Originally Posted by
shdw
Refer to my earlier post in response to ryan1234, indicated stall speed does in fact change, for the exact reasons ryan had stated. The change is however so minimal that it is not worth mentioning or considering for any pilot, unless they are the first pilot in history that can hold +/- 2 knots anytime he/she wants.
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I agree, it is also worth mentioning that near stall at altitude it doesn't take much hamfisting of control inputs to cause a dramatic increase in stall speed.
This may have been the case here if flight data is considered.