What is the result of the loss of one generator?

When one generator fails, the electrical system of the aircraft can still function effectively through the remaining generator. The correct outcome in this scenario is that the cabin bus and non-essential bus will fail. This is due to the management of electrical power distribution in aircraft systems, which prioritizes the essential systems to ensure continued operation and safety.

In practical terms, when one generator goes offline, the load on the operational generator must be carefully balanced to maintain critical functions such as navigation and communication systems. This can result in the cabin bus, which often powers less critical loads, being shed to preserve power for essential aircraft systems. Non-essential busses, which supply power to systems that are not critical to flight safety, are typically the first to be disconnected to ensure that sufficient power is available for necessary systems.

Thus, the failure of the cabin and non-essential busses is a direct consequence of the need to efficiently manage power in the event of a generator failure, allowing the aircraft to still operate safely even with reduced power capacity.