1.45 MW is the TOTAL generating capacity of the engines & APU. It is not what the a/c needs. EG. Dispatch with one VFSG inoperable is allowed under MEL. Limit is 180 mins ETOPS.
The 787 still has lots of hydraulics by the way. Electrical actuators have replaced the brakes, 4 spoilers and (I think) stab trim. The rest is still hydraulic.
It is pneumatics that are the big change. No ATA CH 36 in the AMM on this beast.
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