Narrative:

During approach at 7000 ft, extended slats and experienced roll to the left. Slat disagreement light remained illuminated. Performed checklist procedure and landed with slats retracted and flaps at 50 degrees. Callback conversation with reporter revealed the following information: the reporter stated the cause of the uncommanded roll was the failure of a leading edge slat anti-ice tee duct separating and jamming under the slat.

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Original NASA ASRS Text

Title: A DC9-30 ON APCH AT 7000 FT EXPERIENCED AN UNCOMMANDED ROLL WHEN THE LEADING EDGE SLATS WERE EXTENDED CAUSED BY A FAILED SLAT ANTI-ICE TEE DUCT JAMMED UNDER THE SLAT.

Narrative: DURING APCH AT 7000 FT, EXTENDED SLATS AND EXPERIENCED ROLL TO THE L. SLAT DISAGREEMENT LIGHT REMAINED ILLUMINATED. PERFORMED CHKLIST PROC AND LANDED WITH SLATS RETRACTED AND FLAPS AT 50 DEGS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE CAUSE OF THE UNCOMMANDED ROLL WAS THE FAILURE OF A LEADING EDGE SLAT ANTI-ICE TEE DUCT SEPARATING AND JAMMING UNDER THE SLAT.

Data retrieved from NASA's ASRS site as of July 2007 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.