What was found
AIRCRAFT WAS GROUNDED: # 4 MAIN TIRE CAME APART ON LANDING. MAINTENANCE REPLACED THE #4 MAIN TIRE PER TASK CARD 26L70032008. (AALA202301136079) DURING THE ACCOMPLISHEMENT OF A BITE TEST OF THE BRAKE STEERING CONTROL UNIT PER AMM 32-42-34, BRAKE STEERING CONTROL UNIT FAULT 10GG AND TACHOMETER # 4 22GG FAULT DISPLAYED. MAINTENANCE REPLACED THE #4 TACHOMETER PER AMM 32-42-57 (AALA202301137706) AND REPLACED THE BRAKE STEERING CONTROL UNIT PER AMM 32-42-34 (AALA202301138331). A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO FAULTS NOTED.