Flight Crew Air Transport Pilot (ATP)
Deviation - Altitude Excursion From Assigned Altitude; Inflight Event / Encounter Wake Vortex Encounter
Air Traffic Control Issued New Clearance
Environment - Non Weather Related; Procedure
We were on the KLNDR2 RNAV ARRIVAL into DFW just prior to DIETZ at 11;000 FT when we encountered some extreme wake turbulence. The wake turbulence rolled the aircraft; pitched downward; and disconnected the autopilot. We immediately informed ATC of the situation and started to level the aircraft at approximately 10;700 FT. ATC immediately gave us a descent to 8;000 FT so we continued on down. We were told that we were six miles in trail of a 737. The event occurred due to not enough separation between us and the 737. After speaking with ATC on the telephone; they did not think that a 737 wake could be that strong. I believe more separation would avoid future events.
EMB-145 Captain reported 'extreme' wake turbulence six miles in trail of a B737 on arrival into DFW.