@ 02.06.54 the crew observe the SAT as -42°C
@ 02.10.00 (Interim report July11 page 86) SAT -38.8
Thanks for these times Rudder. So using these data points, TAT was increasing at the rate of 1 degree per minute. Similar to the rate of increase with routine descent. You would expect the climate control to cope with this without the cockpit becoming uncomfortably warm.
So why did PF note at 2.08.47 that
"You can feel already that it’s a lot hotter"
And why did PNF agree at 2.09.20 that
"It’s amazing how hot it is all of a sudden"
It certainly doesn't sound normal or routine.
In fact, the increased temp is pretty much the last thing that PF and PNF ever agreed on.