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ARINC 611:1988

ARINC 611:1988 Guidance For The Design And Installation Of Fuel Quantity Systems Serves as guidance to airframe and equipment manufacturers for the design and installation of Fuel Quantity Systems (FQS) use on commercial transport aircraft. Describes airlines' desires for future F

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Table of Contents

1.0INTRODUCTION
1.1Purpose
1.2Scope
1.3Background
1.4RelatedDocuments
2.0SYSTEMDESIGNCONSIDERATIONS
2.1Introduction
2.2Accuracy
2.2.1ScopeofAccuracyAnalysis
2.2.2ErrorSources
2.2.2.1TankManufacturingTolerances
2.2.2.2SensorMountingTolerances
2.2.2.3CablingEffects
2.2.2.4SensorHardwareManufacturingTolerances
2.2.2.5ElectronicCircuitTolerances
2.2.2.6DisplayErrors
2.2.2.7FuelCharacteristicVariations
2.2.2.8Stratification
2.2.2.9FuelContaminationandAdditives
2.2.2.10MicrobialGrowth
2.2.2.11ModelingErrors
2.2.2.11.1FidelityofTankStudy
2.2.2.11.2FQSStoredDataResolution
2.2.2.11.3FuelDistributionEffects
2.2.2.11.4DeflectionEffects
2.2.2.11.5AttitudeEffects
2.2.2.12SoftwareErrors
2.2.2.13ExternalData
2.2.3ResultantTotalErrors
2.2.3.1Introduction
2.2.3.2FuelMass
2.2.3.3FuelManagement
2.2.3.4BiasandRandomErrors
2.2.3.5ModelingErrors
2.2.3.6CandidateMethods
2.2.4OperationalAccuracyGoals
2.2.5ReducedAccuracy
2.2.6DegradedAccuracy
2.2.7UnknownAccuracy
2.3Reliability/Redundancy
2.3.1ReliabilityConcerns
Figure2.1-Accuracy-TotalAircraftFuel
2.3.2EffectofFaults
2.3.3RateofFailure
2.4Architecture
2.4.1NewSystemArchitecture
2.4.2StandardInterwiring
2.4.3SensorIsolation
2.4.4UseofShieldedCable
2.4.5In-tankElectronics
2.4.6LRUAdjustments
2.4.7LowFuelIndication
2.5Built-InTestEquipment(BITE)
2.6SystemPerformance
2.7SystemIntegrity
2.7.1Integrity
2.7.2LightningImmunity
2.7.3Composites
2.7.4SensorMultiplexing
2.7.5SystemCriticality
2.7.6Partitioning
2.8AircraftDataBus
2.8.1StandardDataLabels
3.0FUELTANKCONSIDERATIONS
3.1In-TankInstallation
3.2WiringHarnesses
3.3OperationalConsiderations
3.4MaintenanceConsiderations
3.4.1SystemPowerSupply
3.5In-TankWiring
3.5.1Connections
3.5.2StrainReliefandRouting
4.0OPTIONS
APPENDICES
ACommonJetFuelTypes
BAviationJetFuelAdditives
CStudyofFuelCharacteristicsandParameter
Variations
DFuelTankMicrobialGrowth
EWaterConcentrationandDistributionin
AviationFuels
FCombinationofRandomErrors
GGlossary

Abstract

Serves as guidance to airframe and equipment manufacturers for the design and installation of Fuel Quantity Systems (FQS) use on commercial transport aircraft. Describes airlines' desires for future FQS design and installation.

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