Get patches from ibm:

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Normal:
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service.software.ibm.com/aix.us/aixfixes
service.boulder.ibm.com/aix.us/aixfixes

#lslpp -i
#instfix -ik FIX_ID
#cd /var/adm/patches/FIX_ID
#ftp service.software.ibm.com
	login: ftp
	password: username@mydomain.com
	cd aix/tools/y2k
#inutoc .
#installp -a -d . -f .toc  -c -g -X -v -V2
#instfix -ik FIX_ID

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Year 2000:
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#mkdir -p /var/adm/patches/y2k
#cd /var/adm/patches/y2k
#ftp service.software.ibm.com
	login: ftp
	password: username@mydomain.com
	ftp> cd aix/tools/y2k
	ftp> bin
	ftp> ls
	ftp> get (the latest: aixy2k_fixcheckXX, as in: aixy2k_fixcheck18 )
	ftp> quit
#chmod 755 aixy2k_fixcheckXX
#aixy2k_fixcheckXX

Note any flagged FIX_IDs

http://aix.boulder.ibm.com/aix.us/aixfixes
select os version and enter APAR FIX_ID
download files

#inutoc .
#installp -a -d . -f .toc -c -g -X -v -V2
#aixy2k_fixcheckXX