B767 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Deviation - Speed All Types; Inflight Event / Encounter Wake Vortex Encounter
General None Reported / Taken
Environment - Non Weather Related; Procedure
We were established on final a few miles outside of the FAF. All was as it should be. We were stable on the localizer at 170 knots with flaps 15 autopilot on. Winds were 210 at 50 knots; steady. In a split second we went from straight and level to a left hand bank I'm guessing 20 degrees maybe more and the hook came up and we got a momentary stick shaker. As it happened I added power as we rolled wings level. We were about 20 degrees off heading; but the autopilot recovered to intercept the localizer; and we never lost any altitude. Like I said; it happened so quickly and recovered that I saw no need to disconnect the autopilot. We re-intercepted the localizer followed by the glide slope and shot the approach with no other concerns. I'm not sure if the winds were the reason or we hit someone's wake turbulence. I'm guessing it was wake turbulence. [Cause:] not sure - perhaps wake turbulence. The winds were strong but steady. 210 at 50 knots at 3000 ft. Perhaps ATC had us too close; but as I recall my traffic was a 757; 7 miles ahead; maybe it was wake from a plane on the parallel runway.
B767 Captain reported encountering probable wake turbulence on approach to MEM.