wrt 701x气象雷达收发机pfr中虚假故障信息

ENGINEERING编号EIWRT-701X气象雷达收发机（PN622-5132-622/623）PFRWRT-701XRECEIVER-TRANSCEIVER(CPN622-5132-622/623)ENGINEERING编号EIWRT-701X气象雷达收发机（PN622-5132-622/623）PFRWRT-701XRECEIVER-TRANSCEIVER(CPN622-5132-622/623)-UNDESIRABLEFAULTSINPOSTFLIGHTREPORT标题机型章节WRT-701XSIL01-IssuedbyRockwellIssue2006-04-ThisEIisderivedfromECMRtoTDMSforA320FAMfleet.A.InacontinuingefforttoreducetheunwarrantedremovalofWRT-701XunitsonAirbusairplanes,CollinshasdeterminedthatanumberoftheseremovalscanbeattributedtothewaythePWSweatherradarmonitorsexternalinputs.ThepurposeofthisletteristoinformtheoperatorsaboutundesirablefaultsthatmaybedisplayedonECAMandreportedinthePostFlightReportandtoprovidesomeguidelinetomaintenanceB.背景和介绍BACKGROUNDandThefollowingclass1faultmessagesareoccasionallyreportedbyDMC(DisplayManagementComputer)inthePostFlightReport(PFR),accordingtodisplay airplanefamily.13ENGINEERING在上述所有案例中，当探测到故障时，ECAM上会显示“NAVPREDDETFAULT”警告，ND示琥珀色的“PREDW/S”信息，但是气象雷达1和2ENGINEERING在上述所有案例中，当探测到故障时，ECAM上会显示“NAVPREDDETFAULT”警告，ND示琥珀色的“PREDW/S”信息，但是气象雷达1和2Inallcasesmentionedabove,whenthefaultisdetected,acorrelatedECAMwarning"NAVPREDW/SDETFAULT"isreportedandthemessagePREDW/SisdisplayedinamberonND’s,howeverthereisnoassociatedfaultrecordedbytheweatherradar1and2.Investigationshaveshownthattheabovefaultsarereportedunderthefollowing，PWS电门在AUTOPWSisinAUTOpositionontheweatherradarcontrol2300FTAircraftisinairandtheradioaltitudeisbelow2300ATC/TCAS控制面板上，ATC和/或TCAS电门在STBYATCand/orTCASswitchisinSTBYmodeontheATC/TCAScontrol（即逻辑关系不满足），风切变模式无法被自动激活，PWS气象雷达就探测到风切变系统的故障并Undertheaboveconditions,thePWSweatherradardetectsawindshearsystemfaultbecauseonequalifierisnotvalidwhiletheairplaneisinairandisflyinginawindshearprotectedarea.Sincethewindshearmodecannotbeautomaticallyactivated,theweatherradarreportsafaultontheARINC453busesthatareusedbyDMC’seventuallybytheFWC(FlightWarningComputer).Howevernofaultisrecordedbyweatherradarastherootcauseisacombinationofexternalabnormalconditionsinstandbywhileaircraftinair).23ENGINEERINGC当PFR报告中有上述故障信息时，根据AMM程序执行EISINPUTTEST(EIS输入测试)。如测试通过，则WhentheabovefaultsarereportedinENGINEERINGC当PFR报告中有上述故障信息时，根据AMM程序执行EISINPUTTEST(EIS输入测试)。如测试通过，则WhentheabovefaultsarereportedinPFR,performaEIS(ElectronicInstrumentSystem)inputTestasperAMMprocedure.IfthetestresultsareOK,itmeanstheWXR/DMCinterfaceworksproperly