As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TRYING TO TAXI OUT AFTER PUSHBACK, ACFT CAME TO A SORT OF GRINDING STOP WITH NORMAL POWER. REQUIRED TOO MUCH POWER TO MAKE IT MOVE, TOWED BACK TO THE GATE. LOOKS LIKE LT INBD BRAKE PAD PIECES FALLING OUT. FOUND BRAKE PADS BROKEN ON LT INBD BRAKE. REMOVED LT INBD BRAKE & PERFORMED GVI OF LT OTBD MWA, BRAKE & LT MLG. NO FURTHER DAMAGED NOTED. INSTALLED LT INBD BRAKE IAW JC 900-32-730-901 & LT INBD MWA 900-32-730-708. OPERATIOS CHECKED GOOD.