Originally Posted by
Samten
I asked my friend to check it in the sim (haven't seen it by my eyes, so I'm not 100% sure).
Switched off Blue HS. Both ailerons operable (from Green HS). So my previous post was wrong. Thanks guys!
Now the interesting part:
Next ELAC2 was switched off (with Blue HS already offline). One aileron stopped operation!
Bottom line:
In case of HS failure BOTH ELACs can operate simultaneously - each moving one aileron. But, in fact, each ELAC is hard-wired to only one jack per aileron. So in case of Blue HS failure, ELAC1 cannot simply switch to Green jack on the left aileron and needs help from ELAC2.
For the same reason with dual engine flame out you loose right Aileron because it requires ELAC2 to operate it with Blue system and ELAC2 is lost till at least APU comes on line.