南航機(jī)務(wù)培訓(xùn)中心ata45 cmcf system1

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B787

TechnicalTrainingManualMaintenanceCourseME&AVI（GEnx）

LevelI&II–ATA45CentralMaintenanceSystems

THISMANUALISFORTRAININGPURPOSESONLY.

NOMAINTENANCEACTIONSHOULDBETAKENASARESULTOFINFORMATIONCONTAINEDINTHISNOTEBOOK.

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ATA45CentralMaintenanceSystems

Description

Thislessonprovidesinformationoncomponents,interfacesandoperationoftheCentralMaintenanceComputingFunction.

Objectives

Statethepurposeofthesystem.

Identifythemajorsystemcomponentsofthesystem.Statethepurposeofthemajorsystemcomponents.Statethegenerallocationofmajorsystemcomponents.

Describethemajorsysteminterfacesandbeablenormalsystemfunction.

IdentifyandstatethepurposeofthethreetypesOperationalandSystemandLRUreplacement.

Definethetermflightphaseandflightleg

toexplainthe

of

CMCF

tests:

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ATA45-00CentralMaintenanceSystems(I)

GeneralDescription–Introduction-CMScontainsthreeparts:

45-11CentralMaintenanceComputingFunction

45-12AirplaneConditionMonitoringFunction

45-13OnboardDataLoadFunction

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GeneralDescription–Introduction

ATA45-00CentralMaintenanceSystems

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ATA45-11CentralMaintenancecomputingfunction(I)

GeneralDescription–Introduction

Thecentralmaintenancecomputingfunction(CMCF)ispartoftheonboardhealthmanagementsystem(OHMS)inthecommoncoresystem(CCS).TheCMCFcollects,correlatesandstoresmaintenancedataformostoftheairplane

systems.

Shopfaultdetails

Enginebalancinginterface

Proximitysensorrigging

MenuselectionsontheCMCFshowmaintenancefunctionsbasedontypeof

task.

Reportgeneration

TheCMCFfunctionsinclude:

Faultprocessing

Faultcorrelation

Groundtestinterface

Systemconfigurationreports

Dataloadhistory

Faulthistorystorage

Inputmonitoring

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GeneralDescription–introduction

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ATA45-11CentralMaintenancecomputingfunction(I)

GeneralDescription-SystemDescription

Thereiscentralmaintenancecomputingfunction(CMCF)softwareineachcommoncomputingresource(CCR)cabinet.

TheCMCF:

TheCMCFislimitedto4simultaneoussessions.

ThePDSpermitsonlyoneinstanceoftheCMCFontheMFD.

ACMCFsessioncanshowoneachEFBDU

-TheMLMCDFpermitsonlyoneinstanceonthatML.MaintenanceusesCMCFdatato:

Showsystemfaultdetailsthatwouldimpactairplanedispatch

Operategroundtestofasystemand/orcomponentinasystem

Communicatewithairplanesystemsforotherfunctionssuchasflightcontrolriggingandenginebalancing

SendCMCFdatatotheflightdeckprinter.

AgroundtestswitchontheP5overheadenablessomeCMCFfunctionswhenitisintheENABLEorDATALOAD/ENABLEposition.

TheCCRcabinetshavedatagatheringapplications(DGA)thatcollectdatafortheCMCFandtheairplaneconditionmonitoringfunction(ACMF).

DGAdoesread-onlydataretrievalservicesfortheCMCFinputmonitoringfunction.

-Communicatesnetwork

Getsandrecordsfaultdatafromairplanesystems

Getsflightdeckeffectdatafromthedisplaycrewalerting(DCA)function

Correlatesfaultdatawithflightdeckeffects

Showsnon-correlatedfaultdataifthereisnoflightdeckeffect

Showsairplanesystemconfiguration

Createsandsendsreportstothecorenetworkcabinetfileservermodule(FSM)forstorage

CreatesandsendsreportstothedatacommunicationfunctionintheCCRforACARSdatareports.

