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B737-700 flight crew experiences a cabin altitude warning horn at FL390 followed by an emergency descent and diversion to a suitable airport.
| Attributes | |
| ACN | 1021589 |
| Time | |
| Date | 201207 |
| 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 | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Pressurization System |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 128 Flight Crew Type 10000 |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Experience | Flight Crew Last 90 Days 173 Flight Crew Type 7600 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
Cabin altitude warning horn at FL390; cabin altitude climbed to 14;000 ft after initiating emergency descent. Step-down altitudes coordinated with center and with communication being lost at 10;000 ft. Relay aircraft passed frequency and communication reestablished. QRH checklist accomplished with little to no control of pressurization system. Cabin altitude began coming down on emergency descent passing FL280. Divert decision due to proximity to ZZZ and unknown/uncontrollable nature of problem/pressurization.
Original NASA ASRS Text
Title: B737-700 flight crew experiences a cabin altitude warning horn at FL390 followed by an emergency descent and diversion to a suitable airport.
Narrative: Cabin Altitude Warning horn at FL390; cabin altitude climbed to 14;000 FT after initiating emergency descent. Step-down altitudes coordinated with Center and with communication being lost at 10;000 FT. Relay aircraft passed frequency and communication reestablished. QRH Checklist accomplished with little to no control of pressurization system. Cabin altitude began coming down on emergency descent passing FL280. Divert decision due to proximity to ZZZ and unknown/uncontrollable nature of problem/pressurization.
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.