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  <xs:element id="dco_SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsWeightedAverageContractualTermAbstract" abstract="true" name="SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsWeightedAverageContractualTermAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="dco_SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" abstract="true" name="SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="dco_DefinedContributionPlansParticipantGroupOneMember" abstract="true" name="DefinedContributionPlansParticipantGroupOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="dco_DeferredCompensationPlanMember" abstract="true" name="DeferredCompensationPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="dco_NumberOfDefinedContributionPlans" abstract="false" name="NumberOfDefinedContributionPlans" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="dco_DefinedContributionPlanEmployerMatchingPercentOfEmployeeContribution" abstract="false" name="DefinedContributionPlanEmployerMatchingPercentOfEmployeeContribution" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="dco_DefinedContributionPlanEmployeeContributionsPercentageOfEligibleCompensation" abstract="false" name="DefinedContributionPlanEmployeeContributionsPercentageOfEligibleCompensation" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="dco_DefinedContributionPlanProvisionforMatchingandProfitSharingContributions" abstract="false" name="DefinedContributionPlanProvisionforMatchingandProfitSharingContributions" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DefinedBenefitPlanPlanswithBenefitObligationsinExcessofPlanAssetsAmountinExcess" abstract="false" name="DefinedBenefitPlanPlanswithBenefitObligationsinExcessofPlanAssetsAmountinExcess" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DefinedBenefitPlanNumberOfActivePlans" abstract="false" name="DefinedBenefitPlanNumberOfActivePlans" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="dco_NumberOfUnfundedSupplementalRetirementPlans" abstract="false" name="NumberOfUnfundedSupplementalRetirementPlans" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="dco_PensionAndOtherPostretirementDefinedBenefitPlansAccruedEmployeesCompensationAndWithholdingsCurrentAndNoncurrent" abstract="false" name="PensionAndOtherPostretirementDefinedBenefitPlansAccruedEmployeesCompensationAndWithholdingsCurrentAndNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_PensionObligationsAndOtherLongTermLiabilities" abstract="false" name="PensionObligationsAndOtherLongTermLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_AccruedBenefitLiability" abstract="false" name="AccruedBenefitLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DefinedBenefitPlanNetPeriodicBenefitCostCreditInterestCostStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag" abstract="false" name="DefinedBenefitPlanNetPeriodicBenefitCostCreditInterestCostStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="dco_DefinedBenefitPlanNetPeriodicBenefitCostCreditExpectedReturnLossStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag" abstract="false" name="DefinedBenefitPlanNetPeriodicBenefitCostCreditExpectedReturnLossStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="dco_DefinedBenefitPlanNetPeriodicBenefitCostCreditAmortizationOfGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag" abstract="false" name="DefinedBenefitPlanNetPeriodicBenefitCostCreditAmortizationOfGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="dco_PensionandOtherPostretirementBenefitPlansAccumulatedOtherComprehensiveIncomeLossbeforeTaxRollForward" abstract="true" name="PensionandOtherPostretirementBenefitPlansAccumulatedOtherComprehensiveIncomeLossbeforeTaxRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="dco_DefinedBenefitPlanAmortization" abstract="false" name="DefinedBenefitPlanAmortization" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DefinedBenefitPlanUnrecognizedActuarialNetGainsLosses" abstract="false" name="DefinedBenefitPlanUnrecognizedActuarialNetGainsLosses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DefinedBenefitPlanAmortizationOfUnrecognizedGainsLosses" abstract="false" name="DefinedBenefitPlanAmortizationOfUnrecognizedGainsLosses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossTaxImpact" abstract="false" name="DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossTaxImpact" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DefinedBenefitPlanFairValueofPlanAssetsNotIncludingPooledFunds" abstract="false" name="DefinedBenefitPlanFairValueofPlanAssetsNotIncludingPooledFunds" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DefinedBenefitPlanFairValueofPooledFunds" abstract="false" name="DefinedBenefitPlanFairValueofPooledFunds" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_ScheduleOfBenefitObligationsWeightedAverageAssumptionsTable" abstract="true" name="ScheduleOfBenefitObligationsWeightedAverageAssumptionsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="dco_ScheduleOfBenefitObligationsWeightedAverageAssumptionsLineItems" abstract="true" name="ScheduleOfBenefitObligationsWeightedAverageAssumptionsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="dco_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationExpectedLongTermReturnOnAssets" abstract="false" name="DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationExpectedLongTermReturnOnAssets" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="dco_ShareBasedPaymentArrangementBenefitPaymentsInExcessOfCost" abstract="false" name="ShareBasedPaymentArrangementBenefitPaymentsInExcessOfCost" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_OperatingLossCarryforwardNotExpectedtobeRealized" abstract="false" name="OperatingLossCarryforwardNotExpectedtobeRealized" