Narrative:

Departing mia, leading edge flaps/slats would not retract on schedule. Declared emergency, accomplished flight control abnormal checklist and landed in mia overweight. Aircraft involved had a history of same malfunction.

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Original NASA ASRS Text

Title: A B737 IS MANDATED TO RETURN AND LAND WHEN A RECURRING PROB ARISES OF MALFUNCTIONING LEADING EDGE DEVICES AFTER TKOF FROM MIA, FL.

Narrative: DEPARTING MIA, LEADING EDGE FLAPS/SLATS WOULD NOT RETRACT ON SCHEDULE. DECLARED EMER, ACCOMPLISHED FLT CTL ABNORMAL CHKLIST AND LANDED IN MIA OVERWT. ACFT INVOLVED HAD A HISTORY OF SAME MALFUNCTION.

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.