As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GNDED. DURING TAXI OUT IT FELT LIKE BRAKES WERE DRAGGING. INITIATED A RETURN TO GATE. REQUEST FIRE TRUCKS FOLLOW US. PRIOR TO ARRIVAL AT GATE ACFT CAME TO A COMPLETE UNCOMMANDED STOP. FOUND NR 1 TIRE BRAKE ASSEMBLY WITH METAL DEBRIS & SEIZED. R & R NR 1 BRAKE IAW AMM 32-41-41. ALL BRAKES CHECKED NORMAL.