The fact that it happens especially when using AS is that along with FSUIPC it has a better way then others of simulating icing conditions..but the problem here is that probably the pitot heat is not working or it is hooked with the ani-ice system. Regards,Bjorn

I don't have AS and it clearly happened to me...

Have you tried the de-icing solution suggested above? This condition could happen if de-icing is not used reguardless of having AS.George

AND...If the anti-ice systems in the NG bird don't work, TRY using FS pitot heat command!I bet that helps!Tero

Hello,Could it be that you did not have the 'Probe Heat' on? They could have frozen over, there for started to give the wrong speeds.Kind RegardsKimberly. :-outta

Hi Kimberly,The problem here is that the probe heat is on! Probably it's not working as it should or it's wrongly hooked to the anti-ice system for the engines and wing. Because when this happened to me I managed to get the IAs reading on the PFD back to normal by turning on the anti-ice, but probe heat was already on.Ciao,Bjorn

I don't have or use AS and it has happened to me. I've just gone ahead and turned off icing in both the FS2002 weather menu and in FSUIPC and that does the trick. This was happening to me with probe heat on, windshield heat on, engine and wing anti-ice on, the works, and I still was getting erroneous airspeed everytime I encountered a cloud at FL350...Best regardsBill

Gents-known issue, thanks!

Gents & Lady!!!!Warm RegardsKimberly. :-outta

This issue does not appear to have been addressed in SU2. Probe Heat / EAI and WAI all enabled - still getting pitot "frost over" effects. I don't think the Probe Heat switches are actually turning Pitot Heat on in the sim.Jason Barlow

All:I agree with Jason. I am still getting this issue in SU2 with all anti-icing equipment enabled. It only occurs when in the clouds, so this leads me to believe that it is indeed an pitot tube icing issue.I am going to turn on Pitot Heat in my default situation and save it. Then, when I switch to the PMDG 737, maybe the heat will still be on. I tend to agree the gentlemen's comment above that the PMDG Probe Heat may not be linked to the FS9 Pitot Heat.James

Hi all,Hopefully this will help a bit...FS2004's PITOT heat DOES work. The problem is with the new FS9 weather engine and its ICING system. There are 5 levels of possible ice (None to severe, or 0 to 4). Any time the level is above 1, the PITOT heat will not keep the pitot system clear of ice. In addition, the logic for DEICE is wrong, and using DEICE will decrease the chance of pitot tube blockage (strange, yes!).What we did in AS2004 to solve this is reduce all normal icing events to level 1 (Freezing Rain and Thunderstorms can be up to level 4). Occasionally, even this 1 setting can cause the pitot to become blocked, but only for very short periods (i.e. 1-10 seconds), and only when you've been sitting in the ice longer than a few minutes.In FSUIPC, the "random icing in clouds" option (default I believe) will set random icing in all cloud layers (regardless of temps), from 0 to 4 setting. This means there is over a 50% chance that you're going to get pitot-blocking ice in any cloud. Thus, it is HIGHLY recommended to disable this FSUIPC feature.Hope this helps...-Damian