Back when I interviewed the first 5 questions on the tech were all related to CRJ systems (pack, AC or DC, gear, what stages does the bleed air come from, anit-ice). The largest plane I flew prior to that was a Seneca. So I was up a creek. I don't know why they would ask questions on a plane I never flew? I thought that I was supose learn the systems in ground school. Oh well, if I got the job in 06 I'd be a CA. Good luck.