What was found
AFTER TAKEOFF AND CLEAR UP, SHORTLY THEREAFTER THE AMBER LEADING EDGE FLAPS LIGHT CAME ON. RAN CHECKLIST, NO HELP. THE NR 2 LEADING EDGE FLAP WAS AMBER ON SECOND OFFICER'S POSITION INDICATOR. RETURNED FOR LANDING. CLEANED CANNON PLUG ON THE NR 2 LEADING EDGE FLAP POSITION INDICATING SWITCH. SYSTEM TESTED NORMALLY. ALL DONE PER MAINTENANCE CONTROL AND MAINTENANCE MANUAL 27-82-0 PAGE 101.