B757-200
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Inflight Event / Encounter Loss Of Aircraft Control; Inflight Event / Encounter Wake Vortex Encounter
General None Reported / Taken
Environment - Non Weather Related; Procedure
On vector base turn to ILS 36R MEM at 2000 feet. I noticed autopilot was struggling. I suspected wake turbulence. I disconnected the autopilot when the aircraft was slow to respond in roll. It snapped right wing down to 45 degrees then back. We were in trail of a 767; which flew our approximate track previously. Spacing behind heavies is allowed to be too close in my opinion.Suggestions: Increase spacing between heavy and lighter aircraft.
Reporter stated these events are occurring because of ATC efforts to increase aircraft acceptance rates. Problems occur on departures also. Reporter hasn't submitted reports for all encounters because there are just too many.
B757-200 Captain reported encountering wake turbulence on approach to MEM in trail of a B767.