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Gulfstream iv captain reported an upset with a 45 degree bank from wake turbulence in trail of an md-11 at FL340.
| Attributes | |
| ACN | 1271375 |
| Time | |
| Date | 201506 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZLA.ARTCC |
| State Reference | CA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Gulfstream IV / G350 / G450 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Climb |
| Route In Use | Direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | MD-11 |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 90 Flight Crew Total 11500 Flight Crew Type 900 |
| Events | |
| Anomaly | Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
We were in a climb 'direct' to drk VOR in the vicinity of psp at .75 mach going through about FL340 climbing to FL410 when we encountered an upset from wake turbulence. Autopilot and yaw damper disengaged. The aircraft rolled about 45 degrees left with moderate to severe turbulence. I manually steered the aircraft to the left off course and we advised ATC of the encounter. ATC responded that we were following a 'heavy jet ahead' (I believe it was an md-11) and the ATC authorized an offset. We re-engaged the automation with a 2 NM left lateral offset.
Original NASA ASRS Text
Title: Gulfstream IV Captain reported an upset with a 45 degree bank from wake turbulence in trail of an MD-11 at FL340.
Narrative: We were in a climb 'Direct' to DRK VOR in the vicinity of PSP at .75 Mach going through about FL340 climbing to FL410 when we encountered an upset from wake turbulence. Autopilot and yaw damper disengaged. The aircraft rolled about 45 degrees left with moderate to severe turbulence. I manually steered the aircraft to the left off course and we advised ATC of the encounter. ATC responded that we were following a 'Heavy Jet Ahead' (I believe it was an MD-11) and the ATC authorized an offset. We re-engaged the automation with a 2 NM left lateral offset.
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.