I was reading though this and am wondering about the following:
It says if AC Bus 1 fails to supply minimum cabin lighting then the overhead emergency lights come on automatically.
Is that AC Bus 1-1,1-2 or both?
What exactly is minimum cabin lighting and when does "it" know when that is not being obtained?
Also the cabin emergency lights come on if the DC Ess bus fails-they then run on their own internal batteries. Any idea how long they last?
Grateful if anyone can shed some....um, light on these questions...
