What should be done with the aft lower access panel during firefighting duties?

The correct action during firefighting duties is to leave the aft lower access panel closed and not open it. Keeping the panel closed is crucial for several reasons. First, opening the panel could potentially introduce oxygen into an area that may already be compromised by a fire, which could exacerbate the situation and lead to a more intense fire or even an explosion. Additionally, maintaining the closure helps to contain any potential flames or smoke within the affected area, preventing them from spreading to other parts of the aircraft.

Furthermore, leaving the panel closed aids in preserving the integrity of the aircraft structure and systems during a fire. It helps to ensure that firefighters can focus their efforts in a controlled manner without having to deal with unnecessary risks associated with opening compartments that may be compromised. The procedural guidelines for such situations emphasize the importance of containment and minimizing risk to personnel and equipment.