What document must be submitted by Flight Attendants for unusual incidents on a flight?

The Irregular Operations Report (IOR) is the appropriate document that Flight Attendants must submit for unusual incidents encountered during a flight. This report is specifically designed to document irregularities and incidents that deviate from the normal flight operations, such as disruptions, emergencies, or other significant occurrences that affect the safety or experience of the flight. By using the IOR, Flight Attendants provide important information that can be used for review, analysis, and future improvements in operations and safety procedures.

Other reports, such as the Incident Report Form, are typically more specific to particular events and may not cover the broad range of irregular operations, while the Customer Feedback Report focuses on passenger experiences and satisfaction rather than operational anomalies. The Safety Assurance Report, although important, is generally related to broader safety audits and assessments rather than individual flight incidents. Therefore, the IOR is essential to ensure proper documentation and response to unusual occurrences during flights.