Table of Contents
1.0INTRODUCTIONANDDESCRIPTION
1.1PurposeandScope
1.2RelationshiptoOtherDocuments
1.3FunctionalOverview
1.4SystemDescription
1.5Interchangeability
1.6RegulatoryApproval
1.7IntegrityandAvailability
1.8Reliability
1.9TestabilityandMaintainability
1.10FlightSimulators
2.0INTERCHANGEABILITYSTANDARDS
2.1Introduction
2.2FormFactors,ConnectorsandIndexPinCoding
2.3StandardInterwiring
2.4PowerCircuitry
2.5StandardizedSignaling
2.6EnvironmentalConditions
2.7Cooling
2.8Weights
2.9GroundingandBonding
3.0SYSTEMDESIGNCONSIDERATIONS
3.1SystemConfigurations
3.2CertificationDesign
3.3SystemResponsetoPowerInterrupts
3.4FlightManagementSystemAccuracyand
Performance
3.5DualSystemDesignConsiderations
3.6Modularity
3.7ConfigurationData
4.0FLIGHTMANAGEMENTFUNCTION
4.1Introduction
4.2FunctionalInitializationandActivation
4.3FunctionalDescription
4.4TrainingSimulatorSupportFunctions
5.0GNSSSENSORFUNCTION
5.1Description
5.2GeneralSystemCapabilities
6.0PRECISIONLANDINGFUNCTION(BLANKSECTION)
7.0VHFNAVIGATIONFUNCTION(BLANKSECTION)
8.0AIRCRAFTPERSONALITYMODULEDATA
8.1GeneralRequirements
8.2APM
8.3APMData
9.0GNUCONTROLANDDISPLAYUNITINTERFACE
9.1General
9.2StandbyNavigation
9.3SelfTest
9.4MCDUAnnunciators
9.5MCDUAlerting
9.6MCDUColorandFontUsage
10.0ANTENNAS
10.1GeneralRequirements
11.0STANDARDINTERFACES
11.1General
11.2DigitalDataInputPorts
11.3DigitalDataOutputPorts
11.4DiscreteInputs
11.5DiscreteOutputs
11.6IntersystemBus
11.7EthernetInterface
11.8ReservedATEPorts
11.9GNUAnalogInputs
11.10GNUAnalogOutputs
11.11GNURFInterfaces
11.12AircraftPersonalityModule
11.13FrontPanelDataLoadConnector
12.0ELECTRONICFLIGHTINSTRUMENTSYSTEMINTERFACE
12.1General
13.0COMMUNICATIONSMANAGEMENTUNITINTERFACE
13.1General
14.0DATABASESTORAGECONSIDERATIONS
14.1Introduction
14.2NavigationDataBase
14.3AirlineModifiableInformation(AMI)
DataBase
14.4PerformanceDataBase
14.5MagneticVariationDataBase
14.6TerrainandObstacleData
14.7AirportSurfaceMapData
14.8ConfigurationDataBase
15.0BUILT-INTESTANDMAINTENANCEPROVISIONS
15.1GeneralDiscussion
15.2FaultDetectionandReporting
15.3RampMaintenance
15.4ProvisionsforAutomaticTestEquipment
ATTACHMENTS
1-1GNUFunctionalBlockDiagram
1-2SystemInterfaceBlockDiagram
2-1GNUConnectorPositioningandPinLayout
2-2GNUConnectorPositioningandConnector
Layout
3-1StandardInterwiring
3-2NotesApplicabletotheStandardInterwiring
4-1ARINC429InputandOutputBuses
4-2GNUOutputs
5EnvironmentalTestCategories
6DCPowerTransientVoltageRequirements
APPENDICES
AReferenceDocuments
BAcronyms Abstract
Describes the desired characteristics of the Global Navigation Satellite System (GNSS) Navigation Unit (GNU) intended for installation in all types of aircraft. Provides general and specific guidance for the development and installation of GNU equipment intended for airline use.
