Originally Posted by
Um... lifting...
Untrue. Opening the sliding doors on the AW139 blocks no windows. The doors slide aft, the first row windows are forward of the doors, which contain the second & third row windows. It is true that the doors can't be jettisoned.
That is true but only if the airframe maintains it's correct shape. After a heavy landing, there is a very real chance that the cabin shape might be distorted thereby the doors might only open part-way. Hence trapping the occupants in the rear row.
This is why the only approved emergency exits in an AW139 are the windows, both up front and down the back.