What should be inspected before using an oxygen mask or cannula?

The inspection of the mask or cannula integrity is crucial before use because it ensures that the equipment is free from tears, cracks, or any form of damage that could compromise its effectiveness. A well-maintained and intact oxygen mask or cannula is necessary for proper fit and function, allowing for adequate oxygen delivery in case of hypoxia or emergency situations at altitude.

Ensuring that the mask or cannula is in good condition directly impacts the safety of the flight. Even if the oxygen source is functioning properly, a damaged mask could lead to insufficient oxygen supply, which is detrimental in an emergency or high-altitude scenario. This emphasizes the importance of thorough pre-use checks on the integrity of the oxygen equipment.