Is all data presented on the AEDD processed by the PMU?

The correct choice indicates that not all data presented on the Aircraft Engine Data Display (AEDD) is processed by the Power Management Unit (PMU). The PMU is crucial for managing engine performance, controlling fuel flow, and ensuring optimal engine operation; however, it does not process every type of data displayed on the AEDD.

Certain readings, like those related to fuel flow and temperature, might be directly derived from sensors that relay information to the AEDD without PMU processing. Additionally, the AEDD presents collected data from various sources, some of which may operate independently of the PMU's processing functions.

Understanding this distinction is essential because it highlights the division of responsibilities between various systems within the aircraft's avionics. While the PMU focuses on engine performance management, other systems contribute to the overall data availability on the AEDD, underscoring the integrated nature of aircraft systems.