What action should be taken if the POB gauge drops below 200 PSI?

When the Portable Oxygen Bottle (POB) gauge drops below 200 PSI, it is essential to replace the POB immediately to ensure that there is sufficient oxygen available in case of any in-flight emergencies. Maintaining operational safety and providing adequate care to passengers, especially those who might require supplemental oxygen, is crucial. A POB at such a low pressure may not deliver enough oxygen to handle potential needs during flight, especially in emergencies where timely access to oxygen is critical.

Replacing the POB proactively helps ensure that you are prepared for any situations that may arise, such as a sudden need for oxygen due to a medical issue or cabin pressure loss. Other actions, like debriefing passengers or monitoring the POB gauge, do not adequately address the risk associated with having insufficient oxygen supply available. Continuing operation as usual when the gauge is in a low state could compromise passenger safety. Therefore, replacing the POB is the appropriate action when the gauge indicates low pressure.