Which buses are lost in the event of a GEN 1 or GEN 2 failure?

In the event of a GEN 1 or GEN 2 failure, the correct option identifies that the GEN BUS, CABIN BUS, and NON-ESSENTIAL BUS are lost. This outcome is based on the electrical system architecture of the Pilatus PC-12 NG, where the generator buses are essential for distributing power to various electrical systems.

The GEN BUS is primarily responsible for powering the aircraft's main electrical systems, while the CABIN BUS provides power to cabin-related amenities and non-essential systems. The NON-ESSENTIAL BUS includes circuits that are not critical for flight but are still important for comfort and convenience. If either of the generators fails, the loss of these buses is expected because they rely on the operational status of the generators to provide power.

Understanding the implications of generator failure is crucial for flight safety and operational procedures, as pilots must be aware of which systems will remain functional and which will not in such scenarios.