What was found
SLAT DISAGREEMENT LIGHT ILLUMINATED WITH SLATS EXTENDED, FLAPS AT 5 DEGREES, AND SPEED AT 220 KNOTS. RETRACTED SLATS AND AIRCRAFT ROLLED TO THE RIGHT. EXTENDED SLATS AGAIN WITH FLAPS SET AT 15 DEGREES. NORMAL SLAT CONFIGURATION WAS ACHIEVED. INSPECTED AND FOUND LEFT SLATS BINDING DURING EXTENSION. LUBED LEFT WING SLATS AND ROLLERS. OPERATIONAL CHECK OK. AIRCRAFT RETURNED TO SERVICE.