What was found
LE SLAT DISAGREE EICAS MESSAGE AS FLAP EXTENDED TO FLAPS 1, WENT THROUGH QRH PROCEDURE WHICH LEAD TO A LE SLAT ASSYMETRY ISSUE. PERFORMED QRH PROCEDURE FOR LE SLAT ASSYMETRY. NO NOTED ADVERSE ROLL OR YAW. NO AIRCRAFT LIMITS EXCEEDED. NO STATUS MESSAGES NOTED ON SHUT DOWN. CHECKED FSEU AND NO FAULTS WERE FOUND ON 3 FSEU BOXES. RETURNED ALTN FLAP SWITCH TO NORMAL POSITION. CYCLED SLATS /FLAPS THRU SEVERAL CYCLES WITH NO DEFECTS NOTED. OPERATED SLATS/FLAPS IN ALTN AND ALSO NO DEFECTS NOTED. COMPLIED WITH TROUBLESHOOTING IAW FAULT TREE 27-81-803. NO HISTORY NOTED.