What was found
DURING CLIMB-OUT, HAD SLAT ASSYMETRY LIGHT VISUAL CHECK OK SLATS APPEARED UP. ACCOMPLISHED ABNORMAL PROCEDURES, RETURNED JFK. THE SLAT LIGHT CAME ON AT FLAPS 1 DEGREE TO FULL UP. INTERROGATED PSEU, HAD FAULT CODE 280, LEFT OUTER SLAT NR 5 SENSOR. REPLACED SENSOR OPERATION NORMAL.