What was found
KTEB - KBWI TRIP ID NR 807676 CREW REPORTED THAT WHILE ON LANDING ROLL OUT AT APPROXIMATELY 60 KTS, WHEN THE BRAKES WERE APPLIED THEY WOULD CATCH AND THE AIRCRAFT WOULD MOVE LEFT AND RIGHT OF THE CENTERLINE. WHILE AT TAXI SPEEDS THE AIRCRAFT WAS REPORTED AS HARD TO CONTROL WHEN USING THE BRAKES. MAINTENANCE FOUND THE LEFT AND RIGHT BRAKE LINES ON THE POWER BRAKE ANTI-SKID CONTROL VALVE TO BE REVERSED. THE LINES WERE CORRECTLY INSTALLED AND THE BRAKE/ANTI-SKID SYSTEM WAS BLED. BRAKING SYSTEMS OPERATIONALLY TESTED GOOD. AIRCRAFT WAS RETURNED TO SERVICE.