As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATB - EICAS "L/E SLAT ASYM" AND "LEADING EDGE " LIGHT ON WITH FLAP LEVER IN UP POSITION AND THRU FLAPS 30 POSITION. FLAP INDICATOR POINTERS SHOWED 1 WITH LEVER UP. REPLACED L/E SLAT SENSOR SWITCH PER MM 27-88-01. OPS CHK OK. BITE FSEU HAD FAULT CODE 27-81021. BITE PSEU FAULTED S284 PROX SWITCH CHECK S284 OK. REPLACED S284 PRECAUTIONARY PER TEXT SERVICE. CHECK OK PER TASK 27-88-01-722.