TheCMCFcanshowon:

Multifunctiondisplay(MFD)oftheprimarydisplaysystem(PDS)

Electronicflightbag(EFB)displayunit(DU)

Maintenancelaptop(ML)maintenancecontroldisplayfunction(MCDF)airplanefunctions.

withairplanesystemsoverthe

common

data

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Studentnotes:

CMCFisingeneralprocessingmodule(GPM)7ofeachleftandrightCCRcabinetofthecommoncoresystem(CCS).

TheBoeingmasterminimumequipmentlist(MMEL)permitstheCMCFtobeinoperativefordispatch.

DGAissoftwarein13GPMsoftheCCS.

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GeneralDescription-SystemDescription

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ATA45-11CentralMaintenancecomputingfunction(II)

Operation-CMCFFaultProcessing

TheCMCF:

Getsfaultdatafromairplanesystems

Validatesthesystemfaultdata

Preventsredundantmessagecreation(removecascadeeffects)

Assignsaspecificmaintenancemessage(MM)tothesystemfault

Calculatesifthefaultshouldbestoredbasedonflightphasescreeninglogic.

Ifthereisfaultdatafromasystembutnoflightdeckeffect(FDE),theCMCFshowsanon-correlatedMMinEXTENDEDMAINTENANCEmenus.

CMCFnon-correlatedMMsoccurinfaulttolerantsystemsthathaveadequateredundancyand/orthefailedcomponentinthe

systemisnotcriticaltoflight.

TheCMCFcorrelatesaMM:

WithaFDEiftheCMCFseesthesystemfaultandtheFDEasbothvalid(active,latched,etc.)andcalculatesifthecorrelatedfaultdatashouldbestoredbasedonflightphaselogic

ThatshowinLINEMAINTENANCEmenus

ThatshowinEXTENDEDMAINTENANCEmenus.

FDEscanshowwithnosystemfault,suchasconditionsthatresultfromengine(s)shutdown(hydraulicengine-drivenpump

pressurelow,generatoroilpressurelow,etc.).

TheCMCFshowstheFDEwiththefaultcode.

TheCMCFdoesnotstoretheFDEwiththefaultcodeifthesystemdoesnotsendfaultdata.

TheCMCFdoesnotcorrelateaMMifthistypeofconditionexist.

CMCFshowsFDEwiththefaultcodeandnocorrelatedMMinaLINEMAINTENANCEmenu.

Maintenancememos(MO)showwhenthefaulttolerantsystemhasafaultbutnotyetgenerateaFDE

CMCFcorrelateseachMMwithaMO

MOsshowinEXTENDEDMAINTENANCEmenus.

Scheduledmaintenancetasks(SMT)showwhenatimeorcyclelimitoccursinaairplanesystem

CMCFcorrelatesaMMwithaSMT

SMTsshowinEXTENDEDMAINTENANCEmenus.

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EICASstatusmessage

Observedfault(faultlight,failureflag,etc.)

Cabinfault.

Anexampleofafaultcodeis34305141(ATA34).

TheCMCFshowsFDEswithfaultcodesandnocorrelatedMMonlyintheLINEMAINTENANCEmenuEXISTINGFLIGHTDECKEFFECTS.

Afaulttolerantsystemisasystemthatcancontinuetooperatewhenpartofthesystemfailsandhasredundancytocontinuesafeoperation.

CMCFMMcorrelationwithamaintenancememo(MO)helpstheairlineplanmaintenancetodecreasetheriskofdispatch-relatedfaultsatout-stations.

TheCMCFshowsMOwith

correlatedMMintheseEXTENDEDMAINTENANCEmenus:

PRESENTLEGFAULTS

EXISTINGFAULTS.

CMCFMMcorrelationwithSMTisrelatedtoacertificationmaintenancerequirement(CMR).(e.g.engineEECcheck).

TheCMCFshowsSMTwithcorrelatedMMintheEXTENDEDMAINTENANCEmenus:

PRESENTLEGFAULTS

EXISTINGFAULTS.

