The vast majority of air accidents wouldn’t actually benefit from a parachute assembly anyway. In a situation where an aircraft is inevitably plummeting to the ground, a parachute assembly isn’t likely to help. It’ll either not deploy properly, completely rip itself apart, or at best will violently swing the aircraft around.
Plus if you have even one engine running still, which is quite probable, your parachutes are going to be completely ineffective.
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