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B737-800 captain reported airspeed and altitude excursions occurred during severe turbulence at FL410 while skirting thunderstorms.
| Attributes | |
| ACN | 1652973 |
| Time | |
| Date | 201906 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZJX.ARTCC |
| State Reference | FL |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Total 19000 |
| Events | |
| Anomaly | Deviation - Altitude Excursion From Assigned Altitude Deviation - Speed All Types Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Weather / Turbulence |
Narrative:
[ZZZ] to phl. Many thunderstorms enroute. Flight plan and path went up the east coast over land; no water routes. Aircraft was dispatched with a light load of passengers and 41;000 feet final altitude. Our path paralleled some of these fronts carrying thunderstorms and convective activity. 30NW of sav we were on top of this weather above a solid layer. We met an updraft of air that took us up to an altitude 41;500 feet in what we considered severe turbulence. Airspeed over speed was encountered; then an under speed was [encountered] with this upset recovery. A request for lower was [made] and [we were] given 37;000 feet. Leveling 37;000 feet the autopilot was turned back on and a verification of status of flight attendants and people were made to see anyone was hurt. Nobody was hurt.flying among huge unstable weather masses. Even though we had the weather radar on and the turbulence was not being depicted we still encountered rough air. If I could re-do this I would have stayed at a lower altitude and given a wider berth to the weather. Also; I would have asked ATC for more updates on their ride reports and paths that traffic in front was using to get around some of the weather.
Original NASA ASRS Text
Title: B737-800 Captain reported airspeed and altitude excursions occurred during severe turbulence at FL410 while skirting thunderstorms.
Narrative: [ZZZ] to PHL. Many thunderstorms enroute. Flight plan and path went up the east coast over land; no water routes. Aircraft was dispatched with a light load of passengers and 41;000 feet final altitude. Our path paralleled some of these fronts carrying thunderstorms and convective activity. 30NW of SAV we were on top of this weather above a solid layer. We met an updraft of air that took us up to an altitude 41;500 feet in what we considered severe turbulence. Airspeed over speed was encountered; then an under speed was [encountered] with this upset recovery. A request for lower was [made] and [we were] given 37;000 feet. Leveling 37;000 feet the autopilot was turned back on and a verification of status of flight attendants and people were made to see anyone was hurt. Nobody was hurt.Flying among huge unstable weather masses. Even though we had the weather radar on and the turbulence was not being depicted we still encountered rough air. If I could re-do this I would have stayed at a lower altitude and given a wider berth to the weather. Also; I would have asked ATC for more updates on their ride reports and paths that traffic in front was using to get around some of the weather.
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.