What was found
LE SLAT DISAGREE DURING TURNS FOR APPROACH WIGH FLAPS 20 SELECTED AT 180 KTS LIGHT THEN WENT OUT. PERFORMED BITE CHECK IAW FIM TASK 27-81 FAULT TREE 807. RESET FSEU CIRCUIT BREAKERS AND MESSAGE CLEARED. OPS CHECKED GOOD IAW AMM 27-81-00LOG 671396 1 AFTER TAKE OFF . WITH FLAPS 5 DEG L.E. SLAT ASSY EICAS ILLUMINATED AT 400 FEET THEN WENT OFF AT 1000 LIGHT ILLUMINATED AGAIN THEN WENT OFF WITH FLAP RETRACTION, PREFORMED FIM TASK 27-81 FAULT TREE 809, NO ASYMMETRY INDICATION. ALSO RAN A BIT ON FSEU, NO FAULTS INDICATED, LE FLAP ASYM WITH FLAPS AT 20 DEGREES. REMOVED AND REPLACED FSEU IAW AMM 21-57-01-404-130. OPS CHECKED O, NO FAULTS NOTED.