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EMB145 captain reports being dispatched with pack one inoperative and noticing cabin altitude climbing rapidly as the aircraft passes through 16;000 ft during climb. Pack number two has tripped and cannot be reset and flight returns to departure airport.
| Attributes | |
| ACN | 1019512 |
| Time | |
| Date | 201206 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | EMB ERJ 145 ER/LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Component | |
| Aircraft Component | Air Conditioning and Pressurization Pack |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
After departure passing through 10;000 we are closely monitoring pack number two since pack number one was MEL'ed. Passing through 16;000 ft we noticed that the plane was not pressurizing and advised ATC we needed to level off at 18;000. At this point cabin rate [altitude] was 6;500 and later turned amber. QRH was consulted to try to recycle pack number two. At this point cabin rate [altitude] was 10;000; called ATC for a lower altitude and to return to departure airport. I did not declare an emergency but asked for priority to the airport. The flight attendant was called and at this point she reported a strange noise [in the cabin]. Monitor the cabin rate and notice the problem sooner.
Original NASA ASRS Text
Title: EMB145 Captain reports being dispatched with pack one inoperative and noticing cabin altitude climbing rapidly as the aircraft passes through 16;000 FT during climb. Pack number two has tripped and cannot be reset and flight returns to departure airport.
Narrative: After departure passing through 10;000 we are closely monitoring pack number two since pack number one was MEL'ed. Passing through 16;000 FT we noticed that the plane was not pressurizing and advised ATC we needed to level off at 18;000. At this point cabin rate [altitude] was 6;500 and later turned amber. QRH was consulted to try to recycle pack number two. At this point cabin rate [altitude] was 10;000; called ATC for a lower altitude and to return to departure airport. I did not declare an emergency but asked for priority to the airport. The Flight Attendant was called and at this point she reported a strange noise [in the cabin]. Monitor the cabin rate and notice the problem sooner.
Data retrieved from NASA's ASRS site as of July 2013 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.