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A canadair cl-65 departed with the right pack deferred and the left pack tripped off at 9000 ft with high pressure message. After pack reset was unable to maintain cabin pressure.
| Attributes | |
| ACN | 600730 |
| Time | |
| Date | 200311 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 9000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : zzz.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet CL65, Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | oversight : pic |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 120 flight time total : 5780 flight time type : 3435 |
| ASRS Report | 600730 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : eicas-high press warning other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance flight crew : diverted to another airport |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft Chart Or Publication |
| Primary Problem | Aircraft |
Narrative:
Our flight departed ZZZ with the right air conditioning pack deferred and the left pack being fed from the APU. While reconfiguring the left pack bleed feed from the APU to the engines, we received a left pack high pressure message and the pack shut down. After the left pack was reset and brought back on-line, air flow was less than normal and the aircraft did not maintain adequate pressurization for continued climb to cruise altitude. We returned to ZZZ for an uneventful approach and landing. Maintenance determined that the initial left pack high pressure event had damaged the duct work causing loss of cabin air flow.
Original NASA ASRS Text
Title: A CANADAIR CL-65 DEPARTED WITH THE R PACK DEFERRED AND THE L PACK TRIPPED OFF AT 9000 FT WITH HIGH PRESSURE MESSAGE. AFTER PACK RESET WAS UNABLE TO MAINTAIN CABIN PRESSURE.
Narrative: OUR FLT DEPARTED ZZZ WITH THE R AIR CONDITIONING PACK DEFERRED AND THE L PACK BEING FED FROM THE APU. WHILE RECONFIGURING THE L PACK BLEED FEED FROM THE APU TO THE ENGS, WE RECEIVED A L PACK HIGH PRESSURE MESSAGE AND THE PACK SHUT DOWN. AFTER THE L PACK WAS RESET AND BROUGHT BACK ON-LINE, AIR FLOW WAS LESS THAN NORMAL AND THE ACFT DID NOT MAINTAIN ADEQUATE PRESSURIZATION FOR CONTINUED CLB TO CRUISE ALT. WE RETURNED TO ZZZ FOR AN UNEVENTFUL APCH AND LNDG. MAINT DETERMINED THAT THE INITIAL L PACK HIGH PRESSURE EVENT HAD DAMAGED THE DUCT WORK CAUSING LOSS OF CABIN AIR FLOW.
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.