Does the differential pressure limit vary between A320 models?

• A. No, it is fixed at 6.0 psi across models.
• B. Yes, it varies slightly by model.
• C. It varies with altitude only.
• D. It is not specified in the manual.

Answer: (B)

The difference in maximum cabin differential pressure is due to the airframe’s certification limits, which can change slightly between variants of the A320 family. Each model (A319, A320, A321, and even different builds or generations) may have small structural or certification differences that lead to a different delta-P limit. Because of these variations, the differential pressure limit isn’t a single value for all A320s; it’s specific to the model.

In practice, you’d verify the exact figure in the model’s limitations data (Flight Manual/airworthiness limitations) for the precise value. It isn’t fixed at 6.0 psi across models, it isn’t something that only varies with altitude, and it is specified in the manual.