Hi everone!A couple of weeks ago my PMDG 747-400 started to act very strange just moments after takeoff.All the cockpit preparations, startup and taxi procedures is performed just the way as I always do.After takeoff, during the climb the aircraft starts to climb very rapidly ( sometimes above 10.000 feet/min ) and as a result the speed drops, after a while the speed increases again and the aircraft starts to descend. And so it goes on, up and down, up and down.Also having trouble with the HDG select, after arming heading select the aircraft starts to bank very hard, which of course activates the bank angle warning. And sometimes it does

Patrik,I've seen this before and it can be rectified with a uninstall/reinstall of the 744.Hope it helps,