What happens to cabin pressure control if the blow out disk ruptures?

When the blow-out disk ruptures, it serves as a safety feature designed to prevent excessive cabin pressure during flight. The primary function of the blow-out disk is to allow the cabin pressure to safely vent to the outside atmosphere when it exceeds a certain limit. Once this disk ruptures, it creates an uncontrolled opening, leading to a situation where the cabin pressure is no longer regulated.

The cabin will begin to lose pressure as it equilibrates with the outside environment, resulting in potentially hazardous conditions for passengers and crew. The rupture of the blow-out disk means that there is no longer an effective means for managing or controlling cabin pressure, and thus it cannot be maintained at the desired level for passenger comfort and safety. Maintaining cabin pressure within specified limits is crucial for safety, especially at high altitudes.

In summary, the correct answer reflects the fact that the rupture of the blow-out disk disrupts the pressure control system, leading to an uncontrolled loss of cabin pressure.