Originally Posted by
tcasblue
The published descent angle was almost 3.1 degrees with a temperature of -5C. Yet they chose to use an FPA of 3.5 which the report says was in agreement with the company procedures(which were different than Airbus procedures). But it seems like the chart published on this thread(which is not in my QRH) shows that one might use 3.2 degrees. I this correct.
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.