What does the CREW OXY LOW warning indicate?

The CREW OXY LOW warning indicates that the oxygen quantity remaining in the crew oxygen system is critically low, specifically when it is below 5 liters or the supply pressure drops below 60 psi within the acceptable range of +/- 5 psi. This warning serves as a crucial alert to pilots regarding the operational status of the aircraft's oxygen supply, ensuring that crew members have adequate oxygen available for safe flight operations. Recognizing this threshold is essential for ensuring flight safety and appropriate emergency procedures in case of decompression or other situations that might require supplemental oxygen.