Hi Brian and thank you for the reply, it is switch two that won't move, so maybe I'm good. Since I posted here I uninstalled and reinstalled the aircraft but it didn't help. I may have a look at other DC-10s as I like it and the L-1011. I'm not a pilot but did fly a lot in the 70s and 80s many times aboard one of the above aircraft. Again many thanks, Blair...