A B777-200 Captain reported the repeated inability of the windshield wipers to remove water sufficiently to provide adequate visibility for takeoff; landing or ground operations. He believes the problem to be fleetwide at any time more than very light rain is encountered.

Narrative

During this 6 day ID to Asia we have experienced repeated problems with the forward windshields on the 777. They do not allow water to shed. The wipers have little or no effect. We are essentially reducing our visibility to zero. Anything other than light rain and the water seems to smear across the windows and not shear off. Takeoff; landing and taxiing. It does not matter what speed or flight regime. Looking out the window on final yesterday we saw obscured and fuzzy lights that could barely be identified as a runway. The wipers punched a hole about the size of a tin can in the water but only for a few seconds and then fills up. We are looking out the side windows and straining to see through any open corner of the front to land. Taking off in the heavy rain the water is glued to the window and does not shear making any abort or normal takeoff unusually difficult. Imagine looking underwater without the aid of goggles. That is what this looks like. I cannot make another takeoff; landing or taxi again in moderate rain without the guarantee that we can see. This is not airplane specific. It appears that this is a fleet problem.