A320 Auto Xbleed

[MD83FO]

Anyone knows why the Auto X Bleed logic is not included in the engine relight scenario?

[speedbird787]

Its already there in the NEO... just saw that in the neo sim...

[noptawat]

Originally Posted by MD83FO

Anyone knows why the Auto X Bleed logic is not included in the engine relight scenario?

You have to manually turn the X-Bleed knob to OPEN.

It's not automatic ! Imagine ie. Eng FIRE or BMC1 fault ( A320 APU's bleed pipe is on the left pipe line side compared to X-Bleed Valve POS.)

Please follow QRH Procedure. Normally Windmill Quick relight works with airspeed 300kt.


PS. It's the same way when you perform X-bleed engine start on ground 1. APU bleed off (ensure engine bleed off) 2. Manually X-bleed OPEN.

[MD83FO]

will this logic change when pilots are removed from the cockpit?

[vilas]

Originally Posted by MD83FO

Anyone knows why the Auto X Bleed logic is not included in the engine relight scenario?

It is according to the logic only.The logic only opens the Xbleed automatically when APU BLEED is on otherwise it remains closed. When engine fails the XBleed remains closed.That's why if fire button is not pushed you get a ECAM "If performance permits X bleed open". Engine relight procedure wants to use Iive engine bleed if wind milling is less. Since the X bleed does not automatically open it asks you to open manually.