Hey, I am not sure where you get your info from.
Hey, yourself.
I'm told the info is available at:
http://www.smartcockpit.com/
You only get electrical load shedding on the 767 during fuel jettison when you only have 1 "one" electrcal sourse. eg when testing the system on the ground external power or APU supply.
Our company B767-300ER wiring and wiring schematic manuals indicate that the single source requirement is not required. Only one aircraft in our CF6 fleet had the single source requirement (our oldest one) and I believe the wiring has since been modified to remove this requirement on this particular aircraft. A maintenance engineer from another airline, KLM, has told me that variations exist in his airline, too.
Information on the smartcockpit website suggest that Austrian Airlines loadshed their lights.
Rgds.
NSEU