What actions are required for a POB check?

To conduct a proper Portable Oxygen Bottle (POB) check, it is essential to verify the gauge reading and ensure that the bottle is securely secured in its bracket. This step is critical because the gauge reading will inform you about the amount of oxygen available in the bottle, which is vital for safety during an emergency situation. Ensuring the bottle is secured prevents it from becoming a projectile in the cabin, which could pose a safety risk to passengers and crew. These actions help maintain readiness in case oxygen is needed during flight, thereby ensuring the effectiveness of the emergency equipment and enhancing overall safety protocols.