Narrative:

The issue began when we were over-fueled. I decided we would burn off the extra fuel enroute to avoid landing overweight. When in the approach phase on the downwind; spoilers were fully deployed; flaps were set to 20 degrees and the gear was down; all in an effort to burn the excess fuel. We were in IMC with occasional light chop and the speed was originally bugged at 190 knots. I chose to bug 170 knots with the mindset of getting the flaps to 30 degrees. Prior to selecting flaps to 30 we encountered a moderate turbulent bump as I was simultaneously retracting the flight spoilers to zero. As soon as I retracted the flight spoilers to zero; we encountered another moderate bump and then the stick shaker activated. The autopilot disengaged and I manually took control of the airplane; adding power. Once the situation was resolved; the autopilot was re-engaged. We were in icing conditions; and had been for nearly 10 minutes. I'm sure the ice was a contributing factor to increasing the stalling margins.

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Original NASA ASRS Text

Title: CRJ-200 flight crew reported experiencing a stick shaker in flight while on initial approach. Flight dynamics were degraded by icing.

Narrative: The issue began when we were over-fueled. I decided we would burn off the extra fuel enroute to avoid landing overweight. When in the approach phase on the downwind; spoilers were fully deployed; flaps were set to 20 degrees and the gear was down; all in an effort to burn the excess fuel. We were in IMC with occasional light chop and the speed was originally bugged at 190 knots. I chose to bug 170 knots with the mindset of getting the flaps to 30 degrees. Prior to selecting flaps to 30 we encountered a moderate turbulent bump as I was simultaneously retracting the flight spoilers to zero. As soon as I retracted the flight spoilers to zero; we encountered another moderate bump and then the stick shaker activated. The autopilot disengaged and I manually took control of the airplane; adding power. once the situation was resolved; the autopilot was re-engaged. We were in icing conditions; and had been for nearly 10 minutes. I'm sure the ice was a contributing factor to increasing the stalling margins.

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.