What happens if the cabin differential pressure becomes too great?

When the cabin differential pressure becomes too great, it can lead to structural damage to the fuselage. Aircraft are designed to withstand certain pressure differential limits, and exceeding these limits can put excessive stress on the airframe. This pressure differential occurs between the inside of the cabin, which is pressurized for passenger comfort and safety, and the outside atmospheric pressure, which is significantly lower at cruising altitudes.

If this differential pressure becomes excessive, it can result in various forms of structural failure, such as cracks or even catastrophic structural failure in extreme cases. The design and materials used in aircraft construction account for maximum pressure differentials to ensure safety, but when these limits are exceeded, the integrity of the aircraft can be compromised.

The other options are related to different aspects of cabin pressure issues but do not directly address the consequences of excessive differential pressure in terms of structural integrity.