As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI, HEAVY PRESSURE HAS TO BE APPLIED TO BRAKES AND THEN THEY GRAB HARD. ALSO ON LANDING IT FEELS LIKE ANTISKID IS ACTIVATING FOR APPLIED PRESSURE. C/W 560 ANTI-SKID WIRING CHECK NO DEFECTS NOTED C/W VISUAL INSPECTION OF WIRING HARNESS CHECK GOOD. REMOVED AND REPLACED POWER BRAKE VALVE. BLED BRAKES TAXIED A/C BRAKES CHECK GOOD IAW CE560 MM 32-42-05.