What was found
BRK FAIL YELLOW CLASS DISPLAYED UPON SETTING THE PARKING BRAKE WHILE HOLDING SHORT OF THE RUNWAY. REMOVED FAULTY BCM AND INSTALLED INSPECTED/TESTED. BCM COMPLETED OPS CHECKS OF THE HYD SYS WITH A ROBO MULE, COMPLETED A FUNCTIONAL TEST OF THE BRAKE SYSTEM ALL CHECKS GOOD. IAW AMM 32-41-07, 32-41-00, & 07-10-00. REMOVED DEGRADED RT FCSOV. INSTALLED REPAIRED FCSOV. PREFORMED A SATISFACTORY OPS CHECK OF THE PNEUMATIC SYSTEM, !AW AMM 2.1-21-01, & 36-00-003. REMOVED FAULTY BCU AND INSTALLED AN INSPECTED/TESTED BCU. PREFORMED A FUNCTIONAL TEST OF THE MAIN BRAKE SYSTEM. IAW AMM 32-41-01, & 32-41-00 ALL CHECKS GOOD.