Crj-700 first officer reported encountering 'very strong' wake turbulence on approach to atl eight m...

Narrative:

We encountered 2 to 3 separate wake turbulence events following a 757 into atlanta. The first one was approximately 8 miles in trail and it was very strong rolling motions that needed the autopilot to be disconnected going through 13;300 on the arrival. The second one was a very strong rolling motion and we informed ATC we needed more separation from the aircraft in front of us. They then slowed us to 180 knots on downwind. We were still 5 miles separation at this point and we received the 3rd wake turbulence which was the strongest rolling tendency. ATC wanted us to expedite our descent so we could keep our position in line and stay behind the 757. We declined; so they re-sequenced us.reduced separation from 757 aircraft; in my opinion; is not a safe strategy. This was the strongest wake turbulence I have ever felt and it was very unnerving. ATC needs to be more receptive to wake turbulence [reports] and when you have already stated that you have had several severe wake turbulence events following an aircraft they should not try and get you to expedite your descent to stay in trail of the aircraft that has already caused the wake turbulence.

Original NASA ASRS Text

Title: CRJ-700 FO reported encountering 'very strong' wake turbulence on approach to ATL eight miles in trail of a B757. Reporter would like to see a more positive response from ATC when wake encounters are reported.

Narrative: We encountered 2 to 3 separate wake turbulence events following a 757 into Atlanta. The first one was approximately 8 miles in trail and it was very strong rolling motions that needed the autopilot to be disconnected going through 13;300 on the arrival. The second one was a very strong rolling motion and we informed ATC we needed more separation from the aircraft in front of us. They then slowed us to 180 knots on downwind. We were still 5 miles separation at this point and we received the 3rd wake turbulence which was the strongest rolling tendency. ATC wanted us to expedite our descent so we could keep our position in line and stay behind the 757. We declined; so they re-sequenced us.Reduced separation from 757 aircraft; in my opinion; is not a safe strategy. This was the strongest wake turbulence I have ever felt and it was very unnerving. ATC needs to be more receptive to wake turbulence [reports] and when you have already stated that you have had several severe wake turbulence events following an aircraft they should not try and get you to expedite your descent to stay in trail of the aircraft that has already caused the wake turbulence.

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.

Attributes
ACN	1271245
Time
Date	201506
Local Time Of Day	1801-2400
Place
Locale Reference	ATL.Airport
State Reference	GA
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Make Model Name	Regional Jet 700 ER/LR (CRJ700)
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Aircraft 2
Make Model Name	B757 Undifferentiated or Other Model
Flight Phase	Descent
Flight Plan	IFR
Person 1
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Wake Vortex Encounter

Crj-700 first officer reported encountering 'very strong' wake turbulence on approach to atl eight miles in trail of a B757. Reporter would like to see a more positive response from ATC when wake encounters are reported.