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After departing two hours late and then declaring an emergency and diverting back to their departure airport due to a pressurization failure; the flight crew of a B737-500 was advised by dispatch they had departed without an updated release requiring an alternate due to destination weather.
| Attributes | |
| ACN | 963947 |
| Time | |
| Date | 201108 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-500 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Pressurization System |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 190 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural FAR Deviation - Procedural Published Material / Policy |
Narrative:
We departed two hours late. Passing FL330 we had a cabin altitude warning horn and began an emergency descent. After diverting to a nearby airport we were notified by dispatch that an alternate had been required due to a weather change minutes before we finally departed. When an aircraft is significantly late; an update of the weather conditions through ACARS or dispatch as close to the actual departure time would ensure that you have appropriate alternate(s) and/or gas if changes are required.
Original NASA ASRS Text
Title: After departing two hours late and then declaring an emergency and diverting back to their departure airport due to a pressurization failure; the flight crew of a B737-500 was advised by Dispatch they had departed without an updated release requiring an alternate due to destination weather.
Narrative: We departed two hours late. Passing FL330 we had a Cabin Altitude Warning horn and began an emergency descent. After diverting to a nearby airport we were notified by Dispatch that an alternate had been required due to a weather change minutes before we finally departed. When an aircraft is significantly late; an update of the weather conditions through ACARS or Dispatch as close to the actual departure time would ensure that you have appropriate alternate(s) and/or gas if changes are required.
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.