What should be done if a fire alarm goes off in the cabin?

When a fire alarm goes off in the cabin, it’s crucial to report it to the flight deck. This action is necessary because the flight crew is responsible for the overall safety of the aircraft and can take the necessary steps to investigate or manage the situation. Alerting the flight deck allows them to assess whether there is an actual fire or if it might be a false alarm, as well as coordinate an appropriate response.

The other options, while they may seem practical at first glance, do not prioritize safety and proper protocol. Ignoring the alarm poses an unnecessary risk, as an undetected fire can escalate quickly. Telling passengers to remain seated could be part of the protocol, but it should not substitute the need to inform the flight deck, who can make a more informed decision about passenger safety and potential evacuation procedures. Similarly, opening emergency exits immediately without assessing the situation can compromise safety and may lead to chaos or unnecessary danger, particularly if there is no fire or smoke present.