What must be the status of the pilot PDF and MFD prior to takeoff?

The requirement for the pilot's Primary Display Format (PDF) and Multi-Function Display (MFD) to be installed and operational prior to takeoff is critical for several reasons. These displays provide essential flight data, navigation information, and systems status, which are necessary for safe operation during all phases of flight, especially during takeoff.

Having both displays operational ensures that the pilot has access to critical information for monitoring aircraft performance, environmental conditions, and navigational data. This capability is vital for situational awareness and decision-making as the aircraft moves through the takeoff phase where pilots are particularly focused on aircraft performance and adherence to flight parameters.

If the displays were only operational in backup mode or turned off, the pilot would lack access to vital information needed for safe operation. Alternatively, if they were edged in normal mode, it would not meet the standard operational requirement for takeoff readiness. Thus, it is imperative that both the pilot PDF and MFD be fully installed and operational to comply with safety regulations and ensure the pilot has the necessary tools for effective flight management.