What was found
UPON RETRACTION OF SLATS AND FLAPS, SLAT DISAGREE LIGHT CAME ON AND REMAINED ON UNTIL SLATS RE-SELECTED. AFTER LANDING LIGHT CAME BACK ON WHEN SLAT/ FLAP SELECTED TO UP/RETRACT, AIR RETURN. INSPECTED PROXIMITY SWITCHES AND FOUND SWITCH ON NR 1 SLAT (C) SENSOR, CLEANED AND LUBED NR 1 SLAT PROXIMITY SENSOR AND PERFORMED OPS CHECK- GOOD. T/S FOUND LT WING SENSOR (CT) TARGET BAD, REMOVED AND REPLACED SENSOR AND PERFORMED TEST OF PROX BOX, NORMAL. (K)