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A319 flight crew reported a pressurization controller malfunction at FL270. While maintaining cabin pressure manually; an arrival fix was crossed above the published altitude.
| Attributes | |
| ACN | 1442181 |
| Time | |
| Date | 201704 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZDV.ARTCC |
| State Reference | CO |
| Environment | |
| Flight Conditions | VMC |
| Light | Dawn |
| Aircraft 1 | |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Pressurization Control System |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 550 Flight Crew Total 12000 Flight Crew Type 7000 |
| Person 2 | |
| Function | Pilot Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Undershoot |
Narrative:
I was the pilot monitoring on this leg. At approximately FL270 on the Anchr4 arrival the pressurization page popped up on the systems display page with a cabin altitude warning in red; with the cabin altitude between 9700 to 9800 feet and climbing rapidly. We turned off the manual pressure mode selector for 10 seconds in order to switch auto mode controllers; the other auto controller was still not controlling the cabin sufficiently. We resorted to controlling the cabin pressure with the manual toggle switch to control the outflow valve. This was demanding and very distracting in trying to maintain an adequate rate of descent and cabin altitude during the descent. This was the major contributing factor in us crossing the landr fix on the arrival 800-1000 feet high.
Original NASA ASRS Text
Title: A319 Flight Crew reported a pressurization controller malfunction at FL270. While maintaining cabin pressure manually; an arrival fix was crossed above the published altitude.
Narrative: I was the Pilot Monitoring on this leg. At approximately FL270 on the Anchr4 arrival the pressurization page popped up on the systems display page with a cabin altitude warning in red; with the cabin altitude between 9700 to 9800 feet and climbing rapidly. We turned off the manual pressure mode selector for 10 seconds in order to switch auto mode controllers; the other auto controller was still not controlling the cabin sufficiently. We resorted to controlling the cabin pressure with the manual toggle switch to control the outflow valve. This was demanding and very distracting in trying to maintain an adequate rate of descent and cabin altitude during the descent. This was the major contributing factor in us crossing the LANDR fix on the arrival 800-1000 feet high.
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.