B737 Next Generation Undifferentiated
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 119.42; Flight Crew Total 20487.75; Flight Crew Type 10487.75
Inflight Event / Encounter Wake Vortex Encounter
General None Reported / Taken
Environment - Non Weather Related; Procedure
Just prior to top of descent at FL 330 we experienced wake turbulence for 3-4 seconds. We went from smooth to light-mod turbulence according the iPad app. Seat belt sign was on. Flight attendants check-in PA was made and no injuries were reported. An aircraft was observed on TCAS 1;000 ft. above us perpendicular to our course. ATC was advised.
[Report narrative contained no additional information.]
B737NG flight crew reported encountering wake turbulence at FL330 in RJJJ airspace.