As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FAT - WHEN TOE BRAKES APPLIED, NO BRAKE PRESSURE INCREASE ON LT OR RT GAUGE NOTED DURING BRAKE TEST PRIOR TO LANDING. THREE TO FIVE SECOND DELAY IN BRAKE ACTIVATION NOTED FOLLOWING BRAKE PEDAL APPLICATION. MAINTENANCE REPLACED BRAKE REDUCING VALVE. BRAKE SYSTEM OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE. (X)