As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EICAS MSG L/E SLAT ASSYM ILLUMINATED WHILE EXTENDING FLAPS TO 15 DEGS. T/E FLAPS INDICATE 15 DEG L/E SLATS YELLOW. PSEU TEST SHOWS SENSOR TARGET 285. FOUND TARGET MISSING AND BOLT SHEARED. REPLACED BOLT AND TARGET TO INBOARD AUX TRACK NR 4 SLAT PER AMM NO RII PER TOPP 40-30-05. L/E SLAT OPS CK OK. EICAS MSG CLEARED.