Studentnotes：

ACMCFmaintenancemessage(MM)isa7-digitcodethatrepresentsasystemfault.TheCMCFmakesanMMwhenitgetsafaultfromasystem.

AnexampleofaMMis27-12360(specifictoATA27offlightcontrols).

Non-correlatedMMsshowintheseEXTENDEDMAINTENANCEmenus:

PRESENTLEGFAULTSaftercorrelatedMMs

FAULTHISTORY

EXISTINGFAULTS.

CMCFnon-correlatedMMshavenoeffectondispatchbecuasethereisnoFDE.

CorrelatedMMsshowintheseLINEMAINTENANCEmenus:

INBOUNDFLIGHTDECKEFFECTS

EXISTINGFLIGHTDECKEFFECTS.

CorrelatedMMsshowintheseEXTENDEDMAINTENANCEmenus:

PRESENTLEGFAULTS

EXISTINGFAULTS

FAULTHISTORY.

Afaultcodeisan8-digitcodeforanFDEorobservedfaultsuchas:

EICASalertmessage(warning,caution,advisory)

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Operation-CMCFFaultProcessing

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ATA45-11CentralMaintenancecomputingfunction(II)

Operation-CMCFonPDSMFD

ToshowtheCMCFontheprimarydisplaysystem(PDS)multifunctiondisplay(MFD):

SelecttheSYSswitchonaEFIS/DSPormulti-functionkeypad(MFK)

SelectMAINTonthemenuoftheMFDthatshows

SelectCENTRALMAINTonthemenuofthemaintenancedatapagethatshows.

TheCMCFontheMFD:

HastheREPORTselectiondisabled

Hassomesub-menufunctionsdisabled.

ThestatuspageisthedefaultMFDongroundwithenginesoff.

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Operation-CMCFonPDSMFD

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ATA45-11CentralMaintenancecomputingfunction(II)

Operation-CMCFonEFBDU

ToshowCMCFonanelectronicflightbag(EFB)displayunit(DU):

SelectSYSTEMPAGEontheEFBmainmenu

SelectAIRPLANEMAINTENANCEontheSYSTEMPAGE

SelectCMCF.

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Operation-CMCFonEFBDU

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ATA45-11CentralMaintenancecomputingfunction(II)

Operation-CMCFonMaintenanceLaptop

ToshowtheCMCFmainmenuonthemaintenancelaptop(ML):

Connectthemaintenancelaptoptotheairplane(wiredorwireless)

Selectthemaintenancecontroldisplayfunction(MCDF)icon

SelecttheAIRPLANEFUNCTIONSbuttonontheMCDFbanner

SelecttheCMCFhyperlinkintheAirplaneFunctionsMenu.

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Operation-CMCFonMaintenanceLaptop

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ATA45-11CentralMaintenancecomputingfunction(II)

Operation-CMCFMenu

TheCMCFmenushows:

Amainmenuwithselectionsatthetopofthedisplay

WhichCMCFisinoperationwithleftorrightcentralmaintenancecomputingfunction(CMCF)indicationonthemainscreen.

EachCMCFmainmenuselectionhassub-menuitemsthatshowwhenamainmenuitemisselected.

TheLINEMAINTENANCEsub-menuitemsshowthemostcommonmaintenancefunctionsforfastturn-aroundsatthegate,theyare:

INBOUNDFLIGHTDECKEFFECTS

EXISTINGFLIGHTDECKEFFECTS

GROUNDTESTS

SYSTEMCONFIGURATION

DATALOADHISTORY

EXITMAINTENANCE(showsonmaintenancelaptop(ML)orelectronicflightbag(EFB)).

TheEXTENDEDMAINTENANCEsub-menuitemsshowmaintenancefunctionsthatareusuallydonewhenmoretimeisavailable.

Theyare:

PRESENTLEGFAULTS

EXISTINGFAULTS

FAULTHISTORY(operationalonMLorEFB)

MAINTENANCEENABLE/DISABLE(operationalonMLorEFB)

EXITMAINTENANCE(showsonMLorEFB).

