What was found
LEADING EDGE SLATS TRANSIT LIGHT STAYS ON 7 LIGHT INITIALLY EXTINGUI SHED AFTER FLAP CYCLE PE R QRH. THEN LI GHT CAME O N STEADY MID FLIGHT. ACPD BITE TEST OF FSCU. FOUND NO EXISTING FAULTS. FLT LEG 0 SHOWED #7 SLAT INBD. "FAR" TARGET AT SENSOR S1007. CLEANED SENSOR AND CHECKED WIRING AND FOUND NO DEFECTS. CYCLED SLATS SEVERAL TIMES AND COULD NOT DUPLICATE PROBLEM. AIRCRAFT OK FOR CONTINUED SVC.