What action should be taken to ensure safe use of oxygen systems?

Completing preflight inspections is crucial to ensure the safe use of oxygen systems. This process involves a thorough check of the oxygen equipment and systems to identify any issues before flight. By conducting preflight inspections, flight engineers can confirm that oxygen masks, lines, and system components are in proper working order, ensuring that the oxygen supply is reliable and accessible during potential emergencies at altitude where supplemental oxygen may be needed.

Preflight inspections typically involve checking for any visible damage, ensuring that the oxygen systems are fully charged, and verifying that all necessary components are in place and functioning properly. This is essential for maintaining safety and readiness, as any failure of the oxygen system during flight could jeopardize the health and safety of the crew and passengers.