What is the maximum relief differential pressure for the CRJ 900 cabin?

The maximum relief differential pressure for the CRJ 900 cabin is 8.7 PSI. This limitation is critical for ensuring the structural integrity of the aircraft during operation at altitude and managing the cabin environment. Exceeding this maximum differential pressure can lead to potential safety hazards, including structural failure or malfunction of the pressure relief system, which is designed to maintain a safe and comfortable environment for passengers and crew. Therefore, maintaining awareness of this limitation is essential for pilots during pre-flight checks and operational planning. Understanding these limitations is part of ensuring safe flight operations.