If intercoms are inoperable, what alternative methods can be used to communicate with the pilots?

In situations where intercoms are not functioning, effective communication with the pilots is crucial for safety and operational efficiency. The correct choice emphasizes the methods that are practical and viable for communicating important messages.

When intercoms are inoperable, passing messages under the flight deck door allows for discreet and efficient communication without needing to access the flight deck directly. This method ensures that the pilots receive necessary information quickly while maintaining their focus on flying the aircraft.

Additionally, entering the code to open the flight deck door is another method that allows crew members to communicate directly with the pilots when necessary. In an environment where immediate face-to-face communication may be vital, this option provides a means to address urgent matters effectively.

Both methods—passing messages under the flight deck door and entering the code to access the flight deck—are recognized as standard procedures for ensuring that crucial information is conveyed when traditional communication channels are unavailable. This emphasizes the importance of having alternative communication strategies in place to maintain operational safety.