Giuliano Arruda

Hi everyone Yesterday a serious problem began to happen in my A300-600, as soon I touched the ground, the throttle levers moved to TO/GA position by itself and stayed there locked being impossible to reduce the speed in the runway, making the airplane accelarate until it goes out of the runway. I didn't modify anything beteewn a flight to another, no updates, etc, it is simply started to happen sundelly. This problem repeated by the next three flights I made. Is anyone facing the same problem? If yes, could you please inform the solution? Thanks in advance for your support, I'm looking forward to reading your comments. Giuliano Arruda