What information does the 787's fault diagnostic system monitor?

What information does the 787's fault diagnostic system monitor?

• A. Generator status
• B. Bus voltages and currents
• C. Generator status, bus voltages, currents, and component faults
• D. Hydraulic pressure readings

Answer: (C)

The fault diagnostic system in the 787 focuses on the health of the electrical power system by watching generation, distribution, and the components that make it work. It continuously checks generator status so you know whether a generator is online and producing power, and it monitors the ability of that generation to meet load. It tracks bus voltages to ensure all essential and nonessential buses stay within acceptable voltage ranges, and it watches currents to detect overloads, abnormal draws, or faults on the distribution side. It also records component faults across the power system—things like power electronics, converters, contactors, and other electrical hardware—so crews can quickly identify the source of a problem. This integrated monitoring supports automatic reconfiguration and protections, and it surfaces warnings or ECAM messages to aid rapid diagnosis and safe operation.

The fault diagnostic system in the 787 focuses on the health of the electrical power system by watching generation, distribution, and the components that make it work. It continuously checks generator status so you know whether a generator is online and producing power, and it monitors the ability of that generation to meet load. It tracks bus voltages to ensure all essential and nonessential buses stay within acceptable voltage ranges, and it watches currents to detect overloads, abnormal draws, or faults on the distribution side. It also records component faults across the power system—things like power electronics, converters, contactors, and other electrical hardware—so crews can quickly identify the source of a problem. This integrated monitoring supports automatic reconfiguration and protections, and it surfaces warnings or ECAM messages to aid rapid diagnosis and safe operation.