As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN BRAKING AFTER LANDING THERE IS A LOUD CHATTERING FROM THE BRAKES AND A VERY NOTICABLE VIBRATION AND SHUDDERIG THAT ACCOMPANIES RHE NOISE. WE CAN NOT TELL WHICH MAIN BRAKE IS CAUSING THE PROBLEM. BLED BRAKES AND FOUND A GOOD AMOUNT OF AIR IN THE SYSTEM. TECHS PERFORMED ENGINE RUN AND TAXI FOR OPERATIONAL CHECKS AND LEAK CHECKS. ALL CHECKED GOOD. ALL WORK COMPLETED IAW CE680A AMM 32-42-00 AND 71-00-00