What was found
Y RSVR LO LVL DISPLAYED ON UPPER ECAM SCREEN. - HYD GOT ECAM AT 50 KIASON TAKEOFF. REJECTEDAND RETURNED TO GATE. FOUND LEFT WING NO.4 SPOILER SERVO CONTROL LEAKING. REPLACED LEFT NO.4 SPOILER SERVO CONTROL IAW AMM 27-64-52-401. OPS CKS GOOD. PARTS USED: 31-2763-9-0001,QTY :1 ADD EMP:U118409 ROTABLE PARTS CHANGE WAS INDICATED-TT #1606301 SN OFF 7500 CONTROL, SERVO, OFF 31-2763-9-0001 7500 ON 31-2763-9-0001 1872. SERVICED YELLOW HYD SYS QTY. ACCOMPLISHED INSPECTION OF #4 LEFT SPOILER SERVO REQUIRED BY GMM 09-25-05. FOUND INSTALL TO BE PROPER & SECURE, OPS & LEAK CHECKS GOOD. REF AMM 27-64-52/401. VERIFIED LOCKOUTS DEVICES REMOVED. OK FOR SERVICE.