Hi there,Lateley I have been having a problem on my descent between let's say FL180 to 100.At that time my speed display is 000 and the engine spool to max, and I can't do nothing about it untill I reach FL9800 and then is dispays again and it is overspeed at 430knt, or so.I don't know what to do about it, I have a CHyoke, and I tried to disconnect and reconnect to my USB, with no luck.The problem is only at that time, all the rest is fine. It is with different ACFT, so not only 1.Any idea what can cause this to happen.Thanks for any feedback.Regards

Do you mean the indicated airspeed?Do you have pitot heat on? The pitot tube may be icing up.

Hi there,Yes you are correct the indicated airspeedI don't recall If I had it or not, but sometimes the panel just don't have the pitotheat botton. Is the pitotheat will only affect flight between FL 180 and FL9900?Thanks.

Hi,Icing can occur at any altitude, even on the ground.Use Shift/H to turn it on if if a panel does not have a switch.

Hi Jim,Thank you very much, I will do that and see what is going to happend.Thanks againRegardsHani