TheOTHERFUNCTIONSsub-menuitemsare:

INPUTMONITORING(operationalonMLorEFB)

ENGINEBALANCING(operationalonMLorEFB)

SHOPFAULTS(operationalonMLorEFB)

PROXIMITYSENSORRIGGING(operationalonMLorEFB)

CENTRALMAINTENANCECOMPUTERSWITCHCONTROL

(operationalonMLorEFB)

SPECIALFUNCTIONS

EXITMAINTENANCE(showsonMLorEFB).

TheHELPselectionoperatesonlywhenCMCFshowsonMLorEFBandhasthesesub-menuitems:

SCREENHELP

GENERALHELP.

TheREPORTselectionoperatesonlywhenCMCFshowsonMLorEFBandhasthesesub-menuitems:

REPORTPAGEDATA

PRESENTLEGFAULTSSUMMARYREPORT

DETAILEDPRESENTLEGFAULTSSUMMARYREPORT

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FAULTHISTORYSUMMARYREPORT

EXISTINGFAULTSSUMMARYREPORT

ALLSYSTEMCONFIGURATIONSUMMARYREPORT

CABINSERVICESSYSTEMFAULTSUMMARYREPORT

OUTPUTSTATUS.

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Operation-CMCFMenu

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ATA45-11CentralMaintenancecomputingfunction(II)

FaultIsolation

Thissubjectcoversinformationonthefaultisolationprocessandtheuseoftheprimarydisplaysystem,crewinformationsystems,centralmaintenancesystemandtoolboxtofaultisolatemalfunctionsontheairplane.

Thefaultisolationprocessontheairplanehas6stepstoquicklyisolateandrepairairplanefaults.

Theprocessuses:

Maintenancelaptop

CMCF

Maintenanceinformation

Primarydisplaysystem

Airplanesystems.

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FaultIsolation

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ATA45-11CentralMaintenancecomputingfunction(II)

FaultIsolation

TheFaultIsolationProcesshasthese6steps:

Verifyfaultexists

Collectmorefaultdata

Isolatethefault

Correctthefault

Returntothefaultisolationtask

Verifyfaultdoesnotexist.

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FaultIsolation

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FaultIsolationProcessStep1-VerifyFaultExists

Thefirststepinthefaultisolationprocessisverifythefaultexists.Typeoffaults:

EICASmessages

Observedfaults

Cabinfaults.

EICASmessages:

Statuslevelorhigher.Observedfaults-problemsobservedbyflightormaintenancepersonnel(otherthanEICASmessages).Observedfaultscaninclude:

Engineexceedances

Damagedorfailedcomponents(suchasafailedramfan,leakinghydraulicfluid,etc.).

Cabinfaults-faultswithsystemsorequipmentinthecabin(suchasbrokenseats,readinglights,etc.)

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FaultIsolationProcessStep1-VerifyFaultExists

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FaultIsolationProcessStep2-CollectMoreFaultData

IfyouhaveanEICASmessage,usetheCMCFtofindthefaultcodeandcorrelatedmaintenancemessage.

Ifyouhaveanobservedfaultorcabinfault,gotoStep3,IsolatetheFault.

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FaultIsolationProcessStep2-CollectMoreFaultData

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FaultIsolationProcessStep3-IsolatetheFault

Thisstepistofindthefaultisolationtask.findthefaultisolationtask,enterthefaultdataintothetoolboxfaultisolationfunction.

Thetypesoffaultdataare:

Faultcode

EICASmessage

Faultdescription(observedfaultorcabinfault).

Maintenancemessage.

Ifthemaintenancelaptopisnotconnectedtotheairplane,manuallyenterthefaultdata.Ifthemaintenancelaptopisconnectedtotheairplane,thefaultdatacanshowautomatically.Afterthefaultdataisentered,therelatedfaultisolationtasksshow.Iftherearedifferentfaultisolationtasksforthefaultcodeandmaintenancemessage,selectthefaultisolationtaskforthefaultcodefirst.

