It would be nice to add new section like "Reverting your JBoss EAP server installation offline using the jboss-eap-installation-manager" to Chapter 3 in "Updating Red Hat JBoss Enterprise Application Platform".
This can be executed the following command.

$ bin/jboss-eap-installation-manager.sh revert perform --revision cfdf6fed --repositories mrrc::file:/home/iwalker/Sandbox/jboss-eap-8/jboss-eap-8.0.1.GA-maven-repository/maven-repository --offline