Regional Jet 200 ER/LR (CRJ200)
Flight Crew Air Transport Pilot (ATP)
Inflight Event / Encounter Wake Vortex Encounter
Flight Crew Took Evasive Action
Environment - Non Weather Related; Procedure
While on the Dirty Arrival descending through 13;000 FT; we experienced severe wake turbulence 6 miles in trail and 1000 feet above a B747. We notified ATC and requested to level at 12;500 feet and slow from 280 knots to 250 knots. We did that; continued arrival and landed without event.We experienced an undesired aircraft state. I believe the B747 was very heavy and the afternoon heat; lifting action and convective activity contributed to the wake turbulence.
CRJ-200 Captain reported encountering 'severe' wake turbulence 6 miles in trail of a B747 on the DIRTY arrival into ATL.