Theremaybeaproceduretodobeforeyoudothetaskforthemaintenancemessage.

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FaultIsolationProcessStep3-IsolatetheFault

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ATA45-11CentralMaintenancecomputingfunction(II)

FaultIsolationProcessStep4-CorrecttheFault

ToolboxRemoteonthemaintenancelaptopshowsdataforthefaultisolationtask.

Followthestepsinthefaultisolationtasktocorrectthefault.Thefaultisolationtaskcanalsolinkto:

-Partsdata

Removal/installation

Testprocedures.

procedures

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FaultIsolationProcessStep4-CorrecttheFault

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ATA45-11CentralMaintenancecomputingfunction(II)

FaultIsolationProcessStep5-ReturntoFaultIsolationTask

Afteryoucorrectthefault,returntothefaultisolationtasktoseeifthefaultisolationprocesshasmoresteps.

ThisstepwasaddedtotheFaultIsolationProcessbecausemechanicssometimesdidnotcompletetheFaultIsolationTask.TheFaultIsolationTaskhasothernecessarysteps(i.e.,Closetheaccessdoor).

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FaultIsolationProcessStep5-ReturntoFaultIsolationTask

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ATA45-11CentralMaintenancecomputingfunction(II)

FaultIsolationProcessStep6-VerifyFaultIsCleared

Makesurethefaultdoesnotexist.Thiscaninclude:

Operatethesystem/componentthathadthefault

GototheflightdeckandmakesuretheEICASmessageorfailflagdoesnotshow.

Signoffthefaultinthelogbook.Thisisafinalvisualcheckbeforeyousignoffthelogbook.

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FaultIsolationProcessStep6-VerifyFaultIsCleared

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ATA45-11CentralMaintenancecomputingfunction(II)

FaultIsolationProcessSummary

Thefaultisolationprocessusesthese6steps:

Verifyfaultexists

Collectmorefaultdata

Isolatethefault

Correctthefault

Returntofaultisolationtask

Verifyfaultiscleared.

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FaultIsolationProcessSummary

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ATA45-12AirplaneConditionMonitoringFunction(I)

AirplaneConditionMonitoringFunction-Purpose

Thepurposeoftheairplaneconditionmonitoringfunction(ACMF)istomonitor,record,andreportairplaneconditions,suchas:

Engineperformance

Airplanesystemsperformance

Trendanalysisofmaintenancedata.

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AirplaneConditionMonitoringFunction-Purpose

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ATA45-12AirplaneConditionMonitoringFunction(I)

AirplaneConditionMonitoringFunction-GeneralDescription

TheACMFhasthreesoftwareapplications:

ACMFsoftware

Datagatheringapplication(DGA)software

Airplanemodifiableinformation(AMI)software.

TheACMFsoftware:

Records,processes,andstoresairplanesystemdata

Makesreportsfrommonitoredairplanesystemdata

Sendsreportstoselectedoutputs

Collectsdataforcontinuousparameterlogging(CPL).

ACMFrecordsdatabasedondefinedtriggers:

Normaltriggers,suchasenginetakeoffthrust,stablecruise,topofdescent,etc.

Whenandwheretosendthereports.

TheAMIcanbemodifiedbyairlineengineeringwiththegroundbasedsoftwaretool(GBST).

Airlinescanalsorecordselectedparameterscontinuously.

Thisisthecontinuousparameterlogging(CPL)function.ACMFdatacangotothe:

Flightdeckprinter

Maintenancelaptop

Fileservermoduleinthecorenetwork

Groundstation(datalink).

FortheseACMFoperations,maintenanceactionisnecessary:

DataloadofACMFsoftwareapplicationscabinet(initialorupdated)

ManualdownloadofACMFrecordeddatacabinet(toprinterormaintenancelaptop)

Troubleshootairplanesystems.

ThemainACMFsoftwareapplicationisinoneGPMinaCCRcabinet.

from

corenetwork

Non-normaloverspeeds,etc.

