What is the procedure during an APU fault indicated by the EICAS?

The procedure during an APU (Auxiliary Power Unit) fault indicated by the EICAS (Engine Indication and Crew Alerting System) involves turning off the APU and reporting the situation. This action is appropriate as it ensures the safety of the aircraft and its systems. When a fault is indicated, there is a risk that the APU could malfunction further, potentially leading to additional complications such as fire, loss of power, or other operational issues.

By shutting down the APU, the crew can mitigate these risks and avoid any potential hazards that may arise from operating a faulty unit. Following the shutdown, it's essential to report the APU fault to maintenance personnel so that a thorough inspection and necessary repairs can be performed before the aircraft is used again. This procedure demonstrates a focus on safety and adherence to standard operating procedures, which is vital in aviation operations.

The other options generally do not address appropriate responses to APU faults in a safety-oriented manner. They could lead to improper handling of the situation, which is why those actions are not the correct procedures.