wrt 701x氣象雷達(dá)收發(fā)機pfr中虛假故障信息

ENGINEERING編號EIWRT-701X氣象雷達(dá)收發(fā)機（PN622-5132-622/623）PFRWRT-701XRECEIVER-TRANSCEIVER(CPN622-5132-622/623)ENGINEERING編號EIWRT-701X氣象雷達(dá)收發(fā)機（PN622-5132-622/623）PFRWRT-701XRECEIVER-TRANSCEIVER(CPN622-5132-622/623)-UNDESIRABLEFAULTSINPOSTFLIGHTREPORT標(biāo)題機型章節(jié)WRT-701XSIL01-IssuedbyRockwellIssue2006-04-ThisEIisderivedfromECMRtoTDMSforA320FAMfleet.A.InacontinuingefforttoreducetheunwarrantedremovalofWRT-701XunitsonAirbusairplanes,CollinshasdeterminedthatanumberoftheseremovalscanbeattributedtothewaythePWSweatherradarmonitorsexternalinputs.ThepurposeofthisletteristoinformtheoperatorsaboutundesirablefaultsthatmaybedisplayedonECAMandreportedinthePostFlightReportandtoprovidesomeguidelinetomaintenanceB.背景和介紹BACKGROUNDandThefollowingclass1faultmessagesareoccasionallyreportedbyDMC(DisplayManagementComputer)inthePostFlightReport(PFR),accordingtodisplay airplanefamily.13ENGINEERING在上述所有案例中，當(dāng)探測到故障時，ECAM上會顯示“NAVPREDDETFAULT”警告，ND示琥珀色的“PREDW/S”信息，但是氣象雷達(dá)1和2ENGINEERING在上述所有案例中，當(dāng)探測到故障時，ECAM上會顯示“NAVPREDDETFAULT”警告，ND示琥珀色的“PREDW/S”信息，但是氣象雷達(dá)1和2Inallcasesmentionedabove,whenthefaultisdetected,acorrelatedECAMwarning"NAVPREDW/SDETFAULT"isreportedandthemessagePREDW/SisdisplayedinamberonND’s,howeverthereisnoassociatedfaultrecordedbytheweatherradar1and2.Investigationshaveshownthattheabovefaultsarereportedunderthefollowing，PWS電門在AUTOPWSisinAUTOpositionontheweatherradarcontrol2300FTAircraftisinairandtheradioaltitudeisbelow2300ATC/TCAS控制面板上，ATC和/或TCAS電門在STBYATCand/orTCASswitchisinSTBYmodeontheATC/TCAScontrol（即邏輯關(guān)系不滿足），風(fēng)切變模式無法被自動激活，PWS氣象雷達(dá)就探測到風(fēng)切變系統(tǒng)的故障并Undertheaboveconditions,thePWSweatherradardetectsawindshearsystemfaultbecauseonequalifierisnotvalidwhiletheairplaneisinairandisflyinginawindshearprotectedarea.Sincethewindshearmodecannotbeautomaticallyactivated,theweatherradarreportsafaultontheARINC453busesthatareusedbyDMC’seventuallybytheFWC(FlightWarningComputer).Howevernofaultisrecordedbyweatherradarastherootcauseisacombinationofexternalabnormalconditionsinstandbywhileaircraftinair).23ENGINEERINGC當(dāng)PFR報告中有上述故障信息時，根據(jù)AMM程序執(zhí)行EISINPUTTEST(EIS輸入測試)。如測試通過，則WhentheabovefaultsarereportedinENGINEERINGC當(dāng)PFR報告中有上述故障信息時，根據(jù)AMM程序執(zhí)行EISINPUTTEST(EIS輸入測試)。如測試通過，則WhentheabovefaultsarereportedinPFR,performaEIS(ElectronicInstrumentSystem)inputTestasperAMMprocedure.IfthetestresultsareOK,itmeanstheWXR/DMCinterfaceworksproperly