What is the maximum operating altitude with cabin pressure lost?

The maximum operating altitude with cabin pressure lost for the CRJ 900 is 41,000 feet. This limit is crucial for ensuring the safety and operability of the aircraft in the event of a cabin depressurization. Operating at this altitude allows pilots to manage potential emergency situations and maintain a margin of safety with respect to oxygen availability for the crew and passengers.

By knowing this limit, pilots can make informed decisions during flight planning and operations to ensure that they remain within the safe aerodynamic and physiological operating parameters of the aircraft. Altitudes beyond this limit could compromise the safety of individuals onboard due to decreased oxygen availability and could lead to hypoxia, presenting serious risks during flight.

Understanding these limitations is essential for effective crew resource management and helps ensure compliance with regulatory requirements.