Crj-200 flight crew reported encountering wake turbulence that resulted in rolls to left and right w...

Attributes
ACN	1199111
Time
Date	201408
Local Time Of Day	0601-1200
Place
Locale Reference	ATL.Airport
State Reference	GA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet 200 ER/LR (CRJ200)
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR DIRTY2
Flight Plan	IFR
Aircraft 2
Make Model Name	Boeing Company Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Person 1
Function	Pilot Flying First Officer
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Altitude Excursion From Assigned Altitude Inflight Event / Encounter Wake Vortex Encounter

Narrative:

On the DIRTY2 arrival level at 12;000 ft and 250 KTS we felt a few bumps on what had been a smooth ride up until then. A few more bumps occurred that were comparable to light chop. We queried ATC if there was an aircraft in front of us. They told us there was a B737 [or B757] ahead at the same altitude. About the same time the aircraft rolled about 10 degrees or so to the left and came back to level. Then about 20 degrees or so right bank and corrected. Another roll brought us even further over; I'm guessing over 30 degrees to the right and corrected. The autopilot was engaged and was making very rapid control movement beyond what I have seen before. I disconnected the autopilot at that time and hand flew through another roll or two while the pilot not flying requested a heading off of the arrival to get out of the wake turbulence. During the hand flying in the turbulence and [while in the] 20 [degrees] right [turn] ATC heading the aircraft got off altitude 100 ft high. This was quickly corrected and automation was re-established. The ride improved as soon as we were vectored off the arrival course. ATC then brought us back to the arrival and we landed without further incident.

Original NASA ASRS Text

Title: CRJ-200 flight crew reported encountering wake turbulence that resulted in rolls to left and right while in trail of a narrow body Boeing during arrival to ATL. ATC provided a turn off course.

Narrative: On the DIRTY2 arrival level at 12;000 FT and 250 KTS we felt a few bumps on what had been a smooth ride up until then. A few more bumps occurred that were comparable to light chop. We queried ATC if there was an aircraft in front of us. They told us there was a B737 [or B757] ahead at the same altitude. About the same time the aircraft rolled about 10 degrees or so to the left and came back to level. Then about 20 degrees or so right bank and corrected. Another roll brought us even further over; I'm guessing over 30 degrees to the right and corrected. The autopilot was engaged and was making very rapid control movement beyond what I have seen before. I disconnected the autopilot at that time and hand flew through another roll or two while the pilot not flying requested a heading off of the arrival to get out of the wake turbulence. During the hand flying in the turbulence and [while in the] 20 [degrees] right [turn] ATC heading the aircraft got off altitude 100 FT high. This was quickly corrected and automation was re-established. The ride improved as soon as we were vectored off the arrival course. ATC then brought us back to the arrival and we landed without further incident.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Crj-200 flight crew reported encountering wake turbulence that resulted in rolls to left and right while in trail of a narrow body boeing during arrival to atl. ATC provided a turn off course.