RVDT - I apologise. Having checked I see your explanation is the correct one. However, the point I was trying to make, that may be relevant to this accident, is that as a general practice when the pump cavitated pilots would switch the pump OFF and then acknowledge the caution. This would effectively mean that the pump ends up OFF and there are no immediate indications on the CAD to indicate this. Can we agree on this?
A combination of nose down followed by nose up (hovering), could prompt the pilot to carry out this action for both pumps. Now there is no transfer capability from the Main Tank to the Supply Tanks AND there are no visible indications (other than the switch position) to indicate this.
I am qualified to operate the EC135 but have no operating experience at this point. Hence my poor explanation of the pump logic. Please forgive me for this.