What was found
BRK FAIL YELLOW CAS ON TAXI OUT. FAULT CONDITION FOR BRK FAIL RESET DOES NOT MEET RESET CRITERIA AS IT HAPPENED ON TAXI NOT AIRCRAFT STARTUP. BRAKES APPLICATIONS DID FEEL DEGRADED. REMOVED AND REPALCED BRAKE CONTROL UNIT. COMPLIED WITH FUNCTIONAL TEST AS REQUIRED WITH BRAKE PRESSURE GAUGE TOOLING. ALSO, REMOVED AND REPLACED BOTH LH AND RH BRAKE ASSEMBLY BLEED SCREW ADAPTER FITTINGS AFTER TEST GAUGE WAS REMOVED. AFTER PRESSURE TEST, BLED BRAKES AS REQUIRED. SERVICED HYDRAULIC RESERVOIR FLUID LEVEL AFTER BLEED. NO CAS MESSAGES POSTED, NO OTHER DEFECTS NOTED. RETURNED AIRCRAFT TO ORIGINAL CONFIGURATION AND CONDITION AT THIS TIME. REF AMM 32-