Same as above regarding bypass and servo indications. However have still been troubled with servo CAS messages after heavy rain, high humidity even with the new servo switches.
We have had a total loss of pressure on the number 1 system if my memory serves me correct. Pump made lots of scary noises from what I gather. System was isolated before pump had chance to overheat and scary noises stopped as there was still enough fluid trapped in that part of the system. Did not overheat after system had been isolated. Aircraft landed safely with no problems on the No2 system.
In addition to this we have had one instance of the No4 pump losing pressure early on shutdown. During further investigation it was found that it was actually the No 2 pump that was losing pressure early as the No 4 sensor was actually routed to the No 2 pump and vice versa. This routing was found to be the same on all of our aircraft. Maybe thats an Italian thing???
Hope this helps.