overthewing
If you descend with a blocked pitot then the aircraft will rapidly exceed Vne, unless the pilots fly 'attitude'. The reason for this is that the pitot pressure remains the same whereas the static pressure increases, causing underreading of the speed. I have tried this on the simulator, descending with a constant IAS (not all simulators have this function), and Vne was exceeded after about 5000ft.
Conversely if the aircraft climbs at constant speed with a blocked pitot then it will stall unless attitude flying is used.
Dave