Table of Contents
1.0INTRODUCTIONANDDESCRIPTION
1.1PurposeofThisDocument
1.2SummaryofGPWSOperational
Characteristics
1.3BriefDescriptionoftheSystem
1.4Interchangeability
1.5RegulatoryApproval
2.0INTERCHANGEABILITYSTANDARDS
2.1Introduction
2.2FormFactor,ConnectorsandIndex
PinCoding
2.3Interwiring
2.4PrimaryPowerInput
2.5SystemFunctionsandSignal
Characteristics
2.6EnvironmentalConditions
2.7Cooling
2.8GroundingandBonding
3.0SYSTEMDESIGNCONSIDERATIONS
3.1GPWSOperation
3.1.1GroundProximityAudibleWarning
3.1.2GroundProximityVisualWarning
3.1.3GlideSlopeDeviationAudibleAlert
3.2OperatingModes
3.2.1AlternateMechanizationsforMode3
3.2.2GlideSlopeModeAutomaticEnablingand
Deactivation
3.2.3GlideSlopeModeManualInhibitFunction
3.2.4GlideSlopeModeRe-Arming
3.3SignalInputs
3.3.1RadioHeightandValidity
3.3.2AltitudeRateandValidity
3.3.3LandingGearandFlapDiscretes
3.3.4GlideSlopeDeviationandValidity
3.3.5Self-Test
3.3.6Inhibit(AllModes)
3.3.7GlideSlopeModeAutomaticEnablingand
Deactivation
3.3.8GlideSlopeModeManualInhibit
3.4SignalOutputs
3.4.1GroundProximityWarningDiscrete(Visual)
Warning
3.4.2GroundProximityAudibleWarnings
3.4.3GlideSlopeModeAudibleAlerts
3.4.4MonitorOutput
3.5GrowthFeatures
3.6GeneralGuidance
3.6.1BarometricAltitudeRateDataValidity
ClosetotheGround
3.6.2OperationalFactorsAffectingGPWS
InstallationDesign
4.0STANDARDSIGNALCHARACTERISTICS
4.1InputSignals
4.1.1RadioHeight
4.1.2RadioHeightValidity
4.1.3AltitudeRate(AC)
4.1.4AltitudeRate(DC)
4.1.5AltitudeRateValidity
4.1.6LandingGearDiscrete(+28VDC)
4.1.7LandingGearDiscrete(Ground)
4.1.8FlapDiscrete(Ground)
4.1.8.1LogicType"A"
4.1.8.2LogicType"B"
4.1.9FlapPositionDiscrete(+28VDC)
4.1.9.1LogicType"C"
4.1.9.2LogicType"D"
4.1.10GlideSlopeDeviation(LowLevel)
4.1.11GlideSlopeDeviation(HighLevel)
4.1.12GlideSlopeDeviationValidity
4.1.13Self-TestInitiation
4.1.14InhibitAllModes(+28VDC)
4.1.15InhibitAllModes(Ground)
4.1.16GlideSlopeModeInhibit(Ground)
4.1.17GlideSlopeModeInhibit(+28VDC)
4.1.18GlideSlopeModeEnable(Ground)
4.1.19GlideSlopeModeEnable(+28VDC)
4.1.20GrowthInputs
4.1.20.1DigitalAltitudeRate
4.1.20.2KIFISAltitudeInput
4.1.20.3FineSynchroAltitudeInput
4.1.20.4KIFISAltitudeValidityInput
4.1.20.5MachNumberInput
4.1.20.5.1SynchroInput
4.1.20.5.2D.C.AnalogInput
4.2OutputSignals
4.2.1GroundProximityWarningDiscrete
(VisualWarning)
4.2.2AudibleWarningandAlertOutputs
(LowLevel)
4.2.3AudibleWarningandAlertOutputs
(HighLevel)
4.2.4MonitorOutput
4.2.5GrowthOutputs
4.2.5.1FlashingVisualWarningOutput
4.2.5.2GlideSlopeVisualAlertOutput
4.2.5.3GlideSlopeModeManualInhibitActive
Output
5.0PROVISIONSFORAUTOMATICTESTEQUIPMENT
5.1General
5.2UnitIdentification
5.2.1PinAllocation
5.2.2UseofATLASLanguage
ATTACHMENTS
1GPWComputerConnectorPositioning
2Interwiring
3EnvironmentalTestCategories
4ElectricalCharacteristicsofRadioHeight
InputSignaltoGPWS
5LogicInputSneakCircuitProtection
APPENDICES
1ChronologyandBibliography
2Part1:TechnicalStandardOrderfor
GPWSEquipment
PART2:GPWSWarningEnvelopes Abstract
Provides characteristics of a Ground Proximity Warning System (GPWS) designed for installation in civil, turbine-powered aircraft. Provides general and specific guidance for the development and installation of a GPWS for airline use.
