What was found
IN CRUISE FLIGHT HAD LOW BREAK PRESS AND ANITSKID INOP ANNUNCIATOR ILLUMINATE. COMPLETED QRH AND LANDED USING EMERGENCY PHEUMATIC BREAK SYSTEM. REMOVED AND REPLACED PCB NZ004 IN ACCORDANCE WITH CE-560XL MM 24-51-02. COMPUED WITH LANDING GEAR FUNCTIONAL TEST IN ACCORDANCE WITH CE-560XL MM 32-01-00. COMPUED WITH ANTI-SKID OPERATIONAL CHECKS IN ACCORDANCE WITH CE-560XL MM 32-44-00. ALL OPERATIONAL\ FUNCTIONAL CHECKS GOOD. NO FURTHER DEFECTS NOTED AT THIS TIME.