What was found
WHILE TURNING LEFT INTO PARKING, HAD A SIGNIFICANT LOSS OF EFFECTIVENESS ON THE RIGHT BRAKE. AIRCRAFT PIN-WHEELED 45 DEGREES LEFT BEFORE COULD GET IT STOPPED USING BOTH BRAKES. - BELLY ? SCREW & REMOVED. A/S CONTROL VALVE CONNECTOR REMOVED. RECONNECTED A/S CONTROL VALVE CONNECTOR. FOUND ACCUM PRESS, RESERVOIR LEVEL AND ANTI SKID SELF TEST OK. PERFORMED PINOUTS OF L AND R A/S GEN AT CONTROL CONNECTOR PN 010 AND CHECKED OK. PEDALS FIRM AND STEADY. REMOVED PBCV AND INSTALLED AN OVERHAULED UNIT IAW CE560XL MM 32-42-05. BLED BRAKE SYSTEM. BRAKES OP'S AND TAXI CHECK OK. (PBCV AND BRAKES LEAK CHECK OK.) RESERVOIR SERVICED TO FULL.