What is one function of the PEDD?

The Primary Engine Data Display (PEDD) serves a critical role in aviation by providing pilots with a visual representation of engine operations. This is essential for monitoring the health and performance of the engine in real-time. The display features parameters such as engine RPM, temperature, fuel flow, and other vital statistics that allow pilots to assess whether the engine is functioning within normal operational limits. By having this information readily visible, pilots can make informed decisions regarding the status of the aircraft's propulsion system, enhancing safety and operational efficiency.

In contrast, the other options refer to different functions not associated with the PEDD. Measuring airspeed and altitude pertains to other instruments in the cockpit, while displaying navigation data is the role of the Multi-Function Display (MFD) or other navigation systems. Controlling engine start-up procedures is also a function of different systems rather than the PEDD itself. The PEDD's primary focus is solely on the display of engine operational data, which emphasizes the importance of continuous monitoring of engine performance during flight operations.