Originally Posted by
A-FLOOR
When you say "all electrical" do you mean including the ESS buses?
\
My question was with regards to all the normal AC power sources being offline with emergency backup power still available.
With the 747-400, I believe that you can't start the APU in flight, so there really is no use for the descent. I've seen an all engine failure in a 747 sim and only the Capt's PFD, ND and the primary EICAS worked while the emergency lights automatically turned on. Still had control of the aircraft though, through the standby bus (I am prepared to be corrected on this
). And 747s do have inverters for DC to AC and vice versa.
Originally Posted by
vapilot2004
More lights and bells with an all engine failure. The seat cushion would probably look different too.
...and feel different too.
