PSS 777 flying problem

[Agovico261 0]

Hello I have a problem with my pss777. When I change the simulation speed to 2x or more the plane goes up and down. Each second it climbs 800 ft and descends to 800 ft or more. Is there any way I can fix this

[vc10man 732]

Check your weather.

[Agovico261 0]

ok ill try that

[pschlute 37]

Some addon aircraft handle sim speed up better than others. You could try changing out of VNAV/LNAV when you want to speed up and use ALT HLD and MACH HLD instead. This helps with the PMDG aircraft.

[Luis Hernandez 568]

Check your trim against what the Excel load manager says.