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B757 captain reports cabin altitude warning at FL390. QRH procedures are complied with and crew elects to divert for maintenance.
| Attributes | |
| ACN | 822265 |
| Time | |
| Date | 200902 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Pressurization System |
| Person 1 | |
| Function | Captain Pilot Flying |
| Experience | Flight Crew Last 90 Days 200 Flight Crew Total 15000 Flight Crew Type 8000 |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Experience | Flight Crew Last 90 Days 150 Flight Crew Total 16000 Flight Crew Type 3000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
I was pilot flying at FL390 when master warning and cabin altitude warning/lights came on. We ran cabin altitude and requested descent for pressurization problem. I notice cabin altitude about 11;000 ft with the outflow valve closed. After starting descent; first officer mentioned that cabin altitude was descending. Below FL290; I noticed the cabin altitude below 10;000 ft. Continued descent to 15;000 ft. Checked with cabin crew and they said they heard a pop and vibration during descent. Conferred with maintenance through dispatch and diverted to ZZZ.
Original NASA ASRS Text
Title: B757 Captain reports cabin altitude warning at FL390. QRH procedures are complied with and crew elects to divert for maintenance.
Narrative: I was pilot flying at FL390 when Master Warning and Cabin Altitude warning/lights came on. We ran Cabin Altitude and requested descent for pressurization problem. I notice cabin altitude about 11;000 FT with the outflow valve closed. After starting descent; First Officer mentioned that cabin altitude was descending. Below FL290; I noticed the cabin altitude below 10;000 FT. Continued descent to 15;000 FT. Checked with cabin crew and they said they heard a pop and vibration during descent. Conferred with Maintenance through Dispatch and diverted to ZZZ.
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.