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A C500 climbing to FL410 declared an emergency due to loss of cabin pressure caused by an in-flight test water spray probe seal failure.
| Attributes | |
| ACN | 444420 |
| Time | |
| Date | 199907 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : mkc.airport |
| State Reference | MO |
| Altitude | msl single value : 40800 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zkc.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Citation I |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 80 flight time total : 3400 flight time type : 100 |
| ASRS Report | 444420 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : cabin pressure indicator other flight crewa |
| Resolutory Action | flight crew : diverted to another airport flight crew : declared emergency |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Heard bang aft cabin approximately 200 ft prior to leveling at FL410. Observed cabin altitude climbing rapidly. Called for and conducted emergency descent. Only declared emergency because ARTCC would not authority/authorized immediate lower altitude. Leveled at 15000 ft, conducted control checks and crew member checks. Landed uneventfully at ict. Maintenance found seal around water spray pipe failed. Pipe used for in-flight icing testing -- non production.
Original NASA ASRS Text
Title: A C500 CLBING TO FL410 DECLARED AN EMER DUE TO LOSS OF CABIN PRESSURE CAUSED BY AN INFLT TEST WATER SPRAY PROBE SEAL FAILURE.
Narrative: HEARD BANG AFT CABIN APPROX 200 FT PRIOR TO LEVELING AT FL410. OBSERVED CABIN ALT CLBING RAPIDLY. CALLED FOR AND CONDUCTED EMER DSCNT. ONLY DECLARED EMER BECAUSE ARTCC WOULD NOT AUTH IMMEDIATE LOWER ALT. LEVELED AT 15000 FT, CONDUCTED CTL CHKS AND CREW MEMBER CHKS. LANDED UNEVENTFULLY AT ICT. MAINT FOUND SEAL AROUND WATER SPRAY PIPE FAILED. PIPE USED FOR INFLT ICING TESTING -- NON PRODUCTION.
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.