What is the initial action in lavatory fire management?

• A. Use an extinguisher if safe.
• B. Close the lavatory door to limit airflow.
• C. Open the lavatory vent to vent smoke.
• D. Notify ATC immediately.

Answer: (B)

When a lavatory fire occurs, the immediate goal is containment. Closing the lavatory door minimizes airflow into and out of the space, which slows the fire’s growth and keeps smoke from spreading into the cabin. That barrier gives crews time to assess and respond safely. Opening the lavatory vent would feed the fire with more oxygen and drive smoke into the cabin, making the situation worse. Using a fire extinguisher should only happen if it’s safe and you have the right training and access after containment. Notifying the rest of the crew and authorities is necessary, but the first action to stabilize the scene is to isolate it with the door.