According to a 2011 report from the U.S. National Transportation Safety Board (NTSB), ice crystals can block the pitot probes on Airbus A330s. This can cause the airspeed indicator to give incorrect readings and reduce the operation of autoflight systems. 

When the pitot tube and drain hole become completely iced up, all pressure is trapped and the airspeed indicator freezes. This can happen whether the plane is climbing, descending, speeding up, or slowing down. 

In 2008, Air France reported problems with speed-measuring equipment on their A330 and A340 jets. In 2009, Flight AF447 of Air France went down off the coast of Brazil after frozen speedometers caused a series of computer errors. 

 

 Airbus and Air France found Not Guilty when they had years to fix this problem. 

Cost at least 228. Ruined many more family lives. 

 Flight 447 dropped like a rock 

out of the skies because of Air France and Airbus putting Money First $$$$. 

 Just last year France Courts found Airbus and AF Innocent ??  They had years 

 to fix the problems. Pitot Tubes froze over. Making Pilots think they were in a 

 stall. Computers would give out false information. Flight 447 fell from 38,000' 

feet to the Ocean in just over 4 minutes.   Airbus and Air France were to blame. 

 Ask the poor family members left behind.