What was found
AIRCRAFT WAS GROUNDED: WHILE DESCENDING ON THE ARRIVAL AND SELECTING FLAPS 1, RECEIVED ECAM MESSAGE FOR FLIGHT CONTROL SLATS FAULT AND FLIGHT CONTROL ALTERNATE LAW. FLIGHT CREW ACCOMPLISHED THE ECAM PROCEDURES AND FOLLOW UP ECAM ACTIONS. THE FLAPS/SLATS INDICATOR SHOWED SLATS UP WITH FLAPS SET TO 3. MAINTENANCE FOUND LEFT WING LEADING EDGE SLAT #5 INBOARD ACTUATOR 6041CM TRIPPED AND REPLACED IT PER AMM 27-84-49. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.