What was found
UPON LANDING, THE FLIGHT CREW ROLLED OFF OF RUNWAY ONTO TAXIWAY ADD HAD NO BRAKES AT ALL. CREW POSITIONED THE PROPS INTO BETA TO SLOW THE ACFT. CREW THEN AGAIN TRIED TO APPLY BRAKES WITH NO BRAKING RESULTS. CREW THEN USED DIFFERENTIAL POWER SETTING ON BOTH ENGINES TO TAXI BACK TO THE HANGER. MX WAS NOTIFIED AND TROUBLESHOT TO A CLOGGED PRESSURE EQUALIZATION LINE. CLEANED THE LINE AND BLED THE BRAKE SYS. OPS CHECK OF THE BRAKE SYS WAS GOOD.