As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BEFORE FLIGHT, DURING TAXI FROM GATE TO DEICE RAMP THE CREW WAS NOTIFIED THAT LT TIRE WAS NOT ROTATING. THE AC RETURNED TO THE GATE. MECHANIC DISCOVERED THE NR 1 TIRE FLAT AND THE LT BRAKES FROZEN. MECHANIC REPLACED BOTH LT WHEEL ASSEMBLIES AND THE BRAKE. WITH NO FURTHER DISCREPANCIES NOTED THE AC WAS RETURNED TO SERVICE. (K)