What was found
ON APPROACH, CREW EXTENDED LANDING GEAR AND THE POWER BRAKE CIRCUIT BREAKER POPPED. CREW EXECUTED A GO AROUND AND DECLARED AN EMERGENCY. THEY RAN THE CHECKLIST WHICH INCLUDES RESETTING THE CIRCUIT BREAKER. WHEN THEY RECYCLED THE CIRCUIT BREAKER, THE LIGHT WENT OUT AND ISSUE SEEMED TO BE RESOLVED. THE AIRPORT HAD FIRE AND RESCUE MEET THE ACFT ANYWAY. THE LANDING WAS UNEVENTFUL. MX PERSONNEL TRAVELED TO ACFT TO FIND INTERMITTENT POWER BRAKE CIRCUIT BREAKER. BREAKER WAS REPLACED AND SYS FUNCTIONAL TEST PERFORMED SATISFACTORILY. ACFT RETURNED TO SERVICE.