Narrative:

We had a wake turbulence encounter at FL340 on an airway in the vicinity of iso. We were in VMC and saw the other aircraft; a B-777; pass 1;000 ft above us going the opposite direction on the airway. Several seconds later the aircraft buffeted slightly; which is not unusual; but then the aircraft rolled about 40 degrees to the right. I disengaged the autopilot and put in opposite control inputs to correct back to a wings level attitude. At the same time; the airspeed footer rose to the aircraft's current speed and the stick shaker activated momentarily. The auto throttles increased power; the stick shaker stopped; and the footer quickly returned to where it had been before; so I did not feel the need to disconnect the auto throttles. We turned on the seat belt sign; and then called the flight attendants to see if they and the passengers were okay. They stated they were okay; and after checking with the passengers; no injuries were reported. When winds aloft are light; consider offsetting track slightly when passing heavy aircraft directly above.

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Original NASA ASRS Text

Title: B717 had a wake vortex encounter at FL340 with an opposite direction B777 at FL350.

Narrative: We had a wake turbulence encounter at FL340 on an airway in the vicinity of ISO. We were in VMC and saw the other aircraft; a B-777; pass 1;000 FT above us going the opposite direction on the airway. Several seconds later the aircraft buffeted slightly; which is not unusual; but then the aircraft rolled about 40 degrees to the right. I disengaged the autopilot and put in opposite control inputs to correct back to a wings level attitude. At the same time; the airspeed footer rose to the aircraft's current speed and the stick shaker activated momentarily. The auto throttles increased power; the stick shaker stopped; and the footer quickly returned to where it had been before; so I did not feel the need to disconnect the auto throttles. We turned on the seat belt sign; and then called the flight attendants to see if they and the passengers were okay. They stated they were okay; and after checking with the passengers; no injuries were reported. When winds aloft are light; consider offsetting track slightly when passing heavy aircraft directly above.

Data retrieved from NASA's ASRS site as of July 2013 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.