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Crj 700 bleed duct failure resulted in air conditioning pack failure. Aircraft lost cabin pressure and emergency descent was initiated to a landing at nearest airport.
| Attributes | |
| ACN | 744113 |
| Time | |
| Date | 200706 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 700 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 200 flight time total : 16000 flight time type : 10000 |
| ASRS Report | 744113 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 240 flight time total : 8000 flight time type : 5000 |
| ASRS Report | 744096 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : diverted to another airport flight crew : declared emergency flight crew : exited adverse environment |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
At top of climb; received right bleed duct warning. Immediately feeling the cabin pressure anomalies; we requested and received an expedited descent to a lower altitude. But before we could run the applicable QRH procedure and for reasons unknown; both packs went off line causing a rapid climb in cabin altitude; approximately 2500 FPM. Upon receiving the cabin altitude caution message; we declared an emergency with ATC and initiated an emergency descent to 10000 ft. Given that the cabin altitude was at a normal 5000 ft prior to the malfunction; the cabin altitude caution message quickly appeared followed by an altitude warning; then the automatic deployment of the cabin oxygen masks. After the emergency descent was completed; we diverted to ZZZ which was only about 20 mi away. The remainder of the flight was completed uneventfully. The only additional problem was reported by the aft flight attendant whose drop-down oxygen mask did not properly deploy forcing her to get up from her jump seat.
Original NASA ASRS Text
Title: CRJ 700 BLEED DUCT FAILURE RESULTED IN AIR CONDITIONING PACK FAILURE. ACFT LOST CABIN PRESSURE AND EMER DESCENT WAS INITIATED TO A LANDING AT NEAREST ARPT.
Narrative: AT TOP OF CLB; RECEIVED R BLEED DUCT WARNING. IMMEDIATELY FEELING THE CABIN PRESSURE ANOMALIES; WE REQUESTED AND RECEIVED AN EXPEDITED DSCNT TO A LOWER ALT. BUT BEFORE WE COULD RUN THE APPLICABLE QRH PROC AND FOR REASONS UNKNOWN; BOTH PACKS WENT OFF LINE CAUSING A RAPID CLB IN CABIN ALT; APPROX 2500 FPM. UPON RECEIVING THE CABIN ALT CAUTION MESSAGE; WE DECLARED AN EMER WITH ATC AND INITIATED AN EMER DSCNT TO 10000 FT. GIVEN THAT THE CABIN ALT WAS AT A NORMAL 5000 FT PRIOR TO THE MALFUNCTION; THE CABIN ALT CAUTION MESSAGE QUICKLY APPEARED FOLLOWED BY AN ALT WARNING; THEN THE AUTO DEPLOYMENT OF THE CABIN OXYGEN MASKS. AFTER THE EMER DSCNT WAS COMPLETED; WE DIVERTED TO ZZZ WHICH WAS ONLY ABOUT 20 MI AWAY. THE REMAINDER OF THE FLT WAS COMPLETED UNEVENTFULLY. THE ONLY ADDITIONAL PROB WAS RPTED BY THE AFT FLT ATTENDANT WHOSE DROP-DOWN OXYGEN MASK DID NOT PROPERLY DEPLOY FORCING HER TO GET UP FROM HER JUMP SEAT.
Data retrieved from NASA's ASRS site as of January 2009 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.