What was found
L/E SLAT DISAGEE EICAS AND 6, LEFT INBOARD AND RIGHT INBOARD WERE NOT FULLY EXTENDED. FURTHER INSPECTION REQUIRED. REFER TO FAULT TASK 27-51 FAULT TREE 809 AND 27-51 FAULT TREE 815. FSEU BITE REQUIRED. UPON ARRIVAL DEBRIEF CREW. NO OVERSPEED OCCURRED. ISSUED OCCURED WHEN TRYING TO MOVE FLAP/SLATS FROM 15 TO 5. THEY HAVE A LOCK OUT AND LE SLAT SHUT DOWN MESSAGE.THEY BROUGHT DOWN FLAPS USING ALTERNATE TO FLAPS 20. NOTICE THAT LE EDGE SLATS 5 T/S FIM 27-81 FAULT TREE 816, PERFORMED FSEU BITE AND FOUND 2 OPS CK GOOD. PARTS USED: 76-2751-9-0010,QTY :1 1869460,QTY EXISTING FAULTS 27-51325, AND 27-51326. REMOVED AND REPLACED :1 FSEU REF AMM 27-51-01, BOTH FAULTS CLEARED. CYCLED FLAPS FULL ROTABLE PARTS CHANGE WAS INDICATED - TT # 1869460 SN OFF 1050 DOWN AND UP SEVERAL TIMES, NO FAULTS NOTED. LEADING EDGE SLAS