Hi Damian and Jim,I got three times in a row the same small problem.Sometimes after takeoff (abot 3 to 5 minutes) and only with the active radar ON, suddenly the IAS on the PMDG 737NG goes to zero, then goes back to normal about 30 to 45 s later.I flew with the offline archives date 01JUL 12Z and 18Z.For the rest all was fine, winds, temperatures, clouds and weather.I flew KABQ-KDEN and KDEN-KJAC and back.I'm using the MR1 update.Thanks for any suggestion.

I don,t have the PMDG737 but make sure you have the pitot heat turned on. keith

Hi keith,first thing I checked !It is one of the before taxi checklist items and I double check it as an additional measure before lining up the runway at take off...Thanks for the suggestion.

I have this happen all the time; in any aircraft as well. I've learned to just watch for it and take control from the AP if it happens and wait it out. Someone mentioned to me that MSFS is extremely poor at representing icing conditions. As a fix he mentioned to enable any icing restrictions in AS or FSUIPC. I decided to turn all icing off. I hate the fact that I'm limiting the realism. However, I've had it happen when my TAT and OAT were well above freezing and I don't consider that to be real (maybe I'm wrong thouhg).

Hi,See also if there is an anti-icing option also.Hope this helps,JimActiveSky Supporthttp://www.hifisim.com/images/as2004proudsupporter.jpg

I read somewhere in some forum that there is this problem with icing in fs2004. I'll try to disable icing in AS2004 options, 'cause I've just the unregistered version of FSUIPC.For what I got, it was just annoying, lasted a very short time and the AT seemed not to notice it...For Jim: last week I got very strange behaviours with AS2004 (I posted a long thread), this week with MR1 was OK (except for the IAS going to zero, but that seems to be a FS2004 bug), thanks !

OK, thanks for your feedback!Hope this helps,JimActiveSky Supporthttp://www.hifisim.com/images/as2004proudsupporter.jpg

So you know, this happens on a fairly regular basis when I fly, PMDG or not (but it happens mostly with the PMDG since that's what I fly most).On my PMDG, it doesn't affect the AP at all - it's just continuing as if nothing happened while the speed tape decides to read the speed again. Pitot or icing do not seem to do a whole lot.It may have to do with weather updates - I can't remember seeing it happen with MR2 RC. Perhaps the FSUIPC 3.3 may help as well.Note: The PSS just dives when this happens.

I can also confirm that this happens in my PDMG 737, why? I don't know, and cannot say that it's anything to do with AS2004.However, as other people have stated, the speed tape recovers after about 45 seconds to a minute, and the aircraft does not react to this in anyway, hence I don't worry about it.CheersGraham

Since I disabled all icing I haven't had this happen. 90% of the time my PMDG handles fine, default aircraft go nuts though, but a few times when it's happened my PMDG A/T did begin accelerating madly on an approach to try and recover. I was able to disable the A/T and then reenable when conditions returned.

In the PMDG you should turn on your wing AND engine anti-ice on in icing conditions, then you'll get your speedtape back to normal.John

Good point...but if there's no icing ?I got the IAS to zero and back to normal in +20 C and clear skies conditions, that's by no means an icing condition...

I don't think coming into LAX on approach at 5,000 on a hot summer day is exactly an icing condition...

Hi again Jim,I retried a couple of flights (KDEN-KDFW and vv.) in this weekend with MR1 (I'm waiting for the official release of the new MR2) and I noticed the following:1- first flight with no active radar active (weather fine along the route so no need of tracking/radar): all OK, except the flightwatch radio on 122.0 very very very stuttering, one word then long silence, then again one word then a long silence, even with the radio on 122.00 off...strange thing, first thing happened. Audio dirvers updated and everything working fine.2- second flight, active radar on, IAS dropping to zero at about 25000 ft climbing, all antiice ON (probe, wing and engines)...blackout of IAS for about 30-45 s then normal again...Tracking surface stations getting again always an altimeter of 29.92 inches.Any idea ?For the rest, astounding product !

Hi There,1. Turn off Hardware Acceleration in DirectX.2. For altitudes above 18000 ft. your altimeter should always be 29.92. That is standard procedure. Looks like deicing is not working. No idea why. How about in a default FS plane?Hope this helps,JimActiveSky Supporthttp://www.hifisim.com/images/as2004proudsupporter.jpg