Maintenance Packs Info

How to check for interim packs, APARs covered in installated Fix Packs or Refresh Packs?
WAS_INST_ROOT/properties/version/update/backup
This the place holder for all the fix packs, interim fix packs if u have install them seperately, refresh packs and so on.
Here you see the following files along with .pak files
update.status.xml
maintenanceStack.xml
maintenanceHistory.xml
If you are looking for a specific APAR, The best way to do it is
grep for that apar in this file maintenanceHistory.xml.
maintenanceStack.xml lists all the apars.