 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Bombardier crj-900 flight crew reported an inflight loss of cabin pressurization due to a bleed duct malfunction.
| Attributes | |
| ACN | 1526164 |
| Time | |
| Date | 201803 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Regional Jet 900 (CRJ900) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Pneumatic System Control |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
While setting up the airplane for the flight we noticed a duct mon fault EICAS. This was deferred by maintenance and MEL over the phone. The deferral removed system redundancy. Approaching FL270 we got a left bleed duct master warning EICAS. The anti-ice and leak detection control system shut the valve coming from each engine which resulted in an eventual depressurization of the aircraft. The captain was pilot monitoring. He executed the steps in the QRH while the first officer; pilot flying; took the radios and requested a descent to 10;000 feet as the QRH instructed. Soon after; we made the decision to divert to [a nearby alternate] as our company has a maintenance base there. We made failed attempts to get in touch with company maintenance and dispatch on arinc and ACARS. The cabin altitude began increasing as we expected from the depressurization called for by the QRH. The captain kept in communication with the flight attendants to keep them informed of our situation. The masks dropped for the passengers as we expected. We [advised] approach to get priority handling as we had trouble with center getting the altitude we needed. We landed with no further issues.
Original NASA ASRS Text
Title: Bombardier CRJ-900 flight crew reported an inflight loss of cabin pressurization due to a bleed duct malfunction.
Narrative: While setting up the airplane for the flight we noticed a DUCT MON FAULT EICAS. This was deferred by Maintenance and MEL over the phone. The deferral removed system redundancy. Approaching FL270 we got a L BLEED DUCT master warning EICAS. The anti-ice and leak detection control system shut the valve coming from each engine which resulted in an eventual depressurization of the aircraft. The Captain was pilot monitoring. He executed the steps in the QRH while the First Officer; pilot flying; took the radios and requested a descent to 10;000 feet as the QRH instructed. Soon after; we made the decision to divert to [a nearby alternate] as our Company has a maintenance base there. We made failed attempts to get in touch with Company Maintenance and Dispatch on ARINC and ACARS. The cabin altitude began increasing as we expected from the depressurization called for by the QRH. The Captain kept in communication with the Flight Attendants to keep them informed of our situation. The masks dropped for the passengers as we expected. We [advised] Approach to get priority handling as we had trouble with Center getting the altitude we needed. We landed with no further issues.
Data retrieved from NASA's ASRS site 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.