIPTION (2)System Servicing (continued)
Reservoir Pressurization/DepressurizationEach hydraulic reservoir can be pressurized by three different sources:- Engine HP,- Pneumatic system,- GSP.The reservoirs supply hydraulic fluid to the EDPs, the Electro MotorPumps and the cargo door auxiliary pump.The reservoir nominal pressure is 65 PSI (4,1bars).Each reservoir has a pressure relief valve that evacuates air or liquidsin case of fluid overflow or overpressure.A pressure switch monitors the reservoir pressure and triggers awarning in case of low pressure.Air pressure value can be read on the reservoir itself via a directreading gage or on the GSP. For GSP indicators, the air pressure istransmitted from the RSVR pressure transducer via the HSMU to thegage.On the GSP, an air depressurization switch can be manually activatedfor maintenance and a reservoir air pressurization valve is used topressurize both hydraulic reservoirs from a ground servicing unitthrough ground connectors.
WARNING: When using the depress switch, air pressure containingfluid vapors is released from the tank to the rear part ofthe outer engine pylon. Due to the size of the A/C, thisarea is not visible from the GSP only a visual check ofthe area will allow you to make sure the area is clear.
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SYSTEM SERVICING - RESERVOIR PRESSURIZATION/DEPRESSURIZATION
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SYSTEM SERVICING - RESERVOIR PRESSURIZATION/DEPRESSURIZATION
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HYDRAULIC POWER DESCRIPTION (2)System Servicing (continued)
Reservoir Level Check and RefillingThe main components of the reservoir filling system are installed onthe GSP:- filling selector valve which is used to select manually the reservoirto be filled,- filling level gage which indicates the fluid level of the selectedreservoir,- ground self sealing coupling which lets perform the reservoir fillingfrom a ground hydraulic card,- filling hand pump, with its handle and a flexible hose, can be usedto manually fill the hydraulic reservoirs from a HYD can,- filling filter to protect the hydraulic systems from pollution.A level transmitter and a low level switch are used to detect thereservoir low level.On each reservoir, a sight glass is used when the aircraft is notpowered.In addition, the HSMU is connected to the Onboard MaintenanceSystem (OMS) for servicing report shown on the OnboardMaintenance Terminal (OMT).The reservoirs fluid quantities and the hydraulic systems pressuresare shown on the ECAM.There are two filling possibilities:- from a hydraulic ground cart connected to the coupling socket,- from a hydraulic fluid container using the A/C hand pump.When filling from a hydraulic ground cart, a restrictor preventsoverpressure.When no electrical power is available, refilling is possible by usingthe A/C hand pump.Hydraulic reservoirs are filled from the GSP, through the hydraulicsystem return lines.
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SYSTEM SERVICING - RESERVOIR LEVEL CHECK AND REFILLING
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HYDRAULIC POWER DESCRIPTION (2)System Servicing (continued)
Check Of Filters And Fluid SamplingSeveral filters are installed in the hydraulic system.Each HP, return and case drain filters has an electrical and mechanicalclogging indicators (Differential Pressure Indicators).The return filters incorporate a bypass device. On the GSP, thereservoir filling filter has a mechanical clogging indicator and is notelectrically monitored.The filter clogging status is displayed on the OMS via the HSMU.A sampling valve is installed on the HP belly fairing manifold. Itmakes it possible to take samples of fluid from the system (pressurizedor not) for analysis.
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SYSTEM SERVICING - CHECK OF FILTERS AND FLUID SAMPLING
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HYDRAULIC POWER DESCRIPTION (2)System Servicing (continued)
Leak DrainingSome tanks are installed to collect fluid leaks from:- each Electro Motor Pump,- each Hydraulic/Air heat exchangers.- slat and flap Power Control Units (PCUs).
CAUTION: When draining the tanks, fluid spillage on thecomponents/panels in the vicinity can occur. This fluidis likely to have corrosive effects on a long term period,therefore in case of spillage, cleaning will prevent thesecorrosive effects.
