What must a flight attendant do upon discovering the interphone is inoperative?

When a flight attendant discovers that the interphone is inoperative, the correct action is to report the issue to the Pilot in Command (PIC). This is essential for maintaining effective communication within the flight crew, especially in situations where the interphone is a critical tool for coordinating safety and operational procedures. The PIC needs to be informed of any equipment malfunctions, as this allows them to assess the situation and determine the necessary responses or alternatives to ensure safety and continue operations effectively.

Effective communication between flight attendants and pilots is crucial, particularly during in-flight operations. By reporting the malfunction, the flight attendant helps ensure that all safety protocols are followed and that any potential impacts of the failure are addressed appropriately. This communication line is vital for handling emergencies or coordinating responses to changing situations in-flight.

Fixing the interphone is not part of the flight attendant's responsibilities, as their role focuses on safety and passenger service rather than technical repairs. Notifying other crew members can be important, but it should be done after escalating the issue to the PIC, who can then disseminate information as necessary. Waiting until landing would not be appropriate, as timely communication is critical for operational safety.