EXTERNAL POWER Switch ( two-position )

EXT PWR - connects AC external power to variable frequency buses

• is capable of powering all AC and DC buses on the airplane
• isolates the AC generators from the buses
• AC EXT PWR ON indication (green) is displayed on the MFD Electrical page when AC external power is connected to the airplane

OFF - disconnects AC external power from variable frequency buses

No current way to connect AC generator to the plane. Use DC EXT PWR. This is common to the real world where few airports have AC ground power units.

AC GEN 1 AND 2 Switches ( two position )

GEN 1 OR GEN 2 - arms respective GCU to activate, and connect its generator to the associated variable frequency bus

• AC GEN 1 or 2 caution light turns on anytime the respective generator is not supplying power