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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 V70kmcjbpX4gM/kAORJoF5NlfM9PWKsiU/gWjT5WdKh/B6XhL1ESTaAX2jqnxSDu
 RmqNc4E5Y1QD5G9389BWXw==

<SEC-DOCUMENT>0000001750-03-000062.txt : 20031016
<SEC-HEADER>0000001750-03-000062.hdr.sgml : 20031016
<ACCEPTANCE-DATETIME>20031016183422
ACCESSION NUMBER:		0000001750-03-000062
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031008
FILED AS OF DATE:		20031016

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MCDONALD JAMES M
		CENTRAL INDEX KEY:			0001267325

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-06263
		FILM NUMBER:		03944644

	MAIL ADDRESS:	
		STREET 1:		1100 N WOOD DALE RD
		CITY:			WOODDALE
		STATE:			IL
		ZIP:			60191

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AAR CORP
		CENTRAL INDEX KEY:			0000001750
		STANDARD INDUSTRIAL CLASSIFICATION:	AIRCRAFT & PARTS [3720]
		IRS NUMBER:				362334820
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0531

	BUSINESS ADDRESS:	
		STREET 1:		1100 N WOOD DALE RD
		CITY:			WOOD DALE
		STATE:			IL
		ZIP:			60191
		BUSINESS PHONE:		6302272000

	MAIL ADDRESS:	
		STREET 1:		1100 N WOOD DALE RD
		CITY:			WOOD DALE
		STATE:			IL
		ZIP:			60191

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ALLEN AIRCRAFT RADIO INC
		DATE OF NAME CHANGE:	19700204
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>c0001267325d20031016f3f.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
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<ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>3</documentType><periodOfReport>2003-10-08</periodOfReport><noSecuritiesOwned>0</noSecuritiesOwned><issuer><issuerCik>0000001750</issuerCik><issuerName>AAR CORP</issuerName>        <issuerTradingSymbol>AIR</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001267325</rptOwnerCik><rptOwnerName>MCDONALD JAMES M</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>1100 N. WOOD DALE ROAD</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>WOOD DALE</rptOwnerCity><rptOwnerState>IL</rptOwnerState><rptOwnerZipCode>60191-</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>Vice President</officerTitle><otherText></otherText></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonD
erivativeHolding><securityTitle><value>Common Stock</value></securityTitle><postTransactionAmounts><sharesOwnedFollowingTransaction><value>2060</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></nonDerivativeHolding></nonDerivativeTable><derivativeTable><derivativeHolding><securityTitle><value>Stock Option</value></securityTitle><conversionOrExercisePrice><value>3.2</value><footnoteId id="F1"/></conversionOrExercisePrice><exerciseDate><value>2002-10-09</value><footnoteId id="F2"/></exerciseDate><expirationDate><value>2012-10-09</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>5000</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOf
Ownership><value></value></natureOfOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Stock Option</value></securityTitle><conversionOrExercisePrice><value>8.59</value><footnoteId id="F1"/></conversionOrExercisePrice><exerciseDate><value>2002-07-09</value><footnoteId id="F3"/></exerciseDate><expirationDate><value>2012-07-09</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>9000</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Stock Option</value></securityTitle><conversionOrExercisePrice><value>8.59</value><footnoteId id="F1"/></conversionOrExercisePrice><exerciseDate><value>2002-07-09</value><footnoteId id="F4"/></exerciseDate><expirationDate><
value>2012-07-09</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>1800</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Stock Option</value></securityTitle><conversionOrExercisePrice><value>13.4375</value><footnoteId id="F1"/></conversionOrExercisePrice><exerciseDate><value>2000-07-11</value><footnoteId id="F5"/></exerciseDate><expirationDate><value>2010-07-11</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>7500</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><valu
e></value></natureOfOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Stock Option</value></securityTitle><conversionOrExercisePrice><value>14.9</value><footnoteId id="F1"/></conversionOrExercisePrice><exerciseDate><value>2001-07-10</value><footnoteId id="F6"/></exerciseDate><expirationDate><value>2011-07-10</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>5000</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Stock Option</value></securityTitle><conversionOrExercisePrice><value>16.0834</value><footnoteId id="F1"/></conversionOrExercisePrice><exerciseDate><value>1996-10-09</value></exerciseDate><expirationDate><value>2006-10-09</value></expirat
ionDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>3000</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Stock Option</value></securityTitle><conversionOrExercisePrice><value>17.75</value><footnoteId id="F1"/></conversionOrExercisePrice><exerciseDate><value>1998-10-14</value></exerciseDate><expirationDate><value>2008-10-14</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>4000</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></deriva
tiveHolding><derivativeHolding><securityTitle><value>Stock Option</value></securityTitle><conversionOrExercisePrice><value>22.625</value><footnoteId id="F1"/></conversionOrExercisePrice><exerciseDate><value>1999-07-13</value><footnoteId id="F7"/></exerciseDate><expirationDate><value>2009-07-13</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>6000</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Stock Option</value></securityTitle><conversionOrExercisePrice><value>23.0834</value><footnoteId id="F1"/></conversionOrExercisePrice><exerciseDate><value>1997-10-08</value></exerciseDate><expirationDate><value>2007-10-08</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><
value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>3750</value></underlyingSecurityShares></underlyingSecurity><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeHolding></derivativeTable><footnotes><footnote id="F1">Grantee may elect to pay the exercise price of the option or any tax withholding obligation in connection therewith by directing the Company to withhold a portion of the shares otherwise distributable to the grantee upon exercise or by transferring to the Company previously acquired shares, valued at their fair market value on such taxable date.</footnote><footnote id="F2">The option vests in five equal installments beginning on October 9, 2003.</footnote><footnote id="F3">20% of grant shares exercisable upon the first to occur of (i) the date the average share price equals or exceeds a 10% increase in share value (subject to a minimum vesting
 waiting period of 6 months from date of grant), or (ii) next grant anniversary date.</footnote><footnote id="F4">Shares become exercisable upon the first to occur of (i) the date the rolling 20-day average NYSE closing price equals or exceeds $10.74 (subject to a minimum vesting waiting period of 6 months from date of grant), and (ii) July 9, 2009.</footnote><footnote id="F5">The option vests in five equal installments beginning on July 11, 2001.</footnote><footnote id="F6">The option vests in five equal installments beginning on July 10, 2002.</footnote><footnote id="F7">The option vests in five equal installments beginning on July 13, 2000.</footnote></footnotes><ownerSignature><signatureName>Jo-Ellen Kiddie, Power of Attorney</signatureName><signatureDate>2003-10-16</signatureDate></ownerSignature></ownershipDocument>

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