If GEN 1 or GEN 2 fails, will all four screens remain functional?

The correct answer reflects a fundamental aspect of the Pilatus PC-12 NG's electrical system design, specifically how the power distribution is organized. In the event of a failure of either GEN 1 or GEN 2, the aircraft’s electrical system is designed to automatically manage bus ties to maintain power to the critical systems, which include the displays.

This automatic bus tie connection allows the remaining generator to support the electrical needs of the aircraft, ensuring that power continues to flow to all four screens even in the event that one generator is offline. This redundancy is essential for maintaining situational awareness and ensuring that the pilots can continue to receive vital flight information without interruption, enhancing safety and operational reliability.

While the other options suggest complete loss of functionality or partial loss, those scenarios do not accurately reflect the design intent and redundancy built into the PC-12 NG's system. The design aims to protect critical systems during normal operations, and this includes ensuring that pilots have access to essential flight data regardless of the status of one generator.