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  <xsd:element abstract="true" id="utx_PrattAndWhitneyMember" name="PrattAndWhitneyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_PrincipalLongTermDebt" name="PrincipalLongTermDebt" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="utx_PriorYearActionsMember" name="PriorYearActionsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_ProgressPaymentsNettedAgainstInventoryForLongTermContractsOrProgramsExcludingGovernment" name="ProgressPaymentsNettedAgainstInventoryForLongTermContractsOrProgramsExcludingGovernment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="utx_ProgressPaymentsNettedAgainstInventoryForLongTermUSGovernmentContractsOrPrograms" name="ProgressPaymentsNettedAgainstInventoryForLongTermUSGovernmentContractsOrPrograms" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="utx_Purchasesaleofsubsidiarysharesfromnoncontrollinginterest" name="Purchasesaleofsubsidiarysharesfromnoncontrollinginterest" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_RestructuringAndRelatedCostsActionsByYearAxis" name="RestructuringAndRelatedCostsActionsByYearAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_RestructuringAndRelatedCostsActionsByYearDomain" name="RestructuringAndRelatedCostsActionsByYearDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_RevolvingCreditAgreementMember" name="RevolvingCreditAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_ServiceandProductWarrantiesandProductPerformanceGuaranteesAbstract" name="ServiceandProductWarrantiesandProductPerformanceGuaranteesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_TotalSegmentsMember" name="TotalSegmentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_TwoYearsPriorActionsMember" name="TwoYearsPriorActionsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_U.S.DefenseContractManagementAgencyClaimAgainstPrattWhitneyMember" name="U.S.DefenseContractManagementAgencyClaimAgainstPrattWhitneyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_UTCAerospaceSystemsMember" name="UTCAerospaceSystemsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_UTCClimateControlsAndSecurityMember" name="UTCClimateControlsAndSecurityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_VariableInterestEntityConsolidatedCarryingAmountCurrentAssets" name="VariableInterestEntityConsolidatedCarryingAmountCurrentAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="utx_VariableInterestEntityConsolidatedCarryingAmountCurrentLiabilities" name="VariableInterestEntityConsolidatedCarryingAmountCurrentLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="utx_VariableInterestEntityConsolidatedCarryingAmountNoncurrentAssets" name="VariableInterestEntityConsolidatedCarryingAmountNoncurrentAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="utx_VariableInterestEntityConsolidatedCarryingAmountNoncurrentLiabilities" name="VariableInterestEntityConsolidatedCarryingAmountNoncurrentLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
</xsd:schema>
