The hydralic popp out is something we have every fligth on sys nr 2. And I couldnt say its related to temperature, we fly around +2 -2C so not so high or low temp, but popp out comes out around 10-15 min fligth. We have even checked during fligth from hyd main page when the filter close and bypass opens. Agusta explained that they are working on new oil filter. So till then lets wait and see.