Originally Posted by
El Bunto
I remember there was discussion of jetstreams mixing above Kennedy that day, and that the SRB gimbals were working hard to steer the stack as a result.
I recall thinking when watching and listening to the endless replays, that there was a high probability that the references to SRB gimbal activity between the crew and mission control may have been erroneously ascribed to wind-shear, when (unknown to both at the time) they were largely caused by the ever increasing breach in the wall of the RH SRB causing asymmetric loss of thrust in that booster's nozzle, let alone thrust from the developing plume at almost a right angle to the normal thrust line and causing the SRB gimbals to work hard to steer the stack, rather than jetstream mixing and upper level winds that were described as high but within limits.