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B737-800 first officer experiences a momentary overspeed at FL410 while passing over thunderstorms at night.
| Attributes | |
| ACN | 973859 |
| Time | |
| Date | 201110 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZMP.ARTCC |
| State Reference | MN |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Flying First Officer |
| Events | |
| Anomaly | Deviation - Speed All Types Inflight Event / Encounter Weather / Turbulence |
Narrative:
Cruising at fl 410; diverting off track to clear thunderstorms in the area. Still in the clear above the activity; and just passing over the greatest intensity of storms; got some strong up and down drafts that caused the airspeed to increase sharply. Was immediately on the power levers and the speed brakes but was unable to keep from exceeding max vmo. Warning sounded for only 1 second and speed decreased back into the envelope.
Original NASA ASRS Text
Title: B737-800 First Officer experiences a momentary overspeed at FL410 while passing over thunderstorms at night.
Narrative: Cruising at FL 410; diverting off track to clear thunderstorms in the area. Still in the clear above the activity; and just passing over the greatest intensity of storms; got some strong up and down drafts that caused the airspeed to increase sharply. Was immediately on the power levers and the Speed brakes but was unable to keep from exceeding Max Vmo. Warning sounded for only 1 second and speed decreased back into the envelope.
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.