What was found
ACY - FLT 311 - UPON SLAT RETRACT, THE SLAT DISAGREEMENT LIGHT CAME ON AND SLAT OVERSPEED WARNING IN FLIGHT. FOLLOWED QRH PROCEDURES RETURNED TO KACY THERE WAS NO ROLL ASYMMETRY, AIRCRAFT WAS STABLE IN FLIGHT. REMOVED AND REPLACED NR 4 SLAT DRIVE DISAGREE PROX STRIKER PLATE IAW MD-80 SRM CH 51-30. (M)