What is the purpose of closing the door when fighting a gash cart fire?

The purpose of closing the door when fighting a gash cart fire is primarily to contain the fire and help prevent the supply of oxygen that fuels it. By shutting the door, the available airflow to the fire is significantly reduced, which can help slow its growth and spread. This action is crucial during an emergency situation, as it buys time for firefighting efforts and can help mitigate the risk of the fire escalating uncontrollably. Containing the fire also limits the potential for it to exit the immediate area, protecting both the aircraft and the occupants from smoke and flames.

While other considerations, such as safety from unwanted entry and limiting smoke spread, are important, the primary focus in the context of fire management is on containment and reducing the fire’s oxygen supply.