What was found
SEA - FLT 67 - ON DEPARTURE, THE NR 1 MLG TIRE TREAD SEPARATED FROM ITS CASING CAUSING DAMAGED TO THE LT GEAR DOORS, LT I/B MID-FLAP, LT I/B TRAILING EDGE FLAP, LT LOWER WING SKIN, LT I/B THRUST REVERSER COWLING AND THE LT HORIZONTAL STABILIZER. MAINTENANCE REPLACED NR 1 MLG WHEEL ASSEMBLY AND REPLACED OR REPAIRED CONSEQUENTIAL DAMAGE AS REQUIRED. THE NR 2 MLG WHEEL ASSEMBLY WAS REPLACED AS A PRECAUTION. (W)