What should be done if the emergency oxygen cylinder is not adequately charged?

When the emergency oxygen cylinder is found to be inadequately charged, notifying maintenance is essential for ensuring the safety and operational integrity of the aircraft. The emergency oxygen system is a critical component designed to provide supplemental oxygen in case of a sudden loss of cabin pressure or other emergencies that may affect the availability of breathable air at altitude.

By notifying maintenance, the issue can be addressed promptly, and the cylinder can be inspected, serviced, or replaced as necessary. This not only ensures compliance with safety regulations but also maintains the performance standards required for safe flight operations. Proper maintenance checks and responses are vital for operational readiness, especially since the emergency oxygen system may be called into action during critical flight scenarios.

Other options suggest operational restrictions based on altitude, which may be considered in certain circumstances; however, the appropriate first step is to ensure the oxygen system is functioning correctly before determining any flight limitations.