What are the PDIs on the FREON system?

The correct response highlights a specific aspect of the PDIs (Pre-Delivery Inspections) concerning the FREON system, which focuses on the functionality of the system's components. Checking for the presence of two nozzles, with one specifically directed at the waste bin, is essential as it ensures that the air conditioning system can efficiently manage waste and maintain optimal performance.

This detail is crucial because the design of the nozzles can directly affect the air quality and temperature control within the aircraft. By confirming their correct configuration and placement, technicians can ensure that the FREON system operates as intended, providing a safe and comfortable environment for passengers and crew.

In contrast, the other options focus on different areas that are not directly tied to the FREON system. While checking operational status and safety checks, ensuring fuel adequacy, and confirming pilot operational status are all important aspects of aircraft maintenance and safety procedures, they do not specifically relate to the functional assessment of the FREON system's nozzles.