Beed valve on GE CF6
 

If for instance the right engines bleed valves fails to open is it still possible to get bleed air to the right engine anti ice valve....is it supplied from a diiferent point?

It is supplied straight from the high stage. On the -50 it's from the 10th stage. So as long as the engine is turning and burning you've got bleed air for the anti-ice, regardless of the bleed valve position.

[ 13 October 2001: Message edited by: Techman ]

On the -80, nacelle anti-ice is available if the PRV can be opened. If the PRV is automatically closed because the HP bleed valve fails open, the start valve fails open, or a duct overheat is detected, nacelle anti-ice is not available on that engine.