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Air carrier captain reported a malfunctioning pressurization system during descent requiring an immediate descent to a lower altitude.
| Attributes | |
| ACN | 1493706 |
| Time | |
| Date | 201710 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | A321 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Pressurization Control System |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Flight Deck / Cabin / Aircraft Event Other / Unknown |
Narrative:
On initial descent cruise at FL270 for arrival; first officer noticed system display page cabin psi indication was abnormal in red. Immediately; we responded to cabin psi system page abnormality. As cabin altitude was showing 9;400 feet and climbing; I commanded oxygen masks on. We asked for immediate descent with ATC and [advised them] of altitude abnormal condition. Flight attendants were already seated and cabin secured as I advised of turbulence and requested early clean up and stay seated. Descent ended at 10;000 feet. Cabin altitude continued to climb over 11;000 feet. Proceeded to airport; and landing uneventful. No deployment of oxygen masks and no injuries or other incidents.
Original NASA ASRS Text
Title: Air carrier Captain reported a malfunctioning pressurization system during descent requiring an immediate descent to a lower altitude.
Narrative: On initial descent cruise at FL270 for arrival; First Officer noticed System Display page Cabin PSI indication was abnormal in red. Immediately; we responded to Cabin PSI system page abnormality. As cabin altitude was showing 9;400 feet and climbing; I commanded oxygen masks on. We asked for immediate descent with ATC and [advised them] of altitude abnormal condition. Flight attendants were already seated and cabin secured as I advised of turbulence and requested early clean up and stay seated. Descent ended at 10;000 feet. Cabin altitude continued to climb over 11;000 feet. Proceeded to airport; and landing uneventful. No deployment of oxygen masks and no injuries or other incidents.
Data retrieved from NASA's ASRS site 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.