Yesterday I started having a problem with my gound speed on the 767 or 777 which uses the same cockpit. I am parked at the terminal, sitting still, and my speed indicator is going from 0 to 1 2 3 4 5 6 and then dowm to 0. 1 2 3 4 5 6 and then down to zero. What is the world is going on? The only thing I have done lately is install RC3 but it did not do that on the other planes. The 767 and 777 I am using are POSKY. Any help would be appreciated because I am getting dizzy!Denny ONashville, TN

If its airspeed indicator you mean, it could be gusting wind??