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  <xsd:element abstract="true" id="wab_TransitSegmentMember" name="TransitSegmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="wab_TwoThousandSixteenRefinancingCreditAgreementMember" name="TwoThousandSixteenRefinancingCreditAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="wab_UndistributedEarningsAllocatedToCommonShareholders" name="UndistributedEarningsAllocatedToCommonShareholders" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="wab_UnitracMember" name="UnitracMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="wab_ValuationAllowanceForForeignTaxCreditCarryforwards" name="ValuationAllowanceForForeignTaxCreditCarryforwards" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="wab_WarrantyAndOverhaulReservesMember" name="WarrantyAndOverhaulReservesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="wab_WorkhorseMember" name="WorkhorseMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>
