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A LR60's right bleed valve malfunctioned allowing the cabin altitude to climb to 12;000 feet with the aircraft at FL24.7. With the right bleed off and the checklist completed the cabin stabilized so the crew climbed to FL410.
| Attributes | |
| ACN | 866136 |
| Time | |
| Date | 200912 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Learjet 60 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Pneumatic Valve/Bleed Valve |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
Between 17;000 feet and FL180 the fault light and press system light came on. At about FL247 the cabin altitude warning horn sounded but the warning light remained off. We started a descent and leveled at FL180. The cabin altitude reached a maximum of 12;000 -13;000 feet. I did the checklist and the cabin altitude stabilized with the right bleed air switch off. We stepped climbed back up to FL410 and called maintenance. We changed our destination in coordination with the team lead.
Original NASA ASRS Text
Title: A LR60's Right Bleed Valve malfunctioned allowing the cabin altitude to climb to 12;000 feet with the aircraft at FL24.7. With the Right Bleed OFF and the checklist completed the cabin stabilized so the crew climbed to FL410.
Narrative: Between 17;000 feet and FL180 the Fault light and Press System light came on. At about FL247 the Cabin Altitude Warning Horn sounded but the warning light remained off. We started a descent and leveled at FL180. The cabin altitude reached a maximum of 12;000 -13;000 feet. I did the checklist and the cabin altitude stabilized with the right bleed air switch off. We stepped climbed back up to FL410 and called maintenance. We changed our destination in coordination with the team lead.
Data retrieved from NASA's ASRS site as of April 2012 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.