How should you isolate a fire to prevent smoke spread in the cabin?

• A. Close the affected compartment door, close air vents, and follow isolation steps per procedure
• B. Open the affected compartment door to ventilate
• C. Evacuate passengers immediately
• D. Ignore the fire and continue service

Answer: (A)

Isolating a fire in the cabin hinges on cutting off the airflow to the affected area. Close the compartment door to create a barrier, close the air vents to stop the ventilation from circulating smoke, and follow the isolation steps laid out in the procedures. This combination slows or stops smoke and hot gases from spreading to other zones and keeps the rest of the cabin safer while you manage the incident. Opening the door would reintroduce air and propagate smoke, while ignoring the fire or continuing service would increase risk; evacuation decisions come next, based on the evolving situation.