As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BRAKES REPLACED DUE TO WEAR INDICATOR 'BRAKES WORN TO LIMITS'. UPON DISASSEMBLY, FOUND ONE ROTOR CRACKED THROUGH ENTIRE LENGTH. FOUND TWO ROTORS WITH SAME DEFECT ON RIGHT BRAKE ASSEMBLY. THESE BRAKE ASSEMBLIES HAVE 502.3 HOURS SINCE OVERHAUL AND 480 LANDINGS. THESE BRAKES INSTALLED ON CESSNA CITATION 550. SUBMITTER STATED THIS APPEARS TO BE A RECURRING PROBLEM.