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B737 captain reported encountering wake turbulence at FL340 8-10 miles in trail of a B777 that resulted in a 'sharp' 45-50 degree roll to the left.
| Attributes | |
| ACN | 1450467 |
| Time | |
| Date | 201705 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZNY.ARTCC |
| State Reference | NY |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737 Next Generation Undifferentiated |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B777-300 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Type 5423 |
| Events | |
| Anomaly | Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
ATC instructed us to climb from FL320 [to] FL340; we were IMC. Upon reaching close to FL340 aircraft suddenly encountered wake turbulence and rolled sharply to the left; autopilot disconnected and we received aural 'bank angle' warning. I believe the aircraft was around 45-50 degrees bank. I rolled wings level; we notified ATC; offset to the left and began a descent back to FL320. The seatbelt sign was on at the time. We called back to flight attendants who reported no injuries; but said one passenger was standing in the aft of aircraft and fell over. ATC informed us the traffic ahead of us was a 777-300 at FL340. I believe we were around 8-10 miles in trail. ATC offered us a climb or descent and offset up to 4 miles. We experienced no further wake after the initial event.
Original NASA ASRS Text
Title: B737 Captain reported encountering wake turbulence at FL340 8-10 miles in trail of a B777 that resulted in a 'sharp' 45-50 degree roll to the left.
Narrative: ATC instructed us to climb from FL320 [to] FL340; we were IMC. Upon reaching close to FL340 aircraft suddenly encountered wake turbulence and rolled sharply to the left; autopilot disconnected and we received aural 'bank angle' warning. I believe the aircraft was around 45-50 degrees bank. I rolled wings level; we notified ATC; offset to the left and began a descent back to FL320. The seatbelt sign was on at the time. We called back to Flight Attendants who reported no injuries; but said one passenger was standing in the aft of aircraft and fell over. ATC informed us the traffic ahead of us was a 777-300 at FL340. I believe we were around 8-10 miles in trail. ATC offered us a climb or descent and offset up to 4 miles. We experienced no further wake after the initial event.
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.