What was found
FLT#2536, STI-JFK. DECLARED AN EMERGENCY, ON THE FINAL APPROACH. SLATS INOPERATIVE. LANDED SLATS ZERO UAPP = 166K. SLAT ACTUATOR 6091CM WAS REPLACED AND OPS TEST WAS PERFORMED, REVIEWED CFOS/PFR, F/CTL HISTORY NOTED A/C ECAM FAULT "SLT 1 SYSTEM JAM"/SLT 2 SYS JAM. PRESSURIZED ALL HYD SYSTEMS AND CYCLED FLAP/SLATS TO FULL DEPLOYMENT & RETRACTION. NOTICED SLATS DEPLOYING AND RETRACTING VERY SLOWLY; FLAPS OPERATED NORMALLY. RESET FLP/SLT SYS'S 1&2. FLP/SLT DEPLOYMENT/RETRACTION ABNORMAL. ITEM #1 REMAINS OPEN.