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  <xsd:element id="utx_Recognizedactuarialnetgainlossinnetperiodiccost" name="Recognizedactuarialnetgainlossinnetperiodiccost" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_RedeemableNoncontrollingInterestMember" name="RedeemableNoncontrollingInterestMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_RegisteredShareholdersTotal" name="RegisteredShareholdersTotal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:decimalItemType" xbrli:periodType="instant" />
  <xsd:element id="utx_RemarketingofDebtInstrumentDate" name="RemarketingofDebtInstrumentDate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:dateItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_RemarketingofLongTermDebtDateProceedsReceived" name="RemarketingofLongTermDebtDateProceedsReceived" nillable="true" substitutionGroup="xbrli:item" type="xbrli:dateItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_RepaymentofDebtDate" name="RepaymentofDebtDate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:dateItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_ReserveGuaranteeObligationsAndRentalCommitments" name="ReserveGuaranteeObligationsAndRentalCommitments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="utx_ResolutionofvarioustaxauditappeallitigationactivityMember" name="ResolutionofvarioustaxauditappeallitigationactivityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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_SAndP500IndexMember" name="SAndP500IndexMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_ScheduleOfGuaranteesTextBlock" name="ScheduleOfGuaranteesTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_ScheduleofPrincipalPaymentsonLongtermDebtTableTextBlock" name="ScheduleofPrincipalPaymentsonLongtermDebtTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_ScheduleofUnbilledAccountsReceivableLineItems" name="ScheduleofUnbilledAccountsReceivableLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_ScheduleofUnbilledAccountsReceivableTable" name="ScheduleofUnbilledAccountsReceivableTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_ScheduleofVariableInterestEntitiesAbstract" name="ScheduleofVariableInterestEntitiesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_ScheduleofWeightedaverageinterestratesTableTextBlock" name="ScheduleofWeightedaverageinterestratesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_SellingGeneralAndAdministrativeMember" name="SellingGeneralAndAdministrativeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsVestedInPeriodTotalFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsVestedInPeriodTotalFairValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="utx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsandOtherRestrictedAwardsExercisedInPeriodTotalIntrinsicValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsandOtherRestrictedAwardsExercisedInPeriodTotalIntrinsicValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="utx_ShortTermBorrowingsFairValueDisclosure" name="ShortTermBorrowingsFairValueDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="utx_ShortTermDebtWeightedAverageInterestRateAvgOutstanding" name="ShortTermDebtWeightedAverageInterestRateAvgOutstanding" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="utx_SikorskyMember" name="SikorskyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_StockOptionsAndStockAppreciationRightsSARSMember" name="StockOptionsAndStockAppreciationRightsSARSMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_TaxSettlementGainLossNoncash" name="TaxSettlementGainLossNoncash" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="utx_TaxSettlementInterestGainLossNoncash" name="TaxSettlementInterestGainLossNoncash" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="utx_TotalDebtWeightedAverageInterestRateAvgOutstanding" name="TotalDebtWeightedAverageInterestRateAvgOutstanding" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="utx_TotalSegmentsMember" name="TotalSegmentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_Totalcommercialaerospacecommitmentsafterfiveyears" name="Totalcommercialaerospacecommitmentsafterfiveyears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="utx_Totalcommercialaerospacecommitmentscurrent" name="Totalcommercialaerospacecommitmentscurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="utx_Totalcommercialaerospacecommitmentsfiveyears" name="Totalcommercialaerospacecommitmentsfiveyears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="utx_Totalcommercialaerospacecommitmentsfouryears" name="Totalcommercialaerospacecommitmentsfouryears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="utx_Totalcommercialaerospacecommitmentsthreeyears" name="Totalcommercialaerospacecommitmentsthreeyears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="utx_Totalcommercialaerospacecommitmentstwoyears" name="Totalcommercialaerospacecommitmentstwoyears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="utx_USDefenseContractManagementClaimagainstPrattandWhitneyMember" name="USDefenseContractManagementClaimagainstPrattandWhitneyMember" 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_UnitedStatesExportSales" name="UnitedStatesExportSales" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="utx_UnitedStatesGovernmentSales" name="UnitedStatesGovernmentSales" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_UnitedTechnologiesCorporationMember" name="UnitedTechnologiesCorporationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositionsUncertainTiming" name="UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositionsUncertainTiming" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="utx_ValuationAllowancesAndReservesCreditedToIncomeTaxExpense" name="ValuationAllowancesAndReservesCreditedToIncomeTaxExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="utx_ValuationAllowancesandReservesChargedtoIncomeTaxExpense" name="ValuationAllowancesandReservesChargedtoIncomeTaxExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
</xsd:schema>