Thedatagatheringapplication(DGA)softwareinmostoftheGPMscollectsdatafortheACMFandCMCF.Theairlinemodifiableinformation(AMI)isusedbytheairlinetoconfigureACMF:

Whatdatatocollect

Whentocollectthedata

Howtoformatthedataforreports

triggers, such as engine exceedance, airplane

from

corenetwork

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AirplaneConditionMonitoringFunction-GeneralDescription

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ATA45-12AirplaneConditionMonitoringFunction(II)

AirplaneConditionMonitoringFunction-DescriptionofFunction

Theairplaneconditionmonitoringfunction(ACMF)isasoftwareapplicationinacommoncomputingresource(CCR)cabinetgeneralprocessormodule(GPM).

ThesesoftwarecomponentsarenecessaryfortheACMFtooperate:AnACMFpartition(1)-inoneGPMinaCCRcabinet

Theairlinemodifiableinformation(AMI)(1)-inthesameGPMastheACMFpartition

Adatagatheringapplication(DGA)partition(16)-oneineachGPMTheportmappingtable(PMT)(16)-oneineachGPM.

TheACMFstartsautomaticallywhenpowerisappliedtotheairplaneandtotheCCRcabinets.TheAMIgivesinstructionstotheACMF.TheACMFsendinstructionstothedatagatheringapplications(DGA)forwhatairplanedatatorecordandwhentorecord.Dataiscollectedandstoredusinglogicequationsprogrammedtodetectconditions.Examplesareenginelimitexceedances,failures,andotherairlinespecifieddirection.TheDGAsineachGPMgetthedatathroughremotedataconcentrators(RDC)andthecommondatanetwork(CDN).TheACMFreceivesairplanedatafromtheDGAs.TheACMFusestheinstructionsfromtheAMItomakereports,howtoformatthereportsandwheretosendthereportsforoutput.

TheACMFcommunicateswiththecommondatanetwork(CDN).DatafromtheCDNconnectstheCCRcabinetsandtheACMFapplicationintheGPMwiththeseusers:

Crewdisplays

Crewalertingsystem

CDNmembersystems-airplanesystemsconnectedtothecommoncoresystem(CCS)throughtheCDN.

RDCsandmembersconnectedtotheRDCs

Commoncomputingresource(CCR)membersystemsThecorenetwork.

InputstotheACMFapplicationinclude:

DatatorecordandprocessfromtheDGAsAMIinstructionsthatcontrolACMFoperation.

TheACMFoutputsare:

Displayinformationforthemultifunctiondisplay(MFD)Corenetwork

Airplanecommunicationaddressingandreportingsystem(ACARS)Terminalwirelesslocalareanetworkunit(TWLU)

ThecorenetworkconnectstheACMFwiththese:

Thecorenetworkmassstoragedevice-ACMFstoresdatahereTWLU-ACMFdatagoestotheterminalandtheairline

Themaintenancelaptop,usingawiredorwirelessconnection

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Theelectronicflightbagdisplayunits

TheflightdeckprinterSoftwareandDatabaseLoad

Usetheonboarddataloadfunction(ODLF)toinstalltheACMFapplicationandAMIintheapplicableCCRcabinetGPM.

SystemsMonitoringMode

Datagatheringapplicationscollectrealtimeinformationfromsystemsontheairplane.Thedatagathering

applicationssendthisinformationtotheACMFapplicationwhereitisprocessedandstored.

DataReportingMode

UsingthedefinitionsinthesoftwareandAMI,theACMFmakesreportsandsendsthemtopre-determinedoutputs,suchastheflightdeckprinter,ortothegroundwithACARS.

ContinuousParameterLogging(CPL)Function

Continuouslyrecordeddata,definedbytheAMIisstoredinacorenetworkmassstoragedeviceforlaterdownloading.Thisisanindependantfunction,controlledbytheACMFapplication.TheAMIdefineswhichparametersaretoberecorded,whentherecordingstartsandstops,andwherethedataistobestored.CPLdoesnotmakereports,itisrawdatathatisdownloadedandprocessedwithaARINC767DataAnalyzer.

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