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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,
 JOhlAbpCaNUVgh/uhzJiWu8sqOkFTJrh5zf9clGByjM/vB6ijkrPyxvHg/dcQ53+
 oswvqK75kXjpFYhe0r5kxw==

<SEC-DOCUMENT>0001179110-05-016656.txt : 20050818
<SEC-HEADER>0001179110-05-016656.hdr.sgml : 20050818
<ACCEPTANCE-DATETIME>20050818174218
ACCESSION NUMBER:		0001179110-05-016656
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050817
FILED AS OF DATE:		20050818
DATE AS OF CHANGE:		20050818

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PRECISION CASTPARTS CORP
		CENTRAL INDEX KEY:			0000079958
		STANDARD INDUSTRIAL CLASSIFICATION:	IRON & STEEL FOUNDRIES [3320]
		IRS NUMBER:				930460598
		STATE OF INCORPORATION:			OR
		FISCAL YEAR END:			0328

	BUSINESS ADDRESS:	
		STREET 1:		4650 SW MACADAM AVE
		STREET 2:		STE 440
		CITY:			PORTLAND
		STATE:			OR
		ZIP:			97239
		BUSINESS PHONE:		503.417.4800

	MAIL ADDRESS:	
		STREET 1:		4650 SW MACADAM AVE
		STREET 2:		STE 440
		CITY:			PORTLAND
		STATE:			OR
		ZIP:			97239

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			POND BYRON O
		CENTRAL INDEX KEY:			0001067689
		STANDARD INDUSTRIAL CLASSIFICATION:	TIRES AND INNER TUBES [3011]
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-10348
		FILM NUMBER:		051036659

	BUSINESS ADDRESS:	
		STREET 1:		LIMA & WESTERN AVENUES
		STREET 2:		C/O COOPER TIRE & RUBBER CO
		CITY:			FINDLAY
		STATE:			OH
		ZIP:			45840
		BUSINESS PHONE:		4194231321

	MAIL ADDRESS:	
		STREET 1:		C/O COOPER TIRE & RUBBER COMPANY
		STREET 2:		LIMA & WESTERN AVENUES
		CITY:			FINDLAY
		STATE:			OH
		ZIP:			45868
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-08-17</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000079958</issuerCik>
        <issuerName>PRECISION CASTPARTS CORP</issuerName>
        <issuerTradingSymbol>PCP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001067689</rptOwnerCik>
            <rptOwnerName>POND BYRON O</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>PRECISION CASTPARTS CORP.</rptOwnerStreet1>
            <rptOwnerStreet2>4650 S.W. MACADAM</rptOwnerStreet2>
            <rptOwnerCity>PORTLAND</rptOwnerCity>
            <rptOwnerState>OR</rptOwnerState>
            <rptOwnerZipCode>97239</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-08-17</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>546.5</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>91.5</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>10491.1473</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>POA:  Geoffrey A. Hawkes</signatureName>
        <signatureDate>2005-08-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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