B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Type 6701
Deviation - Altitude Excursion From Assigned Altitude; Inflight Event / Encounter Loss Of Aircraft Control; Inflight Event / Encounter Wake Vortex Encounter
Flight Crew Regained Aircraft Control
Environment - Non Weather Related
Twenty miles in trail of a B777 [at FL340]; we got an uncommanded aircraft roll to the right and altitude loss from wake turbulence.
Reporter stated wake encounter was in the vicinity of ORF at FL340.
B737 Captain reported his aircraft rolled right and descended after encountering wake turbulence in trail of a B777 at FL340.