What was found
FLT 1077, MCO-PUJ, RETURN TO FIELD. Y HYD RSVR OVHT. ECAM AFTER T/O. Y HYD ENG2 PUMP LOW PRESSURE, FOLLOWING QRH / ECAM BELOW 10,000 OVHT CLEARED. T/S IAW TSM 29-13-00-810-802-A. FOUND UNUSUAL NOISE WHEN E-PUMP OPERATED. REMOVED CHK VALVE 3083GM, FOUND CHK VALVE DEFECTIVE. REPLACED THE CHK VALVE 3083GM, OPS CHKD NORMAL. OPS TEST OF HYD YELLOW SYSTEM NORMAL. AIRCRAFT OK FOR SVC.