What was found
WHILE IN CRUISE AT FL340 LE FLAPS TRANSIT LIGHT CAME ON.SLAT 4 T RANSIT LT ILLUMINATED ON OVRHD PERFORMED FSEU BITE TEST FOUND FAULT MESSAGE NO: 27-81207. S4 INBD MARGINAL, CYCLED LEADING EDGE FLAPS AND SLATS. SLAT 4 LT ILLUMINATED BETWEEN FLAP LEVER POS 5 & 10. VISUALLY INSP MOVEMENT AND NO ABNORMALITIES NOTED. REF FIM 27-88 TASK 804. REMOVED AND REPLACED LEADING EDGE PROXIMITY SENSOR. LEADING EDGE FLAP AND SLAT PROXIMITY TEST CHECKS GOOD REF SWPM 20-30-12, AMM 27-88-11. PARTS USED: 29-2762-3-0093,QTY :1 00-0366-3-1286,QTY :1