Yep, I received a letter from Agusta a while back about the #2 Pressure Filter. In the letter they say that as long as the Return Filter is OK, then keep flying. Just reset the Pressure Filter next time it lands (and probably every landing after that!) This has been an ongoing issue for 2 1/2 years that I know of. Initialy we were told it was pressure pulses from the two pumps hitting the filter, and that the filter was too fine, and that the pop-out was too sensitve. A coarser filter and an improved pop-out indicator are supposedly on the way sometime, but I can't get a time frame out of them
I think they are more concerned with increasing the Gross Weight just now, and sorting this sort of thing out later.
As an aside, we did figure out how to tell if the Pressure Filter really is blocked, as opposed to a false indication. The undercarriage will take a loooooong time to cycle (like about 40 seconds!!).
About time Agusta sorted this one out!!