What was found
AFTER A NORMAL T/O AND FLAP RETRACTION, WE LEVELED AT 5,000 FT AND LEADING EDGE DEVICE LIGHT CAME ON 2 DEGREE SHOWED NR 5 LED UNSAFE. WING ANTI-ICE ON CHECKLIST COMPLETION EXTINGUISHED LIGHT BUT IT CAME ON AGAIN SEVERAL TIMES NO STRUCTURAL LIMITS EXCEEDED. ANTI-ICE CYCLED ON AND OFF WITH NO RESULTS. REPLACED NR 5 L/E KRUEGER FLAP SWITCH. L/E FLAP INDICATION OPS CHECK SATISFACTORY ON GROUND TEST.