Originally Posted by
Magplug
787 Operators NEVER power down their aircraft fully because powering it up again is a VERY long and painful process. When the crew walk away from an aircraft it is on gound power with the IRS and batteries turned off. If all engine generators unexpectedly dropped off line after landing you have a pretty dead aircraft that you might as well walk away from. The engineers will be busy for quite a while resuscitating it.
Your second part is correct. An unscheduled and unexpected loss of main bus power can take an age to put right.
The first part is wrong.
787s are powered down if they are not going anywhere for a while and servicing or maintenance is not required. It happens regularly.
Powering up a 787 takes longer than most legacy aircraft but it's not hours. Neither is it painful.
As long as you do it right.