content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001554880</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0000001750</issuerCik>
        <issuerName>AAR CORP</issuerName>
        <secFileNumber>001-06263</secFileNumber>
        <issuerAddress>
          <com:street1>1100 N WOOD DALE RD</com:street1>
          <com:city>WOOD DALE</com:city>
          <com:stateOrCountry>IL</com:stateOrCountry>
          <com:zipCode>60191</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>6302272000</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Holmes John McClain III</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Morgan Stanley Smith Barney LLC Executive Financial Services</name>
          <address>
            <com:street1>1 New York Plaza</com:street1>
            <com:street2>38th Floor</com:street2>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10004</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>72274</noOfUnitsSold>
        <aggregateMarketValue>4193149.57</aggregateMarketValue>
        <noOfUnitsOutstanding>34934957</noOfUnitsOutstanding>
        <approxSaleDate>07/27/2023</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>07/27/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Exercise of options under a registered plan</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>72274</amountOfSecuritiesAcquired>
        <paymentDate>07/27/2023</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>JOHN HOLMES</name>
          <address>
            <com:street1>1100 N WOOD DALE RD</com:street1>
            <com:city>WOOD DALE</com:city>
            <com:stateOrCountry>IL</com:stateOrCountry>
            <com:zipCode>60191</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>07/26/2023</saleDate>
        <amountOfSecuritiesSold>7726</amountOfSecuritiesSold>
        <grossProceeds>451261.75</grossProceeds>
      </securitiesSoldInPast3Months>
      <remarks>This Form 144 is being filed for the cashless exercise of options and subsequent sales of the underlying shares commencing on 7/27/2023.</remarks>
      <noticeSignature>
        <noticeDate>07/27/2023</noticeDate>
        <signature>/s/ John McClain Holmes III</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 3555}]
text: 144
  0001554880
  XXXXXXXX
  LIVE
  0000001750
  AAR CORP
  001-06263
  1100 N WOOD DALE RD
  WOOD DALE
  IL
  60191
  6302272000
  Holmes John McClain III
  Officer
  Common
  Morgan Stanley Smith Barney LLC Executive Financial Services
  1 New York Plaza
  38th Floor
  New York
  NY
  10004
  72274
  4193149.57
  34934957
  07/27/2023
  NYSE
  Common
  07/27/2023
  Exercise of options under a registered plan
  Issuer
  N
  72274
  07/27/2023
  Cash
  N
  JOHN HOLMES
  1100 N WOOD DALE RD
  WOOD DALE
  IL
  60191
  Common
  07/26/2023
  7726
  451261.75
  This Form 144 is being filed for the cashless exercise of options and subsequent sales of the underlying shares commencing on 7/27/2023.
  07/27/2023
  /s/ John McClain Holmes III