offchocks.
They came to the conclusion that the radars were calibrated for North American CBs which are apparently wetter.
The same happened with the new modern ( sic ) radar on the 777-300ER that was introduced by SQ in 2007. The Honeywell RDR4000 had to be re-calibrated to suit the rest of the world conditions after they discovered it couldn't see shi* outside N.A.
And after 2 years using it I was not really that impressed........Give me a tilt any day thanks.