As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI BRAKES RUMBLE WHEN PRESSURE IS APPLIED. CONDITION REPEATS ON PILOT AND COPILOT SIDES. RUMBLING OCCURED DURING SLOW TAXI (LESS THAN 10 KTS). RUMBLING ACTS LIKE LOW SPEED ACTIVATION ON ANTI-SKID (PULSING BRAKES). REPLACED BRAKE METERING VALVE WITH NEW FROM MFG IAW CHAPT 32-44-20 OF CE560XLS MM. VALVE BLED AND RIGGED AS NEEDED IAW CHAPT 32-44-00 OF CE560XLS MM. SYSTEM SERVICED AND SAFETIED AS NEEDED. OPERATIONAL AND FUNCTION TESTED GOOD. TAXI CHECK GOOD.