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A challenger 300 captain reported encountering severe turbulence in cruise flight at FL400 that resulted in a 35 degree roll and a 500 foot altitude excursion.
| Attributes | |
| ACN | 1278467 |
| Time | |
| Date | 201507 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZAU.ARTCC |
| State Reference | IL |
| Aircraft 1 | |
| Make Model Name | Challenger 300 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Cruise |
| Route In Use | Direct |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Multiengine Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 80 Flight Crew Total 13500 Flight Crew Type 2500 |
| Events | |
| Anomaly | Deviation - Altitude Excursion From Assigned Altitude Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Weather / Turbulence |
Narrative:
Cruising at 40;000 feet we were in between tops of cells estimated at 41;000 feet. Distance between cells 20 miles estimated. Nothing of a return on radar to speak of. Got a little light turbulence when we received a very hard; severe shot of turbulence. The autopilot kicked off; the plane rolled approx 35 degrees and a sudden loss of altitude of approx 500 feet to 39;500 feet. I was the pilot flying; got control of the plane and was back at altitude in less than 30 seconds. ATC inquired as to what was going on; we explained and were instructed to 'maintain 400'. We did; no problem; and continued the flight. Nothing more was said and this was a case of turbulence I have not experienced in over 15 years.
Original NASA ASRS Text
Title: A Challenger 300 Captain reported encountering severe turbulence in cruise flight at FL400 that resulted in a 35 degree roll and a 500 foot altitude excursion.
Narrative: Cruising at 40;000 feet we were in between tops of cells estimated at 41;000 feet. Distance between cells 20 miles estimated. Nothing of a return on radar to speak of. Got a little light turbulence when we received a very hard; severe shot of turbulence. The Autopilot kicked off; the plane rolled approx 35 degrees and a sudden loss of altitude of approx 500 feet to 39;500 feet. I was the pilot flying; got control of the plane and was back at altitude in less than 30 seconds. ATC inquired as to what was going on; we explained and were instructed to 'maintain 400'. We did; no problem; and continued the flight. Nothing more was said and this was a case of turbulence I have not experienced in over 15 years.
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.