-----BEGIN PRIVACY-ENHANCED MESSAGE-----
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,
 NKrxYpd5yFR+FzeufNYVcW3hjji6oy9yi3Lu3v6ikBh+/swNN9GrEZHUPevX5J3p
 6APbhCcWy1ftB/z/2LsiGg==

<SEC-DOCUMENT>0001181431-03-027868.txt : 20031029
<SEC-HEADER>0001181431-03-027868.hdr.sgml : 20031029
<ACCEPTANCE-DATETIME>20031029132302
ACCESSION NUMBER:		0001181431-03-027868
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20011207
FILED AS OF DATE:		20031029

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AMERICAN PACIFIC CORP
		CENTRAL INDEX KEY:			0000350832
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INORGANIC CHEMICALS [2810]
		IRS NUMBER:				596490478
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		3770 HOWARD HUGHES PKWY STE 300
		CITY:			LAS VEGAS
		STATE:			NV
		ZIP:			89109
		BUSINESS PHONE:		7027352200

	MAIL ADDRESS:	
		STREET 1:		3770 HOWARD HUGHES PKWY STE 300
		STREET 2:		3770 HOWARD HUGHES PKWY STE 300
		CITY:			LAS VEGAS
		STATE:			NV
		ZIP:			89109

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			KEYS DAVID N
		CENTRAL INDEX KEY:			0001267667

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-08137
		FILM NUMBER:		03962973

	BUSINESS ADDRESS:	
		STREET 1:		3770 HOWARD HUGHES PARKWAY
		STREET 2:		SUITE 300
		CITY:			LAS VEGAS
		STATE:			NV
		ZIP:			89109
		BUSINESS PHONE:		702-735-2200

	MAIL ADDRESS:	
		STREET 1:		3770 HOWARD HUGHES PARKWAY
		STREET 2:		STE 300
		CITY:			LAS VEGAS
		STATE:			NV
		ZIP:			89109
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>rrd21004.xml
<DESCRIPTION>DECEMBER 2001 AMENDMENT
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4/A</documentType><periodOfReport>2001-12-07</periodOfReport><dateOfOriginalSubmission>2002-01-08</dateOfOriginalSubmission><notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000350832</issuerCik>
        <issuerName>AMERICAN PACIFIC CORP</issuerName>
        <issuerTradingSymbol>apfc</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001267667</rptOwnerCik>
            <rptOwnerName>KEYS DAVID N</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3770 HOWARD HUGHES PARKWAY</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 300</rptOwnerStreet2>
            <rptOwnerCity>LAS VEGAS</rptOwnerCity>
            <rptOwnerState>NV</rptOwnerState>
            <rptOwnerZipCode>89109</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>EVP, CFO, Treasurer &amp; Sec'y</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2001-12-07</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>M</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>20000</value></transactionShares><transactionPricePerShare><value>6.375</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>27000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></
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ctionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>5000</value></transactionShares><transactionPricePerShare><value>7.40</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>12000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2001-12-07</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><v
alue>5000</value></transactionShares><transactionPricePerShare><value>7.28</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>7000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeHolding><securityTitle><value>Common Stock</value></securityTitle><postTransactionAmounts><sharesOwnedFollowingTransaction><value>2166</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>See footnote.</value><footnoteId id="F1"/></natureOfOwnership></ownershipNature></nonDerivativeHolding></nonDerivativeTable><derivativeTable><derivativeTransaction><securityTitle><value>Options to Purchase</value>
</securityTitle><conversionOrExercisePrice><value>6.375</value></conversionOrExercisePrice><transactionDate><value>2001-12-07</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>X</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>20000</value><footnoteId id="F2"/></transactionShares><transactionPricePerShare><footnoteId id="F3"/></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>1996-12-30</value></exerciseDate><expirationDate><value>2001-12-30</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>20000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>0</value></sharesOwnedFollowingTransaction></postTransactionAmoun
ts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction><derivativeHolding><securityTitle><value>Options to Purchase</value></securityTitle><conversionOrExercisePrice><value>6.375</value></conversionOrExercisePrice><exerciseDate><value>1997-12-30</value></exerciseDate><expirationDate><value>2002-12-30</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>20000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>20000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Options to Purchase</value></securityTitle><conversionOrExercisePrice><value>7.125</value></conversionOrExercisePrice><exerc
iseDate><value>1997-07-08</value></exerciseDate><expirationDate><value>2002-07-08</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>20000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>20000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Options to Purchase</value></securityTitle><conversionOrExercisePrice><value>7.125</value></conversionOrExercisePrice><exerciseDate><value>1998-07-08</value></exerciseDate><expirationDate><value>2003-07-08</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>20000</value></underlyingSecurityShares></underlyingSecurity>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>20000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Options to Purchase</value></securityTitle><conversionOrExercisePrice><value>7.125</value></conversionOrExercisePrice><exerciseDate><value>1999-07-08</value></exerciseDate><expirationDate><value>2004-07-08</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>20000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>20000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><v
alue>Options to Purchase</value></securityTitle><conversionOrExercisePrice><value>7.125</value></conversionOrExercisePrice><exerciseDate><value>2000-07-08</value></exerciseDate><expirationDate><value>2005-07-08</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>20000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>20000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Options to Purchase</value></securityTitle><conversionOrExercisePrice><value>7.781</value></conversionOrExercisePrice><exerciseDate><value>1999-09-14</value></exerciseDate><expirationDate><value>2004-09-14</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stoc
k</value></underlyingSecurityTitle><underlyingSecurityShares><value>17000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>17000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Options to Purchase</value></securityTitle><conversionOrExercisePrice><value>7.781</value></conversionOrExercisePrice><exerciseDate><value>2000-09-14</value></exerciseDate><expirationDate><value>2005-09-14</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>17000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>17000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirec
tOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Options to Purchase</value></securityTitle><conversionOrExercisePrice><value>4.87</value></conversionOrExercisePrice><exerciseDate><value>2001-04-24</value></exerciseDate><expirationDate><value>2011-04-24</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>22500</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>22500</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Options to Purchase</value></securityTitle><conversionOrExercisePrice><value>4.87</value></conversionOrExercisePrice><exerciseDate><value>2002-04-24</value></exercis
eDate><expirationDate><value>2011-04-24</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>22500</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>22500</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding></derivativeTable><footnotes><footnote id="F1">For the benefit of the Reporting Person.  Shares are held by an Institutional Fiduciary in the American Pacific Corporation Qualified Section 401(k) Plan.</footnote><footnote id="F2">This Form 4 is being amended to correct Table II, Column 5, Line 1, from Acquired (A) to Disposed of (D). Certain other amendments have been also been made to revise or complete disclosure in Item 1 on Page 1, Columns 5 and 6 of Table I, and Columns 7, 8 and 9 of Table II.</
footnote><footnote id="F3">Omitted in accordance with General Instructions for Form 4, Rule 4(c)(iii).</footnote></footnotes><ownerSignature><signatureName>David N. Keys</signatureName><signatureDate>2003-10-29</signatureDate></ownerSignature></ownershipDocument>



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</DOCUMENT>
</SEC-DOCUMENT>
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