What was found
MBJ/ATL - FLT JM 053 - AIRCRAFT RETURNED TO RAMP DUE TO A RECURRENCE OF A SLAT/FLAP DISAGREEMENT LIGHT INDICATION FAULT AT 18,000 FEET. THE AIRCRAFT WAS ACCELERATED TO 280 KNOTS AND THE SLAT OVERSPEED AURAL WARNING CAME ON. QRH PROCEDURE ACCOMPLISHED, ACFT RETURNED TO GATE. MAINT PERFORMED A B.I.T.E. TEST ON PROXIMITY DETECTOR BOX. THE D-SENSOR ON RT WING WAS AT FAULT. SENSOR REMOVED AND ON INSP, A LOT OF GREASE REMOVED FROM THE SURFACE OF THE SENSOR. SENSOR RE-INSTALLED, SLATS OPERATED SEVERAL TIMES IAW MM 27-80-00 AND 27-80-06, AND FOUND SERVICEABLE. NOTE: THE LT TARGET SENSOR D-TARGET PLATE WAS ALSO FOUND LOOSE, SECURED, BUT DEFERRED FOR CHANGE. LANDINGS: 4,474. (X)