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787 captain reported encountering a wind shear at FL400 resulting in airspeed exceedance; deviation from assigned altitude and loss of auto throttles.
| Attributes | |
| ACN | 1615349 |
| Time | |
| Date | 201902 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B787 Dreamliner Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Route In Use | Oceanic |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 210 Flight Crew Total 11977 Flight Crew Type 1682 |
| Events | |
| Anomaly | Deviation - Altitude Excursion From Assigned Altitude Deviation - Speed All Types Inflight Event / Encounter Weather / Turbulence Inflight Event / Encounter Loss Of Aircraft Control |
Narrative:
Encountered severe wave at FL410. Throttles moved to idle as airspeed increased. Autopilot was disconnected as aircraft climbed 900 feet. Speed brakes were extended; but airspeed exceeded mmo and vmo. We exited the wave and continued without any further events.
Original NASA ASRS Text
Title: 787 Captain reported encountering a wind shear at FL400 resulting in airspeed exceedance; deviation from assigned altitude and loss of auto throttles.
Narrative: Encountered severe wave at FL410. Throttles moved to idle as airspeed increased. Autopilot was disconnected as aircraft climbed 900 feet. Speed brakes were extended; but airspeed exceeded MMO and VMO. We exited the wave and continued without any further events.
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.