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DeferredTaxAssetsTaxCreditCarryforwardsNet" abstract="false" name="DeferredTaxAssetsTaxCreditCarryforwardsNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DeferredTaxAssetsValuationAllowanceNet" abstract="false" name="DeferredTaxAssetsValuationAllowanceNet" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DeferredTaxAssetsAccruedExpenses" abstract="false" name="DeferredTaxAssetsAccruedExpenses" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DeferredTaxAssetsForwardLossReserves" abstract="false" name="DeferredTaxAssetsForwardLossReserves" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DeferredTaxAssetsEmployeeRelatedObligations" abstract="false" name="DeferredTaxAssetsEmployeeRelatedObligations" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DeferredTaxAssetsEnvironmentalReserves" abstract="false" name="DeferredTaxAssetsEnvironmentalReserves" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DeferredTaxAssetsOperatingLeaseLiability" abstract="false" name="DeferredTaxAssetsOperatingLeaseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DeferredTaxAssetsPension" abstract="false" name="DeferredTaxAssetsPension" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DeferredTaxAssetsTaxCreditCarryforwardsState" abstract="false" name="DeferredTaxAssetsTaxCreditCarryforwardsState" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_DeferredTaxLiabilitiesRightOfUseAsset" abstract="false" name="DeferredTaxLiabilitiesRightOfUseAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseBookCompensationExpenses" abstract="false" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseBookCompensationExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseBookCompensationExpensesPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseBookCompensationExpensesPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="dco_GuaymasMexicoMember" abstract="true" name="GuaymasMexicoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="dco_LocationOneMember" abstract="true" name="LocationOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="dco_LocationTwoMember" abstract="true" name="LocationTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="dco_BusinessInterruptionMember" abstract="true" name="BusinessInterruptionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="dco_PropertyEquipmentInventoriesAndToolingMember" abstract="true" name="PropertyEquipmentInventoriesAndToolingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="dco_SubrogationClaimsMember" abstract="true" name="SubrogationClaimsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="dco_CountyOfSanBernardinoMember" abstract="true" name="CountyOfSanBernardinoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="dco_LossContingencyNumberOfBuildingsAffected" abstract="false" name="LossContingencyNumberOfBuildingsAffected" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="dco_GainContingenciesRelatedToLossOnOperatingAssets" abstract="false" name="GainContingenciesRelatedToLossOnOperatingAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_LossContingencyReceivableProceedsReceivedToDate" abstract="false" name="LossContingencyReceivableProceedsReceivedToDate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_LitigationSettlementFundedByInsuranceAmount" abstract="false" name="LitigationSettlementFundedByInsuranceAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_LossContingencyPropertyAndEquipmentWriteOff" abstract="false" name="LossContingencyPropertyAndEquipmentWriteOff" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_LossContingencyDeductibleAmount" abstract="false" name="LossContingencyDeductibleAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_EstimatedLitigationLiabilityAdditionalAmount" abstract="false" name="EstimatedLitigationLiabilityAdditionalAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_BoeingMember" abstract="true" name="BoeingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="dco_LockheedMember" abstract="true" name="LockheedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="dco_NorthropMember" abstract="true" name="NorthropMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="dco_RTXCompanyMember" abstract="true" name="RTXCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="dco_ViasatIncMember" abstract="true" name="ViasatIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="dco_TopTenCustomersMember" abstract="true" name="TopTenCustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="dco_PercentageOfNetSales" abstract="false" name="PercentageOfNetSales" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="dco_SegmentProfitLoss" abstract="false" name="SegmentProfitLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_GoodwillAndOtherIntangibleAssets" abstract="false" name="GoodwillAndOtherIntangibleAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_OtherComprehensiveIncomeLossDefinedBenefitPlanPriorServiceCostCreditAndGainLossReclassificationAdjustmentFromAOCIAfterTax" abstract="false" name="OtherComprehensiveIncomeLossDefinedBenefitPlanPriorServiceCostCreditAndGainLossReclassificationAdjustmentFromAOCIAfterTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_OtherComprehensiveIncomeLossDefinedBenefitPlanPriorServiceCostCreditAndGainLossReclassificationAdjustmentFromAOCITax" abstract="false" name="OtherComprehensiveIncomeLossDefinedBenefitPlanPriorServiceCostCreditAndGainLossReclassificationAdjustmentFromAOCITax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dco_BLRAerospaceLLCMember" abstract="true" name="BLRAerospaceLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="dco_OtherLiabilitiesCurrentAndNoncurrentMember" abstract="true" name="OtherLiabilitiesCurrentAndNoncurrentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
