B737-900
Flight Crew Air Transport Pilot (ATP)
Inflight Event / Encounter Wake Vortex Encounter; Inflight Event / Encounter Loss Of Aircraft Control
Air Traffic Control Issued New Clearance; Flight Crew Regained Aircraft Control; Flight Crew Took Evasive Action
Environment - Non Weather Related; Procedure
ATC cleared us to descend via the BDEGA1 arrival to SFO. NCT approach never issued us a runway to expect. (ATIS advised 28R/28L landings in use) We queried NCT as to runway assignment crossing CORKK. We immediately programmed runway 28L into FMC and proceeded to BRIXX. Shortly after passing CORKK we encountered significant wake turbulence resulting in instant 50 degree right bank. I disconnected automation and flew the airplane back to straight and level while FO requested heading of 170 to avoid additional wake. ATC advised a left turn to 110 degrees to avoid departure traffic.Wake turbulence.
Shortly after passing CORKK intersection we experienced wake turbulence from the preceding B777. The wake turbulence threw the aircraft into a 45-50 degree right bank. The captain got control of the aircraft and immediately deviated right of course to avoid further wake turbulence. We communicated the wake turbulence and current deviation right of course to a heading of 170 to NCT. NCT then vectored us off the arrival path and for an approach into SFO without further incident. Not enough separation from a heavy aircraft. Wake turbulence seems to be more pronounced with non-winglets aircraft.
B737-900 flight crew reported encountering wake turbulence on arrival from preceding B777 into SFO; which resulted in a 50 degree right bank.