fuel savings
Last winter in Phoenix our A320 did all the taxi with one engine only. I was astonished to hear the packs going off for the second engine start sequence exactly 45 seconds before TOGA comand.
I heard that one minute time is legal before applying max trust on the CFM however how sad was that little bird taxing assymetrical, how sad we would have be if the second started engine was unprepared for max trust? Is this an efficient fuel safing in USA?
is this approuved elsewhere in the world?
thanks
sp