Originally Posted by
MD83FO
thanks for the injunctions, my train of thought is, ok, mitigation of bird damage on initial climb when warranted, accelerate above 3000' where most bird impacts occur, secondly be ready for a dual engine failure and emergency electrical config by having the APU ready to start, it doesn't seem to affect in any way normal operation.
the A350 starts the APU automatically when needed.
In dual engine flame out all you have to do is press three buttons the MASTER, ON and BLEED and in 40 seconds you will have it. APU bleed is pressure sensitive switch only opens at correct pressure.