I am using my PMDG 744 very often and do loads of flights with it.
Yesterday I did a nice flight from VHHH back to EDDF and everything went just fine.
I left home for 3 hours or so, then when I came back home I wanted to do another PMDG 744 flight. So, I set up the passengers and fuel and cargo and entered the cockpit.
I prepared the aircraft as usual, like I do everytime. Programmed the FMC and then taxied to the runway.
Take off, lift off, gear up! LNAV VNAV engage and I flew manually up to about 1500 feet, then I engaged the Center Autopilot and then the trouble begins!
The autopilot followed the LNAV track BUT not the VNAV path... It just continued to pitch up to 30° nose up!!! So I disengaged the A/P and corrected it myself and then reengaged the A/P! Same result! Pitch up to 25°! Same happens when I use different pitch modes like LVL CHG or V/S... Always pitching up right into the stall...
I removed PMDG744 from my HDD and reinstalled it... Same problem! Nothin has changed... I dont know whats going on...
I cannot use PMDG anymore at the moment! I am not flying EDDF-KSFO manually all the time...
Anyone knows what was going on here?
Aircraft is within CG limits and operational limits!