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Crj with a single pack deferred departed only to have a pressurization problem climbing through 16;000 ft.
| Attributes | |
| ACN | 831259 |
| Time | |
| Date | 200904 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | FWA.Airport |
| State Reference | IN |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | Regional Jet CL65 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Instrument Flight Crew Commercial Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 200 Flight Crew Total 9000 Flight Crew Type 7500 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
While climbing through 15-16;000 ft I noticed the cabin altitude pressure was much higher than normal and climbing. We told ATC that we needed to level off; so we stopped at 17;000 ft and the cabin altitude continued to climb and we then started a descent. We received a caution message that our cabin altitude exceeded 8500 ft and we ran our QRH procedure for that alert while still requesting a lower altitude. Then we receive a warning message that our altitude exceeded 10;000 ft and we ran the QRH procedure for that and leveled off at 10;000 ft MSL (safe altitude). Continued to our destination without further incident. No sure what caused the problem; but we were already flying with our left pack deferred; so by elimination of that pack; I would guess that the problem originated from the right pack and an associated valve since we weren't pressurizing properly; but cannot be sure since we really didn't have time to analyze the situation beyond what was involved in following our checklist procedure.
Original NASA ASRS Text
Title: CRJ with a single pack deferred departed only to have a pressurization problem climbing through 16;000 FT.
Narrative: While climbing through 15-16;000 FT I noticed the cabin altitude pressure was much higher than normal and climbing. We told ATC that we needed to level off; so we stopped at 17;000 FT and the cabin altitude continued to climb and we then started a descent. We received a caution message that our cabin altitude exceeded 8500 FT and we ran our QRH procedure for that alert while still requesting a lower altitude. Then we receive a warning message that our altitude exceeded 10;000 FT and we ran the QRH procedure for that and leveled off at 10;000 FT MSL (safe altitude). Continued to our destination without further incident. No sure what caused the problem; but we were already flying with our left pack deferred; so by elimination of that pack; I would guess that the problem originated from the right pack and an associated valve since we weren't pressurizing properly; but cannot be sure since we really didn't have time to analyze the situation beyond what was involved in following our checklist procedure.
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.