Thanks rudderrudderat.
So am i right to say that the idea of the start envelope is only to make sure your Alt/speed is within ANY of the shaded area (since once you in any of the shaded area and regardless of the N2 %, the actions are the same. Turn on the X bleed , turn off the wing a ice, and eng master switch on and let fadec decides whether to open the start valve or not) ?
Thanks once again
