Which item must be onboard during boarding, deplaning, and anytime passengers are on board?

• A. Required number of flight attendants
• B. Passengers' personal belongings
• C. Emergency oxygen masks
• D. Fire extinguishers

Answer: (A)

The key idea is that there must be a minimum number of flight attendants on board whenever passengers are on the aircraft, including during boarding and deplaning. This staffing is mandated by regulations so the cabin can be safely supervised, passengers can be guided to seats and to exits, and crews can respond quickly in any situation. Flight attendants are the people responsible for managing safety procedures in the cabin, assisting passengers, and coordinating evacuations if needed, and the rule ensures they’re present at all times when people are aboard.

Emergency oxygen masks and fire extinguishers are essential safety equipment and must be on the aircraft, but they don’t define the need for crew presence during boarding and deplaning. Passengers’ personal belongings aren’t a safety requirement in this context.