What was found
CLE FLIGHT#3738 THE CREW REPORTED AFTER TAKEOFF FROM CLE THEY RECEIVED A #1 HYDRAULIC SYSYTEM LOW QUANTITY INDICATION.THE AIRCRAFT RETURNED TO CLEVELAND AND LANDED WITHOUT FURTHER INCIDENT.MAINTENANCE INSPECTED AND REPLACED THE #1 AND #4 BRAKE ASSEMBLIES.THEY SUSPECTED THE #1 HYDRAULIC SYSTEM FLIUD WAS TRANSFERING TO THE #2 SYSTEM THROUGH THE BRAKES.THE AIRCRAFT WAS TEST FLOWN AND NO DEFECTS WERE NOTED.THE AIRCRAFT WAS RELEASED FOR SERVICE.#4 BRAKE S/N 0663 TSO:3444 TT:3444 CSN:2403