Certainly not allowable 'Dispatched Open'. And if it is jammed/failed open it will put a nice kink in the leading edge 'bullnose' just immediately outboard of the outbd pylon. So as wiggy says 'bleeds off' on the affected side please ASAP!
IIRC the MEL doesn't give any crew ops. requirements except no dispatch into known icing conditions with the valve locked closed.