What condition should both the mask and tubing be in during the preflight of the POB?

During the preflight inspection of the Portable Oxygen Bottle (POB), it is critical for both the mask and tubing to be in good condition. This ensures that they can function properly in an emergency. A mask that is damaged or worn could result in inadequate sealing around the face, which would compromise the delivery of oxygen. Similarly, tubing must be intact and free from any kinks, obstructions, or leaks to ensure efficient flow of oxygen from the bottle to the user.

The term "good condition" implies that both components should be free of visible defects, clean, and functional. This is essential for the safety of passengers and crew, as reliable access to oxygen can be life-saving in the event of a decompression or other emergencies requiring supplemental oxygen.

Other conditions, such as being new, average, or poor, do not guarantee the functionality and safety needed during a critical situation. New condition, for instance, may imply an unused item, but if it has been damaged or compromised since manufacture, it would not offer the same assurance of reliability. Average condition could indicate that the items may have some wear and could potentially fail under stressful conditions. Poor condition is unacceptable, as it signifies that the equipment might not operate as intended when needed most.