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Guest Jamesrw2002

possible gripe... need some insight on this one... heh

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Guest Jamesrw2002

I've been flying FS since FS5.0a heh... and I have NEVER had this happen to me... on a long haul flight from KBOS-EDDF in the PSS 777-300 I lost Indicated Airspeed at 5000 feet and 30nm out of EDDF. Weather was broken at 4 with tops around 7500 so I was going through them. Suddenly Airspeed just dropped to nil, I got airspeed alerts, and autothrottles tried to to max the throttles out.. kinda freaked me out.. but realized I wasnt falling out of the sky as GS was reading fine. so I continued my flight and approach with TAS and GS reading. I dont have any failures on in FS to my knowledge... does this just sound like a glitch?also.. are PITOT heaters automatic on the 777? I havent been able to find a switch for one so I'm assuming so.Thanks a bunchJames

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Hi JamesI also had this problem, and a deeper search in the forum came up with this previous post and it worked for me.This is a cut and paste from a previous poster named MattHi, I've enjoyed flying this acft during the past few weeks. Well done PSS. I've had problems with pitot icing. It's the usual pitot icing symptom - a sudden drop off to zero of the airspeed indicator, followed by spooling up of the engines by the autothrottle trying to compensate. I've not been able to find a toggle, button or anything else to stop the pitots icing up and whenever it happens I use SHIFT-H (PITOT HEAT ON) and it clears within seconds. Am I not seeing an obvious button or is the automatic pitot heating not working?kind regardsMattSo thanks Matt for a solutionregardsJohn CallejaBAW352


John Calleja

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Guest Jamesrw2002

Wow thanks, It never really even dawned on me to try SHIFT-H...Thanks a bunch :)James

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I thought that anti icing functions in the glass cockpit era were automatic, or is this something else that needs to be addressed in the patch?Ron


Ron Service

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Guest NormanB

I've been in known icing conditions in the 777 a number of times and not seen this. I will however check and if need flag it up for the gauge guys.

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I think it is an FS problem, I had my airspeed drop to 0 too, but with the CLS A300-600 in icing coditions.

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Guest FlyinJ

James,Make sure the Wing and Engine Anti-Ice switches on the overhead panel are set to "Auto" so that when icing conditions are present, the Anti-Ice system automatically comes on. Although I haven't tried a flight without them in that position, I imagine if they are in the "Off" position, you may encounter what you described.Jeff

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Guest Jamesrw2002

everything was in Auto or On :) Always is :)James

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Guest t288msd

Norman, Just for info. I, too, get this problem every now and then. It just happened now. At a low cruise level over some towering cumulus and suddenly the IAS drops to zero and the warnings start sounding. I pressed SHIFT+H and all is well within seconds. Works a treat every time, but shouldn't be required. Leave it with you.Matt D

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Guest NormanB

Thanks Matt. I will pass it back to the devs.

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