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    <ReturnTs>2024-11-13T12:35:55-05:00</ReturnTs>
    <TaxPeriodEndDt>2023-12-31</TaxPeriodEndDt>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2023-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>950865912</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>INTERNATIONAL ASSOCIATION OF MACHINISTS &amp; AEROSPACE WORKERS</BusinessNameLine1Txt>
      </BusinessName>
      <InCareOfNm>% ELAINE B KENNEDY</InCareOfNm>
      <BusinessNameControlTxt>INTE</BusinessNameControlTxt>
      <ForeignPhoneNum>5054536608</ForeignPhoneNum>
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        <AddressLine1Txt>5150 KEARNY MESA RD</AddressLine1Txt>
        <CityNm>SAN DIEGO</CityNm>
        <StateAbbreviationCd>CA</StateAbbreviationCd>
        <ZIPCd>921112001</ZIPCd>
      </USAddress>
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    <BusinessOfficerGrp>
      <PersonNm>MANNY RIVERA</PersonNm>
      <PersonTitleTxt>SECRETARY TREASURER</PersonTitleTxt>
      <SignatureDt>2024-11-13</SignatureDt>
    </BusinessOfficerGrp>
    <TaxYr>2023</TaxYr>
    <BuildTS>2024-10-15 13:58:12Z</BuildTS>
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      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <MembershipDuesAmt>22731</MembershipDuesAmt>
      <InvestmentIncomeAmt>24253</InvestmentIncomeAmt>
      <GainOrLossFromSaleOfAssetsAmt>0</GainOrLossFromSaleOfAssetsAmt>
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      <GrossSalesOfInventoryAmt>99</GrossSalesOfInventoryAmt>
      <GrossProfitLossSlsOfInvntryAmt>99</GrossProfitLossSlsOfInvntryAmt>
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      <OccupancyRentUtltsAndMaintAmt>2824</OccupancyRentUtltsAndMaintAmt>
      <PrintingPublicationsPostageAmt>3494</PrintingPublicationsPostageAmt>
      <OtherExpensesTotalAmt>72268</OtherExpensesTotalAmt>
      <TotalExpensesAmt>81013</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>-13959</ExcessOrDeficitForYearAmt>
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      <OtherChangesInNetAssetsAmt>-148</OtherChangesInNetAssetsAmt>
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        <BOYAmt>229123</BOYAmt>
        <EOYAmt>215164</EOYAmt>
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        <BOYAmt>1474</BOYAmt>
        <EOYAmt>1326</EOYAmt>
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        <BOYAmt>230597</BOYAmt>
        <EOYAmt>216490</EOYAmt>
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        <BOYAmt>230597</BOYAmt>
        <EOYAmt>216490</EOYAmt>
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      <PrimaryExemptPurposeTxt>For the betterment of wages hours &amp; working conditions</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>For the betterment of wages hours &amp; working conditions</DescriptionProgramSrvcAccomTxt>
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      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">JOHN BELLOW</PersonNm>
        <TitleTxt>VICE PRESIDENT</TitleTxt>
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      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">JESUS GARCIA</PersonNm>
        <TitleTxt>RECORDING SECRETARY</TitleTxt>
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      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">ERIC HANKS</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
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        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>40</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">ELAINE KENNEDY</PersonNm>
        <TitleTxt>SECRETARY TREASURER</TitleTxt>
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        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>99</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">JOSE MARTINEZ</PersonNm>
        <TitleTxt>CONDUCTOR SENTINEL</TitleTxt>
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        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
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      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">JOSE PEREZ</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
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        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
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      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm referenceDocumentName="CompensationExplanation">JOSEPH ZIMOLZAK</PersonNm>
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        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
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        <PersonNm>MANNY RIVERA</PersonNm>
        <USAddress>
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          <CityNm>SAN DIEGO</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>92111</ZIPCd>
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      <ForeignOfficeInd>false</ForeignOfficeInd>
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      <RelatedOrganizationCtrlEntInd>false</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>false</TransactionWithControlEntInd>
      <PoliticalCampaignActyInd referenceDocumentName="IRS990ScheduleC">false</PoliticalCampaignActyInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
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        <FormAndLineReferenceDesc>Doing Business As Names</FormAndLineReferenceDesc>
        <ExplanationTxt>IAMAW LOCAL LODGE 389</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, line 8</FormAndLineReferenceDesc>
        <ExplanationTxt>| Other Revenues:, Amount:| Form 990-EZ Part I Line 8 Other Revenue: Building Association Allotment, $19200| Form 990-EZ Part I Line 8 Other Revenue: Scholarship Fund Fundraisers, $201| Form 990-EZ Part I Line 8 Other Revenue: Redeposit-Protested Checks, $570|</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>| Other Expenses:, Amount:| Form 990-EZ Part I Line 16 Other Expenses: GL PCT &amp; Supplies, $3797| Form 990-EZ Part I Line 16 Other Expenses: Bonds Premiums &amp; Insurance, $86| Form 990-EZ Part I Line 16 Other Expenses: Bank Chrg &amp; Protested Cks, $12| Form 990-EZ Part I Line 16 Other Expenses: Voluntary Donations, $2324| Form 990-EZ Part I Line 16 Other Expenses: Social, $74| Form 990-EZ Part I Line 16 Other Expenses: Loss on Investment, $9660| Form 990-EZ Part I Line 16 Other Expenses: Airfare, $223| Form 990-EZ Part I Line 16 Other Expenses: Conference Hotel Fees, $579| Form 990-EZ Part I Line 16 Other Expenses: Conference Registration Fees, $1120| Form 990-EZ Part I Line 16 Other Expenses: Dl-947 Payroll Reimbursement, $42509| Form 990-EZ Part I Line 16 Other Expenses: Holiday Party, $4358| Form 990-EZ Part I Line 16 Other Expenses: Meeting Dinners, $343| Form 990-EZ Part I Line 16 Other Expenses: Member Rally Support, $860| Form 990-EZ Part I Line 16 Other Expenses: Printing &amp; Publication, $3347| Form 990-EZ Part I Line 16 Other Expenses: Publicity &amp; Promotion, $300| Form 990-EZ Part I Line 16 Other Expenses: Scholarship Disbursement, $2500| Form 990-EZ Part I Line 16 Other Expenses: Shuttle, $176|</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, line 20</FormAndLineReferenceDesc>
        <ExplanationTxt>| Explanation:, Amount:| Form 990-EZ Part I Line 20 Net Assets: Change in Value of Office Equipment, $-148|</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part II, line 24</FormAndLineReferenceDesc>
        <ExplanationTxt>| Explanation:, BOYAmount:, EOYAmount:| Form 990-EZ Part II Line 24 Other Assets: Office Equipment, $1474, $1326|</ExplanationTxt>
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