Hello, after the Hotfixes I notice that during climb ops in both VNAV & LNAV,the plane tends to rock up and down(oscilating) constantly, I suppose to keep the required climb speed? Anyone having this problem as well? I have loaded the plane via fmc as required. I did have this problem before the Hotfix! Another question to PMDG staff - If I do uninstall the NGX, or format, and reinstall, do I need to use the same activation code sent via e-mail after purchase? If not what am I to do in this scenario? THANKS pilatus

This happened to me once when I loaded a saved flight/situation.....FL360, level flight, FSX weather settings per the Introduction manual. It lasted approximately 1-2 minutes, then things were back to normal. Zach

Never get this in the climb. However, do get a slight porpoising in VNAV descent occasionally.

Thanks, will take your advice.