Narrative:

We were being vectored to intercept the 35 localizer into msp. We were not advised of what type of aircraft we were following. After leveling off at 6000 ft; approximately 18 miles from the airport and on a heading to intercept; we experienced a roll to the left followed by a roll to the right. Bank angle was approximately 10 degrees in both directions. Once stabilized; I queried ATC as to what type of aircraft we were following. The reply was a boeing 757. No other disruptions occurred the remainder of the flight. Once on the ground; the flight attendant notified me that she was standing in the galley when we flew through the wake turbulence and had hit her back on the bulkhead. I asked if she was injured; she said she no and would continue with the trip. We flew three more legs before we landed for the night. The next morning the flight attendant called me to say her back was very sore and stiff and that one foot felt warmer than the other. She had already notified her supervisor and arrangements we made for her to see a doctor once we arrived back at base. Even though we had proper separation from the preceding B-757; we were still affected by the wake turbulence from that aircraft. The flight attendant was injured due to flying through wake turbulence of a B-757.

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Original NASA ASRS Text

Title: A CRJ-200 encountered a B757's wake at an acceptable separation distance while being vectored for an approach at 6;000 FT. A flight attendant's back was injured after she struck a bulkhead during the incident.

Narrative: We were being vectored to intercept the 35 LOC into MSP. We were not advised of what type of aircraft we were following. After leveling off at 6000 FT; approximately 18 miles from the airport and on a heading to intercept; we experienced a roll to the left followed by a roll to the right. Bank angle was approximately 10 degrees in both directions. Once stabilized; I queried ATC as to what type of aircraft we were following. The reply was a Boeing 757. No other disruptions occurred the remainder of the flight. Once on the ground; the flight attendant notified me that she was standing in the galley when we flew through the wake turbulence and had hit her back on the bulkhead. I asked if she was injured; she said she no and would continue with the trip. We flew three more legs before we landed for the night. The next morning the Flight Attendant called me to say her back was very sore and stiff and that one foot felt warmer than the other. She had already notified her supervisor and arrangements we made for her to see a doctor once we arrived back at base. Even though we had proper separation from the preceding B-757; we were still affected by the wake turbulence from that aircraft. The Flight Attendant was injured due to flying through wake turbulence of a B-757.

Data retrieved from NASA's ASRS site as of April 2012 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.