Did you click through the blogspam and read the original article?

> I was contracted to test the systems on a Boeing 747. They had added a new video system that ran over IP. They segregated this from the control systems using layer 2 - VLANs. We managed to break the VLANs and access other systems and with source routing could access the Engine management systems.

Perhaps there's nothing critical running Solaris, but apparently the critical systems are accessible from the systems running Solaris.