What is the maximum differential pressure during cabin pressurization?

The maximum differential pressure during cabin pressurization for the ERJ 170/175 is indeed 8.0 psi. This limitation is established to ensure the structural integrity of the aircraft during normal operations. Exceeding this pressure can lead to potential structural failures or compromises in the fuselage that may arise from excessive stress. Moreover, maintaining the cabin at this pressure limits the rate of decompression in the event of a failure, enhancing safety for all occupants. This specification is critical in understanding the operational limits and ensuring the aircraft remains within safe thresholds during flight.