Originally Posted by
Icarus2001
However, my understanding is that in the event of an engine failure under flex conditions, no additional thrust is required, the calculations are good for flex OEI.
You don't understand how FLEX works by the sound of it.
You are correct, you can climb out OEI without the need to add thrust. IF you inserted the correct FLEX temp in the FMGC in the first place.
There's a big difference in power over a 10 degree FLEX range.
morno