Comments by "Stephen Villano" (@spvillano) on "NBC News"
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@smcdonald9991 just corporate muddying the water. Proximity to the jet stream is associated with clear air turbulence and if the pilot wasn't monitoring temperatures and immediately changing course away from the wind shears induced by the jet stream, they would end up in court being sued by passengers.
There are two causes for such effects, neither mechanical. Clear air turbulence and there is a jet stream along their flight path or the aircraft exceeded its maximum allowed Mach number, both entering into the realm quite deeply for negligence. Control surfaces won't move the aircraft that quickly, too large a surface area change for the equipment to manage.
If a pilot observes CAT, the pilot is supposed to check the air temperature gauges and move out of the temperature differential zone, thereby clearing the turbulence.
Exceeding Mach, that's a major risk to the airframe and passengers and exclusively pilot negligence. Passenger aircraft aren't designed to reach Mach 1, they typically operate around 0.85 - 0.9 Mach. The flight recorders will tell the tale. A big tell is when the cockpit voice recorder gets "accidentally" overwritten after landing. In flight, yeah, that can happen, on the ground, more often than not it eventually comes out that the flight crew intentionally left it on after shutdown to ensure incriminating contents are "lost".
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