Narrative:

The aircraft inadvertently pressurized below landing level; and we inadvertently landed with approx 2.5 psi differential pressure; following an ECAM status message at around 500 ft. It took a while to realize what had happened; and being on a short approach I landed. Following the landing; the outflow valve opened and the pressure equalized. Write up made in the logbook. The aircraft was operated with system 1 in the auto mode; and we could not figure out why this happened. System 1 pressure controller in the usual auto mode was being used with ZZZ as a landing airport in the FMC. We couldn't figure out why this happened. We didn't catch this until we received the ECAM status message because this trip has an extremely long duty day especially when factoring in the drive to work during rush hour in the morning.

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Original NASA ASRS Text

Title: An A319 landed while still pressurized to 2.5 PSI differential due to a pressurization system malfunction.

Narrative: The aircraft inadvertently pressurized below landing level; and we inadvertently landed with approx 2.5 PSI differential pressure; following an ECAM status message at around 500 FT. It took a while to realize what had happened; and being on a short approach I landed. Following the landing; the outflow valve opened and the pressure equalized. Write up made in the logbook. The aircraft was operated with system 1 in the auto mode; and we could not figure out why this happened. System 1 pressure controller in the usual auto mode was being used with ZZZ as a landing airport in the FMC. We couldn't figure out why this happened. We didn't catch this until we received the ECAM status message because this trip has an extremely long duty day especially when factoring in the drive to work during rush hour in the morning.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.