What is the indication required from the AC load meter on the AC SYS CONTROL PANEL?

The requirement for the AC load meter on the AC SYS CONTROL PANEL being set at 1.0 is based on the operational parameters for ensuring the Auxiliary Power Unit (APU) operates efficiently and effectively supplies power to its systems. This value reflects the expected load that the APU can handle while maintaining reliability without being overloaded.

A reading of 1.0 on the AC load meter indicates that the APU is supplying a balanced and appropriate amount of electrical power, which is crucial for the functioning of the aircraft’s systems. Exceeding this value may lead to issues with power supply, such as tripping the APU or causing disturbances in operation, while a significantly lower value might indicate underutilization, affecting fuel efficiency and overall operational efficacy.

Understanding the load levels within the APU's design specifications is vital for safe operation, making maintaining an appropriate load a critical factor for both performance and safety of the aircraft operations.