ARINC 408A:1976

ARINC 408A:1976 Air Transport Indicator Cases And Mounting Describes mechanical dimensions and thermal standards for aircraft indicators and displays. Thermal interface data is included for indicators and their operating environment. These indicators may be s

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Table of Contents

FOREWORD
PREFACE
1.0INTRODUCTION
1.1Scope
1.2Purpose
1.2.1StandardizationofCaseSizes,ShapesandMounting
1.2.2ImprovementofOverallReliability
1.3ReferenceDocuments
2.0DESIGNSTANDARDS
2.1SizeConcept
2.1.1FlangelessSquareandRectangularCases
2.1.2FlangelessRoundCases
2.1.3Flange-MountedVerticalScaleCases
2.2Mounting
2.2.1FlangelessSquareandRectangularCases
2.2.2FlangelessRoundCases
2.2.3Flange-MountedVerticalScaleCases
2.3CoolingandThermalAppraisal
2.3.1CoolingInterface
2.3.1.1ExternalCaseCooling
2.3.1.2EquipmentInternalHeatDissipationLimits
2.3.1.3CaseTemperatureInterfaceLimits
2.3.2InstrumentThermalAppraisal
2.3.2.1ThermalInterface
2.3.2.1.1CaseSideTemperature
2.3.2.1.2FrontFaceandKnobTemperature
2.3.2.1.3InternalComponentTemperatureSurvey
2.4ARINCCaseNumbering
3.0DESIGNCRITERIAANDGUIDANCE
3.1General
3.2Case(orHousing)
3.2.1FlangelessSquareandRectangular
3.2.2FlangelessRound
3.2.3Flange-MountedVerticalScale
3.3Bezel(orEscutcheon)
3.3.1FlangelessSquareandRectangular
3.3.2FlangelessRound
3.3.3Flange-MountedVerticalScale
3.4Mounting
3.4.1FlangelessSquare,RectangularandRoundCases
3.4.1.1ClampMounting
3.4.1.1.1FlangelessSquareRectangular
3.4.1.1.2FlangelessRound
3.4.1.2.MooringPlate(FlangelessSquareandRectangular
Only)
3.4.1.3AdapterPlate(FlangelessSquareandRectangular
Only)
3.4.2Flange-MountedVerticalScaleCases
3.4.3IndicatorRecommendedMinimumMountingSeparation
3.4.3.1FlangelessSquare,RectangularandRoundCases
3.4.3.2Flange-MountedVerticalSquareCases
3.5Sealing
3.6ThermalManagementRecommendedPractice
3.6.1EquipmentDesignCriteria
3.6.1.1EquipmentDesignEnvironmentTemperatures
3.6.1.2EquipmentThermalManagementDesignandAppraisal
3.6.1.3EquipmentCaseReferenceTemperatureMeasurement
3.6.2GuidanceforAircraftDesigners
3.6.2.1AircraftCoolingSystemDesign
3.6.2.2GroundOperation
3.6.2.3FlightOperation
3.6.2.4AbnormalIn-FlightOperation
3.6.2.5IndicationofAirflow
3.6.2.6SupplementalCooling
3.6.2.7Contamination
3.6.2.8Maintainability
3.6.3GuidanceforAircraftOperators
3.6.4EquipmentOutlineDrawingData
3.7Color
3.7.1BezelColor
3.7.2CaseColor
3.7.3KnobColor
3.8Lighting
3.9CoverGlassandLightingWedges
3.10ElectronicDesign
3.10.1EquipmentComponentPartsApplication
3.10.2Thermal(InternalSurvey)
4.0DIMENSIONALSTANDARDS
4.1General
4.2ProtrusionsontheCase
4.3Connectors
5.0COMPONENTDENSITYANDMOMENTS
5.1FlangelessSquare,Rectangular,andRoundCases
5.2Flange-MountedVerticalScaleCases
ATTACHMENT1StandardMountings,FlangelessSquareand
RectangularCases
ATTACHMENT2StandardMounting,FlangelessRoundCases
ATTACHMENT3StandardMounting,VerticalScaleCases
ATTACHMENT4StandardDimensions,FlangelessSquareand
RectangularCases
ATTACHMENT5StandardDimensions,FlangelessRoundCases
ATTACHMENT6StandardDimensions,VerticalScaleCases
ATTACHMENT7PanelCutouts,FlangelessSquareandRectangular
Cases
ATTACHMENT8PanelCutouts,FlangelessRoundCases
ATTACHMENT9PanelCutouts,VerticalScaleCases
ATTACHMENT10StandardMooringPlates,FlangelessSquareSquare
andRectangularCases
ATTACHMENT11StandardAdapterPlates,FlangelessSquareand
RectangularCases
ATTACHMENT12PreferredConnectorLocations,FlangelessSquare
andRectangularCases
ATTACHMENT13ProceduresforAppraisalofInstrumentCooling
ATTACHMENT14ExcerptsfromMIL-C-26482RelatedDocuments
CoveringRoundConnectors
APPENDIX1BibliographyoftheAEECARINC408AIndicator
CasesandMountingProject

Abstract

Describes mechanical dimensions and thermal standards for aircraft indicators and displays. Thermal interface data is included for indicators and their operating environment. These indicators may be stand alone or part of larger integrated display system.

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