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A BAE125-800 at FL320 encountered a strong updraft followed by a downdraft which forced the aircraft initially up to FL326 then down to FL310 before the crew recovered to FL320.
| Attributes | |
| ACN | 852583 |
| Time | |
| Date | 200909 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Light | Dusk |
| Aircraft 1 | |
| Make Model Name | BAe 125 Series 800 |
| Operating Under FAR Part | Part 135 |
| 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 Multiengine |
| Experience | Flight Crew Last 90 Days 75 Flight Crew Total 20000 Flight Crew Type 400 |
| Events | |
| Anomaly | Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Weather / Turbulence |
Narrative:
Flying at 32;000 ft in cloud with lightning below left and right. No thunderstorms reported by ATC and nothing showing on the radar. Encountered a strong updraft and heavy precipitation; aircraft on autopilot climbed rapidly 600 ft to 32;600 ft then started a rapid descent due to downdraft. As aircraft descended through 31;700 ft autopilot was disengaged. Aircraft continued to descend to 31;000 ft and then a recovery was made back to 32;000. No conflict of other traffic. We told ATC of our deviation and that it was weather related. No further action.
Original NASA ASRS Text
Title: A BAE125-800 at FL320 encountered a strong updraft followed by a downdraft which forced the aircraft initially up to FL326 then down to FL310 before the crew recovered to FL320.
Narrative: Flying at 32;000 FT in cloud with lightning below left and right. No thunderstorms reported by ATC and nothing showing on the radar. Encountered a strong updraft and heavy precipitation; aircraft on autopilot climbed rapidly 600 FT to 32;600 FT then started a rapid descent due to downdraft. As aircraft descended through 31;700 FT autopilot was disengaged. Aircraft continued to descend to 31;000 FT and then a recovery was made back to 32;000. No conflict of other traffic. We told ATC of our deviation and that it was weather related. No further action.
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.