What was found
AIRCRAFT WAS NOT GROUNDED: AN EMERGENCY WAS DECLARED INTO CLT DUE TO THE FLIGHT CREW REPORTING THAT AFTER DEPARTURE ECAM: YELLOW RESERVOIR LOW LEVEL. THE FLIGHT CREW FOLLOWED ECAM PROCEDURE AND TURNED OFF PTU AND YELLOW ENGINE 2 HYDRAULIC PUMP. THE GREEN AND BLUE HYDRAULIC SYSTEMS WERE NORMAL. THE AIRCRAFT LANDED SAFELY AT CLT AND TAXIED TO THE GATE UNDER ITS OWN POWER. MAINTENANCE REPLACED THE YELLOW RESERVOIR LOW LEVEL SWITCH PER AMM 29-13-41 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.