What was found
DURING CRUISE FROM KTEX TO KGPI, THE CREW NOTED THE MAIN/EMERGENCY BRAKE PRESSURE TO BE DROPPING. THE CREW DECIDED TO DIVERT TO KAPA. DURING APPROACH, THE CREW NOTED A MAIN BRAKE FAIL CAS WITH A TRIPPED ECB. THE ECB TRIPPED IMMEDIATELY AFTER THE FIRST ATTEMPT TO RESET IT. THE CREW MADE A SUCCESSFUL LANDING WITHOUT FURTHER INCIDENT. TECHNICIANS REPLACED THE PARKING BRAKE VALVE P/N 959.47.51.129 S/N OFF 0336, S/N ON 0347, AND THE BRAKE PUMP MOTOR P/N 960.30.01.173 S/N OFF 0431, S/N ON 0235 MOD B.