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GLF4 crew lost pressurization control because of a main door seal began to fail. The crew made an emergency descent to FL200.
| Attributes | |
| ACN | 612068 |
| Time | |
| Date | 200403 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : czqx.artcc |
| State Reference | NE |
| Altitude | msl single value : 44000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : czqx.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Gulfstream IV |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Route In Use | enroute : atlantic |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : commercial pilot : multi engine pilot : cfi |
| Experience | flight time last 90 days : 75 flight time total : 6000 flight time type : 2000 |
| ASRS Report | 612068 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : cabin pressurization other flight crewa other flight crewb |
| Resolutory Action | aircraft : equipment problem dissipated controller : provided flight assist controller : issued new clearance flight crew : declared emergency flight crew : overcame equipment problem flight crew : diverted to another airport other |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft Environmental Factor |
| Primary Problem | Aircraft |
Narrative:
While at FL410, main door seal began to fail and cabin started climbing at a rate of 1000-2000 FPM. Aircraft began emergency descent as per contingency rules to initial altitude of 20000 ft. While descending through about FL220, door seal resealed and aircraft regained pressurization. Flight continued to europe, but stopped at einn (shannon ireland). No injuries or conflict with other aircraft.
Original NASA ASRS Text
Title: GLF4 CREW LOST PRESSURIZATION CTL BECAUSE OF A MAIN DOOR SEAL BEGAN TO FAIL. THE CREW MADE AN EMER DSCNT TO FL200.
Narrative: WHILE AT FL410, MAIN DOOR SEAL BEGAN TO FAIL AND CABIN STARTED CLBING AT A RATE OF 1000-2000 FPM. ACFT BEGAN EMER DSCNT AS PER CONTINGENCY RULES TO INITIAL ALT OF 20000 FT. WHILE DSNDING THROUGH ABOUT FL220, DOOR SEAL RESEALED AND ACFT REGAINED PRESSURIZATION. FLT CONTINUED TO EUROPE, BUT STOPPED AT EINN (SHANNON IRELAND). NO INJURIES OR CONFLICT WITH OTHER ACFT.
Data retrieved from NASA's ASRS site as of July 2007 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.