What is the ENG Ignition powered by?

The ENG Ignition system on the CRJ550 is designed to ensure reliable engine start-up by utilizing multiple power sources. It is powered by both System A AC power and the Battery Bus through a static inverter. This redundancy is important as it enhances the reliability of the ignition system, ensuring that even if one power source fails, the other can maintain ignition capability.

In the context of the options provided, it is essential to recognize that the system is specifically designed to utilize both AC power and battery power to operate effectively. This dual-source capability provides greater operational flexibility and safety, particularly in the dynamic environment of an aircraft.

Understanding the requirement for reliable engine ignition systems under varying operational conditions is crucial for safe aircraft operation. By having a system that can draw power from multiple sources, the CRJ550 ensures that the engines can be started reliably, even in cases where one power system could be compromised.