What was found
GOT SLAT DISAG ALERT AFTER TAKEOFF FROM KIX, ALERT CAME ON IMMEDIATELY AFTER TAKEOFF. NO ADVERSE ROLL MOMENT NOTED. RAN QRH AND ALERT WENT AWAY WHEN SLATS WERE RETRACTED. WHEN CONFIGURING FOR APPROACH AT PEK. SLAT DISAG ALERT CAME ON AGAIN. NO ADVERSE ROLL MOMENT. RAN QRH AND DID 28/RET APPROACH AND LANDING. T/S PER FIM 31-71-07-00. FOUND SENSOR LT ON WITH CODE 01. R&R LT NR 4 SLAT POSITION SENSOR A. P/N 8-614-02 IAW AMM 27-84-03-4. OPS TEST SLAT GOOD PER AMM 27-80-00-2. PSEU TEST SATIS PER AMM 31-71-01-2. A/C OK FOR SVC.