Originally Posted by
LandASAP
Hello everyone,
i'm wondering why, on the B777, when the pack and APU bleed settings are set to Auto, bleed is immediately drawn as soon as the APU starts up? I know from our Airbuses that you're supposed to wait at least 3 minutes (to give some warmup time and to avoid fumes). Why does Boeing apparently not care?
Greetings
Michael
To put things somewhat into perspective, this 3 minute warm up time that Airbus prefers, is only a recent development. It used to be one minute, or even no warm up time at all if I recall correctly. And indeed, the 3 minute rule has more to do with fumes as I understand it.