What is the protocol if flight attendants cannot contact the PIC via interphone?

When flight attendants are unable to contact the Pilot in Command (PIC) via interphone, using an alternative communication method is crucial to ensure safety and operational efficiency. This is because the inability to reach the PIC may indicate an urgent situation that requires immediate attention or the need for critical information to be relayed swiftly.

By reporting through another channel, such as an emergency radio or directly contacting cabin crew who can relay messages, the attendants ensure that important communications are not delayed. This protocol is essential, especially in scenarios where time-sensitive decisions may need to be made regarding passenger safety or aircraft operations.

The other choices, while they may seem reasonable, could lead to unnecessary delays or miscommunication. Waiting for a response may cause prolonged uncertainty, attempting to reconnect repeatedly may not solve the issue if there is a systemic problem, and direct communication might not be an option in all circumstances. Therefore, reporting through a different channel is the most effective way to maintain communication and address any potential issues promptly.