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  <xsd:element id="utx_SegmentReportingDisclosureProductTypeTextBlock" name="SegmentReportingDisclosureProductTypeTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_SegmentReportingDisclosureSalesTypeTextBlockTextBlock" name="SegmentReportingDisclosureSalesTypeTextBlockTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" 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 id="utx_SupplementalBalanceSheetInformationOperatingLeasesTableTextBlock" name="SupplementalBalanceSheetInformationOperatingLeasesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="utx_SupplementaloperatingleasecashflowinformationTableTextBlock" name="SupplementaloperatingleasecashflowinformationTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" 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_TaxSettlementPotentialGainLossNoncash" name="TaxSettlementPotentialGainLossNoncash" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="utx_TerminationDate" name="TerminationDate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:dateItemType" 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_U.S.DefenseContractManagementAgencyClaimAgainstPrattWhitneysecondclaimMember" name="U.S.DefenseContractManagementAgencyClaimAgainstPrattWhitneysecondclaimMember" 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 abstract="true" id="utx_UnitedStatesMember" name="UnitedStatesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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_VariousfederalstateandnonUSstatuteoflimitationsexpirationsandsettlementsMember" name="VariousfederalstateandnonUSstatuteoflimitationsexpirationsandsettlementsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="utx_YTDCurrentandPriorYearActionsMember" name="YTDCurrentandPriorYearActionsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>
