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  <xs:element id="wab_ChangeinContractwithCustomerLiabilityRollForward" abstract="true" name="ChangeinContractwithCustomerLiabilityRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wab_MultiCurrencyRevolvingLoanFacilityMember" abstract="true" name="MultiCurrencyRevolvingLoanFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_IncreaseDecreaseInAccruedLiabilitiesAndCustomerDeposits" abstract="false" name="IncreaseDecreaseInAccruedLiabilitiesAndCustomerDeposits" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_PlanTwoThousandMember" abstract="true" name="PlanTwoThousandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_CorporateAndEliminationsMember" abstract="true" name="CorporateAndEliminationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_A4375PercentSeniorNotesDueTwoThousandAndTwentyThreeMember" abstract="true" name="A4375PercentSeniorNotesDueTwoThousandAndTwentyThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
