What does a "Single Hi-Lo Chime" signal from the FA to FAA?

The "Single Hi-Lo Chime" serves as a communication signal from the Flight Attendant (FA) to the Flight Attendant Area (FAA), indicating a need for assistance. This chime is specifically designed to alert the cabin crew when a situation arises that may require additional help, whether it be for a passenger's medical issue, a service request that cannot be attended to by one FA alone, or any other circumstance that necessitates further support.

Understanding this signal is essential for maintaining a safe and responsive cabin environment, as it enables team members to coordinate efficiently in various scenarios. The clarity of this communication helps ensure that both crew members and passengers receive the necessary attention quickly and appropriately.