What was found
PDIS 682 29-10 0412 23DEC21 MEM FACT U SHORTLY AFTER TAKEOFF, CLIMBING THRU 5000 FEET, ECAM DISPLAYED HYD LOW PRESSURE YELLOW SYSTEM. ECAM AND QRH WERE FOLLOWED AND AN UNEVENTFUL LANDING WAS MADE BACK TO RWY 18C KMEM. A300-600 AMM 29-24-00-05. RAN ENGINES PER JRH AND MONITORED HYDRAULIC PRESSURES FOR 10 MINUTES WITH NO FAULTS OR DISCREPANCIES NOTED REF A300-600 AMM 29-32-00-05. T/S PER TSM 29-32-00.REPLACED PRESSURE SWITCH 31WW PER AMM 31-53-51-04. OPS CK AND LEAKS CK GOOD AT THIS TIME