Re: 49 degrees oat. Does it still happen that the actual temerature is above 50 degrees, but the official temperature is kept at 49? There seems to be a local law, stating that on days with 50+ degrees, all manual labor is halted. So they warp reality and officially keep it at 49.
Of course engines at go-around thrust don't listen to this artificial temp. They perform according to actual ambient conditions.