As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 4 LEADING EDGE SLAT OUTBOARD AUX TRACK MISSING BOLT, ROLLER, AND SENSE TARGET AFTER LANDING. UNKNOWN, MISSING PARTS WERE DISCOVERED BY EICAS L/E SLAT DISAGREE MESSAGE DUE TO MISSING L/E SLAT POSITION SENSOR TARGET. REPLACED MISSING PARTS PER APPLICABLE MAINTENANCE PROCEDURES. SENSOR SYSTEM WAS OPS CHECKED PER APPLICABLE MAINTENANCE MANUAL AND ALL OPS CHECKS WERE NORMAL.