According to AFMAN 11-202 V3, what is required if cabin altitude is above 10,000 feet?

When cabin altitude exceeds 10,000 feet, supplemental oxygen is mandated to ensure the safety and well-being of the crew and passengers. At these altitudes, the partial pressure of oxygen decreases, which can lead to hypoxia—a condition where the body does not receive enough oxygen. Providing supplemental oxygen helps mitigate the risks associated with this.

This requirement is essential for maintaining crew performance and passenger health during flight, especially in circumstances like loss of pressure or unanticipated altitude changes. It is important for aircrew members to stay aware of these regulations to prevent physiological impairments that could compromise both safety and operational effectiveness.