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  <xs:element id="wab_DebtInstrumentCovenantPeriodDomain" abstract="true" name="DebtInstrumentCovenantPeriodDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_NonVestedRestrictedStockMember" abstract="true" name="NonVestedRestrictedStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedExpensesAndReserves" abstract="false" name="DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedExpensesAndReserves" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_A4150PercentSeniorNotesDueTwoThousandAndTwentyFourMember" abstract="true" name="A4150PercentSeniorNotesDueTwoThousandAndTwentyFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_BusinessCombinationPercentageofOutstandingSharesTransferred" abstract="false" name="BusinessCombinationPercentageofOutstandingSharesTransferred" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wab_AccountsReceivableAfterAllowanceForCreditLossMaximumRecurringTransfer" abstract="false" name="AccountsReceivableAfterAllowanceForCreditLossMaximumRecurringTransfer" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_ContractWithCustomerLiabilityNewContractAdditions" abstract="false" name="ContractWithCustomerLiabilityNewContractAdditions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_AftermarketMember" abstract="true" name="AftermarketMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_EffectiveIncomeTaxRateReconciliationResearchAndDevelopmentTaxCreditPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationResearchAndDevelopmentTaxCreditPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="wab_GoodwillImpairmentTestWeightOfApproach" abstract="false" name="GoodwillImpairmentTestWeightOfApproach" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="wab_SummaryOfSignificantAccountingPoliciesLineItems" abstract="true" name="SummaryOfSignificantAccountingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wab_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsIncludingGoodwill" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsIncludingGoodwill" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_ScheduleOfRestrictedStockActivityAndIncentiveStockAwardsActivityTableTableTextBlock" abstract="false" name="ScheduleOfRestrictedStockActivityAndIncentiveStockAwardsActivityTableTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="wab_BusinessAcquisitionProFormaGrossProfit" abstract="false" name="BusinessAcquisitionProFormaGrossProfit" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_DebtInstrumentCovenantPeriodTwoMember" abstract="true" name="DebtInstrumentCovenantPeriodTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_A125PercentSeniorNotesDueTwoThousandAndTwentySixMember" abstract="true" name="A125PercentSeniorNotesDueTwoThousandAndTwentySixMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_ComponentsMember" abstract="true" name="ComponentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_RussiaAndCISMember" abstract="true" name="RussiaAndCISMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_GETransportationMember" abstract="true" name="GETransportationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_RestrictedStockAndUnitsMember" abstract="true" name="RestrictedStockAndUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_ExercisePriceRangeFourMember" abstract="true" name="ExercisePriceRangeFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_DebtInstrumentCovenantPeriodAxis" abstract="true" name="DebtInstrumentCovenantPeriodAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="wab_GeneralElectricCompanyMember" abstract="true" name="GeneralElectricCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_DefinedBenefitPlanPlanAssetsPaymentForSettlementAndOther" abstract="false" name="DefinedBenefitPlanPlanAssetsPaymentForSettlementAndOther" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_PlanTwoThousandElevenMember" abstract="true" name="PlanTwoThousandElevenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueRollForward" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wab_A32000PercentSeniorNotesDueTwoThousandAndTwentyFiveMember" abstract="true" name="A32000PercentSeniorNotesDueTwoThousandAndTwentyFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_A3.45PercentSeniorNotesDueTwoThousandandTwentySixMember" abstract="true" name="A3.45PercentSeniorNotesDueTwoThousandandTwentySixMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_GEandPreMergerHoldersMember" abstract="true" name="GEandPreMergerHoldersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_NoncontrollingInterestsPolicyPolicyTextBlock" abstract="false" name="NoncontrollingInterestsPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="wab_IntangibleAssetsDisclosureLineItems" abstract="true" name="IntangibleAssetsDisclosureLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wab_ExercisePriceRangeThreeMember" abstract="true" name="ExercisePriceRangeThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="wab_DebtInstrumentRestrictiveCovenantsEBITDAtoInterestExpenseRatioMinimum" abstract="false" name="DebtInstrumentRestrictiveCovenantsEBITDAtoInterestExpenseRatioMinimum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="wab_OtherEuropeMember" abstract="true" name="OtherEuropeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
