<?xml version="1.0"?>
<notificationOfRemoval>

    <schemaVersion>X0203</schemaVersion>

    <exchange>
        <cik>0000876882</cik>
        <entityName>NYSE CHICAGO, INC.</entityName>
    </exchange>

    <issuer>
        <cik>0000001750</cik>
        <entityName>AAR CORP</entityName>
        <fileNumber>001-06263</fileNumber>
        <address>
            <street1>1100 N. Wood Dale Road</street1>
            <city>Wood Dale</city>
            <stateOrCountryCode>IL</stateOrCountryCode>
            <stateOrCountry>ILLINOIS</stateOrCountry>
            <zipCode>60191</zipCode>
        </address>
        <telephoneNumber>(630) 227-2000</telephoneNumber>
    </issuer>

    <descriptionClassSecurity>Preferred Stock Purchase Rights</descriptionClassSecurity>

    <ruleProvision>17 CFR 240.12d2-2(a)(4)</ruleProvision>

    <signatureData>
        <signatureName>Christopher Rances</signatureName>
        <signatureTitle>Senior Analyst</signatureTitle>
        <signatureDate>2020-10-06</signatureDate>
    </signatureData>
</notificationOfRemoval>
