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Air carrier captain reported encountering wake turbulence at FL340 when a widebody transport aircraft crossed their path 20 miles ahead of them that resulted in an uncommanded 45 degree bank.
| Attributes | |
| ACN | 1286392 |
| Time | |
| Date | 201508 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZDC.ARTCC |
| State Reference | VA |
| Environment | |
| Flight Conditions | Mixed |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Widebody Transport |
| Person 1 | |
| Function | Captain |
| Experience | Flight Crew Last 90 Days 174 Flight Crew Type 11000 |
| Events | |
| Anomaly | Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
While at level cruise at FL340 in a mostly smooth ride; we experienced sudden moderate turbulence with an abrupt right roll to 45 degrees of bank. The autopilot disengaged; and we made manual control inputs to return to level flight. The turbulence lasted for about five seconds. No passengers or crew were injured. We reported the event to ATC; but I do not recall if we were talking to boston or new york ARTCC. The controller said a [widebody transport] had crossed our path about 20 miles in front of us. He did not mention it because he thought the heavy traffic was far enough away to not be a factor. We were in and out of IMC; so we never saw the [widebody transport]. We did have a 60-knot headwind.my recollection of our position [during] the event is vague; but it was near the coast in the atlantic city to baltimore area.
Original NASA ASRS Text
Title: Air carrier Captain reported encountering wake turbulence at FL340 when a Widebody Transport aircraft crossed their path 20 miles ahead of them that resulted in an uncommanded 45 degree bank.
Narrative: While at level cruise at FL340 in a mostly smooth ride; we experienced sudden moderate turbulence with an abrupt right roll to 45 degrees of bank. The autopilot disengaged; and we made manual control inputs to return to level flight. The turbulence lasted for about five seconds. No Passengers or Crew were injured. We reported the event to ATC; but I do not recall if we were talking to Boston or New York ARTCC. The Controller said a [Widebody Transport] had crossed our path about 20 miles in front of us. He did not mention it because he thought the heavy traffic was far enough away to not be a factor. We were in and out of IMC; so we never saw the [Widebody Transport]. We did have a 60-knot headwind.My recollection of our position [during] the event is vague; but it was near the coast in the Atlantic City to Baltimore area.
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.