At what altitude does the red Cabin Alt High CAS message illuminate?

The red Cabin Alt High CAS message illuminates at an altitude range of 9,500 to 10,000 feet to indicate that the cabin altitude is above normal limits, which is crucial for the safety of passengers and crew. This warning alerts the flight crew to potential issues with cabin pressurization, which can affect oxygen levels and overall comfort during flight. Understanding this altitude range is essential because it helps crew members respond promptly to maintain cabin pressure and ensure the safety of everyone on board. Monitoring cabin altitude is a vital aspect of flight operations, especially in pressurized aircraft, and knowing the exact altitude at which warnings are triggered allows for effective management of cabin conditions.