B748
Make sure there is some fuel in each tank.
Engage electricals, turn on fuel flow and boost pumps.
Turn APU to START, it will go back to ON. When APU switches light up to AVAIL press it and switch it to ON, disconnecting external power.
Go to center console and turn on fuel flow.
Go back to overhead and send bleed air to each engine (button moves, but this is not simulated, so you can actually skip this), then engage starter.
