航线CRJ-200 Fuel System

2FuelSystemGoalsandObjectivesKnowledgeoffuelsystemcomponentsFAR121FuelRegulationsKnowledgeofCRJFuelSystemComponents,Controls,andIndications121FUELFAR’S121.639Supply,AllDomestic-dispatched,alternate,45min121.641Nonturbine,Flag-dispatched,alternate,30min+15%cruiseor90min121.643Nonturbine,Supplemental-released,alternate,45min121.645Turbines,FlagandSupplemental-released,10%,alternate,30minholdingspeed121.647Factors-wind&forecastedconditions/traffic/approach/delaylandingCombustionNewton’sLawCommandofPowerGasTurbineFuels-liquidhydrocarbons-JETA/A-1/BAdditivesBasicComponentsFuelTanksFuelLinesFuelValves-Motor-SolenoidCollectorTankFuelPumps-Engine-Boost-EjectorsCRJFUELSYSTEMFunTimes.4FuelTanksRightWingTankCenterTankLeftWingTankCollectorTanks14,518lbsUseableFuel(Approx5HrFOB)JetA(Primary)MixingOkayNoAdditives4FuelTanksRightWingTankCenterTankLeftWingTankCollectorTanks3FuelSystemWingTanksCenterTankCollectorTanksWETWING5TANKS:1Centertank2Wingtanks2CollectorTanksFUELTANKCONFIGURATION6FuelTanks-LayoutLeftMainTankLeftCollectorTankRightCollectorTankCenterTankFuelSystemalsoconsistsof-Onewayflowvalves•Attachedtotheribs•PreventsoutwardflowoffuelNACAVentsystem•Lowdragventsprovideslightpositivepressureandpressurerelease•LocatedonthebottomtrailingedgeofthewingClimbvent8FuelTanks-SupplyOne-WayFlowValves7FuelTanks-VentsNACAVentMagnastickWaterDrainNacaVentMAGNETICLEVELINDICATORS5TOTALGALORLITERSCORRECTIONSBASEDONINCLINOMETERSMLI’S(AlsocalledMagnasticks)INCLINOMETERSFuelSystemCapacityWingtanks4760lb.-Pressurerefuel(x2=9520)4488lb.-Gravityrefuel•Centertank4998lb.-Pressurerefuel4930lb.-Gravityrefuel•Total14518lb.-Pressurerefuel13906lb.-Gravityrefuel612#differenceDeterminingFuelQuantityFuelSystemComputer..Usessignalsfromcapacitanceprobescorrectedforaircraftattitude.Manualmode•MLI’sonthebottomofthewing.•LevelIndicatoronflightdeckwall.•Correctiontableonrefuelingdoor.CAPACITANCEPROBES15Totalplus2CompensatorsFuelIndicationIndicationturnsAmberwhenLessthan900lbs.totalorimbalancebetweenwingtanksexceeds400lbs.EICASPRIMARYEICASFUELSYSTEMPAGESINGLEPOINTREFUELING–RIGHTFORWARDWINGROOTOver-wingcapREFUEL/DEFUELCONTROLPANELNoFlightDeckSwitchesRequiredBITECheckpreventsover-fillPre-selectdesiredfuelFuelTransferHowdoesthefuelgetfromtheCentertanktotheengines.•CentertanktoWingTankTransferejectors•WingTankstoCollectorTanksScavengeejectorsGravity•CollectortankstoEngineFuelPumpMainejectorsElectricBoostpumps6FuelTanks-LayoutLeftMainTankLeftCollectorTankRightCollectorTankCenterTankFUELTRANSFERCenterTanktoWingTankstoCollectorTankstoEngines6FuelTanks-LayoutLeftMainTankLeftCollectorTankRightCollectorTankCenterTankFUELTRANSFERXFEREJECTORSSCAVENGEEJECTORSMAINEJECTORSELECBOOSTPUMPSFUELSYSTEMHowdotheEjectorPumpswork?EjectorsandMotiveflowTransferejectors—CentertanktowingsScavengeejectors—WingstocollectorMainejectors—Collectortoengine•Allusemotiveflowfromtheenginedrivenpumps.•DCboostpumpbacksupthemainejectorstosupplytheenginewithfuelincaseofamainejectorfailure.FuelTransferHappensautomatically•Fuelfromthecentertanktransferstothewingtankswhentheyfallbelow94%full•ComputeropensthemotiveflowvalvesandtheejectorpumpsmovethefuelFUELCONTROLPANELFUELCONTROLPANELINOPLightsindicateswitchlightshavenotbeenarmed,ortheBoostPumpsareINOPorproducinglowpressureFUELCONTROLPANELONindicateslessthan9psifromMainEjectorandbothBOOSTPUMPSareoperating.ONONFUELCONTROLPANELLightsOutisNormalIndicationwithenginesrunning.MeanspumpsareARMEDbutnotoperating.FuelCrossFlowControlsthefuelbalancebetweenwings..CautionmessageappearsontheEICASwhenfuelimbalanceexceeds400lbs3ways•Automode..When200lbsormoreimbalanceoccursthecomputerstartsautocrossflow•Manualmode..WhenAutomodeinop•GravityCrossflow..FuelflowsfromonewingtotheotherbygravityFuelCrossflowX-FLOWManualFuelTransferOPENPUMPVALVEGravityFuelTransferFUELSYSTEMSUMMARYFullyautomatic(w/manualbackup)FueldisplayscolorcodedEICASmessagesalertpilotstomalfunctionsReviewtimeWhatisthepurposeofthecollectortanks?Howdoesfuelgettotheengineduringstart?Whatisthemaximumfuelimbalance?