What is the function of the 'Duty-In' procedure?

The 'Duty-In' procedure is an essential part of a flight attendant's responsibilities, as it involves arriving at work and officially checking in for duty. This process is vital for ensuring that all flight attendants are accounted for, prepared, and ready to start their shifts. During the Duty-In procedure, flight attendants may review important information such as flight details, assignments, and any special instructions pertaining to the day's flights. This procedure sets the tone for the service and safety measures that will be implemented throughout the flight, making it a crucial component of operational protocols.

The other options, while related to various tasks and responsibilities in the airline industry, do not accurately describe the specific function of the Duty-In procedure. Maintenance of the aircraft, menu preparation, and safety briefings are all important aspects of a flight attendant's role, but they occur at different points in the workflow and are not encompassed by the Duty-In process.