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  <xsd:element id="utx_OtherComprehensiveIncomeLossASU201601adoptionimpactonDerivativesArisingDuringPeriod" name="OtherComprehensiveIncomeLossASU201601adoptionimpactonDerivativesArisingDuringPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="utx_OtherComprehensiveIncomeLossASU201601adoptionimpactonSecuritiesArisingDuringPeriod" name="OtherComprehensiveIncomeLossASU201601adoptionimpactonSecuritiesArisingDuringPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="utx_OtherComprehensiveIncomeLossASU201601adoptionimpactonforeigncurrencytranslationArisingDuringPeriod" name="OtherComprehensiveIncomeLossASU201601adoptionimpactonforeigncurrencytranslationArisingDuringPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="utx_OtherComprehensiveIncomenetsettlementandcurtailmentloss" name="OtherComprehensiveIncomenetsettlementandcurtailmentloss" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_OtherFundsMember" name="OtherFundsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_OtherGeographicRegionsMember" name="OtherGeographicRegionsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element id="utx_OtherLongTermDebtFairMarketValueAdjustments" name="OtherLongTermDebtFairMarketValueAdjustments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="utx_OtherLongTermLiabilitiesFairValueDisclosure" name="OtherLongTermLiabilitiesFairValueDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
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  <xsd:element abstract="true" id="utx_OtherPensionPlanAssetsMember" name="OtherPensionPlanAssetsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="utx_PatentsAndTrademarksMember" name="PatentsAndTrademarksMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_PecentageOfInterestRateSensitivityOfPensionPlanLiabilitiesFixedIncomePortfolioDesignedToHedge" name="PecentageOfInterestRateSensitivityOfPensionPlanLiabilitiesFixedIncomePortfolioDesignedToHedge" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_PensionPayoutProgramVoluntaryLumpSumValue" name="PensionPayoutProgramVoluntaryLumpSumValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_PensionPlanAssetsLeveledMember" name="PensionPlanAssetsLeveledMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element id="utx_PercentageOfInventoryForLongTermContractsOrPrograms" name="PercentageOfInventoryForLongTermContractsOrPrograms" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="utx_PercentageOfInventoryForLongTermContractsScheduledForDeliveryWithinSucceeding12Months" name="PercentageOfInventoryForLongTermContractsScheduledForDeliveryWithinSucceeding12Months" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="utx_PercentageOfProjectedBenefitObligationComprisedOfDomesticPlanBenefits" name="PercentageOfProjectedBenefitObligationComprisedOfDomesticPlanBenefits" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
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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_PreviouslyRecognizedCustomerFundingtoContractLiability" name="PreviouslyRecognizedCustomerFundingtoContractLiability" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="utx_PrimaryGeographicalMarketsAxis" name="PrimaryGeographicalMarketsAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
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  <xsd:element id="utx_ProFormaNonrecurringAdjustmentAmortizationofinventoryandfixedassetfairvalueadjustment" name="ProFormaNonrecurringAdjustmentAmortizationofinventoryandfixedassetfairvalueadjustment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
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  <xsd:element id="utx_ProFormaNonrecurringAdjustmentEliminationofentitiesheldforsale" name="ProFormaNonrecurringAdjustmentEliminationofentitiesheldforsale" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
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  <xsd:element id="utx_ProFormaNonrecurringAdjustmentInterestexpenseincurredonacquisitionfinancingnet" name="ProFormaNonrecurringAdjustmentInterestexpenseincurredonacquisitionfinancingnet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="utx_ProFormaNonrecurringAdjustmentUTCRockwellfeesforadvisorylegalaccountingservices" name="ProFormaNonrecurringAdjustmentUTCRockwellfeesforadvisorylegalaccountingservices" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="utx_ProFormaNonrecurringAdjustmentUtilizationofcontractualcustomerobligation" name="ProFormaNonrecurringAdjustmentUtilizationofcontractualcustomerobligation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="utx_ProFormaNonrecurringAdjustmentsNet" name="ProFormaNonrecurringAdjustmentsNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="utx_ProceedsfromsaleofEntityheldforsale" name="ProceedsfromsaleofEntityheldforsale" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
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  <xsd:element id="utx_ProceedsfromthesaleoftheinvestmentinWatscoInc." name="ProceedsfromthesaleoftheinvestmentinWatscoInc." nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
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  <xsd:element id="utx_ProductWarrantyAccrualOther" name="ProductWarrantyAccrualOther" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="utx_ProductsUnderLease" name="ProductsUnderLease" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <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 abstract="true" id="utx_PurchaseofAnnuityContractMember" name="PurchaseofAnnuityContractMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_RangeOfGrowthSeekingAssetsInCompanysOverallInvestmentStrategy" name="RangeOfGrowthSeekingAssetsInCompanysOverallInvestmentStrategy" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_RangeOfIncomeGeneratingAssetsInCompanysOverallInvestmentStrategy" name="RangeOfIncomeGeneratingAssetsInCompanysOverallInvestmentStrategy" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_ReclassificationfromOCIcurrentperiodASU201601adoptionimpact" name="ReclassificationfromOCIcurrentperiodASU201601adoptionimpact" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
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  <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_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 id="utx_RevenueRemainingPerformanceObligationstoberecognizedwithin24months" name="RevenueRemainingPerformanceObligationstoberecognizedwithin24months" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <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_RockwellCollinsMember" name="RockwellCollinsMember" 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 abstract="true" id="utx_SECReleaseNo.3310532Member" name="SECReleaseNo.3310532Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_SalesTypeAxis" name="SalesTypeAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_SalesTypeDomain" name="SalesTypeDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_SatisfiedPortionofthePerformanceObligationofCIP" name="SatisfiedPortionofthePerformanceObligationofCIP" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <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 id="utx_ScheduleofSegmentReportingInformationbyGeographicMarketTableTextBlock" name="ScheduleofSegmentReportingInformationbyGeographicMarketTableTextBlock" 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" />
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  <xsd:element id="utx_SegmentReportingDisclosureProductSalesTypeTextBlock" name="SegmentReportingDisclosureProductSalesTypeTextBlock" 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_ShortTermDebtWeightedAverageInterestRateAvgOutstanding" name="ShortTermDebtWeightedAverageInterestRateAvgOutstanding" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <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 abstract="true" id="utx_TaylorCompanyMember" name="TaylorCompanyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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_TwoYearsPriorActionsMember" name="TwoYearsPriorActionsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_U.S.DefenseContractManagementSecondClaimagainstPrattandWhitneyMember" name="U.S.DefenseContractManagementSecondClaimagainstPrattandWhitneyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <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_USTCJATaxLawChangeMember" name="USTCJATaxLawChangeMember" 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_ValuationAllowancesandReservesAdditionsforAdjustments" name="ValuationAllowancesandReservesAdditionsforAdjustments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" 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:element id="utx_ValuationAllowancesandReservesCreditedtoIncomeTaxExpense" name="ValuationAllowancesandReservesCreditedtoIncomeTaxExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_Variableratetermloandue20201monthLIBORplus1.25Member" name="Variableratetermloandue20201monthLIBORplus1.25Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_WatscoMember" name="WatscoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>
