故障描述某架PA44-180飞机在完成2000h结构检修时,发现该机左主起落架可折撑杆上部支座断裂,如图2.4.1所示,断口状态如图2.4.2所示。对执管的其他PA44-180飞机主起落架可折撑杆进行了在位普查,未见异常。图2.4.1断裂的主起落架可折撑杆...[继续阅读]

    Gyro-stabilisedplatformsaregenerallycostly,heavy,andrequirealengthyalignmentprocedure.Withtheintroductionofrelativelylowcostbuthigh-performancedigitalcomputers,thesesystemshavebeensteadilyreplacedbymathematicalcomputersoftwaremodels,whichmodifytheoutputsi...[继续阅读]

    FornavigationwithrespecttotheEarth,theaccelerometersinanINSarekeptintheirlocalhorizontalposition,andalignedwithTrueNorth.ThisisachievedbymountingtheaccelerometersintheNorthandEastdirectionsonaNorthalignedgyro-stabilisedplatform,whichisolatestheacceleromet...[继续阅读]

    故障描述某架172R飞机在机场900m高度通场准备加入起落航线时,无线电通信突然中断,机组全面检查设备并重启无效后,确认无线电通信失效,遂立即按照无线电失效处置程序,操纵飞机安全着陆。故障原因(1)地面通电检查:通电检查发现...[继续阅读]

    Thestrap-downsystemdispenseswiththegimbalmountedstableelementandusessolid-stateringlasergyros(RLG)instead.Thesegyrosarenotrequiredtostabilisetheaccelerometers,asinthecaseofanINS,butprovideaeroplaneorientation,bydeterminingtherateofrotationaroundeachofthea...[继续阅读]

    ForTCASIItobeeffective,thepilot:·mustnotmaneuveronthebasisoftheTrafficDisplayorTrafficAdvisory;·mustnotmaneuverhorizontally;·mustobeyallTCASRAsandRAchangesincludingsensereversals;·mustinitiatethefirstmaneuverrequiredbyRAwithin5secondsoftheRAbeinggiven;·mu...[继续阅读]

    故障描述某架Cessna525飞机曾多次发生右发点火系统失效故障,最初检查发现点火PCB板烧蚀,如图3.13.1所示,但更换了点火PCB板后仍然发生PCB板烧蚀问题。进一步检查,还发现了右发点火电嘴烧蚀超标、点火激励器烧坏等问题,由于这些问题...[继续阅读]

    Satellitenavigationwasinitiallydevelopedformilitaryoperations.Thecivilaviationworldnowextensivelyusesthesystem.Available24hoursaday,thesystemprovidesaccuracyandreliabilityneverseenbeforeinaviationsystems.Threesystemsofsatellitenavigationexist:GlobalPositi...[继续阅读]

    TheEngineIndicatingandCrewAlertingSystem(EICAS)displaysprimaryengineindicationsandprovidesacentrallylocatedcrewalertingsystemfornon-normalsituations.Thesystemalsoshowsthestatusofsystems.Ontheground,EICASadditionallyprovidesmaintenancepersonnelwithavariety...[继续阅读]

    Thegyro-stabilisingplatformisself-levellingandself-aligning,butthesefunctionscanonlynormallybecarriedoutinaircraftwiththeaircraftstationaryontheground.Inordertocomputethespeed,distancetravelledandpositionoftheaircrafttheINSmustfirstbereferencedtonorthatth...[继续阅读]