What was found
DUEL BRAKE FAULT MESSAGE RECIEVED . MESSAGE REMAINED ILLUMINATED WHEN GEAR EXTENDED FLIGHT DIVERTED. DECLARED EMERGENCY. MX FOLLOWED FIM 32-41-00-810-847-A, REPLACED NR 1 HYD BRAKE SHUTOFF VALVE IAW AMM 32-41-03. FAULT DISAPPEARED. FAULT THEN RE-APPEARED. MX CMC HAD NO LATCHED OR HISTORY OF CURRENT FAULT. INSPECTED AND CLEANED BRAKE SHUTOFF VALVE PRESSURE TRANSDUCERS. NO DEFECTS NOTED. REPLACED NR 2 SYSTEM PRESSURE TRANSDUCER IAW AMM 32-41-05, FAULT STILL DID NOT APPEAR. OPS CHECKED GOOD, NO FAULT CODE TO REFRENCE. FOLLOWED PREVIOUS FC3241101. BCM PERFORMED BMI SHUTOFF VALVE INITIATED TEST IAW AMM 45-45-00-970-805. REVIEWED CMC BCM1 SYS PARAMETERS. FOUND LT INBD BRAKE PRESSURE 30-30+ PSI HIGHER THAN THE OTHER 3 PRESSURES WITH PUMPS ON. PRESSURE WAS NORMAL WITHOUT PUMPS. REMOVED AND REPLACED SYSTEM 2 MAIN BRAKE CONTROL VALVE IAW AMM 32-41-09, LEAK AND OPS CHECKED GOOD. BCMI SYS PARAMETER FOR LT INBD BRAKE PRESSURE WAS IN THE SAME RANGE AS THE OTHER 3. OK FOR SERVICE. PERFORMED FIM 32-41-20-19,BCM. NO FAILURES SHOWED.