Originally Posted by
lomapaseo
I don't recall any military jets falling out of the air at high altitudes. Do you suppose that air friction might be significant in limiting the metallurgical effects
likely made from different thicknesses. Might be an issue of brittleness at the thickness of a Airbus skin.
Although I suspect - as Flight Detent posted above - the reason is that at in the A320F at the limit of -70*C ventilation valves can start to play up. Seen it.