Bombardier Learjet 45 Fuel Panel

Do you know when should I use the Fuel Crossfeed switch and the Fuel pumps switch?

Normally the fuel cross flow is only used during single engine emergencies to access fuel on the side of the dead engine. Can be used to balance fuel but normally not required.

Go by the checklist on your knee board but the fuel pump switches are normally pushed in(on) and show dark, before engine start and turned off during engine shutdown. The pumps come on in event of low fuel pressure caused by a failure within the fuel system.