"Question: Why does the descent have to be at max speed ? Why risk a structural overspeed instead of a low-speed stall ? Surely the RoD is more important to get down to 10,000' asap ?
e.g. A320 QRH Emer Descent : "Descend at the max appropriate speed."
e.g. B737NG FCTM Rapid Descent : "Target speed MMO/VMO".
Explanation appreciated. "
For the safety of the humans on board. rapid decompression at high altitudes can cause DCS (also known as the bends). Have to get down asap to get that nitrogen back into solution in the blood. plus, it might be a bit chilly.