What was found
PDIS 999 27-80 6604 16JAN19 PVD FACT U LOGPAGES:2804127 "LE SLAT DISAGREE" MESSAGE WHEN FLAP 1* SELECTED APPROXIMATE AIR SPEED 220 KTS. LANDED WITH FLAPS 20* USING ALTN TE FLAPS FACT 16JAN19 18:27 PVD U T/S "LE SLAT DISAGREE" MSG PRE FIM 27-81-00-815 FAULT TREE 803 FIG 104 AND FIM 27-51-00-815 FAULT TREE 805 OPS CHECKED THE LE SLAT AND FLPS SEVERAL TIMES WITH NORMAL HYD SYSTEM AND ALT SYSTEM NO FAULTS OR MSG RECIVED ON THE EICAS AND FSEU 1, 2, & 3. ALSO CHECKED THE FAULT HISTORY ON FSEU 1, 2, & 3 NO HISTORY OR CODE FOR "LE SLAT DISAGREE". OPS CHECKED GOOD. AC OK FOR SERVICE.