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SYSTEM SERVICING - LEAK DRAINING
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SYSTEM SERVICING - LEAK DRAINING
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HYDRAULIC SYSTEM OPERATION, CONTROL & INDICATING (2)General
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HYDRAULIC SYSTEM OPERATION, CONTROL & INDICATING(2)
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GENERAL
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HYDRAULIC SYSTEM OPERATION, CONTROL & INDICATING (2)EMP Manual System Pressurization
EMP Controls
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EMP MANUAL SYSTEM PRESSURIZATION - EMP CONTROLS
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HYDRAULIC SYSTEM OPERATION, CONTROL & INDICATING(2)
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HYDRAULIC SYSTEM OPERATION, CONTROL & INDICATING (2)EMP Manual System Pressurization (continued)
EMP Indication
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HYDRAULIC SYSTEM OPERATION, CONTROL & INDICATING(2)
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EMP MANUAL SYSTEM PRESSURIZATION - EMP INDICATION
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EMP MANUAL SYSTEM PRESSURIZATION - EMP INDICATION
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HYDRAULIC SYSTEM OPERATION, CONTROL & INDICATING(2)
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EMP MANUAL SYSTEM PRESSURIZATION - EMP INDICATION
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HYDRAULIC SYSTEM OPERATION, CONTROL & INDICATING(2)
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HYDRAULIC SYSTEM OPERATION, CONTROL & INDICATING (2)EMP Manual System Pressurization (continued)
System PressureStatus Indication
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HYDRAULIC SYSTEM OPERATION, CONTROL & INDICATING(2)
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EMP MANUAL SYSTEM PRESSURIZATION - SYSTEM PRESSURE & STATUS INDICATION
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HYDRAULIC SYSTEM OPERATION, CONTROL & INDICATING (2)EMP Manual System Pressurization (continued)
Reservoir Quantity IndicationWARNING: When the reservoir temperature is not available, the fill
reference point indication is steady.It shall not be used as a target level.Risk of over/underfill.
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EMP MANUAL SYSTEM PRESSURIZATION - RESERVOIR QUANTITY INDICATION
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EMP MANUAL SYSTEM PRESSURIZATION - RESERVOIR QUANTITY INDICATION
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HYDRAULIC SYSTEM OPERATION, CONTROL & INDICATING (2)EMP AUTO Operation
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EMP AUTO OPERATION
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HYDRAULIC SYSTEM OPERATION, CONTROL & INDICATING (2)System Servicing
AccumulatorReservoir Pressurization
WARNING: HF point:Remote location of outlet pipe
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SYSTEM SERVICING - ACCUMULATOR & RESERVOIR PRESSURIZATION
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HYDRAULIC SYSTEM OPERATION, CONTROL & INDICATING (2)System Servicing (continued)
Reservoir Refilling
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SYSTEM SERVICING - RESERVOIR REFILLING
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SYSTEM SERVICING - RESERVOIR REFILLING
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SYSTEM SERVICING - RESERVOIR REFILLING
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HYDRAULIC SYSTEM OPERATION, CONTROL & INDICATING (2)System Servicing (continued)
System Filters
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SYSTEM SERVICING - SYSTEM FILTERS
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SYSTEM SERVICING - SYSTEM FILTERS
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HYDRAULIC POWER SYSTEM COMPONENT LOCATION (2)Outer Pylon
Flap Track 5
Inner Pylon
Ground Service Panel
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AIRBUS S.A.S.31707 BLAGNAC cedex, FRANCE
STMREFERENCE L0Y06082
MARCH 2006PRINTED IN FRANCEAIRBUS S.A.S. 2006
ALL RIGHTS RESERVED
AN EADS JOINT COMPANYWITH BAE SYSTEMS
Table of ContentsHydraulic Power Description (2)System PressurizationSystem Pressurization ArchitecturePressurization From Ground Power Unit
System ServicingAccumulatorReservoir Pressurization/DepressurizationReservoir Level Check and RefillingCheck Of Filters And Fluid SamplingLeak Draining
Hydraulic System Operation, Control & Indicating (2)GeneralEMP Manual System PressurizationEMP ControlsEMP IndicationSystem PressureStatus IndicationReservoir Quantity Indication
EMP AUTO OperationSystem ServicingAccumulatorReservoir PressurizationReservoir RefillingSystem Filters
Hydraulic Power System Component Location (2)Outer PylonFlap Track 5Inner PylonGround Service Panel