Winter time and jet streams. SA is the biggie here, we have all had issues at times with Boeings and Airbus. To all the cynics, I have thousands of hours in both and they're both crap at anticipating the large value shear. We however are aware of it and can look at a sigwx chart. Reduce the Mach prior to or at the beginning of the climb not after it's almost too late. It depends on the size of the buffer pior to reaching buffet. The 738 is crap! Not sure about the 320.
On a separate note two things. I wonder how long before the mods shut this thread like the one into the Goldie and secondly, I hear this is the fourth occasion in the last twelve months they have had a TOGA LK or alpha prot issue. Can anyone confirm this as this is alarming if true?