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A CL65 at FL310 declared an emergency and diverted due to aural warning cycling, momentary loss of primary flight displays and cabin pressurization.
| Attributes | |
| ACN | 634589 |
| Time | |
| Date | 200410 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 31000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Turbulence Fog Rain |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 200 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 250 flight time total : 2800 flight time type : 800 |
| ASRS Report | 634589 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 210 flight time total : 6000 flight time type : 2100 |
| ASRS Report | 634602 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : aural warning other flight crewa other flight crewb |
| Resolutory Action | flight crew : declared emergency flight crew : diverted to another airport |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft Chart Or Publication |
| Primary Problem | Aircraft |
Narrative:
En route at FL310, experienced numerous aural warning cycles. Siren and fire bell cycled repetitively. Contacted maintenance on radio and dispatch. While troubleshooting, maintenance suggested selecting air data selector from norm to 1 -- hold, then back. This was completed but did not fix the problem. While communicating with maintenance, the aircraft's pressurization was momentarily lost and the cabin began to climb rapidly and the primary flight displays and EICAS panels blanked out momentarily. Immediate descent initiated and diversion to ZZZ following a brief discussion with dispatch regarding the best alternate and WX. Uneventful emergency landing and approach at ZZZ. Callback conversation with reporter revealed the following information: the reporter said that maintenance did not report the maintenance action taken or the component failure.
Original NASA ASRS Text
Title: A CL65 AT FL310 DECLARED AN EMER AND DIVERTED DUE TO AURAL WARNING CYCLING, MOMENTARY LOSS OF PRIMARY FLT DISPLAYS AND CABIN PRESSURIZATION.
Narrative: ENRTE AT FL310, EXPERIENCED NUMEROUS AURAL WARNING CYCLES. SIREN AND FIRE BELL CYCLED REPETITIVELY. CONTACTED MAINT ON RADIO AND DISPATCH. WHILE TROUBLESHOOTING, MAINT SUGGESTED SELECTING AIR DATA SELECTOR FROM NORM TO 1 -- HOLD, THEN BACK. THIS WAS COMPLETED BUT DID NOT FIX THE PROB. WHILE COMMUNICATING WITH MAINT, THE ACFT'S PRESSURIZATION WAS MOMENTARILY LOST AND THE CABIN BEGAN TO CLB RAPIDLY AND THE PRIMARY FLT DISPLAYS AND EICAS PANELS BLANKED OUT MOMENTARILY. IMMEDIATE DSCNT INITIATED AND DIVERSION TO ZZZ FOLLOWING A BRIEF DISCUSSION WITH DISPATCH REGARDING THE BEST ALTERNATE AND WX. UNEVENTFUL EMER LNDG AND APCH AT ZZZ. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR SAID THAT MAINT DID NOT RPT THE MAINT ACTION TAKEN OR THE COMPONENT FAILURE.
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.