As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI THERE WAS A HEAVY VIBRATION HEARD AND FELT WHEN BRAKES WERE APPLIED. THE VIBRATION CAME FROM RT BRAKE ONLY. LT SIDE OK. REMOVED AND REPLACED BRAKE METERING VALVE WITH A REPAIRED UNIT. BLED BRAKES PERFORMED OPERATIONAL CHECKS, OPS CHECKS GOOD IAW MM 32-42-00