RWA
Since no-one replied to your question, here goes:
SEC is the Spoiler Elevator Computer. Since these moving surfaces are not connected physically to the sidestick, it's the SEC which controls which surfaces will deflect, and by how much, depending on the conditions. So it's best to have lots of active SECs!
You probably worked out that yellow, green and blue are the three hydraulic sytems.
Last edited by Dysag; 6th Jun 2008 at 14:42.