As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING LANDING ROLL OUT, THE RT BRAKE FAILED. EMERGENCY BRAKES WERE USED TO STOP THE ACFT. INVESTIGATION REVEALED THE WHEEL DRIVE INSERT SEPARATED FROM THE WHEEL AND BECAME LODGED BETWEEN THE WHEEL AND BRAKE, SHEARING (2) BRAKE FITTINGS CAUSING LOSS OF HYD FLUID.