Originally Posted by
itsnotthatbloodyhard
Almost. Because the chart’s based on ISA deviation rather than raw temperature, you’re looking at around ISA-20C (actually -19 for the elevation there, but near enough), so 3.1 degrees becomes 3.3. The airfield temperature would have to have been -25C (ISA-40) for 3.5 degrees to be correct.
Thanks....shows the importance of reading carefully as I missed that.
I wonder if the 0.2 degree difference between this chart and what was actually used correspond with the flight path error.
The report seems to be careful to say that the correction they made was in accordance with company procedures(which were different from Airbus procedures but approved by the regulator) but they do not say if these procedures were accurate.